Allow Serial with flow control

arduino · Oct 7, 2019 · 87a622f · 87a622f
1 parent a89067f
commit 87a622f
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Showing 2 changed files with 26 additions and 5 deletions.
diff --git a/cores/arduino/Serial.cpp b/cores/arduino/Serial.cpp
@@ -37,6 +37,9 @@ void UART::begin(unsigned long baudrate) {
 	if (_serial == NULL) {
 		_serial = new mbed::RawSerial(tx, rx, baudrate);
 	}
+	if (rts != NC) {
+		_serial->set_flow_control(mbed::SerialBase::Flow::RTSCTS, rts, cts);
+	}
 	_serial->attach(mbed::callback(this, &UART::on_rx), mbed::SerialBase::RxIrq);
 }
 
@@ -84,11 +87,29 @@ UART::operator bool() {
 }
 
 #if SERIAL_HOWMANY > 0
-UART UART1(SERIAL1_TX, SERIAL1_RX);
+
+#ifdef SERIAL1_RTS
+UART UART1(SERIAL1_TX, SERIAL1_RX, SERIAL1_RTS, SERIAL1_CTS);
+#else
+UART UART1(SERIAL1_TX, SERIAL1_RX, NC, NC);
+#endif
+
 #if SERIAL_HOWMANY > 1
-UART UART2(SERIAL2_TX, SERIAL2_RX);
+
+#ifdef SERIAL2_RTS
+UART UART2(SERIAL2_TX, SERIAL2_RX, SERIAL2_RTS, SERIAL2_CTS);
+#else
+UART UART2(SERIAL2_TX, SERIAL2_RX, NC, NC);
+#endif
+
 #if SERIAL_HOWMANY > 2
-UART UART3(SERIAL3_TX, SERIAL3_RX);
+
+#ifdef SERIAL3_RTS
+UART UART1(SERIAL3_TX, SERIAL3_RX, SERIAL3_RTS, SERIAL3_CTS);
+#else
+UART UART1(SERIAL3_TX, SERIAL3_RX, NC, NC);
+#endif
+
 #endif
 #endif
 #endif
diff --git a/cores/arduino/Serial.h b/cores/arduino/Serial.h
@@ -32,7 +32,7 @@ namespace arduino {
 
 class UART : public HardwareSerial {
 	public:
-		UART(int _tx, int _rx) : tx((PinName)_tx), rx((PinName)_rx) {};
+		UART(int _tx, int _rx, int _rts, int _cts) : tx((PinName)_tx), rx((PinName)_rx), rts((PinName)_rts), cts((PinName)_cts) {};
 		void begin(unsigned long);
 		void begin(unsigned long baudrate, uint16_t config);
 		void end();
@@ -48,7 +48,7 @@ class UART : public HardwareSerial {
 	private:
 		void on_rx();
 		mbed::RawSerial* _serial = NULL;
-		PinName tx, rx;
+		PinName tx, rx, rts, cts;
 		RingBufferN<256> rx_buffer;
 		uint8_t intermediate_buf[4];
 };