From 84b980994934d54b3dad6dd2184830f4464b9933 Mon Sep 17 00:00:00 2001 From: Florian Jung Date: Sun, 29 Nov 2015 00:30:43 +0100 Subject: usb hello world \o/ --- usbdrv/Changelog.txt | 329 ------------------- usbdrv/CommercialLicense.txt | 166 ---------- usbdrv/License.txt | 361 --------------------- usbdrv/Readme.txt | 172 ---------- usbdrv/USB-ID-FAQ.txt | 149 --------- usbdrv/USB-IDs-for-free.txt | 154 --------- usbdrv/asmcommon.inc | 187 ----------- usbdrv/oddebug.c | 49 --- usbdrv/oddebug.h | 122 ------- usbdrv/usbconfig-prototype.h | 384 ---------------------- usbdrv/usbconfig.h | 376 ---------------------- usbdrv/usbdrv.c | 628 ------------------------------------ usbdrv/usbdrv.h | 746 ------------------------------------------ usbdrv/usbdrvasm.S | 392 ---------------------- usbdrv/usbdrvasm.asm | 20 -- usbdrv/usbdrvasm12.inc | 392 ---------------------- usbdrv/usbdrvasm128.inc | 749 ------------------------------------------- usbdrv/usbdrvasm15.inc | 422 ------------------------ usbdrv/usbdrvasm16.inc | 345 -------------------- usbdrv/usbdrvasm165.inc | 452 -------------------------- usbdrv/usbdrvasm18-crc.inc | 706 ---------------------------------------- usbdrv/usbdrvasm20.inc | 359 --------------------- usbdrv/usbportability.h | 143 --------- 23 files changed, 7803 deletions(-) delete mode 100644 usbdrv/Changelog.txt delete mode 100644 usbdrv/CommercialLicense.txt delete mode 100644 usbdrv/License.txt delete mode 100644 usbdrv/Readme.txt delete mode 100644 usbdrv/USB-ID-FAQ.txt delete mode 100644 usbdrv/USB-IDs-for-free.txt delete mode 100644 usbdrv/asmcommon.inc delete mode 100644 usbdrv/oddebug.c delete mode 100644 usbdrv/oddebug.h delete mode 100644 usbdrv/usbconfig-prototype.h delete mode 100644 usbdrv/usbconfig.h delete mode 100644 usbdrv/usbdrv.c delete mode 100644 usbdrv/usbdrv.h delete mode 100644 usbdrv/usbdrvasm.S delete mode 100644 usbdrv/usbdrvasm.asm delete mode 100644 usbdrv/usbdrvasm12.inc delete mode 100644 usbdrv/usbdrvasm128.inc delete mode 100644 usbdrv/usbdrvasm15.inc delete mode 100644 usbdrv/usbdrvasm16.inc delete mode 100644 usbdrv/usbdrvasm165.inc delete mode 100644 usbdrv/usbdrvasm18-crc.inc delete mode 100644 usbdrv/usbdrvasm20.inc delete mode 100644 usbdrv/usbportability.h (limited to 'usbdrv') diff --git a/usbdrv/Changelog.txt b/usbdrv/Changelog.txt deleted file mode 100644 index 79b5215..0000000 --- a/usbdrv/Changelog.txt +++ /dev/null @@ -1,329 +0,0 @@ -This file documents changes in the firmware-only USB driver for atmel's AVR -microcontrollers. New entries are always appended to the end of the file. -Scroll down to the bottom to see the most recent changes. - -2005-04-01: - - Implemented endpoint 1 as interrupt-in endpoint. - - Moved all configuration options to usbconfig.h which is not part of the - driver. - - Changed interface for usbVendorSetup(). - - Fixed compatibility with ATMega8 device. - - Various minor optimizations. - -2005-04-11: - - Changed interface to application: Use usbFunctionSetup(), usbFunctionRead() - and usbFunctionWrite() now. Added configuration options to choose which - of these functions to compile in. - - Assembler module delivers receive data non-inverted now. - - Made register and bit names compatible with more AVR devices. - -2005-05-03: - - Allow address of usbRxBuf on any memory page as long as the buffer does - not cross 256 byte page boundaries. - - Better device compatibility: works with Mega88 now. - - Code optimization in debugging module. - - Documentation updates. - -2006-01-02: - - Added (free) default Vendor- and Product-IDs bought from voti.nl. - - Added USBID-License.txt file which defines the rules for using the free - shared VID/PID pair. - - Added Readme.txt to the usbdrv directory which clarifies administrative - issues. - -2006-01-25: - - Added "configured state" to become more standards compliant. - - Added "HALT" state for interrupt endpoint. - - Driver passes the "USB Command Verifier" test from usb.org now. - - Made "serial number" a configuration option. - - Minor optimizations, we now recommend compiler option "-Os" for best - results. - - Added a version number to usbdrv.h - -2006-02-03: - - New configuration variable USB_BUFFER_SECTION for the memory section where - the USB rx buffer will go. This defaults to ".bss" if not defined. Since - this buffer MUST NOT cross 256 byte pages (not even touch a page at the - end), the user may want to pass a linker option similar to - "-Wl,--section-start=.mybuffer=0x800060". - - Provide structure for usbRequest_t. - - New defines for USB constants. - - Prepared for HID implementations. - - Increased data size limit for interrupt transfers to 8 bytes. - - New macro usbInterruptIsReady() to query interrupt buffer state. - -2006-02-18: - - Ensure that the data token which is sent as an ack to an OUT transfer is - always zero sized. This fixes a bug where the host reports an error after - sending an out transfer to the device, although all data arrived at the - device. - - Updated docs in usbdrv.h to reflect changed API in usbFunctionWrite(). - -* Release 2006-02-20 - - - Give a compiler warning when compiling with debugging turned on. - - Added Oleg Semyonov's changes for IAR-cc compatibility. - - Added new (optional) functions usbDeviceConnect() and usbDeviceDisconnect() - (also thanks to Oleg!). - - Rearranged tests in usbPoll() to save a couple of instructions in the most - likely case that no actions are pending. - - We need a delay between the SET ADDRESS request until the new address - becomes active. This delay was handled in usbPoll() until now. Since the - spec says that the delay must not exceed 2ms, previous versions required - aggressive polling during the enumeration phase. We have now moved the - handling of the delay into the interrupt routine. - - We must not reply with NAK to a SETUP transaction. We can only achieve this - by making sure that the rx buffer is empty when SETUP tokens are expected. - We therefore don't pass zero sized data packets from the status phase of - a transfer to usbPoll(). This change MAY cause troubles if you rely on - receiving a less than 8 bytes long packet in usbFunctionWrite() to - identify the end of a transfer. usbFunctionWrite() will NEVER be called - with a zero length. - -* Release 2006-03-14 - - - Improved IAR C support: tiny memory model, more devices - - Added template usbconfig.h file under the name usbconfig-prototype.h - -* Release 2006-03-26 - - - Added provision for one more interrupt-in endpoint (endpoint 3). - - Added provision for one interrupt-out endpoint (endpoint 1). - - Added flowcontrol macros for USB. - - Added provision for custom configuration descriptor. - - Allow ANY two port bits for D+ and D-. - - Merged (optional) receive endpoint number into global usbRxToken variable. - - Use USB_CFG_IOPORTNAME instead of USB_CFG_IOPORT. We now construct the - variable name from the single port letter instead of computing the address - of related ports from the output-port address. - -* Release 2006-06-26 - - - Updated documentation in usbdrv.h and usbconfig-prototype.h to reflect the - new features. - - Removed "#warning" directives because IAR does not understand them. Use - unused static variables instead to generate a warning. - - Do not include when compiling with IAR. - - Introduced USB_CFG_DESCR_PROPS_* in usbconfig.h to configure how each - USB descriptor should be handled. It is now possible to provide descriptor - data in Flash, RAM or dynamically at runtime. - - STALL is now a status in usbTxLen* instead of a message. We can now conform - to the spec and leave the stall status pending until it is cleared. - - Made usbTxPacketCnt1 and usbTxPacketCnt3 public. This allows the - application code to reset data toggling on interrupt pipes. - -* Release 2006-07-18 - - - Added an #if !defined __ASSEMBLER__ to the warning in usbdrv.h. This fixes - an assembler error. - - usbDeviceDisconnect() takes pull-up resistor to high impedance now. - -* Release 2007-02-01 - - - Merged in some code size improvements from usbtiny (thanks to Dick - Streefland for these optimizations!) - - Special alignment requirement for usbRxBuf not required any more. Thanks - again to Dick Streefland for this hint! - - Reverted to "#warning" instead of unused static variables -- new versions - of IAR CC should handle this directive. - - Changed Open Source license to GNU GPL v2 in order to make linking against - other free libraries easier. We no longer require publication of the - circuit diagrams, but we STRONGLY encourage it. If you improve the driver - itself, PLEASE grant us a royalty free license to your changes for our - commercial license. - -* Release 2007-03-29 - - - New configuration option "USB_PUBLIC" in usbconfig.h. - - Set USB version number to 1.10 instead of 1.01. - - Code used USB_CFG_DESCR_PROPS_STRING_DEVICE and - USB_CFG_DESCR_PROPS_STRING_PRODUCT inconsistently. Changed all occurrences - to USB_CFG_DESCR_PROPS_STRING_PRODUCT. - - New assembler module for 16.5 MHz RC oscillator clock with PLL in receiver - code. - - New assembler module for 16 MHz crystal. - - usbdrvasm.S contains common code only, clock-specific parts have been moved - to usbdrvasm12.S, usbdrvasm16.S and usbdrvasm165.S respectively. - -* Release 2007-06-25 - - - 16 MHz module: Do SE0 check in stuffed bits as well. - -* Release 2007-07-07 - - - Define hi8(x) for IAR compiler to limit result to 8 bits. This is necessary - for negative values. - - Added 15 MHz module contributed by V. Bosch. - - Interrupt vector name can now be configured. This is useful if somebody - wants to use a different hardware interrupt than INT0. - -* Release 2007-08-07 - - - Moved handleIn3 routine in usbdrvasm16.S so that relative jump range is - not exceeded. - - More config options: USB_RX_USER_HOOK(), USB_INITIAL_DATATOKEN, - USB_COUNT_SOF - - USB_INTR_PENDING can now be a memory address, not just I/O - -* Release 2007-09-19 - - - Split out common parts of assembler modules into separate include file - - Made endpoint numbers configurable so that given interface definitions - can be matched. See USB_CFG_EP3_NUMBER in usbconfig-prototype.h. - - Store endpoint number for interrupt/bulk-out so that usbFunctionWriteOut() - can handle any number of endpoints. - - Define usbDeviceConnect() and usbDeviceDisconnect() even if no - USB_CFG_PULLUP_IOPORTNAME is defined. Directly set D+ and D- to 0 in this - case. - -* Release 2007-12-01 - - - Optimize usbDeviceConnect() and usbDeviceDisconnect() for less code size - when USB_CFG_PULLUP_IOPORTNAME is not defined. - -* Release 2007-12-13 - - - Renamed all include-only assembler modules from *.S to *.inc so that - people don't add them to their project sources. - - Distribute leap bits in tx loop more evenly for 16 MHz module. - - Use "macro" and "endm" instead of ".macro" and ".endm" for IAR - - Avoid compiler warnings for constant expr range by casting some values in - USB descriptors. - -* Release 2008-01-21 - - - Fixed bug in 15 and 16 MHz module where the new address set with - SET_ADDRESS was already accepted at the next NAK or ACK we send, not at - the next data packet we send. This caused problems when the host polled - too fast. Thanks to Alexander Neumann for his help and patience debugging - this issue! - -* Release 2008-02-05 - - - Fixed bug in 16.5 MHz module where a register was used in the interrupt - handler before it was pushed. This bug was introduced with version - 2007-09-19 when common parts were moved to a separate file. - - Optimized CRC routine (thanks to Reimar Doeffinger). - -* Release 2008-02-16 - - - Removed outdated IAR compatibility stuff (code sections). - - Added hook macros for USB_RESET_HOOK() and USB_SET_ADDRESS_HOOK(). - - Added optional routine usbMeasureFrameLength() for calibration of the - internal RC oscillator. - -* Release 2008-02-28 - - - USB_INITIAL_DATATOKEN defaults to USBPID_DATA1 now, which means that we - start with sending USBPID_DATA0. - - Changed defaults in usbconfig-prototype.h - - Added free USB VID/PID pair for MIDI class devices - - Restructured AVR-USB as separate package, not part of PowerSwitch any more. - -* Release 2008-04-18 - - - Restructured usbdrv.c so that it is easier to read and understand. - - Better code optimization with gcc 4. - - If a second interrupt in endpoint is enabled, also add it to config - descriptor. - - Added config option for long transfers (above 254 bytes), see - USB_CFG_LONG_TRANSFERS in usbconfig.h. - - Added 20 MHz module contributed by Jeroen Benschop. - -* Release 2008-05-13 - - - Fixed bug in libs-host/hiddata.c function usbhidGetReport(): length - was not incremented, pointer to length was incremented instead. - - Added code to command line tool(s) which claims an interface. This code - is disabled by default, but may be necessary on newer Linux kernels. - - Added usbconfig.h option "USB_CFG_CHECK_DATA_TOGGLING". - - New header "usbportability.h" prepares ports to other development - environments. - - Long transfers (above 254 bytes) did not work when usbFunctionRead() was - used to supply the data. Fixed this bug. [Thanks to Alexander Neumann!] - - In hiddata.c (example code for sending/receiving data over HID), use - USB_RECIP_DEVICE instead of USB_RECIP_INTERFACE for control transfers so - that we need not claim the interface. - - in usbPoll() loop 20 times polling for RESET state instead of 10 times. - This accounts for the higher clock rates we now support. - - Added a module for 12.8 MHz RC oscillator with PLL in receiver loop. - - Added hook to SOF code so that oscillator can be tuned to USB frame clock. - - Added timeout to waitForJ loop. Helps preventing unexpected hangs. - - Added example code for oscillator tuning to libs-device (thanks to - Henrik Haftmann for the idea to this routine). - - Implemented option USB_CFG_SUPPRESS_INTR_CODE. - -* Release 2008-10-22 - - - Fixed libs-device/osctune.h: OSCCAL is memory address on ATMega88 and - similar, not offset of 0x20 needs to be added. - - Allow distribution under GPLv3 for those who have to link against other - code distributed under GPLv3. - -* Release 2008-11-26 - - - Removed libusb-win32 dependency for hid-data example in Makefile.windows. - It was never required and confused many people. - - Added extern uchar usbRxToken to usbdrv.h. - - Integrated a module with CRC checks at 18 MHz by Lukas Schrittwieser. - -* Release 2009-03-23 - - - Hid-mouse example used settings from hid-data example, fixed that. - - Renamed project to V-USB due to a trademark issue with Atmel(r). - - Changed CommercialLicense.txt and USBID-License.txt to make the - background of USB ID registration clearer. - -* Release 2009-04-15 - - - Changed CommercialLicense.txt to reflect the new range of PIDs from - Jason Kotzin. - - Removed USBID-License.txt in favor of USB-IDs-for-free.txt and - USB-ID-FAQ.txt - - Fixed a bug in the 12.8 MHz module: End Of Packet decection was made in - the center between bit 0 and 1 of each byte. This is where the data lines - are expected to change and the sampled data may therefore be nonsense. - We therefore check EOP ONLY if bits 0 AND 1 have both been read as 0 on D-. - - Fixed a bitstuffing problem in the 16 MHz module: If bit 6 was stuffed, - the unstuffing code in the receiver routine was 1 cycle too long. If - multiple bytes had the unstuffing in bit 6, the error summed up until the - receiver was out of sync. - - Included option for faster CRC routine. - Thanks to Slawomir Fras (BoskiDialer) for this code! - - Updated bits in Configuration Descriptor's bmAttributes according to - USB 1.1 (in particular bit 7, it is a must-be-set bit now). - -* Release 2009-08-22 - - - Moved first DBG1() after odDebugInit() in all examples. - - Use vector INT0_vect instead of SIG_INTERRUPT0 if defined. This makes - V-USB compatible with the new "p" suffix devices (e.g. ATMega328p). - - USB_CFG_CLOCK_KHZ setting is now required in usbconfig.h (no default any - more). - - New option USB_CFG_DRIVER_FLASH_PAGE allows boot loaders on devices with - more than 64 kB flash. - - Built-in configuration descriptor allows custom definition for second - endpoint now. - -* Release 2010-07-15 - - - Fixed bug in usbDriverSetup() which prevented descriptor sizes above 255 - bytes. - - Avoid a compiler warning for unused parameter in usbHandleResetHook() when - compiler option -Wextra is enabled. - - Fixed wrong hex value for some IDs in USB-IDs-for-free.txt. - - Keep a define for USBATTR_BUSPOWER, although the flag does not exist - in USB 1.1 any more. Set it to 0. This is for backward compatibility. - -* Release 2012-01-09 - - - Define a separate (defined) type for usbMsgPtr so that projects using a - tiny memory model can define it to an 8 bit type in usbconfig.h. This - change also saves a couple of bytes when using a scalar 16 bit type. - - Inserted "const" keyword for all PROGMEM declarations because new GCC - requires it. - - Fixed problem with dependence of usbportability.h on usbconfig.h. This - problem occurred with IAR CC only. - - Prepared repository for github.com. - -* Release 2012-12-06 \ No newline at end of file diff --git a/usbdrv/CommercialLicense.txt b/usbdrv/CommercialLicense.txt deleted file mode 100644 index de1a2b0..0000000 --- a/usbdrv/CommercialLicense.txt +++ /dev/null @@ -1,166 +0,0 @@ -V-USB Driver Software License Agreement -Version 2012-07-09 - -THIS LICENSE AGREEMENT GRANTS YOU CERTAIN RIGHTS IN A SOFTWARE. YOU CAN -ENTER INTO THIS AGREEMENT AND ACQUIRE THE RIGHTS OUTLINED BELOW BY PAYING -THE AMOUNT ACCORDING TO SECTION 4 ("PAYMENT") TO OBJECTIVE DEVELOPMENT. - - -1 DEFINITIONS - -1.1 "OBJECTIVE DEVELOPMENT" shall mean OBJECTIVE DEVELOPMENT Software GmbH, -Grosse Schiffgasse 1A/7, 1020 Wien, AUSTRIA. - -1.2 "You" shall mean the Licensee. - -1.3 "V-USB" shall mean all files included in the package distributed under -the name "vusb" by OBJECTIVE DEVELOPMENT (http://www.obdev.at/vusb/) -unless otherwise noted. This includes the firmware-only USB device -implementation for Atmel AVR microcontrollers, some simple device examples -and host side software examples and libraries. - - -2 LICENSE GRANTS - -2.1 Source Code. OBJECTIVE DEVELOPMENT shall furnish you with the source -code of V-USB. - -2.2 Distribution and Use. OBJECTIVE DEVELOPMENT grants you the -non-exclusive right to use, copy and distribute V-USB with your hardware -product(s), restricted by the limitations in section 3 below. - -2.3 Modifications. OBJECTIVE DEVELOPMENT grants you the right to modify -the source code and your copy of V-USB according to your needs. - -2.4 USB IDs. OBJECTIVE DEVELOPMENT furnishes you with one or two USB -Product ID(s), sent to you in e-mail. These Product IDs are reserved -exclusively for you. OBJECTIVE DEVELOPMENT has obtained USB Product ID -ranges under the Vendor ID 5824 from Wouter van Ooijen (Van Ooijen -Technische Informatica, www.voti.nl) and under the Vendor ID 8352 from -Jason Kotzin (now flirc.tv, Inc.). Both owners of the Vendor IDs have -obtained these IDs from the USB Implementers Forum, Inc. (www.usb.org). -OBJECTIVE DEVELOPMENT disclaims all liability which might arise from the -assignment of USB IDs. - -2.5 USB Certification. Although not part of this agreement, we want to make -it clear that you cannot become USB certified when you use V-USB or a USB -Product ID assigned by OBJECTIVE DEVELOPMENT. AVR microcontrollers don't -meet the electrical specifications required by the USB specification and -the USB Implementers Forum certifies only members who bought a Vendor ID of -their own. - - -3 LICENSE RESTRICTIONS - -3.1 Number of Units. Only one of the following three definitions is -applicable. Which one is determined by the amount you pay to OBJECTIVE -DEVELOPMENT, see section 4 ("Payment") below. - -Hobby License: You may use V-USB according to section 2 above in no more -than 5 hardware units. These units must not be sold for profit. - -Entry Level License: You may use V-USB according to section 2 above in no -more than 150 hardware units. - -Professional License: You may use V-USB according to section 2 above in -any number of hardware units, except for large scale production ("unlimited -fair use"). Quantities below 10,000 units are not considered large scale -production. If your reach quantities which are obviously large scale -production, you must pay a license fee of 0.10 EUR per unit for all units -above 10,000. - -3.2 Rental. You may not rent, lease, or lend V-USB or otherwise encumber -any copy of V-USB, or any of the rights granted herein. - -3.3 Transfer. You may not transfer your rights under this Agreement to -another party without OBJECTIVE DEVELOPMENT's prior written consent. If -such consent is obtained, you may permanently transfer this License to -another party. The recipient of such transfer must agree to all terms and -conditions of this Agreement. - -3.4 Reservation of Rights. OBJECTIVE DEVELOPMENT retains all rights not -expressly granted. - -3.5 Non-Exclusive Rights. Your license rights under this Agreement are -non-exclusive. - -3.6 Third Party Rights. This Agreement cannot grant you rights controlled -by third parties. In particular, you are not allowed to use the USB logo or -other trademarks owned by the USB Implementers Forum, Inc. without their -consent. Since such consent depends on USB certification, it should be -noted that V-USB will not pass certification because it does not -implement checksum verification and the microcontroller ports do not meet -the electrical specifications. - - -4 PAYMENT - -The payment amount depends on the variation of this agreement (according to -section 3.1) into which you want to enter. Concrete prices are listed on -OBJECTIVE DEVELOPMENT's web site, usually at -http://www.obdev.at/vusb/license.html. You agree to pay the amount listed -there to OBJECTIVE DEVELOPMENT or OBJECTIVE DEVELOPMENT's payment processor -or reseller. - - -5 COPYRIGHT AND OWNERSHIP - -V-USB is protected by copyright laws and international copyright -treaties, as well as other intellectual property laws and treaties. V-USB -is licensed, not sold. - - -6 TERM AND TERMINATION - -6.1 Term. This Agreement shall continue indefinitely. However, OBJECTIVE -DEVELOPMENT may terminate this Agreement and revoke the granted license and -USB-IDs if you fail to comply with any of its terms and conditions. - -6.2 Survival of Terms. All provisions regarding secrecy, confidentiality -and limitation of liability shall survive termination of this agreement. - - -7 DISCLAIMER OF WARRANTY AND LIABILITY - -LIMITED WARRANTY. V-USB IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY -KIND. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, OBJECTIVE -DEVELOPMENT AND ITS SUPPLIERS HEREBY DISCLAIM ALL WARRANTIES, EITHER -EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES -OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND -NON-INFRINGEMENT, WITH REGARD TO V-USB, AND THE PROVISION OF OR FAILURE -TO PROVIDE SUPPORT SERVICES. