Is there an example on how to handle power failure events with s210 (ANT)

[Charles Custon]

Unfortunately, I'm not seeing NRF_EVT_POWER_FAILURE_WARNING events on my s210 based system. As I've seen in other questions on the forum, I've implemented the calls below with no luck. Attempts to use sd_evt_get() were also fruitless. Any ideas? Thank you!

err_code = sd_softdevice_enable(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, softdevice_assert_callback);
APP_ERROR_CHECK(err_code);

err_code = sd_nvic_SetPriority(SD_EVT_IRQn, NRF_APP_PRIORITY_LOW);
APP_ERROR_CHECK(err_code);

err_code = sd_nvic_EnableIRQ(SD_EVT_IRQn);
APP_ERROR_CHECK(err_code);

err_code = sd_power_pof_enable(true);
APP_ERROR_CHECK(err_code);

err_code = sd_power_pof_threshold_set(NRF_POWER_THRESHOLD_V27); /**< 2.5 Volts power failure threshold. */ 
APP_ERROR_CHECK(err_code);


for (;;)
{
            
	err_code = sd_power_pof_enable(false);
	APP_ERROR_CHECK(err_code);

	err_code = sd_app_evt_wait();
	APP_ERROR_CHECK(err_code);

	err_code = sd_power_pof_enable(true);
	APP_ERROR_CHECK(err_code);

	// Extract and process all pending ANT events as
	//long as there are any left.
	do
	{
		// Fetch the event.
		err_code = sd_ant_event_get(&ant_channel, &event_id, event_message_buffer);
		if (err_code == NRF_SUCCESS)
		{
			// Handle event.
			switch (event_id)
			{
			case NRF_EVT_POWER_FAILURE_WARNING:
				set_led(); //never gets called
				break;
			default:
				break;
			}
		}
	} while (err_code == NRF_SUCCESS);
}

[Charles Custon]

I was able to resolve my issue by retrieving the message from within SD_EVT_IRQHandler(). See excerpt below:

void SD_EVT_IRQHandler(void)
{
    uint32_t err_code;
    uint32_t sd_event_id;

	do
	{
		// Fetch the event.
		err_code = sd_evt_get( &sd_event_id);
		if (err_code == NRF_SUCCESS)
		{
			// Handle event.
			switch (sd_event_id)
			{
			case NRF_EVT_POWER_FAILURE_WARNING:
				saveTheWorld();
				break;
			default:
				break;
			}
		}
	} while (err_code == NRF_SUCCESS);
}