ADC init problem

RE: ADC init problem

Karl Ylvisaker — Tue, 03 Nov 2020 09:21:32 GMT

Hello Peaker,

[quote user="peaker.zhang"]Can I change the number to 12 ? I want to use more channels.[/quote]

Unfortunately no, regardless of that define the SAADC peripheral may only use up to eight channels, as specified in the SAADC peripheral documentation. The channels are used to control the mux and sampling pin configuration.

Best regards,
Karl

RE: ADC init problem

peaker2016 — Tue, 03 Nov 2020 01:05:47 GMT

HI Karl,

Can I change the number to 12 ? I want to use more channels.

Best regards

Peaker

RE: ADC init problem

Karl Ylvisaker — Fri, 30 Oct 2020 09:21:13 GMT

Hello Peaker,

[quote user="peaker.zhang"]I didn't find any problems in my use. I just want to confirm it from you.[/quote]

Oh, I understand. Thank you for clarifying!
As far as I can see your proposed implementation should work just fine - but I urge you to add the APP_ERROR_CHECKS that I mentioned in my previous comment.

Please do not hesitate to open a new ticket in the future if you should encounter any issues or questions.

Good luck with your development!

Best regards,
Karl

RE: ADC init problem

peaker2016 — Fri, 30 Oct 2020 02:57:43 GMT

Hi Karl,

Thanks!

I didn't find any problems in my use. I just want to confirm it from you.

Best regards,

Peaker

RE: ADC init problem

Karl Ylvisaker — Thu, 29 Oct 2020 13:47:38 GMT

Hello,

[quote user=""]If an ADC input is multiplexed in different ADC channels , is the ADC data still dependable?[/quote]

I would think this should be no problem at all. The channels are multiplexed, as you said, so the pins will not actually be sampled at the same time either way.
So, I do not see any reason why this should not work.
Are you getting any unexpected behavior when you run this initialization? If so, what are you observing, and how is it different from what you would have expected?

I notice that you do not perform an APP_ERROR_CHECK on every returned error code. You should make sure that every returned error code is checked.

For future reference, please use the "Insert -> Code" option when sharing code on the forum. This drastically increases readability.

Best regards,
Karl