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL -RIGHTS. YOU MAY HAVE OTHERS, WHICH VARY FROM STATE/JURISDICTION TO -STATE/JURISDICTION. - -LIMITATION OF LIABILITY. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, -IN NO EVENT SHALL OBJECTIVE DEVELOPMENT OR ITS SUPPLIERS BE LIABLE FOR ANY -SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER -(INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, -BUSINESS INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR ANY OTHER PECUNIARY -LOSS) ARISING OUT OF THE USE OF OR INABILITY TO USE V-USB OR THE -PROVISION OF OR FAILURE TO PROVIDE SUPPORT SERVICES, EVEN IF OBJECTIVE -DEVELOPMENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN ANY -CASE, OBJECTIVE DEVELOPMENT'S ENTIRE LIABILITY UNDER ANY PROVISION OF THIS -AGREEMENT SHALL BE LIMITED TO THE AMOUNT ACTUALLY PAID BY YOU FOR V-USB. - - -8 MISCELLANEOUS TERMS - -8.1 Marketing. OBJECTIVE DEVELOPMENT has the right to mention for marketing -purposes that you entered into this agreement. - -8.2 Entire Agreement. This document represents the entire agreement between -OBJECTIVE DEVELOPMENT and you. It may only be modified in writing signed by -an authorized representative of both, OBJECTIVE DEVELOPMENT and you. - -8.3 Severability. In case a provision of these terms and conditions should -be or become partly or entirely invalid, ineffective, or not executable, -the validity of all other provisions shall not be affected. - -8.4 Applicable Law. This agreement is governed by the laws of the Republic -of Austria. - -8.5 Responsible Courts. The responsible courts in Vienna/Austria will have -exclusive jurisdiction regarding all disputes in connection with this -agreement. - diff --git a/usbdrv/License.txt b/usbdrv/License.txt deleted file mode 100644 index 4460cfb..0000000 --- a/usbdrv/License.txt +++ /dev/null @@ -1,361 +0,0 @@ -OBJECTIVE DEVELOPMENT GmbH's V-USB driver software is distributed under the -terms and conditions of the GNU GPL version 2 or the GNU GPL version 3. 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Of course, the commands you use may -be called something other than `show w' and `show c'; they could even be -mouse-clicks or menu items--whatever suits your program. - -You should also get your employer (if you work as a programmer) or your -school, if any, to sign a "copyright disclaimer" for the program, if -necessary. Here is a sample; alter the names: - - Yoyodyne, Inc., hereby disclaims all copyright interest in the program - `Gnomovision' (which makes passes at compilers) written by James Hacker. - - , 1 April 1989 - Ty Coon, President of Vice - -This General Public License does not permit incorporating your program into -proprietary programs. If your program is a subroutine library, you may -consider it more useful to permit linking proprietary applications with the -library. If this is what you want to do, use the GNU Library General -Public License instead of this License. diff --git a/usbdrv/Readme.txt b/usbdrv/Readme.txt deleted file mode 100644 index 970dc66..0000000 --- a/usbdrv/Readme.txt +++ /dev/null @@ -1,172 +0,0 @@ -This is the Readme file to Objective Development's firmware-only USB driver -for Atmel AVR microcontrollers. For more information please visit -http://www.obdev.at/vusb/ - -This directory contains the USB firmware only. Copy it as-is to your own -project and add all .c and .S files to your project (these files are marked -with an asterisk in the list below). Then copy usbconfig-prototype.h as -usbconfig.h to your project and edit it according to your configuration. - - -TECHNICAL DOCUMENTATION -======================= -The technical documentation (API) for the firmware driver is contained in the -file "usbdrv.h". Please read all of it carefully! Configuration options are -documented in "usbconfig-prototype.h". - -The driver consists of the following files: - Readme.txt ............. The file you are currently reading. - Changelog.txt .......... Release notes for all versions of the driver. - usbdrv.h ............... Driver interface definitions and technical docs. -* usbdrv.c ............... High level language part of the driver. Link this - module to your code! -* usbdrvasm.S ............ Assembler part of the driver. This module is mostly - a stub and includes one of the usbdrvasm*.S files - depending on processor clock. Link this module to - your code! - usbdrvasm*.inc ......... Assembler routines for particular clock frequencies. - Included by usbdrvasm.S, don't link it directly! - asmcommon.inc .......... Common assembler routines. Included by - usbdrvasm*.inc, don't link it directly! - usbconfig-prototype.h .. Prototype for your own usbdrv.h file. -* oddebug.c .............. Debug functions. Only used when DEBUG_LEVEL is - defined to a value greater than 0. Link this module - to your code! - oddebug.h .............. Interface definitions of the debug module. - usbportability.h ....... Header with compiler-dependent stuff. - usbdrvasm.asm .......... Compatibility stub for IAR-C-compiler. Use this - module instead of usbdrvasm.S when you assembler - with IAR's tools. - License.txt ............ Open Source license for this driver. - CommercialLicense.txt .. Optional commercial license for this driver. - USB-ID-FAQ.txt ......... General infos about USB Product- and Vendor-IDs. - USB-IDs-for-free.txt ... List and terms of use for free shared PIDs. - -(*) ... These files should be linked to your project. - - -CPU CORE CLOCK FREQUENCY -======================== -We supply assembler modules for clock frequencies of 12 MHz, 12.8 MHz, 15 MHz, -16 MHz, 16.5 MHz 18 MHz and 20 MHz. Other clock rates are not supported. The -actual clock rate must be configured in usbconfig.h. - -12 MHz Clock -This is the traditional clock rate of V-USB because it's the lowest clock -rate where the timing constraints of the USB spec can be met. - -15 MHz Clock -Similar to 12 MHz, but some NOPs inserted. On the other hand, the higher clock -rate allows for some loops which make the resulting code size somewhat smaller -than the 12 MHz version. - -16 MHz Clock -This clock rate has been added for users of the Arduino board and other -ready-made boards which come with a fixed 16 MHz crystal. It's also an option -if you need the slightly higher clock rate for performance reasons. Since -16 MHz is not divisible by the USB low speed bit clock of 1.5 MHz, the code -is somewhat tricky and has to insert a leap cycle every third byte. - -12.8 MHz and 16.5 MHz Clock -The assembler modules for these clock rates differ from the other modules -because they have been built for an RC oscillator with only 1% precision. The -receiver code inserts leap cycles to compensate for clock deviations. 1% is -also the precision which can be achieved by calibrating the internal RC -oscillator of the AVR. Please note that only AVRs with internal 64 MHz PLL -oscillator can reach 16.5 MHz with the RC oscillator. This includes the very -popular ATTiny25, ATTiny45, ATTiny85 series as well as the ATTiny26. Almost -all AVRs can reach 12.8 MHz, although this is outside the specified range. - -See the EasyLogger example at http://www.obdev.at/vusb/easylogger.html for -code which calibrates the RC oscillator based on the USB frame clock. - -18 MHz Clock -This module is closer to the USB specification because it performs an on the -fly CRC check for incoming packets. Packets with invalid checksum are -discarded as required by the spec. If you also implement checks for data -PID toggling on application level (see option USB_CFG_CHECK_DATA_TOGGLING -in usbconfig.h for more info), this ensures data integrity. Due to the CRC -tables and alignment requirements, this code is bigger than modules for other -clock rates. To activate this module, you must define USB_CFG_CHECK_CRC to 1 -and USB_CFG_CLOCK_KHZ to 18000 in usbconfig.h. - -20 MHz Clock -This module is for people who won't do it with less than the maximum. Since -20 MHz is not divisible by the USB low speed bit clock of 1.5 MHz, the code -uses similar tricks as the 16 MHz module to insert leap cycles. - - -USB IDENTIFIERS -=============== -Every USB device needs a vendor- and a product-identifier (VID and PID). VIDs -are obtained from usb.org for a price of 1,500 USD. Once you have a VID, you -can assign PIDs at will. - -Since an entry level cost of 1,500 USD is too high for most small companies -and hobbyists, we provide some VID/PID pairs for free. See the file -USB-IDs-for-free.txt for details. - -Objective Development also has some license offerings which include product -IDs. See http://www.obdev.at/vusb/ for details. - - -DEVELOPMENT SYSTEM -================== -This driver has been developed and optimized for the GNU compiler version 3 -and 4. We recommend that you use the GNU compiler suite because it is freely -available. V-USB has also been ported to the IAR compiler and assembler. It -has been tested with IAR 4.10B/W32 and 4.12A/W32 on an ATmega8 with the -"small" and "tiny" memory model. Not every release is tested with IAR CC and -the driver may therefore fail to compile with IAR. Please note that gcc is -more efficient for usbdrv.c because this module has been deliberately -optimized for gcc. - -Gcc version 3 produces smaller code than version 4 due to new optimizing -capabilities which don't always improve things on 8 bit CPUs. The code size -generated by gcc 4 can be reduced with the compiler options --fno-move-loop-invariants, -fno-tree-scev-cprop and --fno-inline-small-functions in addition to -Os. On devices with more than -8k of flash memory, we also recommend the linker option --relax (written as --Wl,--relax for gcc) to convert absolute calls into relative where possible. - -For more information about optimizing options see: - - http://www.tty1.net/blog/2008-04-29-avr-gcc-optimisations_en.html - -These optimizations are good for gcc 4.x. Version 3.x of gcc does not support -most of these options and produces good code anyway. - - -USING V-USB FOR FREE -==================== -The AVR firmware driver is published under the GNU General Public License -Version 2 (GPL2) and the GNU General Public License Version 3 (GPL3). It is -your choice whether you apply the terms of version 2 or version 3. - -If you decide for the free GPL2 or GPL3, we STRONGLY ENCOURAGE you to do the -following things IN ADDITION to the obligations from the GPL: - -(1) Publish your entire project on a web site and drop us a note with the URL. -Use the form at http://www.obdev.at/vusb/feedback.html for your submission. -If you don't have a web site, you can publish the project in obdev's -documentation wiki at -http://www.obdev.at/goto.php?t=vusb-wiki&p=hosted-projects. - -(2) Adhere to minimum publication standards. Please include AT LEAST: - - a circuit diagram in PDF, PNG or GIF format - - full source code for the host software - - a Readme.txt file in ASCII format which describes the purpose of the - project and what can be found in which directories and which files - - a reference to http://www.obdev.at/vusb/ - -(3) If you improve the driver firmware itself, please give us a free license -to your modifications for our commercial license offerings. - - -COMMERCIAL LICENSES FOR V-USB -============================= -If you don't want to publish your source code under the terms of the GPL, -you can simply pay money for V-USB. As an additional benefit you get -USB PIDs for free, reserved exclusively to you. See the file -"CommercialLicense.txt" for details. - diff --git a/usbdrv/USB-ID-FAQ.txt b/usbdrv/USB-ID-FAQ.txt deleted file mode 100644 index a4a6bd6..0000000 --- a/usbdrv/USB-ID-FAQ.txt +++ /dev/null @@ -1,149 +0,0 @@ -Version 2012-07-09 - -========================== -WHY DO WE NEED THESE IDs? -========================== - -USB is more than a low level protocol for data transport. It also defines a -common set of requests which must be understood by all devices. And as part -of these common requests, the specification defines data structures, the -USB Descriptors, which are used to describe the properties of the device. - -From the perspective of an operating system, it is therefore possible to find -out basic properties of a device (such as e.g. the manufacturer and the name -of the device) without a device-specific driver. This is essential because -the operating system can choose a driver to load based on this information -(Plug-And-Play). - -Among the most important properties in the Device Descriptor are the USB -Vendor- and Product-ID. Both are 16 bit integers. The most simple form of -driver matching is based on these IDs. The driver announces the Vendor- and -Product-IDs of the devices it can handle and the operating system loads the -appropriate driver when the device is connected. - -It is obvious that this technique only works if the pair Vendor- plus -Product-ID is unique: Only devices which require the same driver can have the -same pair of IDs. - - -===================================================== -HOW DOES THE USB STANDARD ENSURE THAT IDs ARE UNIQUE? -===================================================== - -Since it is so important that USB IDs are unique, the USB Implementers Forum, -Inc. (usb.org) needs a way to enforce this legally. It is not forbidden by -law to build a device and assign it any random numbers as IDs. Usb.org -therefore needs an agreement to regulate the use of USB IDs. The agreement -binds only parties who agreed to it, of course. Everybody else is free to use -any numbers for their IDs. - -So how can usb.org ensure that every manufacturer of USB devices enters into -an agreement with them? They do it via trademark licensing. Usb.org has -registered the trademark "USB", all associated logos and related terms. If -you want to put an USB logo on your product or claim that it is USB -compliant, you must license these trademarks from usb.org. And this is where -you enter into an agreement. See the "USB-IF Trademark License Agreement and -Usage Guidelines for the USB-IF Logo" at -http://www.usb.org/developers/logo_license/. - -Licensing the USB trademarks requires that you buy a USB Vendor-ID from -usb.org (one-time fee of ca. 2,000 USD), that you become a member of usb.org -(yearly fee of ca. 4,000 USD) and that you meet all the technical -specifications from the USB spec. - -This means that most hobbyists and small companies will never be able to -become USB compliant, just because membership is so expensive. And you can't -be compliant with a driver based on V-USB anyway, because the AVR's port pins -don't meet the electrical specifications for USB. So, in principle, all -hobbyists and small companies are free to choose any random numbers for their -IDs. They have nothing to lose... - -There is one exception worth noting, though: If you use a sub-component which -implements USB, the vendor of the sub-components may guarantee USB -compliance. This might apply to some or all of FTDI's solutions. - - -======================================================================= -WHY SHOULD YOU OBTAIN USB IDs EVEN IF YOU DON'T LICENSE USB TRADEMARKS? -======================================================================= - -You have learned in the previous section that you are free to choose any -numbers for your IDs anyway. So why not do exactly this? There is still the -technical issue. If you choose IDs which are already in use by somebody else, -operating systems will load the wrong drivers and your device won't work. -Even if you choose IDs which are not currently in use, they may be in use in -the next version of the operating system or even after an automatic update. - -So what you need is a pair of Vendor- and Product-IDs for which you have the -guarantee that no USB compliant product uses them. This implies that no -operating system will ever ship with drivers responsible for these IDs. - - -============================================== -HOW DOES OBJECTIVE DEVELOPMENT HANDLE USB IDs? -============================================== - -Objective Development gives away pairs of USB-IDs with their V-USB licenses. -In order to ensure that these IDs are unique, Objective Development has an -agreement with the company/person who has bought the USB Vendor-ID from -usb.org. This agreement ensures that a range of USB Product-IDs is reserved -for assignment by Objective Development and that the owner of the Vendor-ID -won't give it to anybody else. - -This means that you have to trust three parties to ensure uniqueness of -your IDs: - - - Objective Development, that they don't give the same PID to more than - one person. - - The owner of the Vendor-ID that they don't assign PIDs from the range - assigned to Objective Development to anybody else. - - Usb.org that they don't assign the same Vendor-ID a second time. - - -================================== -WHO IS THE OWNER OF THE VENDOR-ID? -================================== - -Objective Development has obtained ranges of USB Product-IDs under two -Vendor-IDs: Under Vendor-ID 5824 from Wouter van Ooijen (Van Ooijen -Technische Informatica, www.voti.nl) and under Vendor-ID 8352 from Jason -Kotzin (now flirc.tv, Inc.). Both VID owners have received their Vendor-ID -directly from usb.org. - - -========================================================================= -CAN I USE USB-IDs FROM OBJECTIVE DEVELOPMENT WITH OTHER DRIVERS/HARDWARE? -========================================================================= - -The short answer is: Yes. All you get is a guarantee that the IDs are never -assigned to anybody else. What more do you need? - - -============================ -WHAT ABOUT SHARED ID PAIRS? -============================ - -Objective Development has reserved some PID/VID pairs for shared use. You -have no guarantee of uniqueness for them, except that no USB compliant device -uses them. In order to avoid technical problems, we must ensure that all -devices with the same pair of IDs use the same driver on kernel level. For -details, see the file USB-IDs-for-free.txt. - - -====================================================== -I HAVE HEARD THAT SUB-LICENSING OF USB-IDs IS ILLEGAL? -====================================================== - -A 16 bit integer number cannot be protected by copyright laws. It is not -sufficiently complex. And since none of the parties involved entered into the -USB-IF Trademark License Agreement, we are not bound by this agreement. So -there is no reason why it should be illegal to sub-license USB-IDs. - - -============================================= -WHO IS LIABLE IF THERE ARE INCOMPATIBILITIES? -============================================= - -Objective Development disclaims all liabilities which might arise from the -assignment of IDs. If you guarantee product features to your customers -without proper disclaimer, YOU are liable for that. diff --git a/usbdrv/USB-IDs-for-free.txt b/usbdrv/USB-IDs-for-free.txt deleted file mode 100644 index d46517d..0000000 --- a/usbdrv/USB-IDs-for-free.txt +++ /dev/null @@ -1,154 +0,0 @@ -Version 2009-08-22 - -=========================== -FREE USB-IDs FOR SHARED USE -=========================== - -Objective Development has reserved a set of USB Product-IDs for use according -to the guidelines outlined below. For more information about the concept of -USB IDs please see the file USB-ID-FAQ.txt. Objective Development guarantees -that the IDs listed below are not used by any USB compliant devices. - - -==================== -MECHANISM OF SHARING -==================== - -From a technical point of view, two different devices can share the same USB -Vendor- and Product-ID if they require the same driver on operating system -level. We make use of this fact by assigning separate IDs for various device -classes. On application layer, devices must be distinguished by their textual -name or serial number. We offer separate sets of IDs for discrimination by -textual name and for serial number. - -Examples for shared use of USB IDs are included with V-USB in the "examples" -subdirectory. - - -====================================== -IDs FOR DISCRIMINATION BY TEXTUAL NAME -====================================== - -If you use one of the IDs listed below, your device and host-side software -must conform to these rules: - -(1) The USB device MUST provide a textual representation of the manufacturer -and product identification. The manufacturer identification MUST be available -at least in USB language 0x0409 (English/US). - -(2) The textual manufacturer identification MUST contain either an Internet -domain name (e.g. "mycompany.com") registered and owned by you, or an e-mail -address under your control (e.g. "myname@gmx.net"). You can embed the domain -name or e-mail address in any string you like, e.g. "Objective Development -http://www.obdev.at/vusb/". - -(3) You are responsible for retaining ownership of the domain or e-mail -address for as long as any of your products are in use. - -(4) You may choose any string for the textual product identification, as long -as this string is unique within the scope of your textual manufacturer -identification. - -(5) Application side device look-up MUST be based on the textual manufacturer -and product identification in addition to VID/PID matching. The driver -matching MUST be a comparison of the entire strings, NOT a sub-string match. - -(6) For devices which implement a particular USB device class (e.g. HID), the -operating system's default class driver MUST be used. If an operating system -driver for Vendor Class devices is needed, this driver must be libusb or -libusb-win32 (see http://libusb.org/ and -http://libusb-win32.sourceforge.net/). - -Table if IDs for discrimination by textual name: - -PID dec (hex) | VID dec (hex) | Description of use -==============+===============+============================================ -1500 (0x05dc) | 5824 (0x16c0) | For Vendor Class devices with libusb ---------------+---------------+-------------------------------------------- -1503 (0x05df) | 5824 (0x16c0) | For generic HID class devices (which are - | | NOT mice, keyboards or joysticks) ---------------+---------------+-------------------------------------------- -1505 (0x05e1) | 5824 (0x16c0) | For CDC-ACM class devices (modems) ---------------+---------------+-------------------------------------------- -1508 (0x05e4) | 5824 (0x16c0) | For MIDI class devices ---------------+---------------+-------------------------------------------- - -Note that Windows caches the textual product- and vendor-description for -mice, keyboards and joysticks. Name-bsed discrimination is therefore not -recommended for these device classes. - - -======================================= -IDs FOR DISCRIMINATION BY SERIAL NUMBER -======================================= - -If you use one of