#include <Arduino.h>
#include <STM32FreeRTOS.h>

#define LED PC13

void task(void *pvParameters)
{
  Serial.println("task start");
  for (;;)
  {

    digitalWrite(LED, HIGH);
    vTaskDelay(100);
    digitalWrite(LED, LOW);
    vTaskDelay(100);
  }
}

void setup()
{
  Serial.begin(115200);
  Serial.println("Serial start");
  pinMode(LED, OUTPUT);
  xTaskCreate(task, "task", 128, NULL, 2, NULL);
  vTaskStartScheduler();
}

void loop()
{
  for (int i = 65; i < 91; i++)
  {
    Serial.println((char)i);
    delay(1000);
  }
}