stmhal: Fix bug with USB CDC transmit buffer wrap around.
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@ -363,7 +363,7 @@ void USBD_CDC_SetInterrupt(int chr, void *data) {
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void USBD_CDC_Tx(const char *str, uint32_t len) {
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for (int i = 0; i < len; i++) {
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uint timeout = 200;
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while (UserTxBufPtrIn + 1 == UserTxBufPtrOut) {
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while (((UserTxBufPtrIn + 1) & (APP_TX_DATA_SIZE - 1)) == UserTxBufPtrOut) {
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if (timeout-- == 0) {
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break;
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}
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