a8622c4f91
* removes pin detaching from end(false) * adds UART0 baud rate detection example * fixes baud rate messages
37 lines
1.4 KiB
C++
37 lines
1.4 KiB
C++
/*
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This Sketch demonstrates how to detect and set the baud rate when the UART0 is connected to
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some port that is sending data. It can be used with the Arduino IDE Serial Monitor to send the data.
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Serial.begin(0) will start the baud rate detection. Valid range is 300 to 230400 baud.
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It will try to detect for 20 seconds, by default, while reading RX.
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This timeout of 20 seconds can be changed in the begin() function through <<timeout_ms>> parameter:
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void HardwareSerial::begin(baud, config, rxPin, txPin, invert, <<timeout_ms>>, rxfifo_full_thrhd)
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It is necessary that the other end sends some data within <<timeout_ms>>, otherwise the detection won't work.
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IMPORTANT NOTE: baud rate detection seem to only work with ESP32 and ESP32-S2.
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In other other SoCs, it doesn't work.
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*/
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// Open the Serial Monitor with testing baud start typing and sending caracters
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void setup() {
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Serial.begin(0); // it will try to detect the baud rate for 20 seconds
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Serial.print("\n==>The baud rate is ");
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Serial.println(Serial.baudRate());
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//after 20 seconds timeout, when not detected, it will return zero - in this case, we set it back to 115200.
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if (Serial.baudRate() == 0) {
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// Trying to set Serial to a safe state at 115200
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Serial.end();
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Serial.begin(115200);
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Serial.setDebugOutput(true);
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delay(1000);
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log_e("Baud rate detection failed.");
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}
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}
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void loop() {
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}
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