RTOS/CC3200: System stucks on "Task_allBlockedFunction()"

Part Number: CC3200

Tool/software: TI-RTOS

Hi there,

I'm facing with a problem regarding TI-RTOS in particular with "osi_Sleep" function.

This is my situation:

• MCU: CC3200
• TI-RTOS
• AWS IoT SDK (C)

I use AWS IoT SDK to send and receive data from AWS backend and I implemented an interface layer to permit to IoT SDK the use of SOCKET and TIMER.

Regarding the timer, I built a Timer Software library that uses one hardware timer and create several independent down counter. When a counter reach “0” a callback function is invoked. Every time AWS IoT SDK need to know the time elapsed it uses the time module. Into the initialization of the software timer I put a call to ois_Sleep with 1 millisecond of delay.

Everything work until I do this:

Scenario: polling periodically the AWS backend to receive data.

I create a loop that ping the AWS backend and suspend the task for 1 second (osi_Sleep(1000)).

The loop is skipped when:

• A time out occurs. I initialize another software timer when elapses break the loop.
• A new message is received.  This event breaks the loop.

If the timeout elapses, I invoke a function to close the connection towards the AWS backend and now the system Stuck in this function Task_allBlockedFunction().

/*
 *  ======== Task_enter ========
 *  Here on task's first invocation.
 *
 *  Unlock the Task Scheduler to enter task as though we
 *  returned through Task_restore()
 */
Void Task_enter()
{
    if (Task_module->workFlag) {
        Task_schedule();
    }
    Task_module->locked = FALSE;
    Hwi_enable();
}




Void Task_allBlockedFunction()
{
    volatile UInt delay;

    if (Task_allBlockedFunc == Idle_run) {
        Hwi_enable();
        Idle_run();
        Hwi_disable();
    }
    else if (Task_allBlockedFunc == NULL) {
        Hwi_enable();
        /* Guarantee that interrupts are enabled briefly */
        for (delay = 0; delay < 1; delay++) {
           ;
        }
        Hwi_disable();
    }
    else {
        Task_allBlockedFunc();
        /*
         * disable ints just in case the
         * allBlockedFunc left them enabled
         */
        Hwi_disable();
    }
}

I think that the stuck is related to osi_Sleep function.

This is a recap of operations that system performs:

1. Loop function with osi_Sleep(1000)
2. Starts software timer with callback.
3. Timeout Callback closes the connection.
4. AWS SDK closes connection using a timer.
5. Timer initialization uses osi_Sleep(1).
6. System STUCKS.

May the nested osi_Sleep can create problems?

I notice that if I invoke the AWS SDK function (that uses the timer) not in a callback everything works.

I can’t figure out to this problem.

Any suggestion?

Thanks!