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

TaskHandle_t task1_handle;
SemaphoreHandle_t mutex;



void setup() {
  Serial.begin(9600);
  xTaskCreate(task1, "print task", 128,  NULL, 1,  &task1_handle);
  xTaskCreate(task2, "print task", 128,  NULL, 2,  NULL);

  mutex = xSemaphoreCreateMutex();
  
}

void loop()
{
  // Empty. Things are done in Tasks.
}

void task1(void *pvParameters)  
{
  while(1){
    Serial.print("priority of task 1 = ");
    Serial.println(uxTaskPriorityGet(task1_handle ));
    if (xSemaphoreTake(mutex, 10) == pdTRUE){
      Serial.println("mutex taken by task 1, sleep for 3 seconds");
      vTaskDelay( 3000 / portTICK_PERIOD_MS ); 
    }

    Serial.print("priority of task 1 = ");
    Serial.println(uxTaskPriorityGet(task1_handle ));

    Serial.println("delete task 1");

    vTaskDelete(NULL);


     }
}

void task2(void *pvParameters)  
{
  while(1){
    Serial.println("block task 2 for 3 second allow task 1 to run");
    vTaskDelay( 3000 / portTICK_PERIOD_MS ); 
    Serial.println("task 2 try to take mutex");
    xSemaphoreTake(mutex, portMAX_DELAY);
     }
}