RE: SAADC: Switching Channels or reading simultaneously

Kazi Afroza Sultana — Mon, 13 Jan 2025 12:43:44 GMT

Hello Ludwig,

Have you configured channel before setting the advance mode?

''However, for my use case, I need to measure a signal at channel 0 not often (say once every minute) and another signal continuously with a high frequency at channel 1. E.g. measure VDD at channel 0 and some signal from a sensor on channel 1. ''

I have added a previous case link where it is described about implementing different channels sampling at different frequencies. It's not that straight forward though. Two workarounds were mentioned:

a) Sampling all the channels at the same time at high frequency and then discarding the samples that we don't need for slow channel.

b) Reconfiguring the SAADC module every time you want to sample the slow channel, and add the slow channel to the list.

(+) SAADC PPI trigger channels separately - Nordic Q&A - Nordic DevZone - Nordic DevZone