avoid altering virtual function spec

Author: ngist

cores/rp2040/SerialUART.cpp

@@ -239,7 +239,7 @@ void SerialUART::begin(unsigned long baud, uint16_t config) {
         gpio_set_inover(_cts, _invertControl ? 1 : 0);
     }
 
-    int achieved_baud = uart_init(_uart, baud);
+    _achievedBaud = uart_init(_uart, baud);
     int bits, stop;
     uart_parity_t parity;
     switch (config & SERIAL_PARITY_MASK) {
@@ -295,7 +295,6 @@ void SerialUART::begin(unsigned long baud, uint16_t config) {
     }
     _break = false;
     _running = true;
-    return achieved_baud;
 }
 
 void SerialUART::end() {

cores/rp2040/SerialUART.h

@@ -64,10 +64,10 @@ class SerialUART : public arduino::HardwareSerial {
     bool setFIFOSize(size_t size);
     bool setPollingMode(bool mode = true);
 
-    int begin(unsigned long baud = 115200) override {
+    void begin(unsigned long baud = 115200) override {
         return begin(baud, SERIAL_8N1);
     };
-    int begin(unsigned long baud, uint16_t config) override;
+    void begin(unsigned long baud, uint16_t config) override;
     void end() override;
 
     virtual int peek() override;
@@ -93,13 +93,19 @@ class SerialUART : public arduino::HardwareSerial {
     // on read)
     bool getBreakReceived();
 
+    // Returns the baud rate the uart is actually operating at vs the desired baud rate specified to begin()
+    int getAcheivedBaud() {
+        return _achievedBaud;
+    }
+
 private:
     bool _running = false;
     uart_inst_t *_uart;
     pin_size_t _tx, _rx;
     pin_size_t _rts, _cts;
     gpio_function_t _fcnTx, _fcnRx, _fcnRts, _fcnCts;
     int _baud;
+    int _achievedBaud;
     mutex_t _mutex;
     bool _polling = false;
     bool _overflow;