Clock callbacks are not getting called - CC1310

krishna chaitanya mukkera

Hello,

I am not seeing the clock call back getting called.. I don't see the debug prints that I have added. THe code compiles fine, however I don't see the msgs that I have added every 100ms (periodic timer).. I have included the clock.h in the header file.. Also I ensure that in the .cfg file the clock module has been selected.

Can you please suggest where the problem might be?

Void pa_bcs_invoke_controller_interrupt(UArg arg0)
{
Bool exit_api = FALSE;

Display_Params params;
      Display_Params_init(&params);
        params.lineClearMode = DISPLAY_CLEAR_BOTH;
        Display_Handle lcdDisplayHandle1 = Display_open(Display_Type_LCD, &params);

if (++display_line_num > 5)
{
display_line_num = 0;
}
Display_print0(lcdDisplayHandle1, ++display_line_num, 0, "PA_BCS: Invoke Controller \n");
Semaphore_pend(semHandle1, BIOS_WAIT_FOREVER);
while (1)

..........

* ======== main ========
*/
int main(void)
{
Semaphore_Params semParams;
Semaphore_Params semParams1;
/* Call board init functions. */
Board_initGeneral();

    /* Open LED pins */
    ledPinHandle = PIN_open(&ledPinState, pinTable);
    if(!ledPinHandle)
    {
        System_abort("Error initializing board LED pins\n");
    }

    /* Construct a Semaphore object to be use as a resource lock, inital count 1 */
    Semaphore_Params_init(&semParams);
    Semaphore_construct(&semStruct, 1, &semParams);

/* Obtain instance handle */
semHandle = Semaphore_handle(&semStruct);

Semaphore_Params_init(&semParams1);
Semaphore_construct(&semStruct1, 1, &semParams1);

/* Obtain instance handle */
semHandle1 = Semaphore_handle(&semStruct1);

    /* Construct BIOS Objects */
                /*Setup clock for every 100ms*/
      Clock_Params clkParams;
      Clock_Params_init(&clkParams);
      clkParams.period = 100000/Clock_tickPeriod;
      clkParams.startFlag = TRUE;

     /* Construct a periodic Clock Instance */
      Clock_construct(&clk0Struct, (Clock_FuncPtr)pa_bcs_invoke_controller_interrupt,
                         100000/Clock_tickPeriod, &clkParams);

/* Initialize task */
TaskInit();

/* Start BIOS */
BIOS_start();

return (0);
}

Thanks,

krishna

over 7 years ago

0 TopCat over 7 years ago

TI__Genius 9180 points

You are calling Display Driver functions from your callback, it is not possible to do this in a HWI context, it must be done in a Task context. You need to configure the display in the Task and then post a semaphore or event from the clock callback and unblock the task function to write to the Display.

0 krishna chaitanya mukkera over 7 years ago in reply to TopCat

Prodigy 30 points

Thanks. Would you be able to provide an example for the same?

Btw, I have also added the Sytem_printf in the clock callback and I don't see those messages being outputted in the console as well

0 Michel Solecki over 7 years ago in reply to krishna chaitanya mukkera

Mastermind 8415 points

Hi,

There are a few problems with your code. TopCat already mentioned one problem, but you are also using a Semaphore_pend inside your ISR which is not possible. I am not sure whether you didn't format your code properly, but the semaphore_pend would seize your MCU.

What you will need to do:
Create an additional semaphore to synchronize and signal your events. (with start count = 0)
Create a task that will wait for the semaphore
Post your semaphore inside your clock callback function

Here is a skeleton of the code to show what you could do:

void main(void){
  //do your init stuff here

  //Create and instantiate your clock here

  //Create a semaphore to notify of events (yourSemaphore)

  //Create a task here (in this case TaskFxn)

BIOS_start();
}

Void TaskFxn(Uarg a0, UArga1){
  //Open your display here
  Display_Params params;
  Display_Params_init(&params);
  params.lineClearMode = DISPLAY_CLEAR_BOTH;
  Display_Handle  lcdDisplayHandle1 = Display_open(Display_Type_LCD, &params);

  Semaphore_pend(yourSemaphore);

  //Do you display and printf stuff here
  //you can add any kind of logic that you want here
}

Void pa_bcs_invoke_controller_interrupt(UArg arg0){
  Semaphore_post(yourSemaphore);
}

I hope this helps.

Michel

Sub-1 GHz

Sub-1 GHz forum

Clock callbacks are not getting called - CC1310