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esp8266/uart: Add uart_flush() function.

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This commit is contained in:
Paul Sokolovsky
2016-01-03 07:33:42 +02:00
parent d3a4d39687
commit d9d4a72679
2 changed files with 10 additions and 0 deletions
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9
esp8266/uart.c
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@@ -105,6 +105,15 @@ void uart_tx_one_char(uint8 uart, uint8 TxChar) {
WRITE_PERI_REG(UART_FIFO(uart), TxChar);
}
void uart_flush(uint8 uart) {
while (true) {
uint32 fifo_cnt = READ_PERI_REG(UART_STATUS(uart)) & (UART_TXFIFO_CNT<<UART_TXFIFO_CNT_S);
if ((fifo_cnt >> UART_TXFIFO_CNT_S & UART_TXFIFO_CNT) == 0) {
break;
}
}
}
/******************************************************************************
* FunctionName : uart1_write_char
* Description : Internal used function