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[UART] Saves the achieved uart baud rate and adds SerialUART::getAcheivedBaud() #3225

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Merged
merged 5 commits into from
Oct 28, 2025
Merged

[UART] Saves the achieved uart baud rate and adds SerialUART::getAcheivedBaud() #3225

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7cf7787
Return acheived baud rate from begin function
ngist Oct 27, 2025
6f7e619
avoid altering virtual function spec
ngist Oct 27, 2025
e706d38
removed dangling return
ngist Oct 27, 2025
3740aa4
updated per comments
ngist Oct 27, 2025
8f01ccd
Merge branch 'master' into capture_acheived_baud
earlephilhower Oct 27, 2025
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2 changes: 1 addition & 1 deletion cores/rp2040/SerialUART.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -239,7 +239,7 @@ void SerialUART::begin(unsigned long baud, uint16_t config) {
gpio_set_inover(_cts, _invertControl ? 1 : 0);
}

uart_init(_uart, baud);
_achievedBaud = uart_init(_uart, baud);
int bits, stop;
uart_parity_t parity;
switch (config & SERIAL_PARITY_MASK) {
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6 changes: 6 additions & 0 deletions cores/rp2040/SerialUART.h
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Original file line number Diff line number Diff line change
Expand Up @@ -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;
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