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#include <Arduino.h>

/* SoftwareTimer is a helper class that uses FreeRTOS software timer
 * to invoke callback. Its periodic timing is flexible as opposed to
 * hardware timer and cannot be faster than rtos's tick which is configured
 * at  ~1 ms interval.
 *
 * If you need an strict interval timing, or faster frequency, check out
 * the hw_systick sketch example that use hardware systick timer.
 *
 * http://www.freertos.org/RTOS-software-timer.html
 */
SoftwareTimer blinkTimer;


void setup()
{
  // Configure the timer with 1000 ms interval, with our callback
  blinkTimer.begin(1000, blink_timer_callback);

  // Start the timer
  blinkTimer.start();
}

void loop()
{
  // do nothing here
}


/**
 * Software Timer callback is invoked via a built-in FreeRTOS thread with
 * minimal stack size. Therefore it should be as simple as possible. If
 * a periodically heavy task is needed, please use Scheduler.startLoop() to
 * create a dedicated task for it.
 *
 * More information http://www.freertos.org/RTOS-software-timer.html
 */
void blink_timer_callback(TimerHandle_t xTimerID)
{
  // freeRTOS timer ID, ignored if not used
  (void) xTimerID;

  digitalToggle(LED_RED);
}