diff options
| -rw-r--r-- | ports/stm32/usbd_cdc_interface.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/ports/stm32/usbd_cdc_interface.c b/ports/stm32/usbd_cdc_interface.c index a8261a958..a465f608a 100644 --- a/ports/stm32/usbd_cdc_interface.c +++ b/ports/stm32/usbd_cdc_interface.c @@ -382,6 +382,10 @@ void usbd_cdc_tx_always(usbd_cdc_itf_t *cdc, const uint8_t *buf, uint32_t len) { uint32_t start = HAL_GetTick(); while (usbd_cdc_tx_buffer_full(cdc) && HAL_GetTick() - start <= 500) { usbd_cdc_try_tx(cdc); + if (cdc->base.usbd->pdev->dev_state == USBD_STATE_SUSPENDED) { + // The USB is suspended so buffer will never be drained; exit loop + break; + } if (query_irq() == IRQ_STATE_DISABLED) { // IRQs disabled so buffer will never be drained; exit loop break; |