RE: Reading ADC value in nrf52805

Karl Ylvisaker — Mon, 07 Sep 2020 06:36:56 GMT

Hello,

[quote user=""]I have the following code found in the internet.[/quote]

Where is this code from?

[quote user=""]The voltage input on both channels is 1.2V.[/quote]

How have you verified / set this up? Have you measured the voltage input to the channels with an external multimeter / oscilloscope?

It seems to me that you are never setting the channels to point to your AIN2 and AIN3 pins - you are using different channels, but both channels are set up to measure VDD.
What is your VDD, by the way?
Is there a particular reason for why you would like to manipulate the registers directly, instead of using the nrfx driver or legacy driver?
I would highly recommend making use of the drivers, since they do all this ground work for you - so that you do not have to look into every register yourself.

For future reference, please use the "Insert -> Code" option when sharing code in the forum for increased readability.

Best regards,
Karl

RE: Reading ADC value in nrf52805

rmptxf — Sun, 06 Sep 2020 09:28:07 GMT

Hi,

Here is a simpler SAADC example to look into for configuring channels, and read adc measurements also converting that to voltage measurements.

https://github.com/rmptxf/nrf52_saadc_simplified

Best regards,

rmptxf