Queues

Queue page shows an overview of message queues in the kernel.Following figure shows the screen shot of queues screen. In order to see queues, user has to set configQUEUE_REGISTRY_SIZE in FreeRTOS.h and add the queues to the queue registry by calling vQueueAddToRegistry.

The description of parameters shown in GUI is given below.

1. 1.

   Queue Name : Friendly name that identifies the queue

2. 2.

   Head : Location where the queue starts

3. 3.

   Tail : Location where the queue Ends

4. 4.

   Write To : Next free place in queue

5. 5.

   Read From : Location where last item was read from

6. 6.

   Number of Elements : Number of elements in the queue

7. 7.

   Missed Ticks : Number of ticks occurred while scheduler was suspended

8. 8.

   Length : Capacity of the queue in terms of number of elements

9. 9.

   Element Size : Size of an element in the queue

10. 10.

    Tasks Waiting To Send : asks which are waiting to send to this queue

11. 11.

    Tasks Waiting To Read: Tasks which are waiting to read from this queue

12. 12.

    Elements Removed : Number of elements removed from the queue while queue was locked

13. 13.

    Elements Added : Number of elements added to the queue while queue was locked