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| author | Paul Sokolovsky <pfalcon@users.sourceforge.net> | 2016-01-03 07:33:42 +0200 |
|---|---|---|
| committer | Paul Sokolovsky <pfalcon@users.sourceforge.net> | 2016-03-05 22:13:26 +0200 |
| commit | d9d4a72679eec681e213d4a81017abc0000e6220 (patch) | |
| tree | 232228bdb44c71006109a2f27f4bcb4b1c1db35c /esp8266 | |
| parent | d3a4d39687f941d12d727b80c79dd98ebae03674 (diff) | |
| download | micropython-d9d4a72679eec681e213d4a81017abc0000e6220.tar.gz micropython-d9d4a72679eec681e213d4a81017abc0000e6220.zip | |
esp8266/uart: Add uart_flush() function.
Diffstat (limited to 'esp8266')
| -rw-r--r-- | esp8266/uart.c | 9 | ||||
| -rw-r--r-- | esp8266/uart.h | 1 |
2 files changed, 10 insertions, 0 deletions
diff --git a/esp8266/uart.c b/esp8266/uart.c index aa3d368b7c..942c397e90 100644 --- a/esp8266/uart.c +++ b/esp8266/uart.c @@ -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 diff --git a/esp8266/uart.h b/esp8266/uart.h index ce1438baf3..ed0dcfb445 100644 --- a/esp8266/uart.h +++ b/esp8266/uart.h @@ -92,5 +92,6 @@ typedef struct { void uart_init(UartBautRate uart0_br, UartBautRate uart1_br); int uart0_rx(void); void uart_tx_one_char(uint8 uart, uint8 TxChar); +void uart_flush(uint8 uart); #endif // _INCLUDED_UART_H_ |