/* rcode 0 if no errors. rcode 01-0f is relayed from dispatchPkt(). Rcode f0 means RCVDAVIRQ error,
fe USB xfer timeout */
byte USB::inTransfer( byte addr, byte ep, unsigned int nbytes, char* data, unsigned int nak_limit )
{
byte rcode;
byte pktsize;
byte maxpktsize = devtable[ addr ].epinfo[ ep ].MaxPktSize;
unsigned int xfrlen = 0;
regWr( rHCTL, devtable[ addr ].epinfo[ ep ].rcvToggle ); //set toggle value
while( 1 ) { // use a 'return' to exit this loop
rcode = dispatchPkt( tokIN, ep, nak_limit ); //IN packet to EP-'endpoint'. Function takes care of NAKS.
if( rcode ) {
return( rcode ); //should be 0, indicating ACK. Else return error code.
}
/* check for RCVDAVIRQ and generate error if not present */
/* the only case when absense of RCVDAVIRQ makes sense is when toggle error occured. Need to add handling for that */
if(( regRd( rHIRQ ) & bmRCVDAVIRQ ) == 0 ) {
return ( 0xf0 ); //receive error
}
pktsize = regRd( rRCVBC ); //number of received bytes
data = bytesRd( rRCVFIFO, pktsize, data );
regWr( rHIRQ, bmRCVDAVIRQ ); // Clear the IRQ & free the buffer
xfrlen += pktsize; // add this packet's byte count to total transfer length
/* The transfer is complete under two conditions: */
/* 1. The device sent a short packet (L.T. maxPacketSize) */
/* 2. 'nbytes' have been transferred. */
if (( pktsize < maxpktsize ) || (xfrlen >= nbytes )) { // have we transferred 'nbytes' bytes?
if( regRd( rHRSL ) & bmRCVTOGRD ) { //save toggle value
devtable[ addr ].epinfo[ ep ].rcvToggle = bmRCVTOG1;
}
else {
devtable[ addr ].epinfo[ ep ].rcvToggle = bmRCVTOG0;
}
return( 0 );
}
}//while( 1 )
}
uint8_t UsbHost_::InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, uint8_t* data)
{
uint8_t rcode = 0;
uint8_t pktsize;
uint16_t nbytes = *nbytesptr;
uint8_t maxpktsize = pep->maxPktSize;
*nbytesptr = 0;
regWr( rHCTL, (pep->bmRcvToggle) ? bmRCVTOG1 : bmRCVTOG0 ); //set toggle value
while( 1 ) // use a 'return' to exit this loop
{
rcode = dispatchPkt( tokIN, pep->epAddr, nak_limit ); //IN packet to EP-'endpoint'. Function takes care of NAKS.
if( rcode ) {
#if 0
if ((rcode != 0x04) && (rcode != 0x0d)) {
USBTRACE2("\ndispatchPkt error: ", rcode);
}
#endif
return( rcode ); //should be 0, indicating ACK. Else return error code.
}
/* check for RCVDAVIRQ and generate error if not present */
/* the only case when absense of RCVDAVIRQ makes sense is when toggle error occured. Need to add handling for that */
if(( regRd( rHIRQ ) & bmRCVDAVIRQ ) == 0 )
return ( 0xf0 ); //receive error
pktsize = regRd( rRCVBC ); //number of received bytes
assert(pktsize <= nbytes);
int16_t mem_left = (int16_t)nbytes - *((int16_t*)nbytesptr);
if (mem_left < 0)
mem_left = 0;
data = bytesRd( rRCVFIFO, ((pktsize > mem_left) ? mem_left : pktsize), data );
regWr( rHIRQ, bmRCVDAVIRQ ); // Clear the IRQ & free the buffer
*nbytesptr += pktsize; // add this packet's byte count to total transfer length
/* The transfer is complete under two conditions: */
/* 1. The device sent a short packet (L.T. maxPacketSize) */
/* 2. 'nbytes' have been transferred. */
if (( pktsize < maxpktsize ) || (*nbytesptr >= nbytes )) // have we transferred 'nbytes' bytes?
{
// Save toggle value
pep->bmRcvToggle = (( regRd( rHRSL ) & bmRCVTOGRD )) ? 1 : 0;
return( 0 );
} // if
} //while( 1 )
}
uint8_t USB::InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, uint8_t* data) {
uint8_t rcode = 0;
uint8_t pktsize;
uint16_t nbytes = *nbytesptr;
//printf("Requesting %i bytes ", nbytes);
uint8_t maxpktsize = pep->maxPktSize;
*nbytesptr = 0;
regWr(rHCTL, (pep->bmRcvToggle) ? bmRCVTOG1 : bmRCVTOG0); //set toggle value
// use a 'break' to exit this loop
while(1) {
rcode = dispatchPkt(tokIN, pep->epAddr, nak_limit); //IN packet to EP-'endpoint'. Function takes care of NAKS.
if(rcode == hrTOGERR) {
// yes, we flip it wrong here so that next time it is actually correct!
pep->bmRcvToggle = (regRd(rHRSL) & bmSNDTOGRD) ? 0 : 1;
regWr(rHCTL, (pep->bmRcvToggle) ? bmRCVTOG1 : bmRCVTOG0); //set toggle value
continue;
}
if(rcode) {
//printf(">>>>>>>> Problem! dispatchPkt %2.2x\r\n", rcode);
break; //should be 0, indicating ACK. Else return error code.
}
/* check for RCVDAVIRQ and generate error if not present */
/* the only case when absence of RCVDAVIRQ makes sense is when toggle error occurred. Need to add handling for that */
if((regRd(rHIRQ) & bmRCVDAVIRQ) == 0) {
//printf(">>>>>>>> Problem! NO RCVDAVIRQ!\r\n");
rcode = 0xf0; //receive error
break;
}
pktsize = regRd(rRCVBC); //number of received bytes
//printf("Got %i bytes \r\n", pktsize);
// This would be OK, but...
//assert(pktsize <= nbytes);
if(pktsize > nbytes) {
// This can happen. Use of assert on Arduino locks up the Arduino.
// So I will trim the value, and hope for the best.
//printf(">>>>>>>> Problem! Wanted %i bytes but got %i.\r\n", nbytes, pktsize);
pktsize = nbytes;
}
int16_t mem_left = (int16_t)nbytes - *((int16_t*)nbytesptr);
if(mem_left < 0)
mem_left = 0;
data = bytesRd(rRCVFIFO, ((pktsize > mem_left) ? mem_left : pktsize), data);
regWr(rHIRQ, bmRCVDAVIRQ); // Clear the IRQ & free the buffer
*nbytesptr += pktsize; // add this packet's byte count to total transfer length
/* The transfer is complete under two conditions: */
/* 1. The device sent a short packet (L.T. maxPacketSize) */
/* 2. 'nbytes' have been transferred. */
if((pktsize < maxpktsize) || (*nbytesptr >= nbytes)) // have we transferred 'nbytes' bytes?
{
// Save toggle value
pep->bmRcvToggle = ((regRd(rHRSL) & bmRCVTOGRD)) ? 1 : 0;
//printf("\r\n");
rcode = 0;
break;
} // if
} //while( 1 )
return ( rcode);
}
