byte ledPin = 21;
byte interruptPin = 22;
volatile byte state = LOW;
SemaphoreHandle_t xCountingSemaphore;

void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  pinMode(interruptPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPin), ISRcallback, RISING);

  xCountingSemaphore = xSemaphoreCreateCounting( 9, 0 );
 
  xTaskCreate(
    ISRprocessing,           /* Task function. */
    "ISRprocessing",        /* name of task. */
    1000,                    /* Stack size of task */
    NULL,                     /* parameter of the task */
    4,                        /* priority of the task */
    NULL);  
}

void loop() {
}

void ISRcallback() {

  BaseType_t xHigherPriorityTaskWoken = pdFALSE;
  xSemaphoreGiveFromISR( xCountingSemaphore, &xHigherPriorityTaskWoken );
  xSemaphoreGiveFromISR( xCountingSemaphore, &xHigherPriorityTaskWoken );
  xSemaphoreGiveFromISR( xCountingSemaphore, &xHigherPriorityTaskWoken );
  xSemaphoreGiveFromISR( xCountingSemaphore, &xHigherPriorityTaskWoken );
  xSemaphoreGiveFromISR( xCountingSemaphore, &xHigherPriorityTaskWoken );
  xSemaphoreGiveFromISR( xCountingSemaphore, &xHigherPriorityTaskWoken );
}

void ISRprocessing( void * parameter )
{
  Serial.println((char *)parameter);
 
  for(;;){
   
    xSemaphoreTake( xCountingSemaphore, portMAX_DELAY );
    Serial.println("ISRprocessing is running");
  
    state = !state;
    digitalWrite(ledPin, state);
   
    delay(1000);
  }
  vTaskDelete( NULL );
}