Application Timer not firing interrupt

[Chitra]

Hi 

I'm trying to get the application timer working  on nrf52840 SDK version 17.02

I have followed the below link 

devzone.nordicsemi.com/.../application-timer-tutorial 

But I see that the app timer interrupt handler never gets called.

Here is the code snippet. I don't see any errors during timer create and start routines.

Any help would be appreciated.

Thanks,

Chitra 

static void adv_timeout_handler(void *p_context) {
UNUSED_PARAMETER(p_context);

NRF_LOG_INFO("In  adv_timeout_handler");

}

static void timers_init(void)
{

// while(nrf_drv_clock_lfclk_is_running());
ret_code_t err_code = app_timer_init();
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("app_timer_init error %d.", err_code);

#if 1
err_code = app_timer_create(&m_timer_id,
APP_TIMER_MODE_REPEATED,
adv_timeout_handler);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("app_timer_create error %d.", err_code);

}

void application_timer_start(void)
{

ret_code_t err_code;

err_code = app_timer_start(m_timer_id, APP_TIMER_TICKS(500), NULL);
APP_ERROR_CHECK(err_code);
NRF_LOG_INFO("app_timer_start error %d.", err_code);

}

main()

{

 ret_code_t err_code = nrf_drv_clock_init();
  APP_ERROR_CHECK(err_code);
  nrf_drv_clock_lfclk_request(NULL);

  timers_init();

  ble_stack_init();

  nrf_pwr_mgmt_init();

 application_timer_start();

 while (true)
 {

  nrf_pwr_mgmt_run();

  }

}

[Chitra]

Just forgot to mention that I'm using scheduler also I have enabled APP_TIMER_CONFIG_USE_SCHEDULER in the sdk_config.h 

Thanks,

Chitra

[Kenneth]

If you are using the scheduler you should also include app_sched_execute() in your infinite main()-loop, for instance you can look at the HID mouse example that use app_timer with scheduler:

/**@brief Function for handling the idle state (main loop).
 *
 * @details If there is no pending log operation, then sleep until next the next event occurs.
 */
static void idle_state_handle(void)
{
    app_sched_execute();
    if (NRF_LOG_PROCESS() == false)
    {
        nrf_pwr_mgmt_run();
    }
}

[Chitra]

Hi Kenneth,

Thanks for your reply.

I have modified the infinite loop of main() as per your suggestion but the issue still persists.

Regards,

Chitra

[Kenneth]

I suggest to take a look at some of the ble peripheral examples that use app_timer, and in specific likely the hid mouse and keyboard example that also use the scheduler if you want to use that. It's likely something obvious once you find it, but you just need to look at the init in those projects and sdk_config.h options for app_timer.

Kenneth