How to check SAADC is enabled?

[ndarkness]

Hello,

I would like to know how I can check whether the SAADC is enabled or nor on my application. I am disabling the SAADC with nrf_drv_saadc_uninit(); after configuring it, however when my interruption is triggered to sample it seems that the saadc is not started so I would like to check if that's right or not.

Thanks in advance,

[Jørgen Holmefjord]

Hi,

You can check if the SAADC peripheral is enabled by calling the HAL function nrf_saadc_enable_check(), but from your question I'm not sure this is what you want.

If you call nrf_drv_saadc_uninit(), the SAADC driver will be uninitialized, and the peripheral will be disabled. If you try to sample after this, without calling nrf_drv_saadc_init(), you will get an error code.

Best regards,

Jørgen

[Jørgen Holmefjord]

That depends on if you have uninited the SAADC. I suggest you use a flag to know when you have inited/uninited the SAADC, like this:

static uint8_t saadc_is_initialized = false;

uint32_t initialize_saadc()
{
	uint32_t err_code;
	err_code = nrf_drv_saadc_init();
	if(err_code != NRF_SUCCESS)
	{
		return err_code;
	}
	err_code = nrf_drv_saadc_buffer_convert();
	if(err_code != NRF_SUCCESS)
	{
		return err_code;
	}
	saadc_is_initialized = true;
	return err_code;
}

void uninitialize_saadc()
{
	nrf_drv_saadc_uninit();
	saadc_is_initialized = false;
}

void battery_timer_handler()
{
	uint32_t err_code;
	
	if(!saadc_is_initialized)
	{
		err_code = initialize_saadc();
		APP_ERROR_CHECK(err_code);
	}
	
	err_code = nrf_drv_saadc_sample();
	APP_ERROR_CHECK(err_code);
}

void power_manager()
{
	if(saadc_is_initialized)
	{
		uninitialize_saadc();
	}
	
	// Go to sleep
	__WFE();
	__SEV();
	__WFE();
}