From 2f8beb8d88ff98025b87e4a1aac350096d5ed6ac Mon Sep 17 00:00:00 2001 From: Damien George Date: Mon, 24 Mar 2014 12:23:03 +0000 Subject: [PATCH] stmhal: Fix bug with USB CDC transmit buffer wrap around. --- stmhal/usbd_cdc_interface.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) 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; }