POFWARN Example ?

Question

nRF51822 
 I'm interested in setting up the the POFCON to enable me to get a
POFWARN interrupt when the battery voltage drops below 2.7V. 
 The softdevice is enabled at the time of these calls. 
 The first two calls are fine - (pof_enable and pof_threshold).
But the ClearPending causes an App_Error - err_code = 0x2001
which looks to be an SoC error / SVC handler missing. 
 err_code = sd_power_pof_enable(POWER_POFCON_POF_Enabled);
APP_ERROR_CHECK(err_code);

err_code = sd_power_pof_threshold_set(POWER_POFCON_THRESHOLD_V27);
APP_ERROR_CHECK(err_code);
	
err_code = sd_nvic_ClearPendingIRQ(POWER_CLOCK_IRQn);
APP_ERROR_CHECK(err_code);

err_code = sd_nvic_SetPriority(POWER_CLOCK_IRQn, NRF_APP_PRIORITY_HIGH);
APP_ERROR_CHECK(err_code);

err_code = sd_nvic_EnableIRQ(POWER_CLOCK_IRQn);
APP_ERROR_CHECK(err_code);
 
 I have defined the POWER_CLOCK_INT Handler as below ... 
 void POWER_CLOCK_IRQHandler()
{
LEDState(BLUE_1SEC_BLINK);
} 
 Any suggestions on what I may be doing wrong - or examples that I could reference ? 
 Thanks !
-Tim

Tim Clark · Accepted Answer

Whoops - I keep forgetting that you've got to use the Event System when using the SoftDevice. 
 Changed my code to register for Sys Events (glad that the error codes are clear - or I likely wouldn't have found my way there) - and works perfectly ! 2.69V and my RED LED starts blinkin' :-) 
 err_code = sd_power_pof_enable(POWER_POFCON_POF_Enabled);
APP_ERROR_CHECK(err_code);

err_code = sd_power_pof_threshold_set(POWER_POFCON_THRESHOLD_V27);
APP_ERROR_CHECK(err_code);
	
// Subscribe for Sys events.
err_code = softdevice_sys_evt_handler_set(sys_evt_dispatch);
APP_ERROR_CHECK(err_code);


static void sys_evt_dispatch(uint32_t sys_evt)
{
 if (sys_evt == NRF_EVT_POWER_FAILURE_WARNING)
	{
 LEDState(RED_1SEC_BLINK);
	}
}

POFWARN Example ?

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