specchioriflesso/USB_Host_Shield_2.0
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Recover from OUT-NAK

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Yuuichi Akagawa 2021-03-26 14:43:31 +09:00
parent a321ad36ab
commit 82df4b990e
1 changed files with 5 additions and 0 deletions
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5
Usb.cpp
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@ -388,6 +388,11 @@ uint8_t USB::OutTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t nbytes, uint8
data_p += bytes_tosend;
}//while( bytes_left...
breakout:
/* If rcode(=rHRSL) is non-zero, untransmitted data remains in the SNDFIFO. */
if(rcode != 0) {
//Switch the FIFO containing the OUT data back under microcontroller control and reset pointer.
regWr(rSNDBC, 0);
}
pep->bmSndToggle = (regRd(rHRSL) & bmSNDTOGRD) ? 1 : 0; //bmSNDTOG1 : bmSNDTOG0; //update toggle
return ( rcode); //should be 0 in all cases