Fast advertising timeout seems to stop RTC2

[Ivan Herrera]

This is my RTC init function. Whenever I start advertising in fast-advertising mode, and timeout for fast advertising expires, the RTC2 timer stops running and COUNTER resets to 0. I can't find anywhere that the advertising module uses RTC2 though. I'm using SDK17 with s132. When I set adv_fast to 0 thus disabling the timeout RTC2 keeps running.

void prox_rtc_init(void)
{
    // Configure the RTC for 1 minute wakeup (default)
    RTC2->PRESCALER = 0x147;
    RTC2->EVTENSET = RTC_EVTENSET_COMPARE0_Msk | RTC_EVTENSET_OVRFLW_Msk;
    RTC2->INTENSET = RTC_INTENSET_COMPARE0_Msk | RTC_INTENSET_OVRFLW_Msk;
    RTC2->CC[0] = 1000;
    RTC2->TASKS_START = 1;
    NVIC_SetPriority(PROX_RTC_IRQn, PROX_RTC_IRQ_Priority);
    NVIC_EnableIRQ(PROX_RTC_IRQn);  
}

[Vidar Berg]

Hello,

RTC2 should normally not have been affected by the adv. timeout. The Softdevice and SDK modules use RTC0 and RTC1 respectively. Does your app do anything when advertising has timed out (ie on BLE_ADV_EVT_IDLE event). Like attempting to enter System OFF (Deep sleep)

[Ivan Herrera]

Correct, it has 

sleep_mode_enter();

And thus go into POWER OFF mode. Thanks for pointing this out, sorry for the trouble!