diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/portable/mentor/musb/dcd_musb.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/src/portable/mentor/musb/dcd_musb.c b/src/portable/mentor/musb/dcd_musb.c index 08d7dd700..fdd2eaac9 100644 --- a/src/portable/mentor/musb/dcd_musb.c +++ b/src/portable/mentor/musb/dcd_musb.c @@ -128,6 +128,9 @@ static void pipe0_start_setup(uint8_t rhport, musb_ep_csr_t* ep_csr, _dcd.pipe0.state = PIPE0_STATE_DATA_IN; ep_csr->csr0l = MUSB_CSRL0_RXRDYC; } else { + // If OUT (rx) direction, let edpt0_xfer() clear RXRDY when it's ready to receive data. + // Deliberate deviation from the databook's canonical flow (ack right after unload), + // used as NAK flow control until usbd arms the drain buffer. _dcd.pipe0.state = PIPE0_STATE_DATA_OUT; } } |