ADC on SAMR21-xpro

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1

Hi Rioters, I’ve some troubles about using the ADC on the SAMR21-XPRO board. At now, i’ve added the libraries and required features for it, it compiles and i can use the “periph_adc” test, but i’m not able to find which GPIO are used for the ADC.

In less words, i need an help to start using the ADC lines for a moisture sensor.

I’ve found the watr-li tutorial (http://watr.li/Sensing-moisture.html), but is deprecated.

There is someone who can drive me about it?

Thanks a lot,

2

Hi Alessandro,

what is your code base? If you have adapted this PR (as I proposed some time ago)

https://github.com/RIOT-OS/RIOT/pull/4162/

it should be PA6, PA7, PA8, PA9, PB2, PB3 according to the ADC channel. Compare this configuration:

https://github.com/RIOT-OS/RIOT/pull/4162/files#diff-134bda29ded96fa4abaa9f99216a6116R325

Best regards Peter