Tag: USART

Here’s the “Hello World” edition of getting access to USART2 and USART3 on an STM32 Blue Pill in PlatformIO using the Arduino framework.

/* lib_deps = NONE
  # Using a library name

-------- Platform.ini Settings----------
[env:bluepill_f103c8]
platform = ststm32
board = bluepill_f103c8
#board = bluepill_f103c8
framework = arduino
upload_protocol = stlink
lib_compat_mode = soft

*/

#include "Arduino.h"
HardwareSerial Serial2(USART2);   // PA3  (RX)  PA2  (TX)
HardwareSerial Serial3(USART3); // PB11 (RX)  PB10   (TX)

void setup() {
Serial.begin(19200);   // PA10  (RX) PA9 (TX) 
Serial2.begin(19200);  // PA3  (RX)  PA2  (TX)
Serial3.begin(19200);  // PB11 (RX)  PB10   (TX)

Serial.println("Serial: 1");
Serial2.println("Serial2: 2");
Serial3.println("Serial3: 3");
}

void loop() {
Serial.println("Serial: 1");
Serial2.println("Serial2: 2");
Serial3.println("Serial3: 3");
delay(1000);
}