Workaround spurious ISO Tx interrupt.

hathach · Apr 5, 2024 · a4848b5 · a4848b5
1 parent cf9257f
commit a4848b5
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c b/src/portable/st/stm32_fsdev/dcd_stm32_fsdev.c
@@ -155,6 +155,7 @@ typedef struct
   uint16_t max_packet_size;
   uint16_t pma_alloc_size;
   uint8_t ep_idx; // index for USB_EPnR register
+  bool in_complete; // Workaround for ISO IN EP doesn't have interrupt mask
 } xfer_ctl_t;
 
 // EP allocator
@@ -519,6 +520,10 @@ static void dcd_ep_ctr_tx_handler(uint32_t wIstr)
 
   xfer_ctl_t * xfer = xfer_ctl_ptr(ep_addr);
 
+  /* Ignore spurious int */
+  if(xfer->in_complete) return;
+  xfer->in_complete = true;
+
   if ((wEPRegVal & USB_EP_TYPE_MASK) == USB_EP_ISOCHRONOUS) {
     pcd_set_ep_tx_cnt(USB, EPindex, 0);
   }
@@ -1039,8 +1044,11 @@ static void dcd_transmit_packet(xfer_ctl_t * xfer, uint16_t ep_ix)
   }
   xfer->queued_len = (uint16_t)(xfer->queued_len + len);
 
+  dcd_int_disable(0);
   pcd_set_ep_tx_cnt(USB, ep_ix, len);
   pcd_set_ep_tx_status(USB, ep_ix, USB_EP_TX_VALID);
+  xfer->in_complete = false;
+  dcd_int_enable(0);
 
 }