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Bugfix/detect baudrate (#3188)

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* Expose uartStartDetectBaudrate(uart_t *) in esp32-hal-uart.h and call it from HardwareSerial::begin() if baudrate detection is requested (by passing a baudrate of 0) to solve baudrate detection problems

* Avoid a division by zero error in uartGetBaudRate()
This commit is contained in:
Jeroen88
2019-09-08 23:59:32 +02:00
committed by Me No Dev
parent 5f77b0108b
commit f71a4bd406
3 changed files with 15 additions and 0 deletions
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cores/esp32/HardwareSerial.cpp
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@ -55,6 +55,7 @@ void HardwareSerial::begin(unsigned long baud, uint32_t config, int8_t rxPin, in
_uart = uartBegin(_uart_nr, baud ? baud : 9600, config, rxPin, txPin, 256, invert);
if(!baud) {
uartStartDetectBaudrate(_uart);
time_t startMillis = millis();
unsigned long detectedBaudRate = 0;
while(millis() - startMillis < timeout_ms && !(detectedBaudRate = uartDetectBaudrate(_uart))) {