the IDs listed below, your device and host-side software -must conform to these rules: - -(1) The USB device MUST provide a textual representation of the serial -number, unless ONLY the operating system's default class driver is used. -The serial number string MUST be available at least in USB language 0x0409 -(English/US). - -(2) The serial number MUST start with either an Internet domain name (e.g. -"mycompany.com") registered and owned by you, or an e-mail address under your -control (e.g. "myname@gmx.net"), both terminated with a colon (":") character. -You MAY append any string you like for further discrimination of your devices. - -(3) You are responsible for retaining ownership of the domain or e-mail -address for as long as any of your products are in use. - -(5) Application side device look-up MUST be based on the serial number string -in addition to VID/PID matching. The matching must start at the first -character of the serial number string and include the colon character -terminating your domain or e-mail address. It MAY stop anywhere after that. - -(6) For devices which implement a particular USB device class (e.g. HID), the -operating system's default class driver MUST be used. If an operating system -driver for Vendor Class devices is needed, this driver must be libusb or -libusb-win32 (see http://libusb.org/ and -http://libusb-win32.sourceforge.net/). - -(7) If ONLY the operating system's default class driver is used, e.g. for -mice, keyboards, joysticks, CDC or MIDI devices and no discrimination by an -application is needed, the serial number may be omitted. - - -Table if IDs for discrimination by serial number string: - -PID dec (hex) | VID dec (hex) | Description of use -===============+===============+=========================================== -10200 (0x27d8) | 5824 (0x16c0) | For Vendor Class devices with libusb ----------------+---------------+------------------------------------------- -10201 (0x27d9) | 5824 (0x16c0) | For generic HID class devices (which are - | | NOT mice, keyboards or joysticks) ----------------+---------------+------------------------------------------- -10202 (0x27da) | 5824 (0x16c0) | For USB Mice ----------------+---------------+------------------------------------------- -10203 (0x27db) | 5824 (0x16c0) | For USB Keyboards ----------------+---------------+------------------------------------------- -10204 (0x27dc) | 5824 (0x16c0) | For USB Joysticks ----------------+---------------+------------------------------------------- -10205 (0x27dd) | 5824 (0x16c0) | For CDC-ACM class devices (modems) ----------------+---------------+------------------------------------------- -10206 (0x27de) | 5824 (0x16c0) | For MIDI class devices ----------------+---------------+------------------------------------------- - - -================= -ORIGIN OF USB-IDs -================= - -OBJECTIVE DEVELOPMENT Software GmbH has obtained all VID/PID pairs listed -here from Wouter van Ooijen (see www.voti.nl) for exclusive disposition. -Wouter van Ooijen has obtained the VID from the USB Implementers Forum, Inc. -(see www.usb.org). The VID is registered for the company name "Van Ooijen -Technische Informatica". - - -========== -DISCLAIMER -========== - -OBJECTIVE DEVELOPMENT Software GmbH disclaims all liability for any -problems which are caused by the shared use of these VID/PID pairs. diff --git a/usbdrv/asmcommon.inc b/usbdrv/asmcommon.inc deleted file mode 100644 index d2a4f7c..0000000 --- a/usbdrv/asmcommon.inc +++ /dev/null @@ -1,187 +0,0 @@ -/* Name: asmcommon.inc - * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers - * Author: Christian Starkjohann - * Creation Date: 2007-11-05 - * Tabsize: 4 - * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - */ - -/* Do not link this file! Link usbdrvasm.S instead, which includes the - * appropriate implementation! - */ - -/* -General Description: -This file contains assembler code which is shared among the USB driver -implementations for different CPU cocks. Since the code must be inserted -in the middle of the module, it's split out into this file and #included. - -Jump destinations called from outside: - sofError: Called when no start sequence was found. - se0: Called when a package has been successfully received. - overflow: Called when receive buffer overflows. - doReturn: Called after sending data. - -Outside jump destinations used by this module: - waitForJ: Called to receive an already arriving packet. - sendAckAndReti: - sendNakAndReti: - sendCntAndReti: - usbSendAndReti: - -The following macros must be defined before this file is included: - .macro POP_STANDARD - .endm - .macro POP_RETI - .endm -*/ - -#define token x1 - -overflow: - ldi x2, 1< 0 - -#warning "Never compile production devices with debugging enabled" - -static void uartPutc(char c) -{ - while(!(ODDBG_USR & (1 << ODDBG_UDRE))); /* wait for data register empty */ - ODDBG_UDR = c; -} - -static uchar hexAscii(uchar h) -{ - h &= 0xf; - if(h >= 10) - h += 'a' - (uchar)10 - '0'; - h += '0'; - return h; -} - -static void printHex(uchar c) -{ - uartPutc(hexAscii(c >> 4)); - uartPutc(hexAscii(c)); -} - -void odDebug(uchar prefix, uchar *data, uchar len) -{ - printHex(prefix); - uartPutc(':'); - while(len--){ - uartPutc(' '); - printHex(*data++); - } - uartPutc('\r'); - uartPutc('\n'); -} - -#endif diff --git a/usbdrv/oddebug.h b/usbdrv/oddebug.h deleted file mode 100644 index 851f84d..0000000 --- a/usbdrv/oddebug.h +++ /dev/null @@ -1,122 +0,0 @@ -/* Name: oddebug.h - * Project: AVR library - * Author: Christian Starkjohann - * Creation Date: 2005-01-16 - * Tabsize: 4 - * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - */ - -#ifndef __oddebug_h_included__ -#define __oddebug_h_included__ - -/* -General Description: -This module implements a function for debug logs on the serial line of the -AVR microcontroller. Debugging can be configured with the define -'DEBUG_LEVEL'. If this macro is not defined or defined to 0, all debugging -calls are no-ops. If it is 1, DBG1 logs will appear, but not DBG2. If it is -2, DBG1 and DBG2 logs will be printed. - -A debug log consists of a label ('prefix') to indicate which debug log created -the output and a memory block to dump in hex ('data' and 'len'). -*/ - - -#ifndef F_CPU -# define F_CPU 12000000 /* 12 MHz */ -#endif - -/* make sure we have the UART defines: */ -#include "usbportability.h" - -#ifndef uchar -# define uchar unsigned char -#endif - -#if DEBUG_LEVEL > 0 && !(defined TXEN || defined TXEN0) /* no UART in device */ -# warning "Debugging disabled because device has no UART" -# undef DEBUG_LEVEL -#endif - -#ifndef DEBUG_LEVEL -# define DEBUG_LEVEL 0 -#endif - -/* ------------------------------------------------------------------------- */ - -#if DEBUG_LEVEL > 0 -# define DBG1(prefix, data, len) odDebug(prefix, data, len) -#else -# define DBG1(prefix, data, len) -#endif - -#if DEBUG_LEVEL > 1 -# define DBG2(prefix, data, len) odDebug(prefix, data, len) -#else -# define DBG2(prefix, data, len) -#endif - -/* ------------------------------------------------------------------------- */ - -#if DEBUG_LEVEL > 0 -extern void odDebug(uchar prefix, uchar *data, uchar len); - -/* Try to find our control registers; ATMEL likes to rename these */ - -#if defined UBRR -# define ODDBG_UBRR UBRR -#elif defined UBRRL -# define ODDBG_UBRR UBRRL -#elif defined UBRR0 -# define ODDBG_UBRR UBRR0 -#elif defined UBRR0L -# define ODDBG_UBRR UBRR0L -#endif - -#if defined UCR -# define ODDBG_UCR UCR -#elif defined UCSRB -# define ODDBG_UCR UCSRB -#elif defined UCSR0B -# define ODDBG_UCR UCSR0B -#endif - -#if defined TXEN -# define ODDBG_TXEN TXEN -#else -# define ODDBG_TXEN TXEN0 -#endif - -#if defined USR -# define ODDBG_USR USR -#elif defined UCSRA -# define ODDBG_USR UCSRA -#elif defined UCSR0A -# define ODDBG_USR UCSR0A -#endif - -#if defined UDRE -# define ODDBG_UDRE UDRE -#else -# define ODDBG_UDRE UDRE0 -#endif - -#if defined UDR -# define ODDBG_UDR UDR -#elif defined UDR0 -# define ODDBG_UDR UDR0 -#endif - -static inline void odDebugInit(void) -{ - ODDBG_UCR |= (1<len & 0x10){ /* packet buffer was empty */ - txStatus->buffer[0] ^= USBPID_DATA0 ^ USBPID_DATA1; /* toggle token */ - }else{ - txStatus->len = USBPID_NAK; /* avoid sending outdated (overwritten) interrupt data */ - } - p = txStatus->buffer + 1; - i = len; - do{ /* if len == 0, we still copy 1 byte, but that's no problem */ - *p++ = *data++; - }while(--i > 0); /* loop control at the end is 2 bytes shorter than at beginning */ - usbCrc16Append(&txStatus->buffer[1], len); - txStatus->len = len + 4; /* len must be given including sync byte */ - DBG2(0x21 + (((int)txStatus >> 3) & 3), txStatus->buffer, len + 3); -} - -USB_PUBLIC void usbSetInterrupt(uchar *data, uchar len) -{ - usbGenericSetInterrupt(data, len, &usbTxStatus1); -} -#endif - -#if USB_CFG_HAVE_INTRIN_ENDPOINT3 -USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len) -{ - usbGenericSetInterrupt(data, len, &usbTxStatus3); -} -#endif -#endif /* USB_CFG_SUPPRESS_INTR_CODE */ - -/* ------------------ utilities for code following below ------------------- */ - -/* Use defines for the switch statement so that we can choose between an - * if()else if() and a switch/case based implementation. switch() is more - * efficient for a LARGE set of sequential choices, if() is better in all other - * cases. - */ -#if USB_CFG_USE_SWITCH_STATEMENT -# define SWITCH_START(cmd) switch(cmd){{ -# define SWITCH_CASE(value) }break; case (value):{ -# define SWITCH_CASE2(v1,v2) }break; case (v1): case(v2):{ -# define SWITCH_CASE3(v1,v2,v3) }break; case (v1): case(v2): case(v3):{ -# define SWITCH_DEFAULT }break; default:{ -# define SWITCH_END }} -#else -# define SWITCH_START(cmd) {uchar _cmd = cmd; if(0){ -# define SWITCH_CASE(value) }else if(_cmd == (value)){ -# define SWITCH_CASE2(v1,v2) }else if(_cmd == (v1) || _cmd == (v2)){ -# define SWITCH_CASE3(v1,v2,v3) }else if(_cmd == (v1) || _cmd == (v2) || (_cmd == v3)){ -# define SWITCH_DEFAULT }else{ -# define SWITCH_END }} -#endif - -#ifndef USB_RX_USER_HOOK -#define USB_RX_USER_HOOK(data, len) -#endif -#ifndef USB_SET_ADDRESS_HOOK -#define USB_SET_ADDRESS_HOOK() -#endif - -/* ------------------------------------------------------------------------- */ - -/* We use if() instead of #if in the macro below because #if can't be used - * in macros and the compiler optimizes constant conditions anyway. - * This may cause problems with undefined symbols if compiled without - * optimizing! - */ -#define GET_DESCRIPTOR(cfgProp, staticName) \ - if(cfgProp){ \ - if((cfgProp) & USB_PROP_IS_RAM) \ - flags = 0; \ - if((cfgProp) & USB_PROP_IS_DYNAMIC){ \ - len = usbFunctionDescriptor(rq); \ - }else{ \ - len = USB_PROP_LENGTH(cfgProp); \ - usbMsgPtr = (usbMsgPtr_t)(staticName); \ - } \ - } - -/* usbDriverDescriptor() is similar to usbFunctionDescriptor(), but used - * internally for all types of descriptors. - */ -static inline usbMsgLen_t usbDriverDescriptor(usbRequest_t *rq) -{ -usbMsgLen_t len = 0; -uchar flags = USB_FLG_MSGPTR_IS_ROM; - - SWITCH_START(rq->wValue.bytes[1]) - SWITCH_CASE(USBDESCR_DEVICE) /* 1 */ - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_DEVICE, usbDescriptorDevice) - SWITCH_CASE(USBDESCR_CONFIG) /* 2 */ - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_CONFIGURATION, usbDescriptorConfiguration) - SWITCH_CASE(USBDESCR_STRING) /* 3 */ -#if USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC - if(USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_RAM) - flags = 0; - len = usbFunctionDescriptor(rq); -#else /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */ - SWITCH_START(rq->wValue.bytes[0]) - SWITCH_CASE(0) - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_0, usbDescriptorString0) - SWITCH_CASE(1) - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_VENDOR, usbDescriptorStringVendor) - SWITCH_CASE(2) - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_PRODUCT, usbDescriptorStringDevice) - SWITCH_CASE(3) - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER, usbDescriptorStringSerialNumber) - SWITCH_DEFAULT - if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){ - len = usbFunctionDescriptor(rq); - } - SWITCH_END -#endif /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */ -#if USB_CFG_DESCR_PROPS_HID_REPORT /* only support HID descriptors if enabled */ - SWITCH_CASE(USBDESCR_HID) /* 0x21 */ - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID, usbDescriptorConfiguration + 18) - SWITCH_CASE(USBDESCR_HID_REPORT)/* 0x22 */ - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID_REPORT, usbDescriptorHidReport) -#endif - SWITCH_DEFAULT - if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){ - len = usbFunctionDescriptor(rq); - } - SWITCH_END - usbMsgFlags = flags; - return len; -} - -/* ------------------------------------------------------------------------- */ - -/* usbDriverSetup() is similar to usbFunctionSetup(), but it's used for - * standard requests instead of class and custom requests. - */ -static inline usbMsgLen_t usbDriverSetup(usbRequest_t *rq) -{ -usbMsgLen_t len = 0; -uchar *dataPtr = usbTxBuf + 9; /* there are 2 bytes free space at the end of the buffer */ -uchar value = rq->wValue.bytes[0]; -#if USB_CFG_IMPLEMENT_HALT -uchar index = rq->wIndex.bytes[0]; -#endif - - dataPtr[0] = 0; /* default reply common to USBRQ_GET_STATUS and USBRQ_GET_INTERFACE */ - SWITCH_START(rq->bRequest) - SWITCH_CASE(USBRQ_GET_STATUS) /* 0 */ - uchar recipient = rq->bmRequestType & USBRQ_RCPT_MASK; /* assign arith ops to variables to enforce byte size */ - if(USB_CFG_IS_SELF_POWERED && recipient == USBRQ_RCPT_DEVICE) - dataPtr[0] = USB_CFG_IS_SELF_POWERED; -#if USB_CFG_IMPLEMENT_HALT - if(recipient == USBRQ_RCPT_ENDPOINT && index == 0x81) /* request status for endpoint 1 */ - dataPtr[0] = usbTxLen1 == USBPID_STALL; -#endif - dataPtr[1] = 0; - len = 2; -#if USB_CFG_IMPLEMENT_HALT - SWITCH_CASE2(USBRQ_CLEAR_FEATURE, USBRQ_SET_FEATURE) /* 1, 3 */ - if(value == 0 && index == 0x81){ /* feature 0 == HALT for endpoint == 1 */ - usbTxLen1 = rq->bRequest == USBRQ_CLEAR_FEATURE ? USBPID_NAK : USBPID_STALL; - usbResetDataToggling(); - } -#endif - SWITCH_CASE(USBRQ_SET_ADDRESS) /* 5 */ - usbNewDeviceAddr = value; - USB_SET_ADDRESS_HOOK(); - SWITCH_CASE(USBRQ_GET_DESCRIPTOR) /* 6 */ - len = usbDriverDescriptor(rq); - goto skipMsgPtrAssignment; - SWITCH_CASE(USBRQ_GET_CONFIGURATION) /* 8 */ - dataPtr = &usbConfiguration; /* send current configuration value */ - len = 1; - SWITCH_CASE(USBRQ_SET_CONFIGURATION) /* 9 */ - usbConfiguration = value; - usbResetStall(); - SWITCH_CASE(USBRQ_GET_INTERFACE) /* 10 */ - len = 1; -#if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE - SWITCH_CASE(USBRQ_SET_INTERFACE) /* 11 */ - usbResetDataToggling(); - usbResetStall(); -#endif - SWITCH_DEFAULT /* 7=SET_DESCRIPTOR, 12=SYNC_FRAME */ - /* Should we add an optional hook here? */ - SWITCH_END - usbMsgPtr = (usbMsgPtr_t)dataPtr; -skipMsgPtrAssignment: - return len; -} - -/* ------------------------------------------------------------------------- */ - -/* usbProcessRx() is called for every message received by the interrupt - * routine. It distinguishes between SETUP and DATA packets and processes - * them accordingly. - */ -static inline void usbProcessRx(uchar *data, uchar len) -{ -usbRequest_t *rq = (void *)data; - -/* usbRxToken can be: - * 0x2d 00101101 (USBPID_SETUP for setup data) - * 0xe1 11100001 (USBPID_OUT: data phase of setup transfer) - * 0...0x0f for OUT on endpoint X - */ - DBG2(0x10 + (usbRxToken & 0xf), data, len + 2); /* SETUP=1d, SETUP-DATA=11, OUTx=1x */ - USB_RX_USER_HOOK(data, len) -#if USB_CFG_IMPLEMENT_FN_WRITEOUT - if(usbRxToken < 0x10){ /* OUT to endpoint != 0: endpoint number in usbRxToken */ - usbFunctionWriteOut(data, len); - return; - } -#endif - if(usbRxToken == (uchar)USBPID_SETUP){ - if(len != 8) /* Setup size must be always 8 bytes. Ignore otherwise. */ - return; - usbMsgLen_t replyLen; - usbTxBuf[0] = USBPID_DATA0; /* initialize data toggling */ - usbTxLen = USBPID_NAK; /* abort pending transmit */ - usbMsgFlags = 0; - uchar type = rq->bmRequestType & USBRQ_TYPE_MASK; - if(type != USBRQ_TYPE_STANDARD){ /* standard requests are handled by driver */ - replyLen = usbFunctionSetup(data); - }else{ - replyLen = usbDriverSetup(rq); - } -#if USB_CFG_IMPLEMENT_FN_READ || USB_CFG_IMPLEMENT_FN_WRITE - if(replyLen == USB_NO_MSG){ /* use user-supplied read/write function */ - /* do some conditioning on replyLen, but on IN transfers only */ - if((rq->bmRequestType & USBRQ_DIR_MASK) != USBRQ_DIR_HOST_TO_DEVICE){ - if(sizeof(replyLen) < sizeof(rq->wLength.word)){ /* help compiler with optimizing */ - replyLen = rq->wLength.bytes[0]; - }else{ - replyLen = rq->wLength.word; - } - } - usbMsgFlags = USB_FLG_USE_USER_RW; - }else /* The 'else' prevents that we limit a replyLen of USB_NO_MSG to the maximum transfer len. */ -#endif - if(sizeof(replyLen) < sizeof(rq->wLength.word)){ /* help compiler with optimizing */ - if(!rq->wLength.bytes[1] && replyLen > rq->wLength.bytes[0]) /* limit length to max */ - replyLen = rq->wLength.bytes[0]; - }else{ - if(replyLen > rq->wLength.word) /* limit length to max */ - replyLen = rq->wLength.word; - } - usbMsgLen = replyLen; - }else{ /* usbRxToken must be USBPID_OUT, which means data phase of setup (control-out) */ -#if USB_CFG_IMPLEMENT_FN_WRITE - if(usbMsgFlags & USB_FLG_USE_USER_RW){ - uchar rval = usbFunctionWrite(data, len); - if(rval == 0xff){ /* an error occurred */ - usbTxLen = USBPID_STALL; - }else if(rval != 0){ /* This was the final package */ - usbMsgLen = 0; /* answer with a zero-sized data packet */ - } - } -#endif - } -} - -/* ------------------------------------------------------------------------- */ - -/* This function is similar to usbFunctionRead(), but it's also called for - * data handled automatically by the driver (e.g. descriptor reads). - */ -static uchar usbDeviceRead(uchar *data, uchar len) -{ - if(len > 0){ /* don't bother app with 0 sized reads */ -#if USB_CFG_IMPLEMENT_FN_READ - if(usbMsgFlags & USB_FLG_USE_USER_RW){ - len = usbFunctionRead(data, len); - }else -#endif - { - uchar i = len; - usbMsgPtr_t r = usbMsgPtr; - if(usbMsgFlags & USB_FLG_MSGPTR_IS_ROM){ /* ROM data */ - do{ - uchar c = USB_READ_FLASH(r); /* assign to char size variable to enforce byte ops */ - *data++ = c; - r++; - }while(--i); - }else{ /* RAM data */ - do{ - *data++ = *((uchar *)r); - r++; - }while(--i); - } - usbMsgPtr = r; - } - } - return len; -} - -/* ------------------------------------------------------------------------- */ - -/* usbBuildTxBlock() is called when we have data to transmit and the - * interrupt routine's transmit buffer is empty. - */ -static inline void usbBuildTxBlock(void) -{ -usbMsgLen_t wantLen; -uchar len; - - wantLen = usbMsgLen; - if(wantLen > 8) - wantLen = 8; - usbMsgLen -= wantLen; - usbTxBuf[0] ^= USBPID_DATA0 ^ USBPID_DATA1; /* DATA toggling */ - len = usbDeviceRead(usbTxBuf + 1, wantLen); - if(len <= 8){ /* valid data packet */ - usbCrc16Append(&usbTxBuf[1], len); - len += 4; /* length including sync byte */ - if(len < 12) /* a partial package identifies end of message */ - usbMsgLen = USB_NO_MSG; - }else{ - len = USBPID_STALL; /* stall the endpoint */ - usbMsgLen = USB_NO_MSG; - } - usbTxLen = len; - DBG2(0x20, usbTxBuf, len-1); -} - -/* ------------------------------------------------------------------------- */ - -static inline void usbHandleResetHook(uchar notResetState) -{ -#ifdef USB_RESET_HOOK -static uchar wasReset; -uchar isReset = !notResetState; - - if(wasReset != isReset){ - USB_RESET_HOOK(isReset); - wasReset = isReset; - } -#else - notResetState = notResetState; // avoid compiler warning -#endif -} - -/* ------------------------------------------------------------------------- */ - -USB_PUBLIC void usbPoll(void) -{ -schar len; -uchar i; - - len = usbRxLen - 3; - if(len >= 0){ -/* We could check CRC16 here -- but ACK has already been sent anyway. If you - * need data integrity checks with this driver, check the CRC in your app - * code and report errors back to the host. Since the ACK was already sent, - * retries must be handled on application level. - * unsigned crc = usbCrc16(buffer + 1, usbRxLen - 3); - */ - usbProcessRx(usbRxBuf + USB_BUFSIZE + 1 - usbInputBufOffset, len); -#if USB_CFG_HAVE_FLOWCONTROL - if(usbRxLen > 0) /* only mark as available if not inactivated */ - usbRxLen = 0; -#else - usbRxLen = 0; /* mark rx buffer as available */ -#endif - } - if(usbTxLen & 0x10){ /* transmit system idle */ - if(usbMsgLen != USB_NO_MSG){ /* transmit data pending? */ - usbBuildTxBlock(); - } - } - for(i = 20; i > 0; i--){ - uchar usbLineStatus = USBIN & USBMASK; - if(usbLineStatus != 0) /* SE0 has ended */ - goto isNotReset; - } - /* RESET condition, called multiple times during reset */ - usbNewDeviceAddr = 0; - usbDeviceAddr = 0; - usbResetStall(); - DBG1(0xff, 0, 0); -isNotReset: - usbHandleResetHook(i); -} - -/* ------------------------------------------------------------------------- */ - -USB_PUBLIC void usbInit(void) -{ -#if USB_INTR_CFG_SET != 0 - USB_INTR_CFG |= USB_INTR_CFG_SET; -#endif -#if USB_INTR_CFG_CLR != 0 - USB_INTR_CFG &= ~(USB_INTR_CFG_CLR); -#endif - USB_INTR_ENABLE |= (1 << USB_INTR_ENABLE_BIT); - usbResetDataToggling(); -#if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE - usbTxLen1 = USBPID_NAK; -#if USB_CFG_HAVE_INTRIN_ENDPOINT3 - usbTxLen3 = USBPID_NAK; -#endif -#endif -} - -/* ------------------------------------------------------------------------- */ diff --git a/usbdrv/usbdrv.h b/usbdrv/usbdrv.h deleted file mode 100644 index 3fe84d5..0000000 --- a/usbdrv/usbdrv.h +++ /dev/null @@ -1,746 +0,0 @@ -/* Name: usbdrv.h - * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers - * Author: Christian Starkjohann - * Creation Date: 2004-12-29 - * Tabsize: 4 - * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - */ - -#ifndef __usbdrv_h_included__ -#define __usbdrv_h_included__ -#include "usbconfig.h" -#include "usbportability.h" - -/* -Hardware Prerequisites: -======================= -USB lines D+ and D- MUST be wired to the same I/O port. We recommend that D+ -triggers the interrupt (best achieved by using INT0 for D+), but it is also -possible to trigger the interrupt from D-. If D- is used, interrupts are also -triggered by SOF packets. D- requires a pull-up of 1.5k to +3.5V (and the -device must be powered at 3.5V) to identify as low-speed USB device. A -pull-down or pull-up of 1M SHOULD be connected from D+ to +3.5V to prevent -interference when no USB master is connected. If you use Zener diodes to limit -the voltage on D+ and D-, you MUST use a pull-down resistor, not a pull-up. -We use D+ as interrupt source and not D- because it does not trigger on -keep-alive and RESET states. If you want to count keep-alive events with -USB_COUNT_SOF, you MUST use D- as an interrupt source. - -As a compile time