Name: Fix uart TX flushing (#2029) · espressif/arduino-esp32@44ca2ee · GitHub
Rating: 4.7 (8612 reviews)
espressif
diff --git a/‎cores/esp32/esp32-hal-uart.c
+1-1 b/‎cores/esp32/esp32-hal-uart.c
+1-1
@@ -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.
Original file line number	Diff line number	Diff line change
`@@ -333,7 +333,7 @@ void uartFlush(uart_t* uart)`
`333`	`333`	`}`
`334`	`334`
`335`	`335`	`UART_MUTEX_LOCK();`
`336`		`-while(uart->dev->status.txfifo_cnt);`
	`336`	`+while(uart->dev->status.txfifo_cnt\|\|uart->dev->status.st_utx_out);`
`337`	`337`
`338`	`338`	`//Due to hardware issue, we can not use fifo_rst to reset uart fifo.`
`339`	`339`	`//See description about UART_TXFIFO_RST and UART_RXFIFO_RST in <<esp32_technical_reference_manual>> v2.6 or later.`