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Code: Select all

QueueHandle_t red_line_queue;



void IRAM_ATTR isr_function( void *arg) 
{
   const int64_t time = esp_timer_get_time(); // store the "data" we want to enqueue into a local variable
   BaseType_t shouldYield = pdFALSE; // declare and initialize another local variable for the pxHigherPriorityTaskWoken argument
   
   xQueueSendFromISR(
       red_line_queue,
       &time, // pass a *pointer* to our data (local variable) to the function; the data pointed-to will be *copied* into the queue
       &shouldYield); // pass a *pointer* to the shouldYield local variable (= shouldYield is used as an output parameter)

   // If some task was waiting on our queue and should now be switched to,
   // xQueueSendFromISR will have set our shouldYield variable to pdTRUE       
   if(shouldYield != pdFALSE) {
       // let FreeRTOS know that we want it to switch tasks now
       portYIELD_FROM_ISR();
   }
}



int queue_time_1; //also tried long instead of int



void app_main()
{
 while (1)
    {
        printf("\n");
        if(xQueueReceive(red_line_queue, &(queue_time_1), (TickType_t)0))
        {
        printf("Data received from queue");
        }
        printf(queue_time_1);
        
        
      
    }
}

Code: Select all

QueueHandle_t red_line_queue;

Code: Select all

void app_main()
{
    ...
    red_line_queue = xQueueCreate(...);  // Size of queue items and number of items is set on creation
    ...
}

Code: Select all

red_line_queue = xQueueCreate (10, sizeof(unsigned int));