at first i want to appologize, if my english is not the very best, its not my navie language.
I already posted my Problem on a german - speaking board, but it seems noone has a clue about the misake i made.Mikrocontroller.net
I followed the V-USB Tutorial on http://codeandlife.com and accomplished part 1-3 successfull. Now I wanted to try to send random char[16] to my attiny2313 and recive them back.
This is the code I've used:
Code: Select all
static uchar replyBuf[16] = "Hello, USB!";
static uchar reciveBuf[16] = {"TEST"};
static uchar dataReceived = 0, dataLength = 0; // for USB_DATA_IN
USB_PUBLIC uchar usbFunctionSetup(uchar data[8])
{
usbRequest_t *rq = (void *)data; // cast data to correct type
switch(rq->bRequest)
{
// custom command is in the bRequest field
case USB_LED_ON:
PORTB |= (1<<PB0); // turn LED on
return 0;
case USB_LED_OFF:
PORTB &= ~(1<<PB0); // turn LED off
return 0;
case USB_DATA_OUT:
usbMsgPtr = replyBuf;
return sizeof(replyBuf);
case USB_DATA_WRITE:
dataLength = (uchar)rq->wLength.word;
dataReceived = 0;
if(dataLength > sizeof(reciveBuf))
{dataLength = sizeof(reciveBuf);} //setzte wieviele Bytes empfangen werden können
return USB_NO_MSG; // ruft usbFunctionWrite auf
//return 0xFF;
case USB_DATA_ACT:
for(uint8_t i = 0; i<16; i++)
{
replyBuf[i]=reciveBuf[i];
}
return 0;
}
return 0; // should not get here
}
///
USB_PUBLIC uchar usbFunctionWrite(uchar *data, uchar len) {
uchar i;
PORTB ^= (1<<PB1); // to indicate the function got called
for(i = 0; dataReceived < dataLength && i < len; i++, dataReceived++)
reciveBuf[dataReceived] = data[i];
return (dataReceived == dataLength); // 1 if we received it all, 0 if not
}
On the pc-side I've used following code
Code: Select all
// int main...
using namespace std;
int wtd;
bool loop = true;
usb_dev_handle *handle = NULL;
int nBytes = 0;
char buffer[256];
char inputbuffer[16] = {"hl"}
///...
while(loop)
{
printf("\n\n\n\n\n0 : LED an\n1 : LED aus\n2 : Daten Ausgeben\n3 : Daten Schreiben\n4 : AusgabePuffer aktualisieren\n5 : Programm Beenden\n\n");
printf("Ihre Wahl?: ");
cin >> wtd;
nBytes = -1;
switch(wtd){
case USB_LED_OFF : nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, USB_LED_ON , 0, 0, (char *)buffer, sizeof(buffer), 5000); continue;
case USB_LED_ON : nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, USB_LED_OFF , 0, 0, (char *)buffer, sizeof(buffer), 5000); continue;
case USB_DATA_OUT : nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, USB_DATA_OUT , 0, 0, (char *)buffer, sizeof(buffer), 5000);
printf("\nEmpfangene Bytes: %d \nInhalt: %s\n", nBytes, buffer); continue;
case USB_DATA_WRITE : cin >> inputbuffer;
cout << endl << "Ihre Eingabe: " << inputbuffer << endl;
nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, USB_DATA_WRITE, 0, 0, inputbuffer, strlen(inputbuffer)+1, 5000); continue;
case USB_DATA_ACT : nBytes = usb_control_msg(handle, USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN, USB_DATA_ACT , 0, 0, (char *)buffer, sizeof(buffer), 5000); continue;
case 5 : loop = false; nBytes = 0; break;
}
if(nBytes < 0) // fehlerbehandlung
{
fprintf(stderr, "USB error: %sn", usb_strerror());
}
}The problem is, the usbFunctionWrite doesnt get called...