diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/portable/st/synopsys/dcd_synopsys.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/portable/st/synopsys/dcd_synopsys.c b/src/portable/st/synopsys/dcd_synopsys.c index 66ef44cf3..9c1672220 100644 --- a/src/portable/st/synopsys/dcd_synopsys.c +++ b/src/portable/st/synopsys/dcd_synopsys.c @@ -372,7 +372,10 @@ bool dcd_edpt_xfer (uint8_t rhport, uint8_t ep_addr, uint8_t * buffer, uint16_t in_ep[epnum].DIEPTSIZ = (num_packets << USB_OTG_DIEPTSIZ_PKTCNT_Pos) | \ ((total_bytes & USB_OTG_DIEPTSIZ_XFRSIZ_Msk) << USB_OTG_DIEPTSIZ_XFRSIZ_Pos); in_ep[epnum].DIEPCTL |= USB_OTG_DIEPCTL_EPENA | USB_OTG_DIEPCTL_CNAK; - dev->DIEPEMPMSK |= (1 << epnum); + // Enable fifo empty interrupt only if there are something to put in the fifo. + if(total_bytes != 0) { + dev->DIEPEMPMSK |= (1 << epnum); + } } else { // Each complete packet for OUT xfers triggers XFRC. out_ep[epnum].DOEPTSIZ |= (1 << USB_OTG_DOEPTSIZ_PKTCNT_Pos) | \ |