option, the 1.5k pull-up resistor on D- can be made -switchable to allow the device to disconnect at will. See the definition of -usbDeviceConnect() and usbDeviceDisconnect() further down in this file. - -Please adapt the values in usbconfig.h according to your hardware! - -The device MUST be clocked at exactly 12 MHz, 15 MHz, 16 MHz or 20 MHz -or at 12.8 MHz resp. 16.5 MHz +/- 1%. See usbconfig-prototype.h for details. - - -Limitations: -============ -Robustness with respect to communication errors: -The driver assumes error-free communication. It DOES check for errors in -the PID, but does NOT check bit stuffing errors, SE0 in middle of a byte, -token CRC (5 bit) and data CRC (16 bit). CRC checks can not be performed due -to timing constraints: We must start sending a reply within 7 bit times. -Bit stuffing and misplaced SE0 would have to be checked in real-time, but CPU -performance does not permit that. The driver does not check Data0/Data1 -toggling, but application software can implement the check. - -Input characteristics: -Since no differential receiver circuit is used, electrical interference -robustness may suffer. The driver samples only one of the data lines with -an ordinary I/O pin's input characteristics. However, since this is only a -low speed USB implementation and the specification allows for 8 times the -bit rate over the same hardware, we should be on the safe side. Even the spec -requires detection of asymmetric states at high bit rate for SE0 detection. - -Number of endpoints: -The driver supports the following endpoints: - -- Endpoint 0, the default control endpoint. -- Any number of interrupt- or bulk-out endpoints. The data is sent to - usbFunctionWriteOut() and USB_CFG_IMPLEMENT_FN_WRITEOUT must be defined - to 1 to activate this feature. The endpoint number can be found in the - global variable 'usbRxToken'. -- One default interrupt- or bulk-in endpoint. This endpoint is used for - interrupt- or bulk-in transfers which are not handled by any other endpoint. - You must define USB_CFG_HAVE_INTRIN_ENDPOINT in order to activate this - feature and call usbSetInterrupt() to send interrupt/bulk data. -- One additional interrupt- or bulk-in endpoint. This was endpoint 3 in - previous versions of this driver but can now be configured to any endpoint - number. You must define USB_CFG_HAVE_INTRIN_ENDPOINT3 in order to activate - this feature and call usbSetInterrupt3() to send interrupt/bulk data. The - endpoint number can be set with USB_CFG_EP3_NUMBER. - -Please note that the USB standard forbids bulk endpoints for low speed devices! -Most operating systems allow them anyway, but the AVR will spend 90% of the CPU -time in the USB interrupt polling for bulk data. - -Maximum data payload: -Data payload of control in and out transfers may be up to 254 bytes. In order -to accept payload data of out transfers, you need to implement -'usbFunctionWrite()'. - -USB Suspend Mode supply current: -The USB standard limits power consumption to 500uA when the bus is in suspend -mode. This is not a problem for self-powered devices since they don't need -bus power anyway. Bus-powered devices can achieve this only by putting the -CPU in sleep mode. The driver does not implement suspend handling by itself. -However, the application may implement activity monitoring and wakeup from -sleep. The host sends regular SE0 states on the bus to keep it active. These -SE0 states can be detected by using D- as the interrupt source. Define -USB_COUNT_SOF to 1 and use the global variable usbSofCount to check for bus -activity. - -Operation without an USB master: -The driver behaves neutral without connection to an USB master if D- reads -as 1. To avoid spurious interrupts, we recommend a high impedance (e.g. 1M) -pull-down or pull-up resistor on D+ (interrupt). If Zener diodes are used, -use a pull-down. If D- becomes statically 0, the driver may block in the -interrupt routine. - -Interrupt latency: -The application must ensure that the USB interrupt is not disabled for more -than 25 cycles (this is for 12 MHz, faster clocks allow longer latency). -This implies that all interrupt routines must either have the "ISR_NOBLOCK" -attribute set (see "avr/interrupt.h") or be written in assembler with "sei" -as the first instruction. - -Maximum interrupt duration / CPU cycle consumption: -The driver handles all USB communication during the interrupt service -routine. The routine will not return before an entire USB message is received -and the reply is sent. This may be up to ca. 1200 cycles @ 12 MHz (= 100us) if -the host conforms to the standard. The driver will consume CPU cycles for all -USB messages, even if they address another (low-speed) device on the same bus. - -*/ - -/* ------------------------------------------------------------------------- */ -/* --------------------------- Module Interface ---------------------------- */ -/* ------------------------------------------------------------------------- */ - -#define USBDRV_VERSION 20121206 -/* This define uniquely identifies a driver version. It is a decimal number - * constructed from the driver's release date in the form YYYYMMDD. If the - * driver's behavior or interface changes, you can use this constant to - * distinguish versions. If it is not defined, the driver's release date is - * older than 2006-01-25. - */ - - -#ifndef USB_PUBLIC -#define USB_PUBLIC -#endif -/* USB_PUBLIC is used as declaration attribute for all functions exported by - * the USB driver. The default is no attribute (see above). You may define it - * to static either in usbconfig.h or from the command line if you include - * usbdrv.c instead of linking against it. Including the C module of the driver - * directly in your code saves a couple of bytes in flash memory. - */ - -#ifndef __ASSEMBLER__ -#ifndef uchar -#define uchar unsigned char -#endif -#ifndef schar -#define schar signed char -#endif -/* shortcuts for well defined 8 bit integer types */ - -#if USB_CFG_LONG_TRANSFERS /* if more than 254 bytes transfer size required */ -# define usbMsgLen_t unsigned -#else -# define usbMsgLen_t uchar -#endif -/* usbMsgLen_t is the data type used for transfer lengths. By default, it is - * defined to uchar, allowing a maximum of 254 bytes (255 is reserved for - * USB_NO_MSG below). If the usbconfig.h defines USB_CFG_LONG_TRANSFERS to 1, - * a 16 bit data type is used, allowing up to 16384 bytes (the rest is used - * for flags in the descriptor configuration). - */ -#define USB_NO_MSG ((usbMsgLen_t)-1) /* constant meaning "no message" */ - -#ifndef usbMsgPtr_t -#define usbMsgPtr_t uchar * -#endif -/* Making usbMsgPtr_t a define allows the user of this library to define it to - * an 8 bit type on tiny devices. This reduces code size, especially if the - * compiler supports a tiny memory model. - * The type can be a pointer or scalar type, casts are made where necessary. - * Although it's paradoxical, Gcc 4 generates slightly better code for scalar - * types than for pointers. - */ - -struct usbRequest; /* forward declaration */ - -USB_PUBLIC void usbInit(void); -/* This function must be called before interrupts are enabled and the main - * loop is entered. We exepct that the PORT and DDR bits for D+ and D- have - * not been changed from their default status (which is 0). If you have changed - * them, set both back to 0 (configure them as input with no internal pull-up). - */ -USB_PUBLIC void usbPoll(void); -/* This function must be called at regular intervals from the main loop. - * Maximum delay between calls is somewhat less than 50ms (USB timeout for - * accepting a Setup message). Otherwise the device will not be recognized. - * Please note that debug outputs through the UART take ~ 0.5ms per byte - * at 19200 bps. - */ -extern usbMsgPtr_t usbMsgPtr; -/* This variable may be used to pass transmit data to the driver from the - * implementation of usbFunctionWrite(). It is also used internally by the - * driver for standard control requests. - */ -USB_PUBLIC usbMsgLen_t usbFunctionSetup(uchar data[8]); -/* This function is called when the driver receives a SETUP transaction from - * the host which is not answered by the driver itself (in practice: class and - * vendor requests). All control transfers start with a SETUP transaction where - * the host communicates the parameters of the following (optional) data - * transfer. The SETUP data is available in the 'data' parameter which can - * (and should) be casted to 'usbRequest_t *' for a more user-friendly access - * to parameters. - * - * If the SETUP indicates a control-in transfer, you should provide the - * requested data to the driver. There are two ways to transfer this data: - * (1) Set the global pointer 'usbMsgPtr' to the base of the static RAM data - * block and return the length of the data in 'usbFunctionSetup()'. The driver - * will handle the rest. Or (2) return USB_NO_MSG in 'usbFunctionSetup()'. The - * driver will then call 'usbFunctionRead()' when data is needed. See the - * documentation for usbFunctionRead() for details. - * - * If the SETUP indicates a control-out transfer, the only way to receive the - * data from the host is through the 'usbFunctionWrite()' call. If you - * implement this function, you must return USB_NO_MSG in 'usbFunctionSetup()' - * to indicate that 'usbFunctionWrite()' should be used. See the documentation - * of this function for more information. If you just want to ignore the data - * sent by the host, return 0 in 'usbFunctionSetup()'. - * - * Note that calls to the functions usbFunctionRead() and usbFunctionWrite() - * are only done if enabled by the configuration in usbconfig.h. - */ -USB_PUBLIC usbMsgLen_t usbFunctionDescriptor(struct usbRequest *rq); -/* You need to implement this function ONLY if you provide USB descriptors at - * runtime (which is an expert feature). It is very similar to - * usbFunctionSetup() above, but it is called only to request USB descriptor - * data. See the documentation of usbFunctionSetup() above for more info. - */ -#if USB_CFG_HAVE_INTRIN_ENDPOINT -USB_PUBLIC void usbSetInterrupt(uchar *data, uchar len); -/* This function sets the message which will be sent during the next interrupt - * IN transfer. The message is copied to an internal buffer and must not exceed - * a length of 8 bytes. The message may be 0 bytes long just to indicate the - * interrupt status to the host. - * If you need to transfer more bytes, use a control read after the interrupt. - */ -#define usbInterruptIsReady() (usbTxLen1 & 0x10) -/* This macro indicates whether the last interrupt message has already been - * sent. If you set a new interrupt message before the old was sent, the - * message already buffered will be lost. - */ -#if USB_CFG_HAVE_INTRIN_ENDPOINT3 -USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len); -#define usbInterruptIsReady3() (usbTxLen3 & 0x10) -/* Same as above for endpoint 3 */ -#endif -#endif /* USB_CFG_HAVE_INTRIN_ENDPOINT */ -#if USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH /* simplified interface for backward compatibility */ -#define usbHidReportDescriptor usbDescriptorHidReport -/* should be declared as: PROGMEM char usbHidReportDescriptor[]; */ -/* If you implement an HID device, you need to provide a report descriptor. - * The HID report descriptor syntax is a bit complex. If you understand how - * report descriptors are constructed, we recommend that you use the HID - * Descriptor Tool from usb.org, see http://www.usb.org/developers/hidpage/. - * Otherwise you should probably start with a working example. - */ -#endif /* USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH */ -#if USB_CFG_IMPLEMENT_FN_WRITE -USB_PUBLIC uchar usbFunctionWrite(uchar *data, uchar len); -/* This function is called by the driver to provide a control transfer's - * payload data (control-out). It is called in chunks of up to 8 bytes. The - * total count provided in the current control transfer can be obtained from - * the 'length' property in the setup data. If an error occurred during - * processing, return 0xff (== -1). The driver will answer the entire transfer - * with a STALL token in this case. If you have received the entire payload - * successfully, return 1. If you expect more data, return 0. If you don't - * know whether the host will send more data (you should know, the total is - * provided in the usbFunctionSetup() call!), return 1. - * NOTE: If you return 0xff for STALL, 'usbFunctionWrite()' may still be called - * for the remaining data. You must continue to return 0xff for STALL in these - * calls. - * In order to get usbFunctionWrite() called, define USB_CFG_IMPLEMENT_FN_WRITE - * to 1 in usbconfig.h and return 0xff in usbFunctionSetup().. - */ -#endif /* USB_CFG_IMPLEMENT_FN_WRITE */ -#if USB_CFG_IMPLEMENT_FN_READ -USB_PUBLIC uchar usbFunctionRead(uchar *data, uchar len); -/* This function is called by the driver to ask the application for a control - * transfer's payload data (control-in). It is called in chunks of up to 8 - * bytes each. You should copy the data to the location given by 'data' and - * return the actual number of bytes copied. If you return less than requested, - * the control-in transfer is terminated. If you return 0xff, the driver aborts - * the transfer with a STALL token. - * In order to get usbFunctionRead() called, define USB_CFG_IMPLEMENT_FN_READ - * to 1 in usbconfig.h and return 0xff in usbFunctionSetup().. - */ -#endif /* USB_CFG_IMPLEMENT_FN_READ */ - -extern uchar usbRxToken; /* may be used in usbFunctionWriteOut() below */ -#if USB_CFG_IMPLEMENT_FN_WRITEOUT -USB_PUBLIC void usbFunctionWriteOut(uchar *data, uchar len); -/* This function is called by the driver when data is received on an interrupt- - * or bulk-out endpoint. The endpoint number can be found in the global - * variable usbRxToken. You must define USB_CFG_IMPLEMENT_FN_WRITEOUT to 1 in - * usbconfig.h to get this function called. - */ -#endif /* USB_CFG_IMPLEMENT_FN_WRITEOUT */ -#ifdef USB_CFG_PULLUP_IOPORTNAME -#define usbDeviceConnect() ((USB_PULLUP_DDR |= (1<device, 1=device->host - * t ..... type: 0=standard, 1=class, 2=vendor, 3=reserved - * r ..... recipient: 0=device, 1=interface, 2=endpoint, 3=other - */ - -/* USB setup recipient values */ -#define USBRQ_RCPT_MASK 0x1f -#define USBRQ_RCPT_DEVICE 0 -#define USBRQ_RCPT_INTERFACE 1 -#define USBRQ_RCPT_ENDPOINT 2 - -/* USB request type values */ -#define USBRQ_TYPE_MASK 0x60 -#define USBRQ_TYPE_STANDARD (0<<5) -#define USBRQ_TYPE_CLASS (1<<5) -#define USBRQ_TYPE_VENDOR (2<<5) - -/* USB direction values: */ -#define USBRQ_DIR_MASK 0x80 -#define USBRQ_DIR_HOST_TO_DEVICE (0<<7) -#define USBRQ_DIR_DEVICE_TO_HOST (1<<7) - -/* USB Standard Requests */ -#define USBRQ_GET_STATUS 0 -#define USBRQ_CLEAR_FEATURE 1 -#define USBRQ_SET_FEATURE 3 -#define USBRQ_SET_ADDRESS 5 -#define USBRQ_GET_DESCRIPTOR 6 -#define USBRQ_SET_DESCRIPTOR 7 -#define USBRQ_GET_CONFIGURATION 8 -#define USBRQ_SET_CONFIGURATION 9 -#define USBRQ_GET_INTERFACE 10 -#define USBRQ_SET_INTERFACE 11 -#define USBRQ_SYNCH_FRAME 12 - -/* USB descriptor constants */ -#define USBDESCR_DEVICE 1 -#define USBDESCR_CONFIG 2 -#define USBDESCR_STRING 3 -#define USBDESCR_INTERFACE 4 -#define USBDESCR_ENDPOINT 5 -#define USBDESCR_HID 0x21 -#define USBDESCR_HID_REPORT 0x22 -#define USBDESCR_HID_PHYS 0x23 - -//#define USBATTR_BUSPOWER 0x80 // USB 1.1 does not define this value any more -#define USBATTR_BUSPOWER 0 -#define USBATTR_SELFPOWER 0x40 -#define USBATTR_REMOTEWAKE 0x20 - -/* USB HID Requests */ -#define USBRQ_HID_GET_REPORT 0x01 -#define USBRQ_HID_GET_IDLE 0x02 -#define USBRQ_HID_GET_PROTOCOL 0x03 -#define USBRQ_HID_SET_REPORT 0x09 -#define USBRQ_HID_SET_IDLE 0x0a -#define USBRQ_HID_SET_PROTOCOL 0x0b - -/* ------------------------------------------------------------------------- */ - -#endif /* __usbdrv_h_included__ */ diff --git a/usbdrv/usbdrvasm.S b/usbdrv/usbdrvasm.S deleted file mode 100644 index 32ce8ef..0000000 --- a/usbdrv/usbdrvasm.S +++ /dev/null @@ -1,392 +0,0 @@ -/* Name: usbdrvasm.S - * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers - * Author: Christian Starkjohann - * Creation Date: 2007-06-13 - * Tabsize: 4 - * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - */ - -/* -General Description: -This module is the assembler part of the USB driver. This file contains -general code (preprocessor acrobatics and CRC computation) and then includes -the file appropriate for the given clock rate. -*/ - -#define __SFR_OFFSET 0 /* used by avr-libc's register definitions */ -#include "usbportability.h" -#include "usbdrv.h" /* for common defs */ - -/* register names */ -#define x1 r16 -#define x2 r17 -#define shift r18 -#define cnt r19 -#define x3 r20 -#define x4 r21 -#define x5 r22 -#define bitcnt x5 -#define phase x4 -#define leap x4 - -/* Some assembler dependent definitions and declarations: */ - -#ifdef __IAR_SYSTEMS_ASM__ - extern usbRxBuf, usbDeviceAddr, usbNewDeviceAddr, usbInputBufOffset - extern usbCurrentTok, usbRxLen, usbRxToken, usbTxLen - extern usbTxBuf, usbTxStatus1, usbTxStatus3 -# if USB_COUNT_SOF - extern usbSofCount -# endif - public usbCrc16 - public usbCrc16Append - - COMMON INTVEC -# ifndef USB_INTR_VECTOR - ORG INT0_vect -# else /* USB_INTR_VECTOR */ - ORG USB_INTR_VECTOR -# undef USB_INTR_VECTOR -# endif /* USB_INTR_VECTOR */ -# define USB_INTR_VECTOR usbInterruptHandler - rjmp USB_INTR_VECTOR - RSEG CODE - -#else /* __IAR_SYSTEMS_ASM__ */ - -# ifndef USB_INTR_VECTOR /* default to hardware interrupt INT0 */ -# ifdef INT0_vect -# define USB_INTR_VECTOR INT0_vect // this is the "new" define for the vector -# else -# define USB_INTR_VECTOR SIG_INTERRUPT0 // this is the "old" vector -# endif -# endif - .text - .global USB_INTR_VECTOR - .type USB_INTR_VECTOR, @function - .global usbCrc16 - .global usbCrc16Append -#endif /* __IAR_SYSTEMS_ASM__ */ - - -#if USB_INTR_PENDING < 0x40 /* This is an I/O address, use in and out */ -# define USB_LOAD_PENDING(reg) in reg, USB_INTR_PENDING -# define USB_STORE_PENDING(reg) out USB_INTR_PENDING, reg -#else /* It's a memory address, use lds and sts */ -# define USB_LOAD_PENDING(reg) lds reg, USB_INTR_PENDING -# define USB_STORE_PENDING(reg) sts USB_INTR_PENDING, reg -#endif - -#define usbTxLen1 usbTxStatus1 -#define usbTxBuf1 (usbTxStatus1 + 1) -#define usbTxLen3 usbTxStatus3 -#define usbTxBuf3 (usbTxStatus3 + 1) - - -;---------------------------------------------------------------------------- -; Utility functions -;---------------------------------------------------------------------------- - -#ifdef __IAR_SYSTEMS_ASM__ -/* Register assignments for usbCrc16 on IAR cc */ -/* Calling conventions on IAR: - * First parameter passed in r16/r17, second in r18/r19 and so on. - * Callee must preserve r4-r15, r24-r29 (r28/r29 is frame pointer) - * Result is passed in r16/r17 - * In case of the "tiny" memory model, pointers are only 8 bit with no - * padding. We therefore pass argument 1 as "16 bit unsigned". - */ -RTMODEL "__rt_version", "3" -/* The line above will generate an error if cc calling conventions change. - * The value "3" above is valid for IAR 4.10B/W32 - */ -# define argLen r18 /* argument 2 */ -# define argPtrL r16 /* argument 1 */ -# define argPtrH r17 /* argument 1 */ - -# define resCrcL r16 /* result */ -# define resCrcH r17 /* result */ - -# define ptrL ZL -# define ptrH ZH -# define ptr Z -# define byte r22 -# define bitCnt r19 -# define polyL r20 -# define polyH r21 -# define scratch r23 - -#else /* __IAR_SYSTEMS_ASM__ */ -/* Register assignments for usbCrc16 on gcc */ -/* Calling conventions on gcc: - * First parameter passed in r24/r25, second in r22/23 and so on. - * Callee must preserve r1-r17, r28/r29 - * Result is passed in r24/r25 - */ -# define argLen r22 /* argument 2 */ -# define argPtrL r24 /* argument 1 */ -# define argPtrH r25 /* argument 1 */ - -# define resCrcL r24 /* result */ -# define resCrcH r25 /* result */ - -# define ptrL XL -# define ptrH XH -# define ptr x -# define byte r18 -# define bitCnt r19 -# define polyL r20 -# define polyH r21 -# define scratch r23 - -#endif - -#if USB_USE_FAST_CRC - -; This implementation is faster, but has bigger code size -; Thanks to Slawomir Fras (BoskiDialer) for this code! -; It implements the following C pseudo-code: -; unsigned table(unsigned char x) -; { -; unsigned value; -; -; value = (unsigned)x << 6; -; value ^= (unsigned)x << 7; -; if(parity(x)) -; value ^= 0xc001; -; return value; -; } -; unsigned usbCrc16(unsigned char *argPtr, unsigned char argLen) -; { -; unsigned crc = 0xffff; -; -; while(argLen--) -; crc = table(lo8(crc) ^ *argPtr++) ^ hi8(crc); -; return ~crc; -; } - -; extern unsigned usbCrc16(unsigned char *argPtr, unsigned char argLen); -; argPtr r24+25 / r16+r17 -; argLen r22 / r18 -; temp variables: -; byte r18 / r22 -; scratch r23 -; resCrc r24+r25 / r16+r17 -; ptr X / Z -usbCrc16: - mov ptrL, argPtrL - mov ptrH, argPtrH - ldi resCrcL, 0xFF - ldi resCrcH, 0xFF - rjmp usbCrc16LoopTest -usbCrc16ByteLoop: - ld byte, ptr+ - eor resCrcL, byte ; resCrcL is now 'x' in table() - mov byte, resCrcL ; compute parity of 'x' - swap byte - eor byte, resCrcL - mov scratch, byte - lsr byte - lsr byte - eor byte, scratch - inc byte - lsr byte - andi byte, 1 ; byte is now parity(x) - mov scratch, resCrcL - mov resCrcL, resCrcH - eor resCrcL, byte ; low byte of if(parity(x)) value ^= 0xc001; - neg byte - andi byte, 0xc0 - mov resCrcH, byte ; high byte of if(parity(x)) value ^= 0xc001; - clr byte - lsr scratch - ror byte - eor resCrcH, scratch - eor resCrcL, byte - lsr scratch - ror byte - eor resCrcH, scratch - eor resCrcL, byte -usbCrc16LoopTest: - subi argLen, 1 - brsh usbCrc16ByteLoop - com resCrcL - com resCrcH - ret - -#else /* USB_USE_FAST_CRC */ - -; This implementation is slower, but has less code size -; -; extern unsigned usbCrc16(unsigned char *argPtr, unsigned char argLen); -; argPtr r24+25 / r16+r17 -; argLen r22 / r18 -; temp variables: -; byte r18 / r22 -; bitCnt r19 -; poly r20+r21 -; scratch r23 -; resCrc r24+r25 / r16+r17 -; ptr X / Z -usbCrc16: - mov ptrL, argPtrL - mov ptrH, argPtrH - ldi resCrcL, 0 - ldi resCrcH, 0 - ldi polyL, lo8(0xa001) - ldi polyH, hi8(0xa001) - com argLen ; argLen = -argLen - 1: modified loop to ensure that carry is set - ldi bitCnt, 0 ; loop counter with starnd condition = end condition - rjmp usbCrcLoopEntry -usbCrcByteLoop: - ld byte, ptr+ - eor resCrcL, byte -usbCrcBitLoop: - ror resCrcH ; carry is always set here (see brcs jumps to here) - ror resCrcL - brcs usbCrcNoXor - eor resCrcL, polyL - eor resCrcH, polyH -usbCrcNoXor: - subi bitCnt, 224 ; (8 * 224) % 256 = 0; this loop iterates 8 times - brcs usbCrcBitLoop -usbCrcLoopEntry: - subi argLen, -1 - brcs usbCrcByteLoop -usbCrcReady: - ret -; Thanks to Reimar Doeffinger for optimizing this CRC routine! - -#endif /* USB_USE_FAST_CRC */ - -; extern unsigned usbCrc16Append(unsigned char *data, unsigned