Setting SAADC Resolution

[labeardslee]

I'm working with the SAADC peripheral example and I'm trying to add some code to set the ADC resolution. I've tried doing this several different ways based on what I can find in examples/the API reference, but I keep getting errors. I'm using SDK12.1 and Eclipse Mars.

First method I've tried (I insert this code at the top of my file with the other definitions):

#define SAADC_CONFIG_RESOLUTION NRF_SAADC_RESOLUTION_10BIT Gives an error that "SAADC_CONFIG_RESOLUTION" is redefined.

Second method:

void saadc_init(void) { nrf_drv_saadc_config_t saadc_config; saadc_config.resolution = NRF_SAADC_RESOLUTION_10BIT; ...

This second way I tried to define the resolution gives an error that "saadc_config is set, but not used"

I'm new to C/my nordic board so I assume there's something I'm missing about the structure definition, but I can't figure out the error. Any tips would be great. Thanks!

[Petter Myhre]

What SDK are you using? In the SAADC example in SDK 12.0.1 it seems you modify the resolution by modifying SAADC_CONFIG_RESOLUTION in sdk_config.h

[labeardslee]

Thanks very much! I'm using SDK 12.1. I looked in the SDK Config file for the SAADC example and as you said the resolution is defined there, which explains why I get the error when I try to define it in main. Thanks!

[Petter Myhre]

Great! If I answered your question I would appreciate if you would accept my answer by clicking the grey circle next to it.