nRF 52832 power consumption SAADC/PPI/TIMER

RE: nRF 52832 power consumption SAADC/PPI/TIMER

Øyvind — Wed, 20 Mar 2019 13:11:31 GMT

Good to hear you found the solution!
-Oeyvind

RE: nRF 52832 power consumption SAADC/PPI/TIMER

NORDIC_SUR — Wed, 20 Mar 2019 02:41:00 GMT

now I use the code like this:

void ADC_PWM_INIT(void)
{
	saadc_init();  //init adc
	nrf_saadc_enable();//enable adc
	saadc_sampling_event_init();
	saadc_sampling_event_enable();
}

init ADC at first.and then use start and stop funtion to control ADC.

void ADC_PWM_STOP(void)
{
	nrf_drv_timer_disable(&m_timer);
	nrf_saadc_task_trigger(NRF_SAADC_TASK_STOP);
	nrf_saadc_event_clear(NRF_SAADC_EVENT_STARTED);
	nrf_saadc_event_clear(NRF_SAADC_EVENT_END);
	nrf_saadc_disable();
}

void ADC_PWM_START(void)
{
	nrf_saadc_enable();
	nrf_saadc_task_trigger(NRF_SAADC_TASK_START);
	nrf_drv_timer_enable(&m_timer);
}

I found that when stop ADC,it will have more 500uA if you don't disable the timer.

RE: nRF 52832 power consumption SAADC/PPI/TIMER

Øyvind — Tue, 12 Mar 2019 08:18:33 GMT

I tried that solution as well but was not successful. Can you show me how you solved this?

Thanks!

Kind regards,
Oeyvind

RE: nRF 52832 power consumption SAADC/PPI/TIMER

NORDIC_SUR — Tue, 12 Mar 2019 07:54:25 GMT

thank you ,for you answer.I know the reson now.

ADC_init at first,and then must delay 1ms before ADC_uinit.

RE: nRF 52832 power consumption SAADC/PPI/TIMER

Øyvind — Thu, 07 Mar 2019 15:01:39 GMT

Hello,

I've replicated your issue, and can't find any solution. The problem seems to be that the SAADC does not completely disable.

If there is no reason for why you are using SDK 11, can you please try with e.g. SDKv15.3 instead? Go here to download: https://www.nordicsemi.com/Software-and-Tools/Software/nRF5-SDK/Download#infotabs

With newer SDK there is a low power setting which should turn the SAADC completely off.

Kind regards,
Oeyvind