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fix uart_flush() returning early #2029

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Nov 19, 2018
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fix uart_flush() returning early #2029

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2 changes: 1 addition & 1 deletion cores/esp32/esp32-hal-uart.c
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Original file line number Diff line number Diff line change
Expand Up @@ -333,7 +333,7 @@ void uartFlush(uart_t* uart)
}

UART_MUTEX_LOCK();
while(uart->dev->status.txfifo_cnt);
while(uart->dev->status.txfifo_cnt || uart->dev->status.st_utx_out);

//Due to hardware issue, we can not use fifo_rst to reset uart fifo.
//See description about UART_TXFIFO_RST and UART_RXFIFO_RST in <<esp32_technical_reference_manual>> v2.6 or later.
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