LED Blink

Let's blink an LED on the STM32 board.

Code

Here is the full code to blink an LED on the STM32 board:

main.cpp
#include <Arduino.h>
#include <WSerial.h>

#define LED_PIN PC13

void setup() {
  Serial.begin(115200);

  pinMode(LED_PIN, OUTPUT);
  delay(5000);
  Serial.println("Start!");
}

void loop() {
  Serial.println("Turn on!");
  digitalWrite(LED_PIN, HIGH);
  delay(1000);
  Serial.println("Turn off!");
  digitalWrite(LED_PIN, LOW);
  delay(1000);
}

For the Blackpill STM32 board, the LED pin is PC13. You should change the pin according to your board.

platformio.ini
[env:genericSTM32F411CE]
platform = ststm32
board = genericSTM32F411CE
lib_archive = false
framework = arduino
upload_protocol = stlink
monitor_speed = 115200
build_flags =
  -D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC
  -D PIO_FRAMEWORK_ARDUINO_SERIAL_WITHOUT_GENERIC

If you add the above build_flags to the platformio.ini file, you can read the serial monitor output with USB.

Code​

Code