RE: timer handler never called

Ole Morten — Mon, 20 Jan 2014 09:27:56 GMT

This isn't very obvious, but when not using the softdevice, you have to start the LFCLK manually, to make the RTC run at all. You can refer to the RTC example for an example of how to do so, which uses a snippet like this:


static void lfclk_config(void)
{
    NRF_CLOCK->LFCLKSRC             = (CLOCK_LFCLKSRC_SRC_Xtal << 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;
}