diff options
Diffstat (limited to 'pc-client.c')
| -rw-r--r-- | pc-client.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/pc-client.c b/pc-client.c new file mode 100644 index 0000000..1b6cb21 --- /dev/null +++ b/pc-client.c @@ -0,0 +1,159 @@ +#include <string.h> +#include <usb.h> +#include <stdio.h> +#include <stdlib.h> + + +#define USB_LED_OFF 0 +#define USB_LED_ON 1 + + +/* Used to get descriptor strings for device identification */ +static int usbGetDescriptorString(usb_dev_handle *dev, int index, int langid, + char *buf, int buflen) { + char buffer[256]; + int rval, i; + + // make standard request GET_DESCRIPTOR, type string and given index + // (e.g. dev->iProduct) + rval = usb_control_msg(dev, + USB_TYPE_STANDARD | USB_RECIP_DEVICE | USB_ENDPOINT_IN, + USB_REQ_GET_DESCRIPTOR, (USB_DT_STRING << 8) + index, langid, + buffer, sizeof(buffer), 1000); + + if(rval < 0) // error + return rval; + + // rval should be bytes read, but buffer[0] contains the actual response size + if((unsigned char)buffer[0] < rval) + rval = (unsigned char)buffer[0]; // string is shorter than bytes read + + if(buffer[1] != USB_DT_STRING) // second byte is the data type + return 0; // invalid return type + + // we're dealing with UTF-16LE here so actual chars is half of rval, + // and index 0 doesn't count + rval /= 2; + + /* lossy conversion to ISO Latin1 */ + for(i = 1; i < rval && i < buflen; i++) { + if(buffer[2 * i + 1] == 0) + buf[i-1] = buffer[2 * i]; + else + buf[i-1] = '?'; /* outside of ISO Latin1 range */ + } + buf[i-1] = 0; + + return i-1; +} + +static usb_dev_handle * usbOpenDevice(int vendor, char *vendorName, + int product, char *productName) { + struct usb_bus *bus; + struct usb_device *dev; + char devVendor[256], devProduct[256]; + + usb_dev_handle * handle = NULL; + + usb_init(); + usb_find_busses(); + usb_find_devices(); + + for(bus=usb_get_busses(); bus; bus=bus->next) { + for(dev=bus->devices; dev; dev=dev->next) { + if(dev->descriptor.idVendor != vendor || + dev->descriptor.idProduct != product) + continue; + + /* we need to open the device in order to query strings */ + if(!(handle = usb_open(dev))) { + fprintf(stderr, "Warning: cannot open USB device: %s\n", + usb_strerror()); + continue; + } + + /* get vendor name */ + if(usbGetDescriptorString(handle, dev->descriptor.iManufacturer, + 0x0409, devVendor, sizeof(devVendor)) < 0) { + fprintf(stderr, + "Warning: cannot query manufacturer for device: %s\n", + usb_strerror()); + usb_close(handle); + continue; + } + + /* get product name */ + if(usbGetDescriptorString(handle, dev->descriptor.iProduct, + 0x0409, devProduct, sizeof(devVendor)) < 0) { + fprintf(stderr, + "Warning: cannot query product for device: %s\n", + usb_strerror()); + usb_close(handle); + continue; + } + + if(strcmp(devVendor, vendorName) == 0 && + strcmp(devProduct, productName) == 0) + return handle; + else + usb_close(handle); + } + } + + return NULL; +} + +int main(int argc, char **argv) { + usb_dev_handle *handle = NULL; + int nBytes = 0; + char buffer[256]; + + if(argc < 2) { + printf("Usage:\n"); + printf("usbtext.exe on\n"); + printf("usbtext.exe off\n"); + exit(1); + } + + handle = usbOpenDevice(0x16C0, "windfisch.org", 0x05DC, "Flo Test"); + + if(handle == NULL) { + fprintf(stderr, "Could not find USB device!\n"); + exit(1); + } + + if(strcmp(argv[1], "on") == 0) { + nBytes = usb_control_msg(handle, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, + USB_LED_ON, 0, 0, (char *)buffer, sizeof(buffer), 5000); + } else if(strcmp(argv[1], "off") == 0) { + nBytes = usb_control_msg(handle, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, + USB_LED_OFF, 0, 0, (char *)buffer, sizeof(buffer), 5000); + } else if (strcmp(argv[1], "read") == 0) { + char buffer[1024]; + nBytes = usb_control_msg(handle, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, + 2, 0, 0, buffer, sizeof(buffer), 5000); + printf("received %i bytes: %s\n", nBytes, buffer); + } else if (strcmp(argv[1], "change") == 0) { + nBytes = usb_control_msg(handle, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, + 3, 32, 4, buffer, sizeof(buffer), 5000); + buffer[nBytes]=0; + printf("received %i bytes: %s\n", nBytes, buffer); + } else if (strcmp(argv[1], "write") == 0) { + nBytes = usb_control_msg(handle, + USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_OUT, + 4, 0, 0, argv[2], strlen(argv[2])+1, 5000); + buffer[nBytes]=0; + printf("received %i bytes: %s\n", nBytes, buffer); + } + + if(nBytes < 0) + fprintf(stderr, "USB error: %s\n", usb_strerror()); + + usb_close(handle); + + return 0; +} |