diff options
| -rw-r--r-- | stmhal/usbd_cdc_interface.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/stmhal/usbd_cdc_interface.c b/stmhal/usbd_cdc_interface.c index a62f8a801f..c441e9c61c 100644 --- a/stmhal/usbd_cdc_interface.c +++ b/stmhal/usbd_cdc_interface.c @@ -363,7 +363,7 @@ void USBD_CDC_SetInterrupt(int chr, void *data) { void USBD_CDC_Tx(const char *str, uint32_t len) { for (int i = 0; i < len; i++) { uint timeout = 200; - while (UserTxBufPtrIn + 1 == UserTxBufPtrOut) { + while (((UserTxBufPtrIn + 1) & (APP_TX_DATA_SIZE - 1)) == UserTxBufPtrOut) { if (timeout-- == 0) { break; } |