nrf52 Application Timer

[yaron]

Hi

I am trying to use nrf52 Application Timer. I followed the instructions in "Application Timer Tutorial" (devzone.nordicsemi.com/.../), but it seems I am missing something. (my code is attached below)

When I debug my code, I get to "RTC1_IRQHandler", which calls "nrf_drv_rtc_int_handler". I get to the line " m_handlersinstance_id;", but there my application crashes, because "m_handlers" var is not initiated.

what am I missing? Thanks Yaron

My code:

// General application timer settings.
#define APP_TIMER_PRESCALER             16    // Value of the RTC1 PRESCALER register.
#define APP_TIMER_MAX_TIMERS            2     // Maximum number of timers in this application.
#define APP_TIMER_OP_QUEUE_SIZE         3     // Size of timer operation queues.

static app_timer_id_t                   m_led_a_timer_id;


static void lfclk_request(void)
{
    uint32_t err_code = nrf_drv_clock_init(NULL);
    APP_ERROR_CHECK(err_code);
    nrf_drv_clock_lfclk_request();
}

// Timeout handler for the repeated timer
static void timer_a_handler(void * p_context)
{
  nrf_drv_gpiote_out_toggle(LED_1_PIN);
}


// Create timers
static void create_timers()
{   
    uint32_t err_code;

    // Create timers
    err_code = app_timer_create(&m_led_a_timer_id,
                                APP_TIMER_MODE_REPEATED,
                                timer_a_handler);
    APP_ERROR_CHECK(err_code);
}

int main()
{
   // Request LF clock.
    lfclk_request();
  
   // Initialize the application timer module.
    APP_TIMER_INIT(APP_TIMER_PRESCALER, APP_TIMER_MAX_TIMERS,      APP_TIMER_OP_QUEUE_SIZE, false);
  
  
  create_timers();
  
  uint32_t err_code = app_timer_start(m_led_a_timer_id, APP_TIMER_TICKS(200, APP_TIMER_PRESCALER), NULL);
        APP_ERROR_CHECK(err_code);
       
  while(1);

}

[caram5555]

Hi yaron. In my case when no soft-device is enabled and wants to use timer, I use this function.

A member of Mobilian (http://www.mobilian.biz)

static void lfclk_config(void)
{

    /* enable clock as Internal 32KHz oscillator*/

    NRF_CLOCK->LFCLKSRC            = (CLOCK_LFCLKSRC_SRC_RC << CLOCK_LFCLKSRC_SRC_Pos);
    NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_LFCLKSTART    = 1;

    while (NRF_CLOCK->EVENTS_LFCLKSTARTED == 0)
    {
        /* Do Nothing */
    }
    NRF_CLOCK->EVENTS_LFCLKSTARTED = 0;
}

timer.c