# 13 questions

Tagged
• x
33
views
no
1

## saadc - switch channel on demand

I am using a nRF52 and I have to measure two voltages:

1) the first continuously

2) when a command is received, the second voltage have to be measured and then switch back to measure the first

I initialize the ... (more)

104
views
1
vote
1

## Multiple SAADC Channels at different intervals

Hello, I've been reading over different examples and questions on the Nordic Developer Zone but still have some questions about multiple SAADC channels.

1 - If I initialized multiple SAADC channels it goes to scanning mode right? Does this mean ... (more)

77
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no
no

## High Idle Current using SAADC Low Power

I have a 3 channel setup on my SAADC module, which I sample according to a LFCLK timer. I notice after the first called to nrf_drv_saadc_sample() and receipt of the ADC results, it seems the HFCLK is not shutting off ... (more)

210
views
1
vote
1

Hi,

I use the SAADC to sample 2 pins. I use the nrf_drv_saadc, and a timer to call the sample task.

I was trying out several gains for SAADC and I noticed that for gains 1 and 2 (4 not ... (more)

41
views
no
1

## SAADC buffer convert fatal error

Hello,

For my project I need to measure the battery voltage while transmitting data to get a good indication of the battery capacity. I've found an old example (link text) that goes into detail on how to set the ... (more)

78
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no

## Am I not configuring right my SAADC handler for low power?

Hello,

I would like to sample the battery level of my nrf52832 DK and send it through BLE. I have started from the example ble_app_hrs for SDK12.2 since the service was already present and I had just to modify ... (more)

60
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no
no

## Why my adc handler is never triggered? [closed]

Hello,

I am making a battery service to report the battery that is sampled by the SAADC, so far I am am able to compile it and debug it, however I see how my saadc_event_handler_interrupt is never triggered. Which means ... (more)

68
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no
1

## SAADC maintains high current consumption

After performing the first ADC operation (4 channel scan, sample rate controlled from TIMER1), the power consumption stays at almost 4 mA for the nRF52832.

Why?

Initialization code:

    case DRIVER_ADC_IOCTL_START:
if( ioctl )
{
memset( dma_sample_buf, 0, sizeof( dma_sample_buf ));
memset( read_ring_buf, 0 ...
(more)

129
views
no
1

I've recently migrated from SDK11 to SDK12.3 to take advantage of the low power option. However I still am having weird issues with power consumption. I have a feature which enabled ADC measurement. When this feature gets turned ... (more)

38
views
1
vote
1

## SAADC generate only limit events [closed]

Hello to all Nordic jedi masters!

I am using the nRF52832 along with SDK v11.0

I want to have the SAADC generate events only when the converted value is above a certain threshold. I am not interested in the ... (more)

133
views
no
1

## saadc scan output order sdk 12.2.0

The output order of my scanning Saadc is not predictable.

I found two related questions, but they both are for SDK 11 and seem to have been resolved.

https://devzone.nordicsemi.com/questi...

https://devzone.nordicsemi.com/questi...

But they ... (more)

161
views
2
1

What is the right way of stopping and then subsequently re-starting SAADC?

Using the saadc example, I want to be able to stop saadc when a certain pin is grounded or when a certain characteristic is received using BLE. I ... (more)

209
views
1
vote
no

Hi,

What is the valid configuration for SAADC with oversampling for nrf52 sdl12.2

I try

SAADC_CONFIG_OVERSAMPLE 4



TIMER with rate 30000[ms]

app_timer_start(m_adc_timer_id, APP_TIMER_TICKS(ADC_INTERVAL, 0), NULL);


timer_handler

void ...
(more)

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