/**
 * Simulación de placa STM32-BluePill Digital I/O Board
 * https://github.com/Open-Hardware-Latinoamerica/stm32-bluepill-iomod
 */

static int RGB[]{PB9, PB8, PB7};

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, STM32!");
  for(auto &p : RGB) {
    pinMode(p, OUTPUT);
    digitalWrite(p, HIGH);
  }  
}

int i{};
void loop() {
  digitalWrite(RGB[i], !digitalRead(RGB[i]));
  i++;
  i %= 3;
  delay(500); // this speeds up the simulation
}