CC2650: simple_peripheral_cc2650lp: how to do simple inter-task communication

Hi Rafael,

In main.c I defined a task to call the redLED function every 500ms, before the call to BIOS_Start() so I think that is why it's running continuously even while the BLE stack is running.

Here is the code that I used to set up the LED task:

  /* Construct LED Task thread */
  Task_Params_init(&ledTaskParams);
  ledTaskParams.stackSize = TASKSTACKSIZE;
  ledTaskParams.stack = &tsk0Stack;
  ledTaskParams.arg0 = 50000;  // task period = 0.5s
  Task_construct(&tsk0Struct, (Task_FuncPtr)redLED, &ledTaskParams, NULL);

And here is the redLED task function (outside of the main() function, but located within the main.c file:

/*
 *  ======== redLED ========
 *  Task periodically toggles the red LED as proof of life...
 */
Void redLED(UArg arg0, UArg arg1)
{
    PWM_Handle pwm1;
    PWM_Params params;
    uint16_t   pwmPeriod = 3000;      // Period and duty in microseconds
    uint16_t   ledState;

    PWM_Params_init(&params);
    params.dutyUnits = PWM_DUTY_US;
    params.dutyValue = 0;
    params.periodUnits = PWM_PERIOD_US;
    params.periodValue = pwmPeriod;
    pwm1 = PWM_open(Board_PWM0, &params);

    if (pwm1 == NULL) {
        System_abort("Board_PWM0 did not open");
    }
    PWM_start(pwm1);
    ledState = 0;

    /* Loop forever toggling the LED based on the value of beatEnable */
    while (1) {
        if (ledState == 0)
        {
            if (ledEnable == LED_ENABLED)
                {
                ledState = 1;
                PWM_setDuty(pwm1,3000);
                }
        }
        else
        {
            ledState = 0;
            PWM_setDuty(pwm1,0);
        }

//        System_printf("in LED task\n");
//        System_flush();

        Task_sleep((UInt) arg0);
    }
}

I was trying to use this to learn how to have separate tasks in TI-RTOS.  

Yes, I declared ledEnable in the global variable area of simple_gatt_profile.c

Thanks,

Jim

Jim,

When you run your code, can you spot your Task on the ROV task list?

To open the ROV, go to menu Tools --> Runtime Object View and then select the option to connect to the running target and browse as shown below (the image will differ on your project)

If the Task is not there or is continuously blocked, then it is not running. Also, check if a breakpoint inside the task is hit - that would be also another indicator.

I will try to think about additional scenarios and report back.

Hope this helps,

Rafael

Hi Rafael,

My redLED task is in main.c but is not part of the main function; I just initialized the task in main().  I can tell that this task is running since I can see the LED toggling at the execution frequency of the redLED task.  

I will try though moving it and the interprocess communication varialbe into the simple_peripheral.c file and see if that works.

I will keep you posted.

Thanks,

Jim