char len); -usbCrc16Append: - rcall usbCrc16 - st ptr+, resCrcL - st ptr+, resCrcH - ret - -#undef argLen -#undef argPtrL -#undef argPtrH -#undef resCrcL -#undef resCrcH -#undef ptrL -#undef ptrH -#undef ptr -#undef byte -#undef bitCnt -#undef polyL -#undef polyH -#undef scratch - - -#if USB_CFG_HAVE_MEASURE_FRAME_LENGTH -#ifdef __IAR_SYSTEMS_ASM__ -/* Register assignments for usbMeasureFrameLength on IAR cc */ -/* Calling conventions on IAR: - * First parameter passed in r16/r17, second in r18/r19 and so on. - * Callee must preserve r4-r15, r24-r29 (r28/r29 is frame pointer) - * Result is passed in r16/r17 - * In case of the "tiny" memory model, pointers are only 8 bit with no - * padding. We therefore pass argument 1 as "16 bit unsigned". - */ -# define resL r16 -# define resH r17 -# define cnt16L r30 -# define cnt16H r31 -# define cntH r18 - -#else /* __IAR_SYSTEMS_ASM__ */ -/* Register assignments for usbMeasureFrameLength on gcc */ -/* Calling conventions on gcc: - * First parameter passed in r24/r25, second in r22/23 and so on. - * Callee must preserve r1-r17, r28/r29 - * Result is passed in r24/r25 - */ -# define resL r24 -# define resH r25 -# define cnt16L r24 -# define cnt16H r25 -# define cntH r26 -#endif -# define cnt16 cnt16L - -; extern unsigned usbMeasurePacketLength(void); -; returns time between two idle strobes in multiples of 7 CPU clocks -.global usbMeasureFrameLength -usbMeasureFrameLength: - ldi cntH, 6 ; wait ~ 10 ms for D- == 0 - clr cnt16L - clr cnt16H -usbMFTime16: - dec cntH - breq usbMFTimeout -usbMFWaitStrobe: ; first wait for D- == 0 (idle strobe) - sbiw cnt16, 1 ;[0] [6] - breq usbMFTime16 ;[2] - sbic USBIN, USBMINUS ;[3] - rjmp usbMFWaitStrobe ;[4] -usbMFWaitIdle: ; then wait until idle again - sbis USBIN, USBMINUS ;1 wait for D- == 1 - rjmp usbMFWaitIdle ;2 - ldi cnt16L, 1 ;1 represents cycles so far - clr cnt16H ;1 -usbMFWaitLoop: - in cntH, USBIN ;[0] [7] - adiw cnt16, 1 ;[1] - breq usbMFTimeout ;[3] - andi cntH, USBMASK ;[4] - brne usbMFWaitLoop ;[5] -usbMFTimeout: -#if resL != cnt16L - mov resL, cnt16L - mov resH, cnt16H -#endif - ret - -#undef resL -#undef resH -#undef cnt16 -#undef cnt16L -#undef cnt16H -#undef cntH - -#endif /* USB_CFG_HAVE_MEASURE_FRAME_LENGTH */ - -;---------------------------------------------------------------------------- -; Now include the clock rate specific code -;---------------------------------------------------------------------------- - -#ifndef USB_CFG_CLOCK_KHZ -# ifdef F_CPU -# define USB_CFG_CLOCK_KHZ (F_CPU/1000) -# else -# error "USB_CFG_CLOCK_KHZ not defined in usbconfig.h and no F_CPU set!" -# endif -#endif - -#if USB_CFG_CHECK_CRC /* separate dispatcher for CRC type modules */ -# if USB_CFG_CLOCK_KHZ == 18000 -# include "usbdrvasm18-crc.inc" -# else -# error "USB_CFG_CLOCK_KHZ is not one of the supported crc-rates!" -# endif -#else /* USB_CFG_CHECK_CRC */ -# if USB_CFG_CLOCK_KHZ == 12000 -# include "usbdrvasm12.inc" -# elif USB_CFG_CLOCK_KHZ == 12800 -# include "usbdrvasm128.inc" -# elif USB_CFG_CLOCK_KHZ == 15000 -# include "usbdrvasm15.inc" -# elif USB_CFG_CLOCK_KHZ == 16000 -# include "usbdrvasm16.inc" -# elif USB_CFG_CLOCK_KHZ == 16500 -# include "usbdrvasm165.inc" -# elif USB_CFG_CLOCK_KHZ == 20000 -# include "usbdrvasm20.inc" -# else -# error "USB_CFG_CLOCK_KHZ is not one of the supported non-crc-rates!" -# endif -#endif /* USB_CFG_CHECK_CRC */ diff --git a/usbdrv/usbdrvasm.asm b/usbdrv/usbdrvasm.asm deleted file mode 100644 index fb66934..0000000 --- a/usbdrv/usbdrvasm.asm +++ /dev/null @@ -1,20 +0,0 @@ -/* Name: usbdrvasm.asm - * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers - * Author: Christian Starkjohann - * Creation Date: 2006-03-01 - * Tabsize: 4 - * Copyright: (c) 2006 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - */ - -/* -General Description: -The IAR compiler/assembler system prefers assembler files with file extension -".asm". We simply provide this file as an alias for usbdrvasm.S. - -Thanks to Oleg Semyonov for his help with the IAR tools port! -*/ - -#include "usbdrvasm.S" - -end diff --git a/usbdrv/usbdrvasm12.inc b/usbdrv/usbdrvasm12.inc deleted file mode 100644 index d3bd056..0000000 --- a/usbdrv/usbdrvasm12.inc +++ /dev/null @@ -1,392 +0,0 @@ -/* Name: usbdrvasm12.inc - * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers - * Author: Christian Starkjohann - * Creation Date: 2004-12-29 - * Tabsize: 4 - * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - */ - -/* Do not link this file! Link usbdrvasm.S instead, which includes the - * appropriate implementation! - */ - -/* -General Description: -This file is the 12 MHz version of the asssembler part of the USB driver. It -requires a 12 MHz crystal (not a ceramic resonator and not a calibrated RC -oscillator). - -See usbdrv.h for a description of the entire driver. - -Since almost all of this code is timing critical, don't change unless you -really know what you are doing! Many parts require not only a maximum number -of CPU cycles, but even an exact number of cycles! - - -Timing constraints according to spec (in bit times): -timing subject min max CPUcycles ---------------------------------------------------------------------------- -EOP of OUT/SETUP to sync pattern of DATA0 (both rx) 2 16 16-128 -EOP of IN to sync pattern of DATA0 (rx, then tx) 2 7.5 16-60 -DATAx (rx) to ACK/NAK/STALL (tx) 2 7.5 16-60 -*/ - -;Software-receiver engine. Strict timing! Don't change unless you can preserve timing! -;interrupt response time: 4 cycles + insn running = 7 max if interrupts always enabled -;max allowable interrupt latency: 34 cycles -> max 25 cycles interrupt disable -;max stack usage: [ret(2), YL, SREG, YH, shift, x1, x2, x3, cnt, x4] = 11 bytes -;Numbers in brackets are maximum cycles since SOF. -USB_INTR_VECTOR: -;order of registers pushed: YL, SREG [sofError], YH, shift, x1, x2, x3, cnt - push YL ;2 [35] push only what is necessary to sync with edge ASAP - in YL, SREG ;1 [37] - push YL ;2 [39] -;---------------------------------------------------------------------------- -; Synchronize with sync pattern: -;---------------------------------------------------------------------------- -;sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K] -;sync up with J to K edge during sync pattern -- use fastest possible loops -;The first part waits at most 1 bit long since we must be in sync pattern. -;YL is guarenteed to be < 0x80 because I flag is clear. When we jump to -;waitForJ, ensure that this prerequisite is met. -waitForJ: - inc YL - sbis USBIN, USBMINUS - brne waitForJ ; just make sure we have ANY timeout -waitForK: -;The following code results in a sampling window of 1/4 bit which meets the spec. - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK -#if USB_COUNT_SOF - lds YL, usbSofCount - inc YL - sts usbSofCount, YL -#endif /* USB_COUNT_SOF */ -#ifdef USB_SOF_HOOK - USB_SOF_HOOK -#endif - rjmp sofError -foundK: -;{3, 5} after falling D- edge, average delay: 4 cycles [we want 4 for center sampling] -;we have 1 bit time for setup purposes, then sample again. Numbers in brackets -;are cycles from center of first sync (double K) bit after the instruction - push YH ;2 [2] - lds YL, usbInputBufOffset;2 [4] - clr YH ;1 [5] - subi YL, lo8(-(usbRxBuf));1 [6] - sbci YH, hi8(-(usbRxBuf));1 [7] - - sbis USBIN, USBMINUS ;1 [8] we want two bits K [sample 1 cycle too early] - rjmp haveTwoBitsK ;2 [10] - pop YH ;2 [11] undo the push from before - rjmp waitForK ;2 [13] this was not the end of sync, retry -haveTwoBitsK: -;---------------------------------------------------------------------------- -; push more registers and initialize values while we sample the first bits: -;---------------------------------------------------------------------------- - push shift ;2 [16] - push x1 ;2 [12] - push x2 ;2 [14] - - in x1, USBIN ;1 [17] <-- sample bit 0 - ldi shift, 0xff ;1 [18] - bst x1, USBMINUS ;1 [19] - bld shift, 0 ;1 [20] - push x3 ;2 [22] - push cnt ;2 [24] - - in x2, USBIN ;1 [25] <-- sample bit 1 - ser x3 ;1 [26] [inserted init instruction] - eor x1, x2 ;1 [27] - bst x1, USBMINUS ;1 [28] - bld shift, 1 ;1 [29] - ldi cnt, USB_BUFSIZE;1 [30] [inserted init instruction] - rjmp rxbit2 ;2 [32] - -;---------------------------------------------------------------------------- -; Receiver loop (numbers in brackets are cycles within byte after instr) -;---------------------------------------------------------------------------- - -unstuff0: ;1 (branch taken) - andi x3, ~0x01 ;1 [15] - mov x1, x2 ;1 [16] x2 contains last sampled (stuffed) bit - in x2, USBIN ;1 [17] <-- sample bit 1 again - ori shift, 0x01 ;1 [18] - rjmp didUnstuff0 ;2 [20] - -unstuff1: ;1 (branch taken) - mov x2, x1 ;1 [21] x1 contains last sampled (stuffed) bit - andi x3, ~0x02 ;1 [22] - ori shift, 0x02 ;1 [23] - nop ;1 [24] - in x1, USBIN ;1 [25] <-- sample bit 2 again - rjmp didUnstuff1 ;2 [27] - -unstuff2: ;1 (branch taken) - andi x3, ~0x04 ;1 [29] - ori shift, 0x04 ;1 [30] - mov x1, x2 ;1 [31] x2 contains last sampled (stuffed) bit - nop ;1 [32] - in x2, USBIN ;1 [33] <-- sample bit 3 - rjmp didUnstuff2 ;2 [35] - -unstuff3: ;1 (branch taken) - in x2, USBIN ;1 [34] <-- sample stuffed bit 3 [one cycle too late] - andi x3, ~0x08 ;1 [35] - ori shift, 0x08 ;1 [36] - rjmp didUnstuff3 ;2 [38] - -unstuff4: ;1 (branch taken) - andi x3, ~0x10 ;1 [40] - in x1, USBIN ;1 [41] <-- sample stuffed bit 4 - ori shift, 0x10 ;1 [42] - rjmp didUnstuff4 ;2 [44] - -unstuff5: ;1 (branch taken) - andi x3, ~0x20 ;1 [48] - in x2, USBIN ;1 [49] <-- sample stuffed bit 5 - ori shift, 0x20 ;1 [50] - rjmp didUnstuff5 ;2 [52] - -unstuff6: ;1 (branch taken) - andi x3, ~0x40 ;1 [56] - in x1, USBIN ;1 [57] <-- sample stuffed bit 6 - ori shift, 0x40 ;1 [58] - rjmp didUnstuff6 ;2 [60] - -; extra jobs done during bit interval: -; bit 0: store, clear [SE0 is unreliable here due to bit dribbling in hubs] -; bit 1: se0 check -; bit 2: overflow check -; bit 3: recovery from delay [bit 0 tasks took too long] -; bit 4: none -; bit 5: none -; bit 6: none -; bit 7: jump, eor -rxLoop: - eor x3, shift ;1 [0] reconstruct: x3 is 0 at bit locations we changed, 1 at others - in x1, USBIN ;1 [1] <-- sample bit 0 - st y+, x3 ;2 [3] store data - ser x3 ;1 [4] - nop ;1 [5] - eor x2, x1 ;1 [6] - bst x2, USBMINUS;1 [7] - bld shift, 0 ;1 [8] - in x2, USBIN ;1 [9] <-- sample bit 1 (or possibly bit 0 stuffed) - andi x2, USBMASK ;1 [10] - breq se0 ;1 [11] SE0 check for bit 1 - andi shift, 0xf9 ;1 [12] -didUnstuff0: - breq unstuff0 ;1 [13] - eor x1, x2 ;1 [14] - bst x1, USBMINUS;1 [15] - bld shift, 1 ;1 [16] -rxbit2: - in x1, USBIN ;1 [17] <-- sample bit 2 (or possibly bit 1 stuffed) - andi shift, 0xf3 ;1 [18] - breq unstuff1 ;1 [19] do remaining work for bit 1 -didUnstuff1: - subi cnt, 1 ;1 [20] - brcs overflow ;1 [21] loop control - eor x2, x1 ;1 [22] - bst x2, USBMINUS;1 [23] - bld shift, 2 ;1 [24] - in x2, USBIN ;1 [25] <-- sample bit 3 (or possibly bit 2 stuffed) - andi shift, 0xe7 ;1 [26] - breq unstuff2 ;1 [27] -didUnstuff2: - eor x1, x2 ;1 [28] - bst x1, USBMINUS;1 [29] - bld shift, 3 ;1 [30] -didUnstuff3: - andi shift, 0xcf ;1 [31] - breq unstuff3 ;1 [32] - in x1, USBIN ;1 [33] <-- sample bit 4 - eor x2, x1 ;1 [34] - bst x2, USBMINUS;1 [35] - bld shift, 4 ;1 [36] -didUnstuff4: - andi shift, 0x9f ;1 [37] - breq unstuff4 ;1 [38] - nop2 ;2 [40] - in x2, USBIN ;1 [41] <-- sample bit 5 - eor x1, x2 ;1 [42] - bst x1, USBMINUS;1 [43] - bld shift, 5 ;1 [44] -didUnstuff5: - andi shift, 0x3f ;1 [45] - breq unstuff5 ;1 [46] - nop2 ;2 [48] - in x1, USBIN ;1 [49] <-- sample bit 6 - eor x2, x1 ;1 [50] - bst x2, USBMINUS;1 [51] - bld shift, 6 ;1 [52] -didUnstuff6: - cpi shift, 0x02 ;1 [53] - brlo unstuff6 ;1 [54] - nop2 ;2 [56] - in x2, USBIN ;1 [57] <-- sample bit 7 - eor x1, x2 ;1 [58] - bst x1, USBMINUS;1 [59] - bld shift, 7 ;1 [60] -didUnstuff7: - cpi shift, 0x04 ;1 [61] - brsh rxLoop ;2 [63] loop control -unstuff7: - andi x3, ~0x80 ;1 [63] - ori shift, 0x80 ;1 [64] - in x2, USBIN ;1 [65] <-- sample stuffed bit 7 - nop ;1 [66] - rjmp didUnstuff7 ;2 [68] - -macro POP_STANDARD ; 12 cycles - pop cnt - pop x3 - pop x2 - pop x1 - pop shift - pop YH - endm -macro POP_RETI ; 5 cycles - pop YL - out SREG, YL - pop YL - endm - -#include "asmcommon.inc" - -;---------------------------------------------------------------------------- -; Transmitting data -;---------------------------------------------------------------------------- - -txByteLoop: -txBitloop: -stuffN1Delay: ; [03] - ror shift ;[-5] [11] [59] - brcc doExorN1 ;[-4] [60] - subi x4, 1 ;[-3] - brne commonN1 ;[-2] - lsl shift ;[-1] compensate ror after rjmp stuffDelay - nop ;[00] stuffing consists of just waiting 8 cycles - rjmp stuffN1Delay ;[01] after ror, C bit is reliably clear - -sendNakAndReti: ;0 [-19] 19 cycles until SOP - ldi x3, USBPID_NAK ;1 [-18] - rjmp usbSendX3 ;2 [-16] -sendAckAndReti: ;0 [-19] 19 cycles until SOP - ldi x3, USBPID_ACK ;1 [-18] - rjmp usbSendX3 ;2 [-16] -sendCntAndReti: ;0 [-17] 17 cycles until SOP - mov x3, cnt ;1 [-16] -usbSendX3: ;0 [-16] - ldi YL, 20 ;1 [-15] 'x3' is R20 - ldi YH, 0 ;1 [-14] - ldi cnt, 2 ;1 [-13] -; rjmp usbSendAndReti fallthrough - -; USB spec says: -; idle = J -; J = (D+ = 0), (D- = 1) or USBOUT = 0x01 -; K = (D+ = 1), (D- = 0) or USBOUT = 0x02 -; Spec allows 7.5 bit times from EOP to SOP for replies (= 60 cycles) - -;usbSend: -;pointer to data in 'Y' -;number of bytes in 'cnt' -- including sync byte -;uses: x1...x2, x4, shift, cnt, Y [x1 = mirror USBOUT, x2 = USBMASK, x4 = bitstuff cnt] -;Numbers in brackets are time since first bit of sync pattern is sent (start of instruction) -usbSendAndReti: - in x2, USBDDR ;[-12] 12 cycles until SOP - ori x2, USBMASK ;[-11] - sbi USBOUT, USBMINUS ;[-10] prepare idle state; D+ and D- must have been 0 (no pullups) - out USBDDR, x2 ;[-8] <--- acquire bus - in x1, USBOUT ;[-7] port mirror for tx loop - ldi shift, 0x40 ;[-6] sync byte is first byte sent (we enter loop after ror) - ldi x2, USBMASK ;[-5] - push x4 ;[-4] -doExorN1: - eor x1, x2 ;[-2] [06] [62] - ldi x4, 6 ;[-1] [07] [63] -commonN1: -stuffN2Delay: - out USBOUT, x1 ;[00] [08] [64] <--- set bit - ror shift ;[01] - brcc doExorN2 ;[02] - subi x4, 1 ;[03] - brne commonN2 ;[04] - lsl shift ;[05] compensate ror after rjmp stuffDelay - rjmp stuffN2Delay ;[06] after ror, C bit is reliably clear -doExorN2: - eor x1, x2 ;[04] [12] - ldi x4, 6 ;[05] [13] -commonN2: - nop ;[06] [14] - subi cnt, 171 ;[07] [15] trick: (3 * 171) & 0xff = 1 - out USBOUT, x1 ;[08] [16] <--- set bit - brcs txBitloop ;[09] [25] [41] - -stuff6Delay: - ror shift ;[42] [50] - brcc doExor6 ;[43] - subi x4, 1 ;[44] - brne common6 ;[45] - lsl shift ;[46] compensate ror after rjmp stuffDelay - nop ;[47] stuffing consists of just waiting 8 cycles - rjmp stuff6Delay ;[48] after ror, C bit is reliably clear -doExor6: - eor x1, x2 ;[45] [53] - ldi x4, 6 ;[46] -common6: -stuff7Delay: - ror shift ;[47] [55] - out USBOUT, x1 ;[48] <--- set bit - brcc doExor7 ;[49] - subi x4, 1 ;[50] - brne common7 ;[51] - lsl shift ;[52] compensate ror after rjmp stuffDelay - rjmp stuff7Delay ;[53] after ror, C bit is reliably clear -doExor7: - eor x1, x2 ;[51] [59] - ldi x4, 6 ;[52] -common7: - ld shift, y+ ;[53] - tst cnt ;[55] - out USBOUT, x1 ;[56] <--- set bit - brne txByteLoop ;[57] - -;make SE0: - cbr x1, USBMASK ;[58] prepare SE0 [spec says EOP may be 15 to 18 cycles] - lds x2, usbNewDeviceAddr;[59] - lsl x2 ;[61] we compare with left shifted address - subi YL, 2 + 20 ;[62] Only assign address on data packets, not ACK/NAK in x3 - sbci YH, 0 ;[63] - out USBOUT, x1 ;[00] <-- out SE0 -- from now 2 bits = 16 cycles until bus idle -;2006-03-06: moved transfer of new address to usbDeviceAddr from C-Code to asm: -;set address only after data packet was sent, not after handshake - breq skipAddrAssign ;[01] - sts usbDeviceAddr, x2 ; if not skipped: SE0 is one cycle longer -skipAddrAssign: -;end of usbDeviceAddress transfer - ldi x2, 1< 12.5625 MHz -max frequency: 69.286 cycles for 8 bit -> 12.99 MHz -nominal frequency: 12.77 MHz ( = sqrt(min * max)) - -sampling positions: (next even number in range [+/- 0.5]) -cycle index range: 0 ... 66 -bits: -.5, 8.875, 17.25, 25.625, 34, 42.375, 50.75, 59.125 -[0/1], [9], [17], [25/+26], [34], [+42/43], [51], [59] - -bit number: 0 1 2 3 4 5 6 7 -spare cycles 1 2 1 2 1 1 1 0 - -operations to perform: duration cycle - ---------------- - eor fix, shift 1 -> 00 - andi phase, USBMASK 1 -> 08 - breq se0 1 -> 16 (moved to 11) - st y+, data 2 -> 24, 25 - mov data, fix 1 -> 33 - ser data 1 -> 41 - subi cnt, 1 1 -> 49 - brcs overflow 1 -> 50 - -layout of samples and operations: -[##] = sample bit -<##> = sample phase -*##* = operation - -0: *00* [01] 02 03 04 <05> 06 07 -1: *08* [09] 10 11 12 <13> 14 15 *16* -2: [17] 18 19 20 <21> 22 23 -3: *24* *25* [26] 27 28 29 <30> 31 32 -4: *33* [34] 35 36 37 <38> 39 40 -5: *41* [42] 43 44 45 <46> 47 48 -6: *49* *50* [51] 52 53 54 <55> 56 57 58 -7: [59] 60 61 62 <63> 64 65 66 -*****************************************************************************/ - -/* we prefer positive expressions (do if condition) instead of negative - * (skip if condition), therefore use defines for skip instructions: - */ -#define ifioclr sbis -#define ifioset sbic -#define ifrclr sbrs -#define ifrset sbrc - -/* The registers "fix" and "data" swap their meaning during the loop. Use - * defines to keep their name constant. - */ -#define fix x2 -#define data x1 -#undef phase /* phase has a default definition to x4 */ -#define phase x3 - - -USB_INTR_VECTOR: -;order of registers pushed: YL, SREG [sofError], YH, shift, x1, x2, x3, cnt, r0 - push YL ;2 push only what is necessary to sync with edge ASAP - in YL, SREG ;1 - push YL ;2 -;---------------------------------------------------------------------------- -; Synchronize with sync pattern: -;---------------------------------------------------------------------------- -;sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K] -;sync up with J to K edge during sync pattern -- use fastest possible loops -;The first part waits at most 1 bit long since we must be in sync pattern. -;YL is guarenteed to be < 0x80 because I flag is clear. When we jump to -;waitForJ, ensure that this prerequisite is met. -waitForJ: - inc YL - sbis USBIN, USBMINUS - brne waitForJ ; just make sure we have ANY timeout -waitForK: -;The following code results in a sampling window of 1/4 bit which meets the spec. - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS ;[0] - rjmp foundK ;[1] -#if USB_COUNT_SOF - lds YL, usbSofCount - inc YL - sts usbSofCount, YL -#endif /* USB_COUNT_SOF */ -#ifdef USB_SOF_HOOK - USB_SOF_HOOK -#endif - rjmp sofError - -foundK: -;{3, 5} after falling D- edge, average delay: 4 cycles [we want 4 for center sampling] -;we have 1 bit time for setup purposes, then sample again. Numbers in brackets -;are cycles from center of first sync (double K) bit after the instruction - push YH ;[2] - lds YL, usbInputBufOffset;[4] - clr YH ;[6] - subi YL, lo8(-(usbRxBuf));[7] - sbci YH, hi8(-(usbRxBuf));[8] - - sbis USBIN, USBMINUS ;[9] we want two bits K [we want to sample at 8 + 4 - 1.5 = 10.5] - rjmp haveTwoBitsK ;[10] - pop YH ;[11] undo the push from before - rjmp waitForK ;[13] this was not the end of sync, retry -haveTwoBitsK: -;---------------------------------------------------------------------------- -; push more registers and initialize values while we sample the first bits: -;---------------------------------------------------------------------------- -#define fix x2 -#define data x1 - - push shift ;[12] - push x1 ;[14] - push x2 ;[16] - ldi shift, 0x80 ;[18] prevent bit-unstuffing but init low bits to 0 - ifioset USBIN, USBMINUS ;[19] [01] <--- bit 0 [10.5 + 8 = 18.5] - ori shift, 1<<0 ;[02] - push x3 ;[03] - push cnt ;[05] - push r0 ;[07] - ifioset USBIN, USBMINUS ;[09] <--- bit 1 - ori shift, 1<<1 ;[10] - ser fix ;[11] - ldi cnt, USB_BUFSIZE ;[12] - mov data, shift ;[13] - lsl shift ;[14] - nop2 ;[15] - ifioset USBIN, USBMINUS ;[17] <--- bit 2 - ori data, 3<<2 ;[18] store in bit 2 AND bit 3 - eor shift, data ;[19] do nrzi decoding - andi data, 1<<3 ;[20] - in phase, USBIN ;[21] <- phase - brne jumpToEntryAfterSet ;[22] if USBMINS at bit 3 was 1 - nop ;[23] - rjmp entryAfterClr ;[24] -jumpToEntryAfterSet: - rjmp entryAfterSet ;[24] - -;---------------------------------------------------------------------------- -; Receiver loop (numbers in brackets are cycles within byte after instr) -;---------------------------------------------------------------------------- -#undef fix -#define fix x1 -#undef data -#define data x2 - -bit7IsSet: - ifrclr phase, USBMINUS ;[62] check phase only if D- changed - lpm ;[63] - in phase, USBIN ;[64] <- phase (one cycle too late) - ori shift, 1 << 7 ;[65] - nop ;[66] -;;;;rjmp bit0AfterSet ; -> [00] == [67] moved block up to save jump -bit0AfterSet: - eor fix, shift ;[00] -#undef fix -#define fix x2 -#undef data -#define data x1 /* we now have result in data, fix is reset to 0xff */ - ifioclr USBIN, USBMINUS ;[01] <--- sample 0 - rjmp bit0IsClr ;[02] - andi shift, ~(7 << 0) ;[03] - breq unstuff0s ;[04] - in phase, USBIN ;[05] <- phase - rjmp bit1AfterSet ;[06] -unstuff0s: - in phase, USBIN ;[06] <- phase (one cycle too late) - andi fix, ~(1 << 0) ;[07] - ifioclr USBIN, USBMINUS ;[00] - ifioset USBIN, USBPLUS ;[01] - rjmp bit0IsClr ;[02] executed if first expr false or second true -se0AndStore: ; executed only if both bits 0 - st y+, x1 ;[15/17] cycles after start of byte - rjmp se0 ;[17/19] - -bit0IsClr: - ifrset phase, USBMINUS ;[04] check phase only if D- changed - lpm ;[05] - in phase, USBIN ;[06] <- phase (one cycle too late) - ori shift, 1 << 0 ;[07] -bit1AfterClr: - andi phase, USBMASK ;[08] - ifioset USBIN, USBMINUS ;[09] <--- sample 1 - rjmp bit1IsSet ;[10] - breq se0AndStore ;[11] if D- was 0 in bits 0 AND 1 and D+ was 0 in between, we have SE0 - andi shift, ~(7 << 1) ;[12] - in phase, USBIN ;[13] <- phase - breq unstuff1c ;[14] - rjmp bit2AfterClr ;[15] -unstuff1c: - andi fix, ~(1 << 1) ;[16] - nop2 ;[08] - nop2 ;[10] -bit1IsSet: - ifrclr phase, USBMINUS ;[12] check phase only if D- changed - lpm ;[13] - in phase, USBIN ;[14] <- phase (one cycle too late) - ori shift, 1 << 1 ;[15] - nop ;[16] -bit2AfterSet: - ifioclr USBIN, USBMINUS ;[17] <--- sample 2 - rjmp bit2IsClr ;[18] - andi shift, ~(7 << 2) ;[19] - breq unstuff2s ;[20] - in phase, USBIN ;[21] <- phase - rjmp bit3AfterSet ;[22] -unstuff2s: - in phase, USBIN ;[22] <- phase (one cycle too late) - andi fix, ~(1 << 2) ;[23] - nop2 ;[16] - nop2 ;[18] -bit2IsClr: - ifrset phase, USBMINUS ;[20] check phase only if D- changed - lpm ;[21] - in phase, USBIN ;[22] <- phase (one cycle too late) - ori shift, 1 << 2 ;[23] -bit3AfterClr: - st y+, data ;[24] -entryAfterClr: - ifioset USBIN, USBMINUS ;[26] <--- sample 3 - rjmp bit3IsSet ;[27] - andi shift, ~(7 << 3) ;[28] - breq unstuff3c ;[29] - in phase, USBIN ;[30] <- phase - rjmp bit4AfterClr ;[31] -unstuff3c: - in phase, USBIN ;[31] <- phase (one cycle too late) - andi fix, ~(1 << 3) ;[32] - nop2 ;[25] - nop2 ;[27] -bit3IsSet: - ifrclr phase, USBMINUS ;[29] check phase only if D- changed - lpm ;[30] - in phase, USBIN ;[31] <- phase (one cycle too late) - ori shift, 1 << 3 ;[32] -bit4AfterSet: - mov data, fix ;[33] undo this move by swapping defines -#undef fix -#define fix x1 -#undef data -#define data x2 - ifioclr USBIN, USBMINUS ;[34] <--- sample 4 - rjmp bit4IsClr ;[35] - andi shift, ~(7 << 4) ;[36] - breq unstuff4s ;[37] - in phase, USBIN ;[38] <- phase - rjmp bit5AfterSet ;[39] -unstuff4s: - in phase, USBIN ;[39] <- phase (one cycle too late) - andi fix, ~(1 << 4) ;[40] - nop2 ;[33] - nop2 ;[35] -bit4IsClr: - ifrset phase, USBMINUS ;[37] check phase only if D- changed - lpm ;[38] - in phase, USBIN ;[39] <- phase (one cycle too late) - ori shift, 1 << 4 ;[40] -bit5AfterClr: - ser data ;[41] - ifioset USBIN, USBMINUS ;[42] <--- sample 5 - rjmp bit5IsSet ;[43] - andi shift, ~(7 << 5) ;[44] - breq unstuff5c ;[45] - in phase, USBIN ;[46] <- phase - rjmp bit6AfterClr ;[47] -unstuff5c: - in phase, USBIN ;[47] <- phase (one cycle too late) - andi fix, ~(1 << 5) ;[48] - nop2 ;[41] - nop2 ;[43] -bit5IsSet: - ifrclr phase, USBMINUS ;[45] check phase only if D- changed - lpm ;[46] - in phase, USBIN ;[47] <- phase (one cycle too late) - ori shift, 1 << 5 ;[48] -bit6AfterSet: - subi cnt, 1 ;[49] - brcs jumpToOverflow ;[50] - ifioclr USBIN, USBMINUS ;[51] <--- sample 6 - rjmp bit6IsClr ;[52] - andi shift, ~(3 << 6) ;[53] - cpi shift, 2 ;[54] - in phase, USBIN ;[55] <- phase - brlt unstuff6s ;[56] - rjmp bit7AfterSet ;[57] - -jumpToOverflow: - rjmp overflow - -unstuff6s: - andi fix, ~(1 << 6) ;[50] - lpm ;[51] -bit6IsClr: - ifrset phase, USBMINUS ;[54] check phase only if D- changed - lpm ;[55] - in phase, USBIN ;[56] <- phase (one cycle too late) - ori shift, 1 << 6 ;[57] - nop ;[58] -bit7AfterClr: - ifioset USBIN, USBMINUS ;[59] <--- sample 7 - rjmp bit7IsSet ;[60] - andi shift, ~(1 << 7) ;[61] - cpi shift, 4 ;[62] - in phase, USBIN ;[63] <- phase - brlt unstuff7c ;[64] - rjmp bit0AfterClr ;[65] -> [00] == [67] -unstuff7c: - andi fix, ~(1 << 7) ;[58] - nop ;[59] - rjmp bit7IsSet ;[60] - -bit7IsClr: - ifrset phase, USBMINUS ;[62] check phase only if D- changed - lpm ;[63] - in phase, USBIN ;[64] <- phase (one cycle too late) - ori shift, 1 << 7 ;[65] - nop ;[66] -;;;;rjmp bit0AfterClr ; -> [00] == [67] moved block up to save jump -bit0AfterClr: - eor fix, shift ;[00] -#undef fix -#define fix x2 -#undef data -#define data x1 /* we now have result in data, fix is reset to 0xff */ - ifioset USBIN, USBMINUS ;[01] <--- sample 0 - rjmp bit0IsSet ;[02] - andi shift, ~(7 << 0) ;[03] - breq unstuff0c ;[04] - in phase, USBIN ;[05] <- phase - rjmp bit1AfterClr ;[06] -unstuff0c: - in phase, USBIN ;[06] <- phase (one cycle too late) - andi fix, ~(1 << 0) ;[07] - ifioclr USBIN, USBMINUS ;[00] - ifioset USBIN, USBPLUS ;[01] - rjmp bit0IsSet ;[02] executed if first expr false or second true - rjmp se0AndStore ;[03] executed only if both bits 0 -bit0IsSet: - ifrclr phase, USBMINUS ;[04] check phase only if D- changed - lpm ;[05] - in phase, USBIN ;[06] <- phase (one cycle too late) - ori shift, 1 << 0 ;[07] -bit1AfterSet: - andi shift, ~(7 << 1) ;[08] compensated by "ori shift, 1<<1" if bit1IsClr - ifioclr USBIN, USBMINUS ;[09] <--- sample 1 - rjmp bit1IsClr ;[10] - breq unstuff1s ;[11] - nop2 ;[12] do not check for SE0 if bit 0 was 1 - in phase, USBIN ;[14] <- phase (one cycle too late) - rjmp bit2AfterSet ;[15] -unstuff1s: - in phase, USBIN ;[13] <- phase - andi fix, ~(1 << 1) ;[14] - lpm ;[07] - nop2 ;[10] -bit1IsClr: - ifrset phase, USBMINUS ;[12] check phase only if D- changed - lpm ;[13] - in phase, USBIN ;[14] <- phase (one cycle too late) - ori shift, 1 << 1 ;[15] - nop ;[16] -bit2AfterClr: - ifioset USBIN, USBMINUS ;[17] <--- sample 2 - rjmp bit2IsSet ;[18] - andi shift, ~(7 << 2) ;[19] - breq unstuff2c ;[20] - in phase, USBIN ;[21] <- phase - rjmp bit3AfterClr ;[22] -unstuff2c: - in phase, USBIN ;[22] <- phase (one cycle too late) - andi fix, ~(1 << 2) ;[23] - nop2 ;[16] - nop2 ;[18] -bit2IsSet: - ifrclr phase, USBMINUS ;[20] check phase only if D- changed - lpm ;[21] - in phase, USBIN ;[22] <- phase (one cycle too late) - ori shift, 1 << 2 ;[23] -bit3AfterSet: - st y+, data ;[24] -entryAfterSet: - ifioclr USBIN, USBMINUS ;[26] <--- sample 3 - rjmp bit3IsClr ;[27] - andi shift, ~(7 << 3) ;[28] - breq unstuff3s ;[29] - in phase, USBIN ;[30] <- phase - rjmp bit4AfterSet ;[31] -unstuff3s: - in phase, USBIN ;[31] <- phase (one cycle too late) - andi fix, ~(1 << 3) ;[32] - nop2 ;[25] - nop2 ;[27] -bit3IsClr: - ifrset phase, USBMINUS ;[29] check phase only if D- changed - lpm ;[30] - in phase, USBIN ;[31] <- phase (one cycle too late) - ori shift, 1 << 3 ;[32] -bit4AfterClr: - mov data, fix ;[33] undo this move by swapping defines -#undef fix -#define fix x1 -#undef data -#define data x2 - ifioset USBIN, USBMINUS ;[34] <--- sample 4 - rjmp bit4IsSet ;[35] - andi shift, ~(7 << 4) ;[36] - breq unstuff4c ;[37] - in phase, USBIN ;[38] <- phase - rjmp bit5AfterClr ;[39] -unstuff4c: - in phase, USBIN ;[39] <- phase (one cycle too late) - andi fix, ~(1 << 4) ;[40] - nop2 ;[33] - nop2 ;[35] -bit4IsSet: - ifrclr phase, USBMINUS ;[37] check phase only if D- changed - lpm ;[38] - in phase, USBIN ;[39] <- phase (one cycle too late) - ori shift, 1 << 4 ;[40] -bit5AfterSet: - ser data ;[41] - ifioclr USBIN, USBMINUS ;[42] <--- sample 5 - rjmp bit5IsClr ;[43] - andi shift, ~(7 << 5) ;[44] - breq unstuff5s ;[45] - in phase, USBIN ;[46] <- phase - rjmp bit6AfterSet ;[47] -unstuff5s: - in phase, USBIN ;[47] <- phase (one cycle too late) - andi fix, ~(1 << 5) ;[48] - nop2 ;[41] - nop2 ;[43] -bit5IsClr: - ifrset phase, USBMINUS ;[45] check phase only if D- changed - lpm ;[46] - in phase, USBIN ;[47] <- phase (one cycle too late) - ori shift, 1 << 5 ;[48] -bit6AfterClr: - subi cnt, 1 ;[49] - brcs overflow ;[50] - ifioset USBIN, USBMINUS ;[51] <--- sample 6 - rjmp bit6IsSet ;[52] - andi shift, ~(3 << 6) ;[53] - cpi shift, 2 ;[54] - in phase, USBIN ;[55] <- phase - brlt unstuff6c ;[56] - rjmp bit7AfterClr ;[57] -unstuff6c: - andi fix, ~(1 << 6) ;[50] - lpm ;[51] -bit6IsSet: - ifrclr phase, USBMINUS ;[54] check phase only if D- changed - lpm ;[55] - in phase, USBIN ;[56] <- phase (one cycle too late) - ori shift, 1 << 6 ;[57] -bit7AfterSet: - ifioclr USBIN, USBMINUS ;[59] <--- sample 7 - rjmp bit7IsClr ;[60] - andi shift, ~(1 << 7) ;[61] - cpi shift, 4 ;[62] - in phase, USBIN ;[63] <- phase - brlt unstuff7s ;[64] - rjmp bit0AfterSet ;[65] -> [00] == [67] -unstuff7s: - andi fix, ~(1 << 7) ;[58] - nop ;[59] - rjmp bit7IsClr ;[60] - -macro POP_STANDARD ; 14 cycles - pop r0 - pop cnt - pop x3 - pop x2 - pop x1 - pop shift - pop YH - endm -macro POP_RETI ; 5 cycles - pop YL - out SREG, YL - pop YL - endm - -#include "asmcommon.inc" - -;---------------------------------------------------------------------------- -; Transmitting data -;---------------------------------------------------------------------------- - -txByteLoop: -txBitloop: -stuffN1Delay: ; [03] - ror shift ;[-5] [11] [63] - brcc doExorN1 ;[-4] [64] - subi x3, 1 ;[-3] - brne commonN1 ;[-2] - lsl shift ;[-1] compensate ror after rjmp stuffDelay - nop ;[00] stuffing consists of just waiting 8 cycles - rjmp stuffN1Delay ;[01] after ror, C bit is reliably clear - -sendNakAndReti: - ldi cnt, USBPID_NAK ;[-19] - rjmp sendCntAndReti ;[-18] -sendAckAndReti: - ldi cnt, USBPID_ACK ;[-17] -sendCntAndReti: - mov r0, cnt ;[-16] - ldi YL, 0 ;[-15] R0 address is 0 - ldi YH, 0 ;[-14] - ldi cnt, 2 ;[-13] -; rjmp usbSendAndReti fallthrough - -; USB spec says: -; idle = J -; J = (D+ = 0), (D- = 1) or USBOUT = 0x01 -; K = (D+ = 1), (D- = 0) or USBOUT = 0x02 -; Spec allows 7.5 bit times from EOP to SOP for replies (= 60 cycles) - -;usbSend: -;pointer to data in 'Y' -;number of bytes in 'cnt' -- including sync byte -;uses: x1...x3, shift, cnt, Y [x1 = mirror USBOUT, x2 = USBMASK, x3 = bitstuff cnt] -;Numbers in brackets are time since first bit of sync pattern is sent (start of instruction) -usbSendAndReti: - in x2, USBDDR ;[-10] 10 cycles until SOP - ori x2, USBMASK ;[-9] - sbi USBOUT, USBMINUS ;[-8] prepare idle state; D+ and D- must have been 0 (no pullups) - out USBDDR, x2 ;[-6] <--- acquire bus - in x1, USBOUT ;[-5] port mirror for tx loop - ldi shift, 0x40 ;[-4] sync byte is first byte sent (we enter loop after ror) - ldi x2, USBMASK ;[-3] -doExorN1: - eor x1, x2 ;[-2] [06] [62] - ldi x3, 6 ;[-1] [07] [63] -commonN1: -stuffN2Delay: - out USBOUT, x1 ;[00] [08] [64] <--- set bit - ror shift ;[01] - brcc doExorN2 ;[02] - subi x3, 1 ;[03] - brne commonN2 ;[04] - lsl shift ;[05] compensate ror after rjmp stuffDelay - rjmp stuffN2Delay ;[06] after ror, C bit is reliably clear -doExorN2: - eor x1, x2 ;[04] [12] - ldi x3, 6 ;[05] [13] -commonN2: - nop2 ;[06] [14] - subi cnt, 171 ;[08] [16] trick: (3 * 171) & 0xff = 1 - out USBOUT, x1 ;[09] [17] <--- set bit - brcs txBitloop ;[10] [27] [44] - -stuff6Delay: - ror shift ;[45] [53] - brcc doExor6 ;[46] - subi x3, 1 ;[47] - brne common6 ;[48] - lsl shift ;[49] compensate ror after rjmp stuffDelay - nop ;[50] stuffing consists of just waiting 8 cycles - rjmp stuff6Delay ;[51] after ror, C bit is reliably clear -doExor6: - eor x1, x2 ;[48] [56] - ldi x3, 6 ;[49] -common6: -stuff7Delay: - ror shift ;[50] [58] - out USBOUT, x1 ;[51] <--- set bit - brcc doExor7 ;[52] - subi x3, 1 ;[53] - brne common7 ;[54] - lsl shift ;[55] compensate ror after rjmp stuffDelay - rjmp stuff7Delay ;[56] after ror, C bit is reliably clear -doExor7: - eor x1, x2 ;[54] [62] - ldi x3, 6 ;[55] -common7: - ld shift, y+ ;[56] - nop ;[58] - tst cnt ;[59] - out USBOUT, x1 ;[60] [00]<--- set bit - brne txByteLoop ;[61] [01] -;make SE0: - cbr x1, USBMASK ;[02] prepare SE0 [spec says EOP may be 15 to 18 cycles] - lds x2, usbNewDeviceAddr;[03] - lsl x2 ;[05] we compare with left shifted address - subi YL, 2 + 0 ;[06] Only assign address on data packets, not ACK/NAK in r0 - sbci YH, 0 ;[07] - out USBOUT, x1 ;[00] <-- out SE0 -- from now 2 bits = 16 cycles until bus idle -;2006-03-06: moved transfer of new address to usbDeviceAddr from C-Code to asm: -;set address only after data packet was sent, not after handshake - breq skipAddrAssign ;[01] - sts usbDeviceAddr, x2 ; if not skipped: SE0 is one cycle longer -skipAddrAssign: -;end of usbDeviceAddress transfer - ldi x2, 1< 0) - echo "$s\n"; - } -} - -function printBit($isAfterSet, $bitNum) -{ - ob_start(); - if($isAfterSet){ -?> - ifioclr USBIN, USBMINUS ;[00] <--- sample - rjmp bit#IsClr ;[01] - andi shift, ~(7 << #) ;[02] - breq unstuff#s ;[03] - in phase, USBIN ;[04] <- phase - rjmp bit@AfterSet ;[05] -unstuff#s: - in phase, USBIN ;[05] <- phase (one cycle too late) - andi fix, ~(1 << #) ;[06] - nop2 ;[-1] - nop2 ;[01] -bit#IsClr: - ifrset phase, USBMINUS ;[03] check phase only if D- changed - lpm ;[04] - in phase, USBIN ;[05] <- phase (one cycle too late) - ori shift, 1 << # ;[06] - - ifioset USBIN, USBMINUS ;[00] <--- sample - rjmp bit#IsSet ;[01] - andi shift, ~(7 << #) ;[02] - breq unstuff#c ;[03] - in phase, USBIN ;[04] <- phase - rjmp bit@AfterClr ;[05] -unstuff#c: - in phase, USBIN ;[05] <- phase (one cycle too late) - andi fix, ~(1 << #) ;[06] - nop2 ;[-1] - nop2 ;[01] -bit#IsSet: - ifrclr phase, USBMINUS ;[03] check phase only if D- changed - lpm ;[04] - in phase, USBIN ;[05] <- phase (one cycle too late) - ori shift, 1 << # ;[06] - -*****************************************************************************/ diff --git a/usbdrv/usbdrvasm15.inc b/usbdrv/usbdrvasm15.inc deleted file mode 100644 index 33bcf0e..0000000 --- a/usbdrv/usbdrvasm15.inc +++ /dev/null @@ -1,422 +0,0 @@ -/* Name: usbdrvasm15.inc - * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers - * Author: contributed by V. Bosch - * Creation Date: 2007-08-06 - * Tabsize: 4 - * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - */ - -/* Do not link this file! Link usbdrvasm.S instead, which includes the - * appropriate implementation! - */ - -/* -General Description: -This file is the 15 MHz version of the asssembler part of the USB driver. It -requires a 15 MHz crystal (not a ceramic resonator and not a calibrated RC -oscillator). - -See usbdrv.h for a description of the entire driver. - -Since almost all of this code is timing critical, don't change unless you -really know what you are doing! Many parts require not only a maximum number -of CPU cycles, but even an exact number of cycles! -*/ - -;max stack usage: [ret(2), YL, SREG, YH, bitcnt, shift, x1, x2, x3, x4, cnt] = 12 bytes -;nominal frequency: 15 MHz -> 10.0 cycles per bit, 80.0 cycles per byte -; Numbers in brackets are clocks counted from center of last sync bit -; when instruction starts - -;---------------------------------------------------------------------------- -; order of registers pushed: -; YL, SREG [sofError] YH, shift, x1, x2, x3, bitcnt, cnt, x4 -;---------------------------------------------------------------------------- -USB_INTR_VECTOR: - push YL ;2 push only what is necessary to sync with edge ASAP - in YL, SREG ;1 - push YL ;2 -;---------------------------------------------------------------------------- -; Synchronize with sync pattern: -; -; sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K] -; sync up with J to K edge during sync pattern -- use fastest possible loops -;The first part waits at most 1 bit long since we must be in sync pattern. -;YL is guarenteed to be < 0x80 because I flag is clear. When we jump to -;waitForJ, ensure that this prerequisite is met. -waitForJ: - inc YL - sbis USBIN, USBMINUS - brne waitForJ ; just make sure we have ANY timeout -;------------------------------------------------------------------------------- -; The following code results in a sampling window of < 1/4 bit -; which meets the spec. -;------------------------------------------------------------------------------- -waitForK: ;- - sbis USBIN, USBMINUS ;1 [00] <-- sample - rjmp foundK ;2 [01] - sbis USBIN, USBMINUS ; <-- sample - rjmp foundK - sbis USBIN, USBMINUS ; <-- sample - rjmp foundK - sbis USBIN, USBMINUS ; <-- sample - rjmp foundK - sbis USBIN, USBMINUS ; <-- sample - rjmp foundK - sbis USBIN, USBMINUS ; <-- sample - rjmp foundK -#if USB_COUNT_SOF - lds YL, usbSofCount - inc YL - sts usbSofCount, YL -#endif /* USB_COUNT_SOF */ -#ifdef USB_SOF_HOOK - USB_SOF_HOOK -#endif - rjmp sofError -;------------------------------------------------------------------------------ -; {3, 5} after falling D- edge, average delay: 4 cycles [we want 5 for -; center sampling] -; we have 1 bit time for setup purposes, then sample again. -; Numbers in brackets are cycles from center of first sync (double K) -; bit after the instruction -;------------------------------------------------------------------------------ -foundK: ;- [02] - lds YL, usbInputBufOffset;2 [03+04] tx loop - push YH ;2 [05+06] - clr YH ;1 [07] - subi YL, lo8(-(usbRxBuf)) ;1 [08] [rx loop init] - sbci YH, hi8(-(usbRxBuf)) ;1 [09] [rx loop init] - push shift ;2 [10+11] - ser shift ;1 [12] - sbis USBIN, USBMINUS ;1 [-1] [13] <--sample:we want two bits K (sample 1 cycle too early) - rjmp haveTwoBitsK ;2 [00] [14] - pop shift ;2 [15+16] undo the push from before - pop YH ;2 [17+18] undo the push from before - rjmp waitForK ;2 [19+20] this was not the end of sync, retry -; The entire loop from waitForK until rjmp waitForK above must not exceed two -; bit times (= 20 cycles). - -;---------------------------------------------------------------------------- -; push more registers and initialize values while we sample the first bits: -;---------------------------------------------------------------------------- -haveTwoBitsK: ;- [01] - push x1 ;2 [02+03] - push x2 ;2 [04+05] - push x3 ;2 [06+07] - push bitcnt ;2 [08+09] - in x1, USBIN ;1 [00] [10] <-- sample bit 0 - bst x1, USBMINUS ;1 [01] - bld shift, 0 ;1 [02] - push cnt ;2 [03+04] - ldi cnt, USB_BUFSIZE ;1 [05] - push x4 ;2 [06+07] tx loop - rjmp rxLoop ;2 [08] -;---------------------------------------------------------------------------- -; Receiver loop (numbers in brackets are cycles within byte after instr) -;---------------------------------------------------------------------------- -unstuff0: ;- [07] (branch taken) - andi x3, ~0x01 ;1 [08] - mov x1, x2 ;1 [09] x2 contains last sampled (stuffed) bit - in x2, USBIN ;1 [00] [10] <-- sample bit 1 again - andi x2, USBMASK ;1 [01] - breq se0Hop ;1 [02] SE0 check for bit 1 - ori shift, 0x01 ;1 [03] 0b00000001 - nop ;1 [04] - rjmp didUnstuff0 ;2 [05] -;----------------------------------------------------- -unstuff1: ;- [05] (branch taken) - mov x2, x1 ;1 [06] x1 contains last sampled (stuffed) bit - andi x3, ~0x02 ;1 [07] - ori shift, 0x02 ;1 [08] 0b00000010 - nop ;1 [09] - in x1, USBIN ;1 [00] [10] <-- sample bit 2 again - andi x1, USBMASK ;1 [01] - breq se0Hop ;1 [02] SE0 check for bit 2 - rjmp didUnstuff1 ;2 [03] -;----------------------------------------------------- -unstuff2: ;- [05] (branch taken) - andi x3, ~0x04 ;1 [06] - ori shift, 0x04 ;1 [07] 0b00000100 - mov x1, x2 ;1 [08] x2 contains last sampled (stuffed) bit - nop ;1 [09] - in x2, USBIN ;1 [00] [10] <-- sample bit 3 - andi x2, USBMASK ;1 [01] - breq se0Hop ;1 [02] SE0 check for bit 3 - rjmp didUnstuff2 ;2 [03] -;----------------------------------------------------- -unstuff3: ;- [00] [10] (branch taken) - in x2, USBIN ;1 [01] [11] <-- sample stuffed bit 3 one cycle too late - andi x2, USBMASK ;1 [02] - breq se0Hop ;1 [03] SE0 check for stuffed bit 3 - andi x3, ~0x08 ;1 [04] - ori shift, 0x08 ;1 [05] 0b00001000 - rjmp didUnstuff3 ;2 [06] -;---------------------------------------------------------------------------- -; extra jobs done during bit interval: -; -; bit 0: store, clear [SE0 is unreliable here due to bit dribbling in hubs], -; overflow check, jump to the head of rxLoop -; bit 1: SE0 check -; bit 2: SE0 check, recovery from delay [bit 0 tasks took too long] -; bit 3: SE0 check, recovery from delay [bit 0 tasks took too long] -; bit 4: SE0 check, none -; bit 5: SE0 check, none -; bit 6: SE0 check, none -; bit 7: SE0 check, reconstruct: x3 is 0 at bit locations we changed, 1 at others -;---------------------------------------------------------------------------- -rxLoop: ;- [09] - in x2, USBIN ;1 [00] [10] <-- sample bit 1 (or possibly bit 0 stuffed) - andi x2, USBMASK ;1 [01] - brne SkipSe0Hop ;1 [02] -se0Hop: ;- [02] - rjmp se0 ;2 [03] SE0 check for bit 1 -SkipSe0Hop: ;- [03] - ser x3 ;1 [04] - andi shift, 0xf9 ;1 [05] 0b11111001 - breq unstuff0 ;1 [06] -didUnstuff0: ;- [06] - eor x1, x2 ;1 [07] - bst x1, USBMINUS ;1 [08] - bld shift, 1 ;1 [09] - in x1, USBIN ;1 [00] [10] <-- sample bit 2 (or possibly bit 1 stuffed) - andi x1, USBMASK ;1 [01] - breq se0Hop ;1 [02] SE0 check for bit 2 - andi shift, 0xf3 ;1 [03] 0b11110011 - breq unstuff1 ;1 [04] do remaining work for bit 1 -didUnstuff1: ;- [04] - eor x2, x1 ;1 [05] - bst x2, USBMINUS ;1 [06] - bld shift, 2 ;1 [07] - nop2 ;2 [08+09] - in x2, USBIN ;1 [00] [10] <-- sample bit 3 (or possibly bit 2 stuffed) - andi x2, USBMASK ;1 [01] - breq se0Hop ;1 [02] SE0 check for bit 3 - andi shift, 0xe7 ;1 [03] 0b11100111 - breq unstuff2 ;1 [04] -didUnstuff2: ;- [04] - eor x1, x2 ;1 [05] - bst x1, USBMINUS ;1 [06] - bld shift, 3 ;1 [07] -didUnstuff3: ;- [07] - andi shift, 0xcf ;1 [08] 0b11001111 - breq unstuff3 ;1 [09] - in x1, USBIN ;1 [00] [10] <-- sample bit 4 - andi x1, USBMASK ;1 [01] - breq se0Hop ;1 [02] SE0 check for bit 4 - eor x2, x1 ;1 [03] - bst x2, USBMINUS ;1 [04] - bld shift, 4 ;1 [05] -didUnstuff4: ;- [05] - andi shift, 0x9f ;1 [06] 0b10011111 - breq unstuff4 ;1 [07] - nop2 ;2 [08+09] - in x2, USBIN ;1 [00] [10] <-- sample bit 5 - andi x2, USBMASK ;1 [01] - breq se0 ;1 [02] SE0 check for bit 5 - eor x1, x2 ;1 [03] - bst x1, USBMINUS ;1 [04] - bld shift, 5 ;1 [05] -didUnstuff5: ;- [05] - andi shift, 0x3f ;1 [06] 0b00111111 - breq unstuff5 ;1 [07] - nop2 ;2 [08+09] - in x1, USBIN ;1 [00] [10] <-- sample bit 6 - andi x1, USBMASK ;1 [01] - breq se0 ;1 [02] SE0 check for bit 6 - eor x2, x1 ;1 [03] - bst x2, USBMINUS ;1 [04] - bld shift, 6 ;1 [05] -didUnstuff6: ;- [05] - cpi shift, 0x02 ;1 [06] 0b00000010 - brlo unstuff6 ;1 [07] - nop2 ;2 [08+09] - in x2, USBIN ;1 [00] [10] <-- sample bit 7 - andi x2, USBMASK ;1 [01] - breq se0 ;1 [02] SE0 check for bit 7 - eor x1, x2 ;1 [03] - bst x1, USBMINUS ;1 [04] - bld shift, 7 ;1 [05] -didUnstuff7: ;- [05] - cpi shift, 0x04 ;1 [06] 0b00000100 - brlo unstuff7 ;1 [07] - eor x3, shift ;1 [08] reconstruct: x3 is 0 at bit locations we changed, 1 at others - nop ;1 [09] - in x1, USBIN ;1 [00] [10] <-- sample bit 0 - st y+, x3 ;2 [01+02] store data - eor x2, x1 ;1 [03] - bst x2, USBMINUS ;1 [04] - bld shift, 0 ;1 [05] - subi cnt, 1 ;1 [06] - brcs overflow ;1 [07] - rjmp rxLoop ;2 [08] -;----------------------------------------------------- -unstuff4: ;- [08] - andi x3, ~0x10 ;1 [09] - in x1, USBIN ;1 [00] [10] <-- sample stuffed bit 4 - andi x1, USBMASK ;1 [01] - breq se0 ;1 [02] SE0 check for stuffed bit 4 - ori shift, 0x10 ;1 [03] - rjmp didUnstuff4 ;2 [04] -;----------------------------------------------------- -unstuff5: ;- [08] - ori shift, 0x20 ;1 [09] - in x2, USBIN ;1 [00] [10] <-- sample stuffed bit 5 - andi x2, USBMASK ;1 [01] - breq se0 ;1 [02] SE0 check for stuffed bit 5 - andi x3, ~0x20 ;1 [03] - rjmp didUnstuff5 ;2 [04] -;----------------------------------------------------- -unstuff6: ;- [08] - andi x3, ~0x40 ;1 [09] - in x1, USBIN ;1 [00] [10] <-- sample stuffed bit 6 - andi x1, USBMASK ;1 [01] - breq se0 ;1 [02] SE0 check for stuffed bit 6 - ori shift, 0x40 ;1 [03] - rjmp didUnstuff6 ;2 [04] -;----------------------------------------------------- -unstuff7: ;- [08] - andi x3, ~0x80 ;1 [09] - in x2, USBIN ;1 [00] [10] <-- sample stuffed bit 7 - andi x2, USBMASK ;1 [01] - breq se0 ;1 [02] SE0 check for stuffed bit 7 - ori shift, 0x80 ;1 [03] - rjmp didUnstuff7 ;2 [04] - -macro POP_STANDARD ; 16 cycles - pop x4 - pop cnt - pop bitcnt - pop x3 - pop x2 - pop x1 - pop shift - pop YH - endm -macro POP_RETI ; 5 cycles - pop YL - out SREG, YL - pop YL - endm - -#include "asmcommon.inc" - -;--------------------------------------------------------------------------- -; USB spec says: -; idle = J -; J = (D+ = 0), (D- = 1) -; K = (D+ = 1), (D- = 0) -; Spec allows 7.5 bit times from EOP to SOP for replies -;--------------------------------------------------------------------------- -bitstuffN: ;- [04] - eor x1, x4 ;1 [05] - clr x2 ;1 [06] - nop ;1 [07] - rjmp didStuffN ;1 [08] -;--------------------------------------------------------------------------- -bitstuff6: ;- [04] - eor x1, x4 ;1 [05] - clr x2 ;1 [06] - rjmp didStuff6 ;1 [07] -;--------------------------------------------------------------------------- -bitstuff7: ;- [02] - eor x1, x4 ;1 [03] - clr x2 ;1 [06] - nop ;1 [05] - rjmp didStuff7 ;1 [06] -;--------------------------------------------------------------------------- -sendNakAndReti: ;- [-19] - ldi x3, USBPID_NAK ;1 [-18] - rjmp sendX3AndReti ;1 [-17] -;--------------------------------------------------------------------------- -sendAckAndReti: ;- [-17] - ldi cnt, USBPID_ACK ;1 [-16] -sendCntAndReti: ;- [-16] - mov x3, cnt ;1 [-15] -sendX3AndReti: ;- [-15] - ldi YL, 20 ;1 [-14] x3==r20 address is 20 - ldi YH, 0 ;1 [-13] - ldi cnt, 2 ;1 [-12] -; rjmp usbSendAndReti fallthrough -;--------------------------------------------------------------------------- -;usbSend: -;pointer to data in 'Y' -;number of bytes in 'cnt' -- including sync byte [range 2 ... 