hi, I m bit confused while implementing queue and semaphore. my scenario is as follows. I have three task. Two are from same prioirity and one is having higher prioirity. I want to send data from three task to queue. i will receive the data from queue to fourth task, where i will send data to LCD. I can’t understand how to manage the queue. xQueueHandle lcd_queue=0; lcdqueue = xQueueCreate(20,sizeof(uint8t)); xcreate(task1,”T1″,NULL,1,NULL); xcreate(task2,”T2″,NULL,1,NULL); xcreate(task3,”T3″,NULL,2,NULL); xcreate(Send_lcd,”LCD”,NULL,1,NULL); // This task will send data to LCD and receive the data from queue.
Use xQueueSendToBack() to send to the queue and xQueueReceive() to receive from the queue. No need for a semaphore. http://www.freertos.org/xQueueSendToBack.html http://www.freertos.org/a00118.html
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