Timers not stopping | Telit Cinterion IoT Developer Community

This is a more detailed code that I have used to test.

Basically, it runs on an infinite loop, then starts the timer.
Then, the code falls into an infinite loop doing nothing, so the timer will expire and tries to Stop() and Undef() itself.

I see these two behaviors:

1 - If I leave the Stop() and Undef() in the callback, then a segmantation fault will happen, because Undef() will cause some access violation.
2 - If I comment the Undef() call, and leave only the Stop() un-commented, then the timer will expire, and run again, and expire, run again, which will print the message TIMER EXPIRED, etc.. and repeat.

/* timer_test_cb */

qapi_TIMER_handle_t timer_handle; // global variable for timer handler

void timer_test_cb()
{
  GINA_UWLOG_CRITICAL("TIMER EXPIRED");

  //stop a running timer
  qapi_Timer_stop( timer_handle);
  //Undef the timer. Releases memory allocated in qapi_Timer_Def()
  qapi_Timer_undef(timer_handle);
  
}


/* main func loop */

void main()
{
  while (1) {
    qapi_TIMER_def_attr_t timer_def_attr; 
    timer_def_attr.cb_type = TIMER_FUNC1_CB_TYPE; //notification type
    timer_def_attr.sigs_func_ptr = &timer_test_cb; //callback to call when timer expires
    timer_def_attr.sigs_mask_data = 0x1; //this data will be returned in the callback
    timer_def_attr.deferrable = false; //set to true for non-deferrable timer

    qapi_Timer_def( &timer_handle, &timer_def_attr);

    qapi_TIMER_set_attr_t timer_set_attr; 
    timer_set_attr.reload = FALSE; //Do not restart timer after it expires
    timer_set_attr.time = time_duration; 
    timer_set_attr.unit = T_MSEC; 

    //set or start the timer
    qapi_Timer_set( timer_handle, &timer_set_attr);


    while (1)
      ; /* loop forever here */
  }
}