diff options
| -rw-r--r-- | src/portable/wch/dcd_ch32_usbfs.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/src/portable/wch/dcd_ch32_usbfs.c b/src/portable/wch/dcd_ch32_usbfs.c index 09aa53490..ec521224e 100644 --- a/src/portable/wch/dcd_ch32_usbfs.c +++ b/src/portable/wch/dcd_ch32_usbfs.c @@ -506,7 +506,17 @@ bool dcd_edpt_iso_alloc(uint8_t rhport, uint8_t ep_addr, uint16_t largest_packet bool dcd_edpt_iso_activate(uint8_t rhport, const tusb_desc_endpoint_t *desc_ep) { (void)rhport; - (void)desc_ep; + const uint8_t ep = tu_edpt_number(desc_ep->bEndpointAddress); + const uint8_t dir = tu_edpt_dir(desc_ep->bEndpointAddress); + + // a transfer armed before SET_INTERFACE survives to here (no dcd close on this port): drop the + // stale descriptor and NAK the endpoint so the ISR can't complete it against the old buffer + data.xfer[ep][dir].valid = false; + if (dir == TUSB_DIR_IN) { + ep_tx_set_response(ep, USBFS_EP_T_RES_NAK); + } else { + ep_rx_set_response(ep, USBFS_EP_R_RES_NAK); + } return true; } |