pc can read and write \o/

2 files changed, 36 insertions, 2 deletions

diff --git a/main.c b/main.c
index f7c8756..a3d1b28 100644
--- a/main.c
+++ b/main.c
@@ -6,11 +6,17 @@
 #include <avr/interrupt.h>
 #include "usbdrv/usbdrv.h"
 
-
+static uchar replyBuf[18]= "Hello, World!";
 
 /* device is detected, however unreliably. dunno why. */
 
+static uchar dataReceived, dataLength;
 
+void debug(int i)
+{
+	if (i >= 63) i=63;
+	PORTB = ~i;
+}
 
 USB_PUBLIC uchar usbFunctionSetup(uchar data[8])
 {
@@ -20,12 +26,40 @@ USB_PUBLIC uchar usbFunctionSetup(uchar data[8])
 	{
 		case 0: PORTB |= 1; break;
 		case 1: PORTB &= ~1; break;
+
+		case 2: usbMsgPtr = replyBuf; return sizeof(replyBuf); // pc reads
+		case 3: // alter byte
+			PORTB = ~(rq->wIndex.word & 0xFF);
+			if ((rq->wIndex.word >= 0) && (rq->wIndex.word < sizeof(replyBuf)))
+			{
+				replyBuf[rq->wIndex.word] = rq->wValue.word;
+			}
+			break;
+		case 4: // pc writes
+			dataLength = rq->wLength.word;
+			debug(dataLength);
+			dataReceived = 0;
+
+			return USB_NO_MSG;
+			
 	}
 
 	return 0;
 }
 
 
+USB_PUBLIC uchar usbFunctionWrite(uchar* data, uchar len)
+{
+  PORTB&=~32;
+  for (uchar i = 0; dataReceived < dataLength && i < len; i++, dataReceived++)
+  {
+  	if (0 <= dataReceived && dataReceived < sizeof(replyBuf))
+		replyBuf[dataReceived] = data[i];
+  }
+
+  return (dataReceived >= dataLength);
+}
+
 
 int main (void)
 {
diff --git a/usbdrv/usbconfig.h b/usbdrv/usbconfig.h
index 858c95d..48d4a93 100644
--- a/usbdrv/usbconfig.h
+++ b/usbdrv/usbconfig.h
@@ -123,7 +123,7 @@ section at the end of this file).
  * The value is in milliamperes. [It will be divided by two since USB
  * communicates power requirements in units of 2 mA.]
  */
-#define USB_CFG_IMPLEMENT_FN_WRITE      0
+#define USB_CFG_IMPLEMENT_FN_WRITE      1
 /* Set this to 1 if you want usbFunctionWrite() to be called for control-out
  * transfers. Set it to 0 if you don't need it and want to save a couple of
  * bytes.