Posted on May 17, 2011 at 14:03Sorry to keep posting!!!
So, I am slowly making progress. I have the following code. I am struggling a little with initiating a PC read. If I only have the endpoint callback code then the pc readpipe blocks forever. If I get the transfer started in the main function, then the endpoint callback starts to work and the readpipe function returns. But, the data is abcdefg... I thought the first 64 bytes of data should be 012345.... then abcdef after the first 64 bytes. the first buffer was filled by main with numbers! This is frustrating and confusing but I am slowly getting there!!!
uint8_t Transmit_Buffer[64] = ''abcdefghijklmnopqrstuvwxyz/0aabbccddeeffgghhiijjkkllmmnnooppqqrr'';
void EP1_IN_Callback(void)
{
if(GetENDPOINT(ENDP1) & EP_DTOG_RX) // Use EP_DTOG_RX flas as is actually SW_BUF flag. Refer ref manual page 589-590
{
UserToPMABufferCopy(Transmit_Buffer, ENDP1_TXADDR1, 64);
SetEPDblBuf1Count(ENDP1, EP_DBUF_IN, 64);
FreeUserBuffer(ENDP1, EP_DBUF_IN); // Toggle SW_BUF (ie toggle DTOG_RX for IN endpoint)
}
else
{
UserToPMABufferCopy(Transmit_Buffer, ENDP1_TXADDR0, 64);
SetEPDblBuf0Count(ENDP1, EP_DBUF_IN, 64);
FreeUserBuffer(ENDP1, EP_DBUF_IN);
}
SetEPTxValid(ENDP1);
}
int main(void)
{
int started = 0;
Set_System();
// Init USB
USB_Interrupts_Config();
Set_USBClock();
USB_Init();
for(int i = 0; i < 64; i++)
{
crap[i] = i;
}
while (1)
{
if(pInformation->Current_Configuration != 0 && !started)
{
uint16_t status = GetEPTxStatus(ENDP1);
if(status == EP_TX_NAK)
{
if(GetENDPOINT(ENDP1) & EP_DTOG_RX) // Use EP_DTOG_RX flas as is actually SW_BUF flag. Refer ref manual page 589-590
{
UserToPMABufferCopy(crap, ENDP1_TXADDR1, 64);
SetEPDblBuf1Count(ENDP1, EP_DBUF_IN, 64);
FreeUserBuffer(ENDP1, EP_DBUF_IN); // Toggle SW_BUF (ie toggle DTOG_RX for IN endpoint)
}
else
{
// UserToPMABufferCopy(crap, ENDP1_TXADDR0, 64);
// SetEPDblBuf0Count(ENDP1, EP_DBUF_IN, 64);
// FreeUserBuffer(ENDP1, EP_DBUF_IN);
}
SetEPTxValid(ENDP1);
started = 1;
}
}
else
{
int fuck = 5;
}
}
Cheers, STOne-