12] -;uses: x1...x4, btcnt, shift, cnt, Y -;Numbers in brackets are time since first bit of sync pattern is sent -;We need not to match the transfer rate exactly because the spec demands -;only 1.5% precision anyway. -usbSendAndReti: ;- [-13] 13 cycles until SOP - in x2, USBDDR ;1 [-12] - ori x2, USBMASK ;1 [-11] - sbi USBOUT, USBMINUS ;2 [-09-10] prepare idle state; D+ and D- must have been 0 (no pullups) - in x1, USBOUT ;1 [-08] port mirror for tx loop - out USBDDR, x2 ;1 [-07] <- acquire bus - ; need not init x2 (bitstuff history) because sync starts with 0 - ldi x4, USBMASK ;1 [-06] exor mask - ldi shift, 0x80 ;1 [-05] sync byte is first byte sent - ldi bitcnt, 6 ;1 [-04] -txBitLoop: ;- [-04] [06] - sbrs shift, 0 ;1 [-03] [07] - eor x1, x4 ;1 [-02] [08] - ror shift ;1 [-01] [09] -didStuffN: ;- [09] - out USBOUT, x1 ;1 [00] [10] <-- out N - ror x2 ;1 [01] - cpi x2, 0xfc ;1 [02] - brcc bitstuffN ;1 [03] - dec bitcnt ;1 [04] - brne txBitLoop ;1 [05] - sbrs shift, 0 ;1 [06] - eor x1, x4 ;1 [07] - ror shift ;1 [08] -didStuff6: ;- [08] - nop ;1 [09] - out USBOUT, x1 ;1 [00] [10] <-- out 6 - ror x2 ;1 [01] - cpi x2, 0xfc ;1 [02] - brcc bitstuff6 ;1 [03] - sbrs shift, 0 ;1 [04] - eor x1, x4 ;1 [05] - ror shift ;1 [06] - ror x2 ;1 [07] -didStuff7: ;- [07] - ldi bitcnt, 6 ;1 [08] - cpi x2, 0xfc ;1 [09] - out USBOUT, x1 ;1 [00] [10] <-- out 7 - brcc bitstuff7 ;1 [01] - ld shift, y+ ;2 [02+03] - dec cnt ;1 [04] - brne txBitLoop ;1 [05] -makeSE0: - cbr x1, USBMASK ;1 [06] prepare SE0 [spec says EOP may be 19 to 23 cycles] - lds x2, usbNewDeviceAddr;2 [07+08] - lsl x2 ;1 [09] we compare with left shifted address -;2006-03-06: moved transfer of new address to usbDeviceAddr from C-Code to asm: -;set address only after data packet was sent, not after handshake - out USBOUT, x1 ;1 [00] [10] <-- out SE0-- from now 2 bits==20 cycl. until bus idle - subi YL, 20 + 2 ;1 [01] Only assign address on data packets, not ACK/NAK in x3 - sbci YH, 0 ;1 [02] - breq skipAddrAssign ;1 [03] - sts usbDeviceAddr, x2 ;2 [04+05] if not skipped: SE0 is one cycle longer -;---------------------------------------------------------------------------- -;end of usbDeviceAddress transfer -skipAddrAssign: ;- [03/04] - ldi x2, 1< 10.6666666 cycles per bit, 85.333333333 cycles per byte -; Numbers in brackets are clocks counted from center of last sync bit -; when instruction starts - -USB_INTR_VECTOR: -;order of registers pushed: YL, SREG YH, [sofError], bitcnt, shift, x1, x2, x3, x4, cnt - push YL ;[-25] push only what is necessary to sync with edge ASAP - in YL, SREG ;[-23] - push YL ;[-22] - push YH ;[-20] -;---------------------------------------------------------------------------- -; Synchronize with sync pattern: -;---------------------------------------------------------------------------- -;sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K] -;sync up with J to K edge during sync pattern -- use fastest possible loops -;The first part waits at most 1 bit long since we must be in sync pattern. -;YL is guarenteed to be < 0x80 because I flag is clear. When we jump to -;waitForJ, ensure that this prerequisite is met. -waitForJ: - inc YL - sbis USBIN, USBMINUS - brne waitForJ ; just make sure we have ANY timeout -waitForK: -;The following code results in a sampling window of < 1/4 bit which meets the spec. - sbis USBIN, USBMINUS ;[-15] - rjmp foundK ;[-14] - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK -#if USB_COUNT_SOF - lds YL, usbSofCount - inc YL - sts usbSofCount, YL -#endif /* USB_COUNT_SOF */ -#ifdef USB_SOF_HOOK - USB_SOF_HOOK -#endif - rjmp sofError -foundK: ;[-12] -;{3, 5} after falling D- edge, average delay: 4 cycles [we want 5 for center sampling] -;we have 1 bit time for setup purposes, then sample again. Numbers in brackets -;are cycles from center of first sync (double K) bit after the instruction - push bitcnt ;[-12] -; [---] ;[-11] - lds YL, usbInputBufOffset;[-10] -; [---] ;[-9] - clr YH ;[-8] - subi YL, lo8(-(usbRxBuf));[-7] [rx loop init] - sbci YH, hi8(-(usbRxBuf));[-6] [rx loop init] - push shift ;[-5] -; [---] ;[-4] - ldi bitcnt, 0x55 ;[-3] [rx loop init] - sbis USBIN, USBMINUS ;[-2] we want two bits K (sample 2 cycles too early) - rjmp haveTwoBitsK ;[-1] - pop shift ;[0] undo the push from before - pop bitcnt ;[2] undo the push from before - rjmp waitForK ;[4] this was not the end of sync, retry -; The entire loop from waitForK until rjmp waitForK above must not exceed two -; bit times (= 21 cycles). - -;---------------------------------------------------------------------------- -; push more registers and initialize values while we sample the first bits: -;---------------------------------------------------------------------------- -haveTwoBitsK: - push x1 ;[1] - push x2 ;[3] - push x3 ;[5] - ldi shift, 0 ;[7] - ldi x3, 1<<4 ;[8] [rx loop init] first sample is inverse bit, compensate that - push x4 ;[9] == leap - - in x1, USBIN ;[11] <-- sample bit 0 - andi x1, USBMASK ;[12] - bst x1, USBMINUS ;[13] - bld shift, 7 ;[14] - push cnt ;[15] - ldi leap, 0 ;[17] [rx loop init] - ldi cnt, USB_BUFSIZE;[18] [rx loop init] - rjmp rxbit1 ;[19] arrives at [21] - -;---------------------------------------------------------------------------- -; Receiver loop (numbers in brackets are cycles within byte after instr) -;---------------------------------------------------------------------------- - -; duration of unstuffing code should be 10.66666667 cycles. We adjust "leap" -; accordingly to approximate this value in the long run. - -unstuff6: - andi x2, USBMASK ;[03] - ori x3, 1<<6 ;[04] will not be shifted any more - andi shift, ~0x80;[05] - mov x1, x2 ;[06] sampled bit 7 is actually re-sampled bit 6 - subi leap, -1 ;[07] total duration = 11 bits -> subtract 1/3 - rjmp didUnstuff6 ;[08] - -unstuff7: - ori x3, 1<<7 ;[09] will not be shifted any more - in x2, USBIN ;[00] [10] re-sample bit 7 - andi x2, USBMASK ;[01] - andi shift, ~0x80;[02] - subi leap, 2 ;[03] total duration = 10 bits -> add 1/3 - rjmp didUnstuff7 ;[04] - -unstuffEven: - ori x3, 1<<6 ;[09] will be shifted right 6 times for bit 0 - in x1, USBIN ;[00] [10] - andi shift, ~0x80;[01] - andi x1, USBMASK ;[02] - breq se0 ;[03] - subi leap, -1 ;[04] total duration = 11 bits -> subtract 1/3 - nop2 ;[05] - rjmp didUnstuffE ;[06] - -unstuffOdd: - ori x3, 1<<5 ;[09] will be shifted right 4 times for bit 1 - in x2, USBIN ;[00] [10] - andi shift, ~0x80;[01] - andi x2, USBMASK ;[02] - breq se0 ;[03] - subi leap, -1 ;[04] total duration = 11 bits -> subtract 1/3 - nop2 ;[05] - rjmp didUnstuffO ;[06] - -rxByteLoop: - andi x1, USBMASK ;[03] - eor x2, x1 ;[04] - subi leap, 1 ;[05] - brpl skipLeap ;[06] - subi leap, -3 ;1 one leap cycle every 3rd byte -> 85 + 1/3 cycles per byte - nop ;1 -skipLeap: - subi x2, 1 ;[08] - ror shift ;[09] -didUnstuff6: - cpi shift, 0xfc ;[10] - in x2, USBIN ;[00] [11] <-- sample bit 7 - brcc unstuff6 ;[01] - andi x2, USBMASK ;[02] - eor x1, x2 ;[03] - subi x1, 1 ;[04] - ror shift ;[05] -didUnstuff7: - cpi shift, 0xfc ;[06] - brcc unstuff7 ;[07] - eor x3, shift ;[08] reconstruct: x3 is 1 at bit locations we changed, 0 at others - st y+, x3 ;[09] store data -rxBitLoop: - in x1, USBIN ;[00] [11] <-- sample bit 0/2/4 - andi x1, USBMASK ;[01] - eor x2, x1 ;[02] - andi x3, 0x3f ;[03] topmost two bits reserved for 6 and 7 - subi x2, 1 ;[04] - ror shift ;[05] - cpi shift, 0xfc ;[06] - brcc unstuffEven ;[07] -didUnstuffE: - lsr x3 ;[08] - lsr x3 ;[09] -rxbit1: - in x2, USBIN ;[00] [10] <-- sample bit 1/3/5 - andi x2, USBMASK ;[01] - breq se0 ;[02] - eor x1, x2 ;[03] - subi x1, 1 ;[04] - ror shift ;[05] - cpi shift, 0xfc ;[06] - brcc unstuffOdd ;[07] -didUnstuffO: - subi bitcnt, 0xab;[08] == addi 0x55, 0x55 = 0x100/3 - brcs rxBitLoop ;[09] - - subi cnt, 1 ;[10] - in x1, USBIN ;[00] [11] <-- sample bit 6 - brcc rxByteLoop ;[01] - rjmp overflow - -macro POP_STANDARD ; 14 cycles - pop cnt - pop x4 - pop x3 - pop x2 - pop x1 - pop shift - pop bitcnt - endm -macro POP_RETI ; 7 cycles - pop YH - pop YL - out SREG, YL - pop YL - endm - -#include "asmcommon.inc" - -; USB spec says: -; idle = J -; J = (D+ = 0), (D- = 1) -; K = (D+ = 1), (D- = 0) -; Spec allows 7.5 bit times from EOP to SOP for replies - -bitstuffN: - eor x1, x4 ;[5] - ldi x2, 0 ;[6] - nop2 ;[7] - nop ;[9] - out USBOUT, x1 ;[10] <-- out - rjmp didStuffN ;[0] - -bitstuff6: - eor x1, x4 ;[5] - ldi x2, 0 ;[6] Carry is zero due to brcc - rol shift ;[7] compensate for ror shift at branch destination - rjmp didStuff6 ;[8] - -bitstuff7: - ldi x2, 0 ;[2] Carry is zero due to brcc - rjmp didStuff7 ;[3] - - -sendNakAndReti: - ldi x3, USBPID_NAK ;[-18] - rjmp sendX3AndReti ;[-17] -sendAckAndReti: - ldi cnt, USBPID_ACK ;[-17] -sendCntAndReti: - mov x3, cnt ;[-16] -sendX3AndReti: - ldi YL, 20 ;[-15] x3==r20 address is 20 - ldi YH, 0 ;[-14] - ldi cnt, 2 ;[-13] -; rjmp usbSendAndReti fallthrough - -;usbSend: -;pointer to data in 'Y' -;number of bytes in 'cnt' -- including sync byte [range 2 ... 12] -;uses: x1...x4, btcnt, shift, cnt, Y -;Numbers in brackets are time since first bit of sync pattern is sent -;We don't match the transfer rate exactly (don't insert leap cycles every third -;byte) because the spec demands only 1.5% precision anyway. -usbSendAndReti: ; 12 cycles until SOP - in x2, USBDDR ;[-12] - ori x2, USBMASK ;[-11] - sbi USBOUT, USBMINUS;[-10] prepare idle state; D+ and D- must have been 0 (no pullups) - in x1, USBOUT ;[-8] port mirror for tx loop - out USBDDR, x2 ;[-7] <- acquire bus -; need not init x2 (bitstuff history) because sync starts with 0 - ldi x4, USBMASK ;[-6] exor mask - ldi shift, 0x80 ;[-5] sync byte is first byte sent -txByteLoop: - ldi bitcnt, 0x35 ;[-4] [6] binary 0011 0101 -txBitLoop: - sbrs shift, 0 ;[-3] [7] - eor x1, x4 ;[-2] [8] - out USBOUT, x1 ;[-1] [9] <-- out N - ror shift ;[0] [10] - ror x2 ;[1] -didStuffN: - cpi x2, 0xfc ;[2] - brcc bitstuffN ;[3] - lsr bitcnt ;[4] - brcc txBitLoop ;[5] - brne txBitLoop ;[6] - - sbrs shift, 0 ;[7] - eor x1, x4 ;[8] -didStuff6: - out USBOUT, x1 ;[-1] [9] <-- out 6 - ror shift ;[0] [10] - ror x2 ;[1] - cpi x2, 0xfc ;[2] - brcc bitstuff6 ;[3] - ror shift ;[4] -didStuff7: - ror x2 ;[5] - sbrs x2, 7 ;[6] - eor x1, x4 ;[7] - nop ;[8] - cpi x2, 0xfc ;[9] - out USBOUT, x1 ;[-1][10] <-- out 7 - brcc bitstuff7 ;[0] [11] - ld shift, y+ ;[1] - dec cnt ;[3] - brne txByteLoop ;[4] -;make SE0: - cbr x1, USBMASK ;[5] prepare SE0 [spec says EOP may be 21 to 25 cycles] - lds x2, usbNewDeviceAddr;[6] - lsl x2 ;[8] we compare with left shifted address - subi YL, 20 + 2 ;[9] Only assign address on data packets, not ACK/NAK in x3 - sbci YH, 0 ;[10] - out USBOUT, x1 ;[11] <-- out SE0 -- from now 2 bits = 22 cycles until bus idle -;2006-03-06: moved transfer of new address to usbDeviceAddr from C-Code to asm: -;set address only after data packet was sent, not after handshake - breq skipAddrAssign ;[0] - sts usbDeviceAddr, x2; if not skipped: SE0 is one cycle longer -skipAddrAssign: -;end of usbDeviceAddress transfer - ldi x2, 1< max 52 cycles interrupt disable -;max stack usage: [ret(2), r0, SREG, YL, YH, shift, x1, x2, x3, x4, cnt] = 12 bytes -;nominal frequency: 16.5 MHz -> 11 cycles per bit -; 16.3125 MHz < F_CPU < 16.6875 MHz (+/- 1.1%) -; Numbers in brackets are clocks counted from center of last sync bit -; when instruction starts - - -USB_INTR_VECTOR: -;order of registers pushed: YL, SREG [sofError], r0, YH, shift, x1, x2, x3, x4, cnt - push YL ;[-23] push only what is necessary to sync with edge ASAP - in YL, SREG ;[-21] - push YL ;[-20] -;---------------------------------------------------------------------------- -; Synchronize with sync pattern: -;---------------------------------------------------------------------------- -;sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K] -;sync up with J to K edge during sync pattern -- use fastest possible loops -;The first part waits at most 1 bit long since we must be in sync pattern. -;YL is guarenteed to be < 0x80 because I flag is clear. When we jump to -;waitForJ, ensure that this prerequisite is met. -waitForJ: - inc YL - sbis USBIN, USBMINUS - brne waitForJ ; just make sure we have ANY timeout -waitForK: -;The following code results in a sampling window of < 1/4 bit which meets the spec. - sbis USBIN, USBMINUS ;[-15] - rjmp foundK ;[-14] - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK -#if USB_COUNT_SOF - lds YL, usbSofCount - inc YL - sts usbSofCount, YL -#endif /* USB_COUNT_SOF */ -#ifdef USB_SOF_HOOK - USB_SOF_HOOK -#endif - rjmp sofError -foundK: ;[-12] -;{3, 5} after falling D- edge, average delay: 4 cycles [we want 5 for center sampling] -;we have 1 bit time for setup purposes, then sample again. Numbers in brackets -;are cycles from center of first sync (double K) bit after the instruction - push r0 ;[-12] -; [---] ;[-11] - push YH ;[-10] -; [---] ;[-9] - lds YL, usbInputBufOffset;[-8] -; [---] ;[-7] - clr YH ;[-6] - subi YL, lo8(-(usbRxBuf));[-5] [rx loop init] - sbci YH, hi8(-(usbRxBuf));[-4] [rx loop init] - mov r0, x2 ;[-3] [rx loop init] - sbis USBIN, USBMINUS ;[-2] we want two bits K (sample 2 cycles too early) - rjmp haveTwoBitsK ;[-1] - pop YH ;[0] undo the pushes from before - pop r0 ;[2] - rjmp waitForK ;[4] this was not the end of sync, retry -; The entire loop from waitForK until rjmp waitForK above must not exceed two -; bit times (= 22 cycles). - -;---------------------------------------------------------------------------- -; push more registers and initialize values while we sample the first bits: -;---------------------------------------------------------------------------- -haveTwoBitsK: ;[1] - push shift ;[1] - push x1 ;[3] - push x2 ;[5] - push x3 ;[7] - ldi shift, 0xff ;[9] [rx loop init] - ori x3, 0xff ;[10] [rx loop init] == ser x3, clear zero flag - - in x1, USBIN ;[11] <-- sample bit 0 - bst x1, USBMINUS ;[12] - bld shift, 0 ;[13] - push x4 ;[14] == phase -; [---] ;[15] - push cnt ;[16] -; [---] ;[17] - ldi phase, 0 ;[18] [rx loop init] - ldi cnt, USB_BUFSIZE;[19] [rx loop init] - rjmp rxbit1 ;[20] -; [---] ;[21] - -;---------------------------------------------------------------------------- -; Receiver loop (numbers in brackets are cycles within byte after instr) -;---------------------------------------------------------------------------- -/* -byte oriented operations done during loop: -bit 0: store data -bit 1: SE0 check -bit 2: overflow check -bit 3: catch up -bit 4: rjmp to achieve conditional jump range -bit 5: PLL -bit 6: catch up -bit 7: jump, fixup bitstuff -; 87 [+ 2] cycles ------------------------------------------------------------------- -*/ -continueWithBit5: - in x2, USBIN ;[055] <-- bit 5 - eor r0, x2 ;[056] - or phase, r0 ;[057] - sbrc phase, USBMINUS ;[058] - lpm ;[059] optional nop3; modifies r0 - in phase, USBIN ;[060] <-- phase - eor x1, x2 ;[061] - bst x1, USBMINUS ;[062] - bld shift, 5 ;[063] - andi shift, 0x3f ;[064] - in x1, USBIN ;[065] <-- bit 6 - breq unstuff5 ;[066] *** unstuff escape - eor phase, x1 ;[067] - eor x2, x1 ;[068] - bst x2, USBMINUS ;[069] - bld shift, 6 ;[070] -didUnstuff6: ;[ ] - in r0, USBIN ;[071] <-- phase - cpi shift, 0x02 ;[072] - brlo unstuff6 ;[073] *** unstuff escape -didUnstuff5: ;[ ] - nop2 ;[074] -; [---] ;[075] - in x2, USBIN ;[076] <-- bit 7 - eor x1, x2 ;[077] - bst x1, USBMINUS ;[078] - bld shift, 7 ;[079] -didUnstuff7: ;[ ] - eor r0, x2 ;[080] - or phase, r0 ;[081] - in r0, USBIN ;[082] <-- phase - cpi shift, 0x04 ;[083] - brsh rxLoop ;[084] -; [---] ;[085] -unstuff7: ;[ ] - andi x3, ~0x80 ;[085] - ori shift, 0x80 ;[086] - in x2, USBIN ;[087] <-- sample stuffed bit 7 - nop ;[088] - rjmp didUnstuff7 ;[089] -; [---] ;[090] - ;[080] - -unstuff5: ;[067] - eor phase, x1 ;[068] - andi x3, ~0x20 ;[069] - ori shift, 0x20 ;[070] - in r0, USBIN ;[071] <-- phase - mov x2, x1 ;[072] - nop ;[073] - nop2 ;[074] -; [---] ;[075] - in x1, USBIN ;[076] <-- bit 6 - eor r0, x1 ;[077] - or phase, r0 ;[078] - eor x2, x1 ;[079] - bst x2, USBMINUS ;[080] - bld shift, 6 ;[081] no need to check bitstuffing, we just had one - in r0, USBIN ;[082] <-- phase - rjmp didUnstuff5 ;[083] -; [---] ;[084] - ;[074] - -unstuff6: ;[074] - andi x3, ~0x40 ;[075] - in x1, USBIN ;[076] <-- bit 6 again - ori shift, 0x40 ;[077] - nop2 ;[078] -; [---] ;[079] - rjmp didUnstuff6 ;[080] -; [---] ;[081] - ;[071] - -unstuff0: ;[013] - eor r0, x2 ;[014] - or phase, r0 ;[015] - andi x2, USBMASK ;[016] check for SE0 - in r0, USBIN ;[017] <-- phase - breq didUnstuff0 ;[018] direct jump to se0 would be too long - andi x3, ~0x01 ;[019] - ori shift, 0x01 ;[020] - mov x1, x2 ;[021] mov existing sample - in x2, USBIN ;[022] <-- bit 1 again - rjmp didUnstuff0 ;[023] -; [---] ;[024] - ;[014] - -unstuff1: ;[024] - eor r0, x1 ;[025] - or phase, r0 ;[026] - andi x3, ~0x02 ;[027] - in r0, USBIN ;[028] <-- phase - ori shift, 0x02 ;[029] - mov x2, x1 ;[030] - rjmp didUnstuff1 ;[031] -; [---] ;[032] - ;[022] - -unstuff2: ;[035] - eor r0, x2 ;[036] - or phase, r0 ;[037] - andi x3, ~0x04 ;[038] - in r0, USBIN ;[039] <-- phase - ori shift, 0x04 ;[040] - mov x1, x2 ;[041] - rjmp didUnstuff2 ;[042] -; [---] ;[043] - ;[033] - -unstuff3: ;[043] - in x2, USBIN ;[044] <-- bit 3 again - eor r0, x2 ;[045] - or phase, r0 ;[046] - andi x3, ~0x08 ;[047] - ori shift, 0x08 ;[048] - nop ;[049] - in r0, USBIN ;[050] <-- phase - rjmp didUnstuff3 ;[051] -; [---] ;[052] - ;[042] - -unstuff4: ;[053] - andi x3, ~0x10 ;[054] - in x1, USBIN ;[055] <-- bit 4 again - ori shift, 0x10 ;[056] - rjmp didUnstuff4 ;[057] -; [---] ;[058] - ;[048] - -rxLoop: ;[085] - eor x3, shift ;[086] reconstruct: x3 is 0 at bit locations we changed, 1 at others - in x1, USBIN ;[000] <-- bit 0 - st y+, x3 ;[001] -; [---] ;[002] - eor r0, x1 ;[003] - or phase, r0 ;[004] - eor x2, x1 ;[005] - in r0, USBIN ;[006] <-- phase - ser x3 ;[007] - bst x2, USBMINUS ;[008] - bld shift, 0 ;[009] - andi shift, 0xf9 ;[010] -rxbit1: ;[ ] - in x2, USBIN ;[011] <-- bit 1 - breq unstuff0 ;[012] *** unstuff escape - andi x2, USBMASK ;[013] SE0 check for bit 1 -didUnstuff0: ;[ ] Z only set if we detected SE0 in bitstuff - breq se0 ;[014] - eor r0, x2 ;[015] - or phase, r0 ;[016] - in r0, USBIN ;[017] <-- phase - eor x1, x2 ;[018] - bst x1, USBMINUS ;[019] - bld shift, 1 ;[020] - andi shift, 0xf3 ;[021] -didUnstuff1: ;[ ] - in x1, USBIN ;[022] <-- bit 2 - breq unstuff1 ;[023] *** unstuff escape - eor r0, x1 ;[024] - or phase, r0 ;[025] - subi cnt, 1 ;[026] overflow check - brcs overflow ;[027] - in r0, USBIN ;[028] <-- phase - eor x2, x1 ;[029] - bst x2, USBMINUS ;[030] - bld shift, 2 ;[031] - andi shift, 0xe7 ;[032] -didUnstuff2: ;[ ] - in x2, USBIN ;[033] <-- bit 3 - breq unstuff2 ;[034] *** unstuff escape - eor r0, x2 ;[035] - or phase, r0 ;[036] - eor x1, x2 ;[037] - bst x1, USBMINUS ;[038] - in r0, USBIN ;[039] <-- phase - bld shift, 3 ;[040] - andi shift, 0xcf ;[041] -didUnstuff3: ;[ ] - breq unstuff3 ;[042] *** unstuff escape - nop ;[043] - in x1, USBIN ;[044] <-- bit 4 - eor x2, x1 ;[045] - bst x2, USBMINUS ;[046] - bld shift, 4 ;[047] -didUnstuff4: ;[ ] - eor r0, x1 ;[048] - or phase, r0 ;[049] - in r0, USBIN ;[050] <-- phase - andi shift, 0x9f ;[051] - breq unstuff4 ;[052] *** unstuff escape - rjmp continueWithBit5;[053] -; [---] ;[054] - -macro POP_STANDARD ; 16 cycles - pop cnt - pop x4 - pop x3 - pop x2 - pop x1 - pop shift - pop YH - pop r0 - endm -macro POP_RETI ; 5 cycles - pop YL - out SREG, YL - pop YL - endm - -#include "asmcommon.inc" - - -; USB spec says: -; idle = J -; J = (D+ = 0), (D- = 1) -; K = (D+ = 1), (D- = 0) -; Spec allows 7.5 bit times from EOP to SOP for replies - -bitstuff7: - eor x1, x4 ;[4] - ldi x2, 0 ;[5] - nop2 ;[6] C is zero (brcc) - rjmp didStuff7 ;[8] - -bitstuffN: - eor x1, x4 ;[5] - ldi x2, 0 ;[6] - lpm ;[7] 3 cycle NOP, modifies r0 - out USBOUT, x1 ;[10] <-- out - rjmp didStuffN ;[0] - -#define bitStatus x3 - -sendNakAndReti: - ldi cnt, USBPID_NAK ;[-19] - rjmp sendCntAndReti ;[-18] -sendAckAndReti: - ldi cnt, USBPID_ACK ;[-17] -sendCntAndReti: - mov r0, cnt ;[-16] - ldi YL, 0 ;[-15] R0 address is 0 - ldi YH, 0 ;[-14] - ldi cnt, 2 ;[-13] -; rjmp usbSendAndReti fallthrough - -;usbSend: -;pointer to data in 'Y' -;number of bytes in 'cnt' -- including sync byte [range 2 ... 