#include <Arduino_FreeRTOS.h>
#include <semphr.h>

long d_time = 150; 
volatile unsigned long last_micros;

SemaphoreHandle_t interruptSemaphore;

void setup() {
  pinMode(3, INPUT_PULLUP);  
  xTaskCreate(TaskLed, "Led", 128, NULL, 0, NULL );
  xTaskCreate(TaskBlink, "LedBlink", 128, NULL, 0, NULL );
  interruptSemaphore = xSemaphoreCreateBinary();
  if (interruptSemaphore != NULL) {
    attachInterrupt(digitalPinToInterrupt(3), Interrupt, LOW);
    
  }
}

void loop() {}  


void interruptHandler() {
    xSemaphoreGiveFromISR(interruptSemaphore, NULL);
}

void TaskLed(void *pvParameters)
{  
  pinMode(8, OUTPUT);
  for (;;) {
    if (xSemaphoreTake(interruptSemaphore, portMAX_DELAY) == pdPASS) {
      digitalWrite(8, !digitalRead(8));
    }
  }
}
void TaskBlink(void *pvParameters)
{  
    pinMode(21, OUTPUT);
    for (;;) {
      digitalWrite(21, HIGH);
      vTaskDelay(500 / portTICK_PERIOD_MS);
      digitalWrite(21, LOW);
      vTaskDelay(500 / portTICK_PERIOD_MS);
  }
}
void Interrupt() {
  
  if((long)(micros() - last_micros) >= d_time * 1000) {
    interruptHandler();
    last_micros = micros();
  }
  
}