Why gpiote_init used 2 times?

[renu]

Hi All,

     i would like to know in ble_app_hrs example gpiote_init() is called from main
     and then again called in led_start for what purpose it used in 2 place.

     can anyone  please share information related to it.

Thanks

[Håkon Alseth]

You have two gpiote_init() functions.

In main.c:

static void gpiote_init(void)
{
    APP_GPIOTE_INIT(APP_GPIOTE_MAX_USERS);
}

And in led.c:

static void gpiote_init(void)
{
    // Configure the GPIOTE Task to toggle the LED state.
    nrf_gpiote_task_config(GPIOTE_CHAN_FOR_LED_TASK,
                           ADVERTISING_LED_PIN_NO,
                           NRF_GPIOTE_POLARITY_TOGGLE,
                           NRF_GPIOTE_INITIAL_VALUE_LOW);
}

These are both static functions, meaning that they do not "exist" outside the file that they are declared in. The gpiote_init in main.c initializes the GPIOTE module with APP_GPIOTE_MAX_USERS, while the one in led.c makes use of the GPIOTE task and configures it. The PPI module then assigns the NRF_TIMER1->EVENTS_COMPARE[0] to the previously configured GPIOTE task.