12] -;uses: x1...x4, shift, cnt, Y -;Numbers in brackets are time since first bit of sync pattern is sent -usbSendAndReti: ; 12 cycles until SOP - in x2, USBDDR ;[-12] - ori x2, USBMASK ;[-11] - sbi USBOUT, USBMINUS;[-10] prepare idle state; D+ and D- must have been 0 (no pullups) - in x1, USBOUT ;[-8] port mirror for tx loop - out USBDDR, x2 ;[-7] <- acquire bus -; need not init x2 (bitstuff history) because sync starts with 0 - ldi x4, USBMASK ;[-6] exor mask - ldi shift, 0x80 ;[-5] sync byte is first byte sent - ldi bitStatus, 0xff ;[-4] init bit loop counter, works for up to 12 bytes -byteloop: -bitloop: - sbrs shift, 0 ;[8] [-3] - eor x1, x4 ;[9] [-2] - out USBOUT, x1 ;[10] [-1] <-- out - ror shift ;[0] - ror x2 ;[1] -didStuffN: - cpi x2, 0xfc ;[2] - brcc bitstuffN ;[3] - nop ;[4] - subi bitStatus, 37 ;[5] 256 / 7 ~=~ 37 - brcc bitloop ;[6] when we leave the loop, bitStatus has almost the initial value - sbrs shift, 0 ;[7] - eor x1, x4 ;[8] - ror shift ;[9] -didStuff7: - out USBOUT, x1 ;[10] <-- out - ror x2 ;[0] - cpi x2, 0xfc ;[1] - brcc bitstuff7 ;[2] - ld shift, y+ ;[3] - dec cnt ;[5] - brne byteloop ;[6] -;make SE0: - cbr x1, USBMASK ;[7] prepare SE0 [spec says EOP may be 21 to 25 cycles] - lds x2, usbNewDeviceAddr;[8] - lsl x2 ;[10] we compare with left shifted address - out USBOUT, x1 ;[11] <-- out SE0 -- from now 2 bits = 22 cycles until bus idle -;2006-03-06: moved transfer of new address to usbDeviceAddr from C-Code to asm: -;set address only after data packet was sent, not after handshake - subi YL, 2 ;[0] Only assign address on data packets, not ACK/NAK in r0 - sbci YH, 0 ;[1] - breq skipAddrAssign ;[2] - sts usbDeviceAddr, x2; if not skipped: SE0 is one cycle longer -skipAddrAssign: -;end of usbDeviceAddress transfer - ldi x2, 1< 12 cycles per bit -; Numbers in brackets are clocks counted from center of last sync bit -; when instruction starts -;register use in receive loop to receive the data bytes: -; shift assembles the byte currently being received -; x1 holds the D+ and D- line state -; x2 holds the previous line state -; cnt holds the number of bytes left in the receive buffer -; x3 holds the higher crc byte (see algorithm below) -; x4 is used as temporary register for the crc algorithm -; x5 is used for unstuffing: when unstuffing the last received bit is inverted in shift (to prevent further -; unstuffing calls. In the same time the corresponding bit in x5 is cleared to mark the bit as beening iverted -; zl lower crc value and crc table index -; zh used for crc table accesses - -;-------------------------------------------------------------------------------------------------------------- -; CRC mods: -; table driven crc checker, Z points to table in prog space -; ZL is the lower crc byte, x3 is the higher crc byte -; x4 is used as temp register to store different results -; the initialization of the crc register is not 0xFFFF but 0xFE54. This is because during the receipt of the -; first data byte an virtual zero data byte is added to the crc register, this results in the correct initial -; value of 0xFFFF at beginning of the second data byte before the first data byte is added to the crc. -; The magic number 0xFE54 results form the crc table: At tabH[0x54] = 0xFF = crcH (required) and -; tabL[0x54] = 0x01 -> crcL = 0x01 xor 0xFE = 0xFF -; bitcnt is renamed to x5 and is used for unstuffing purposes, the unstuffing works like in the 12MHz version -;-------------------------------------------------------------------------------------------------------------- -; CRC algorithm: -; The crc register is formed by x3 (higher byte) and ZL (lower byte). The algorithm uses a 'reversed' form -; i.e. that it takes the least significant bit first and shifts to the right. So in fact the highest order -; bit seen from the polynomial devision point of view is the lsb of ZL. (If this sounds strange to you i -; propose a research on CRC :-) ) -; Each data byte received is xored to ZL, the lower crc byte. This byte now builds the crc -; table index. Next the new high byte is loaded from the table and stored in x4 until we have space in x3 -; (its destination). -; Afterwards the lower table is loaded from the table and stored in ZL (the old index is overwritten as -; we don't need it anymore. In fact this is a right shift by 8 bits.) Now the old crc high value is xored -; to ZL, this is the second shift of the old crc value. Now x4 (the temp reg) is moved to x3 and the crc -; calculation is done. -; Prior to the first byte the two CRC register have to be initialized to 0xFFFF (as defined in usb spec) -; however the crc engine also runs during the receipt of the first byte, therefore x3 and zl are initialized -; to a magic number which results in a crc value of 0xFFFF after the first complete byte. -; -; This algorithm is split into the extra cycles of the different bits: -; bit7: XOR the received byte to ZL -; bit5: load the new high byte to x4 -; bit6: load the lower xor byte from the table, xor zl and x3, store result in zl (=the new crc low value) -; move x4 (the new high byte) to x3, the crc value is ready -; - - -macro POP_STANDARD ; 18 cycles - pop ZH - pop ZL - pop cnt - pop x5 - pop x3 - pop x2 - pop x1 - pop shift - pop x4 - endm -macro POP_RETI ; 7 cycles - pop YH - pop YL - out SREG, YL - pop YL - endm - -macro CRC_CLEANUP_AND_CHECK - ; the last byte has already been xored with the lower crc byte, we have to do the table lookup and xor - ; x3 is the higher crc byte, zl the lower one - ldi ZH, hi8(usbCrcTableHigh);[+1] get the new high byte from the table - lpm x2, Z ;[+2][+3][+4] - ldi ZH, hi8(usbCrcTableLow);[+5] get the new low xor byte from the table - lpm ZL, Z ;[+6][+7][+8] - eor ZL, x3 ;[+7] xor the old high byte with the value from the table, x2:ZL now holds the crc value - cpi ZL, 0x01 ;[+8] if the crc is ok we have a fixed remainder value of 0xb001 in x2:ZL (see usb spec) - brne ignorePacket ;[+9] detected a crc fault -> paket is ignored and retransmitted by the host - cpi x2, 0xb0 ;[+10] - brne ignorePacket ;[+11] detected a crc fault -> paket is ignored and retransmitted by the host - endm - - -USB_INTR_VECTOR: -;order of registers pushed: YL, SREG, YH, [sofError], x4, shift, x1, x2, x3, x5, cnt, ZL, ZH - push YL ;[-28] push only what is necessary to sync with edge ASAP - in YL, SREG ;[-26] - push YL ;[-25] - push YH ;[-23] -;---------------------------------------------------------------------------- -; Synchronize with sync pattern: -;---------------------------------------------------------------------------- -;sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K] -;sync up with J to K edge during sync pattern -- use fastest possible loops -;The first part waits at most 1 bit long since we must be in sync pattern. -;YL is guarenteed to be < 0x80 because I flag is clear. When we jump to -;waitForJ, ensure that this prerequisite is met. -waitForJ: - inc YL - sbis USBIN, USBMINUS - brne waitForJ ; just make sure we have ANY timeout -waitForK: -;The following code results in a sampling window of < 1/4 bit which meets the spec. - sbis USBIN, USBMINUS ;[-17] - rjmp foundK ;[-16] - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK -#if USB_COUNT_SOF - lds YL, usbSofCount - inc YL - sts usbSofCount, YL -#endif /* USB_COUNT_SOF */ -#ifdef USB_SOF_HOOK - USB_SOF_HOOK -#endif - rjmp sofError -foundK: ;[-15] -;{3, 5} after falling D- edge, average delay: 4 cycles -;bit0 should be at 30 (2.5 bits) for center sampling. Currently at 4 so 26 cylces till bit 0 sample -;use 1 bit time for setup purposes, then sample again. Numbers in brackets -;are cycles from center of first sync (double K) bit after the instruction - push x4 ;[-14] -; [---] ;[-13] - lds YL, usbInputBufOffset;[-12] used to toggle the two usb receive buffers -; [---] ;[-11] - clr YH ;[-10] - subi YL, lo8(-(usbRxBuf));[-9] [rx loop init] - sbci YH, hi8(-(usbRxBuf));[-8] [rx loop init] - push shift ;[-7] -; [---] ;[-6] - ldi shift, 0x80 ;[-5] the last bit is the end of byte marker for the pid receiver loop - clc ;[-4] the carry has to be clear for receipt of pid bit 0 - sbis USBIN, USBMINUS ;[-3] we want two bits K (sample 3 cycles too early) - rjmp haveTwoBitsK ;[-2] - pop shift ;[-1] undo the push from before - pop x4 ;[1] - rjmp waitForK ;[3] this was not the end of sync, retry -; The entire loop from waitForK until rjmp waitForK above must not exceed two -; bit times (= 24 cycles). - -;---------------------------------------------------------------------------- -; push more registers and initialize values while we sample the first bits: -;---------------------------------------------------------------------------- -haveTwoBitsK: - push x1 ;[0] - push x2 ;[2] - push x3 ;[4] crc high byte - ldi x2, 1< jump back and store the byte - ori shift, 0x01 ;[11] invert the last received bit to prevent furhter unstuffing - in x2, USBIN ;[0] we have some free cycles so we could check for bit stuffing errors - andi x5, 0xFE ;[1] mark this bit as inverted (will be corrected before storing shift) - eor x1, x2 ;[2] x1 and x2 have to be different because the stuff bit is always a zero - andi x1, USBMASK ;[3] mask the interesting bits - breq stuffErr ;[4] if the stuff bit is a 1-bit something went wrong - mov x1, x2 ;[5] the next bit expects the last state to be in x1 - rjmp didunstuff0 ;[6] - ;[7] jump delay of rjmp didunstuffX - -unstuff1: ;[11] this is the jump delay of breq unstuffX - in x1, USBIN ;[0] we have some free cycles so we could check for bit stuffing errors - ori shift, 0x02 ;[1] invert the last received bit to prevent furhter unstuffing - andi x5, 0xFD ;[2] mark this bit as inverted (will be corrected before storing shift) - eor x2, x1 ;[3] x1 and x2 have to be different because the stuff bit is always a zero - andi x2, USBMASK ;[4] mask the interesting bits - breq stuffErr ;[5] if the stuff bit is a 1-bit something went wrong - mov x2, x1 ;[6] the next bit expects the last state to be in x2 - nop2 ;[7] - ;[8] - rjmp didunstuff1 ;[9] - ;[10] jump delay of rjmp didunstuffX - -unstuff2: ;[9] this is the jump delay of breq unstuffX - ori shift, 0x04 ;[10] invert the last received bit to prevent furhter unstuffing - andi x5, 0xFB ;[11] mark this bit as inverted (will be corrected before storing shift) - in x2, USBIN ;[0] we have some free cycles so we could check for bit stuffing errors - eor x1, x2 ;[1] x1 and x2 have to be different because the stuff bit is always a zero - andi x1, USBMASK ;[2] mask the interesting bits - breq stuffErr ;[3] if the stuff bit is a 1-bit something went wrong - mov x1, x2 ;[4] the next bit expects the last state to be in x1 - nop2 ;[5] - ;[6] - rjmp didunstuff2 ;[7] - ;[8] jump delay of rjmp didunstuffX - -unstuff3: ;[9] this is the jump delay of breq unstuffX - ori shift, 0x08 ;[10] invert the last received bit to prevent furhter unstuffing - andi x5, 0xF7 ;[11] mark this bit as inverted (will be corrected before storing shift) - in x1, USBIN ;[0] we have some free cycles so we could check for bit stuffing errors - eor x2, x1 ;[1] x1 and x2 have to be different because the stuff bit is always a zero - andi x2, USBMASK ;[2] mask the interesting bits - breq stuffErr ;[3] if the stuff bit is a 1-bit something went wrong - mov x2, x1 ;[4] the next bit expects the last state to be in x2 - nop2 ;[5] - ;[6] - rjmp didunstuff3 ;[7] - ;[8] jump delay of rjmp didunstuffX - - - -; the include has to be here due to branch distance restirctions -#define __USE_CRC__ -#include "asmcommon.inc" - - - -; USB spec says: -; idle = J -; J = (D+ = 0), (D- = 1) -; K = (D+ = 1), (D- = 0) -; Spec allows 7.5 bit times from EOP to SOP for replies -; 7.5 bit times is 90 cycles. ...there is plenty of time - - -sendNakAndReti: - ldi x3, USBPID_NAK ;[-18] - rjmp sendX3AndReti ;[-17] -sendAckAndReti: - ldi cnt, USBPID_ACK ;[-17] -sendCntAndReti: - mov x3, cnt ;[-16] -sendX3AndReti: - ldi YL, 20 ;[-15] x3==r20 address is 20 - ldi YH, 0 ;[-14] - ldi cnt, 2 ;[-13] -; rjmp usbSendAndReti fallthrough - -;usbSend: -;pointer to data in 'Y' -;number of bytes in 'cnt' -- including sync byte [range 2 ... 12] -;uses: x1...x4, btcnt, shift, cnt, Y -;Numbers in brackets are time since first bit of sync pattern is sent - -usbSendAndReti: ; 12 cycles until SOP - in x2, USBDDR ;[-12] - ori x2, USBMASK ;[-11] - sbi USBOUT, USBMINUS;[-10] prepare idle state; D+ and D- must have been 0 (no pullups) - in x1, USBOUT ;[-8] port mirror for tx loop - out USBDDR, x2 ;[-6] <- acquire bus - ldi x2, 0 ;[-6] init x2 (bitstuff history) because sync starts with 0 - ldi x4, USBMASK ;[-5] exor mask - ldi shift, 0x80 ;[-4] sync byte is first byte sent -txByteLoop: - ldi bitcnt, 0x40 ;[-3]=[9] binary 01000000 -txBitLoop: ; the loop sends the first 7 bits of the byte - sbrs shift, 0 ;[-2]=[10] if we have to send a 1 don't change the line state - eor x1, x4 ;[-1]=[11] - out USBOUT, x1 ;[0] - ror shift ;[1] - ror x2 ;[2] transfers the last sent bit to the stuffing history -didStuffN: - nop ;[3] - nop ;[4] - cpi x2, 0xfc ;[5] if we sent six consecutive ones - brcc bitstuffN ;[6] - lsr bitcnt ;[7] - brne txBitLoop ;[8] restart the loop while the 1 is still in the bitcount - -; transmit bit 7 - sbrs shift, 0 ;[9] - eor x1, x4 ;[10] -didStuff7: - ror shift ;[11] - out USBOUT, x1 ;[0] transfer bit 7 to the pins - ror x2 ;[1] move the bit into the stuffing history - cpi x2, 0xfc ;[2] - brcc bitstuff7 ;[3] - ld shift, y+ ;[4] get next byte to transmit - dec cnt ;[5] decrement byte counter - brne txByteLoop ;[7] if we have more bytes start next one - ;[8] branch delay - -;make SE0: - cbr x1, USBMASK ;[8] prepare SE0 [spec says EOP may be 25 to 30 cycles] - lds x2, usbNewDeviceAddr;[9] - lsl x2 ;[11] we compare with left shifted address - out USBOUT, x1 ;[0] <-- out SE0 -- from now 2 bits = 24 cycles until bus idle - subi YL, 20 + 2 ;[1] Only assign address on data packets, not ACK/NAK in x3 - sbci YH, 0 ;[2] -;2006-03-06: moved transfer of new address to usbDeviceAddr from C-Code to asm: -;set address only after data packet was sent, not after handshake - breq skipAddrAssign ;[3] - sts usbDeviceAddr, x2 ; if not skipped: SE0 is one cycle longer -skipAddrAssign: -;end of usbDeviceAddress transfer - ldi x2, 1< -int main (int argc, char **argv) -{ - int i, j; - for (i=0; i<512; i++){ - unsigned short crc = i & 0xff; - for(j=0; j<8; j++) crc = (crc >> 1) ^ ((crc & 1) ? 0xa001 : 0); - if((i & 7) == 0) printf("\n.byte "); - printf("0x%02x, ", (i > 0xff ? (crc >> 8) : crc) & 0xff); - if(i == 255) printf("\n"); - } - return 0; -} - -// Use the following algorithm to compute CRC values: -ushort computeCrc(uchar *msg, uchar msgLen) -{ - uchar i; - ushort crc = 0xffff; - for(i = 0; i < msgLen; i++) - crc = usbCrcTable16[lo8(crc) ^ msg[i]] ^ hi8(crc); - return crc; -} -*/ - -.balign 256 -usbCrcTableLow: -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41 -.byte 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 - -; .balign 256 -usbCrcTableHigh: -.byte 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2 -.byte 0xC6, 0x06, 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04 -.byte 0xCC, 0x0C, 0x0D, 0xCD, 0x0F, 0xCF, 0xCE, 0x0E -.byte 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09, 0x08, 0xC8 -.byte 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A -.byte 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC -.byte 0x14, 0xD4, 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6 -.byte 0xD2, 0x12, 0x13, 0xD3, 0x11, 0xD1, 0xD0, 0x10 -.byte 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3, 0xF2, 0x32 -.byte 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4 -.byte 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE -.byte 0xFA, 0x3A, 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38 -.byte 0x28, 0xE8, 0xE9, 0x29, 0xEB, 0x2B, 0x2A, 0xEA -.byte 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED, 0xEC, 0x2C -.byte 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26 -.byte 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0 -.byte 0xA0, 0x60, 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62 -.byte 0x66, 0xA6, 0xA7, 0x67, 0xA5, 0x65, 0x64, 0xA4 -.byte 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F, 0x6E, 0xAE -.byte 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68 -.byte 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA -.byte 0xBE, 0x7E, 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C -.byte 0xB4, 0x74, 0x75, 0xB5, 0x77, 0xB7, 0xB6, 0x76 -.byte 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71, 0x70, 0xB0 -.byte 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92 -.byte 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54 -.byte 0x9C, 0x5C, 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E -.byte 0x5A, 0x9A, 0x9B, 0x5B, 0x99, 0x59, 0x58, 0x98 -.byte 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B, 0x8A, 0x4A -.byte 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C -.byte 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86 -.byte 0x82, 0x42, 0x43, 0x83, 0x41, 0x81, 0x80, 0x40 - diff --git a/usbdrv/usbdrvasm20.inc b/usbdrv/usbdrvasm20.inc deleted file mode 100644 index 5027edd..0000000 --- a/usbdrv/usbdrvasm20.inc +++ /dev/null @@ -1,359 +0,0 @@ -/* Name: usbdrvasm20.inc - * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers - * Author: Jeroen Benschop - * Based on usbdrvasm16.inc from Christian Starkjohann - * Creation Date: 2008-03-05 - * Tabsize: 4 - * Copyright: (c) 2008 by Jeroen Benschop and OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - */ - -/* Do not link this file! Link usbdrvasm.S instead, which includes the - * appropriate implementation! - */ - -/* -General Description: -This file is the 20 MHz version of the asssembler part of the USB driver. It -requires a 20 MHz crystal (not a ceramic resonator and not a calibrated RC -oscillator). - -See usbdrv.h for a description of the entire driver. - -Since almost all of this code is timing critical, don't change unless you -really know what you are doing! Many parts require not only a maximum number -of CPU cycles, but even an exact number of cycles! -*/ - -#define leap2 x3 -#ifdef __IAR_SYSTEMS_ASM__ -#define nextInst $+2 -#else -#define nextInst .+0 -#endif - -;max stack usage: [ret(2), YL, SREG, YH, bitcnt, shift, x1, x2, x3, x4, cnt] = 12 bytes -;nominal frequency: 20 MHz -> 13.333333 cycles per bit, 106.666667 cycles per byte -; Numbers in brackets are clocks counted from center of last sync bit -; when instruction starts -;register use in receive loop: -; shift assembles the byte currently being received -; x1 holds the D+ and D- line state -; x2 holds the previous line state -; x4 (leap) is used to add a leap cycle once every three bytes received -; X3 (leap2) is used to add a leap cycle once every three stuff bits received -; bitcnt is used to determine when a stuff bit is due -; cnt holds the number of bytes left in the receive buffer - -USB_INTR_VECTOR: -;order of registers pushed: YL, SREG YH, [sofError], bitcnt, shift, x1, x2, x3, x4, cnt - push YL ;[-28] push only what is necessary to sync with edge ASAP - in YL, SREG ;[-26] - push YL ;[-25] - push YH ;[-23] -;---------------------------------------------------------------------------- -; Synchronize with sync pattern: -;---------------------------------------------------------------------------- -;sync byte (D-) pattern LSb to MSb: 01010100 [1 = idle = J, 0 = K] -;sync up with J to K edge during sync pattern -- use fastest possible loops -;The first part waits at most 1 bit long since we must be in sync pattern. -;YL is guarenteed to be < 0x80 because I flag is clear. When we jump to -;waitForJ, ensure that this prerequisite is met. -waitForJ: - inc YL - sbis USBIN, USBMINUS - brne waitForJ ; just make sure we have ANY timeout -waitForK: -;The following code results in a sampling window of < 1/4 bit which meets the spec. - sbis USBIN, USBMINUS ;[-19] - rjmp foundK ;[-18] - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK - sbis USBIN, USBMINUS - rjmp foundK -#if USB_COUNT_SOF - lds YL, usbSofCount - inc YL - sts usbSofCount, YL -#endif /* USB_COUNT_SOF */ -#ifdef USB_SOF_HOOK - USB_SOF_HOOK -#endif - rjmp sofError -foundK: ;[-16] -;{3, 5} after falling D- edge, average delay: 4 cycles -;bit0 should be at 34 for center sampling. Currently at 4 so 30 cylces till bit 0 sample -;use 1 bit time for setup purposes, then sample again. Numbers in brackets -;are cycles from center of first sync (double K) bit after the instruction - push bitcnt ;[-16] -; [---] ;[-15] - lds YL, usbInputBufOffset;[-14] -; [---] ;[-13] - clr YH ;[-12] - subi YL, lo8(-(usbRxBuf));[-11] [rx loop init] - sbci YH, hi8(-(usbRxBuf));[-10] [rx loop init] - push shift ;[-9] -; [---] ;[-8] - ldi shift,0x40 ;[-7] set msb to "1" so processing bit7 can be detected - nop2 ;[-6] -; [---] ;[-5] - ldi bitcnt, 5 ;[-4] [rx loop init] - sbis USBIN, USBMINUS ;[-3] we want two bits K (sample 3 cycles too early) - rjmp haveTwoBitsK ;[-2] - pop shift ;[-1] undo the push from before - pop bitcnt ;[1] - rjmp waitForK ;[3] this was not the end of sync, retry -; The entire loop from waitForK until rjmp waitForK above must not exceed two -; bit times (= 27 cycles). - -;---------------------------------------------------------------------------- -; push more registers and initialize values while we sample the first bits: -;---------------------------------------------------------------------------- -haveTwoBitsK: - push x1 ;[0] - push x2 ;[2] - push x3 ;[4] (leap2) - ldi leap2, 0x55 ;[6] add leap cycle on 2nd,5th,8th,... stuff bit - push x4 ;[7] == leap - ldi leap, 0x55 ;[9] skip leap cycle on 2nd,5th,8th,... byte received - push cnt ;[10] - ldi cnt, USB_BUFSIZE ;[12] [rx loop init] - ldi x2, 1< -#ifndef __IAR_SYSTEMS_ASM__ -# include -#endif - -#define __attribute__(arg) /* not supported on IAR */ - -#ifdef __IAR_SYSTEMS_ASM__ -# define __ASSEMBLER__ /* IAR does not define standard macro for asm */ -#endif - -#ifdef __HAS_ELPM__ -# define PROGMEM __farflash -#else -# define PROGMEM __flash -#endif - -#define USB_READ_FLASH(addr) (*(PROGMEM char *)(addr)) - -/* The following definitions are not needed by the driver, but may be of some - * help if you port a gcc based project to IAR. - */ -#define cli() __disable_interrupt() -#define sei() __enable_interrupt() -#define wdt_reset() __watchdog_reset() -#define _BV(x) (1 << (x)) - -/* assembler compatibility macros */ -#define nop2 rjmp $+2 /* jump to next instruction */ -#define XL r26 -#define XH r27 -#define YL r28 -#define YH r29 -#define ZL r30 -#define ZH r31 -#define lo8(x) LOW(x) -#define hi8(x) (((x)>>8) & 0xff) /* not HIGH to allow XLINK to make a proper range check */ - -/* Depending on the device you use, you may get problems with the way usbdrv.h - * handles the differences between devices. Since IAR does not use #defines - * for MCU registers, we can't check for the existence of a particular - * register with an #ifdef. If the autodetection mechanism fails, include - * definitions for the required USB_INTR_* macros in your usbconfig.h. See - * usbconfig-prototype.h and usbdrv.h for details. - */ - -/* ------------------------------------------------------------------------- */ -#elif __CODEVISIONAVR__ /* check for CodeVision AVR */ -/* ------------------------------------------------------------------------- */ -/* This port is not working (yet) */ - -/* #define F_CPU _MCU_CLOCK_FREQUENCY_ seems to be defined automatically */ - -#include -#include - -#define __attribute__(arg) /* not supported on IAR */ - -#define PROGMEM __flash -#define USB_READ_FLASH(addr) (*(PROGMEM char *)(addr)) - -#ifndef __ASSEMBLER__ -static inline void cli(void) -{ - #asm("cli"); -} -static inline void sei(void) -{ - #asm("sei"); -} -#endif -#define _delay_ms(t) delay_ms(t) -#define _BV(x) (1 << (x)) -#define USB_CFG_USE_SWITCH_STATEMENT 1 /* macro for if() cascase fails for unknown reason */ - -#define macro .macro -#define endm .endmacro -#define nop2 rjmp .+0 /* jump to next instruction */ - -/* ------------------------------------------------------------------------- */ -#else /* default development environment is avr-gcc/avr-libc */ -/* ------------------------------------------------------------------------- */ - -#include -#ifdef __ASSEMBLER__ -# define _VECTOR(N) __vector_ ## N /* io.h does not define this for asm */ -#else -# include -#endif - -#if USB_CFG_DRIVER_FLASH_PAGE -# define USB_READ_FLASH(addr) pgm_read_byte_far(((long)USB_CFG_DRIVER_FLASH_PAGE << 16) | (long)(addr)) -#else -# define USB_READ_FLASH(addr) pgm_read_byte(addr) -#endif - -#define macro .macro -#define endm .endm -#define nop2 rjmp .+0 /* jump to next instruction */ - -#endif /* development environment */ - -/* for conveniecne, ensure that PRG_RDB exists */ -#ifndef PRG_RDB -# define PRG_RDB(addr) USB_READ_FLASH(addr) -#endif -#endif /* __usbportability_h_INCLUDED__ */ -- cgit v1.2.3