SAADC using local timer

RE: SAADC using local timer

NewtoM — Fri, 01 Dec 2017 23:14:00 GMT

Thank you! I hope to see some local timer example, too, in one of the upcoming SDK versions. :) Tamas

RE: SAADC using local timer

ovrebekk — Fri, 01 Dec 2017 13:02:26 GMT

Starting the SAADC module will only set up the DMA interface and prepare the ADC for sampling. To start the actual sampling you have to trigger the SAMPLE task as well.

Often these two activities are handled separately. You have to start the ADC to change the RAM buffer, while sampling typically occurs more often.

Best regards
Torbjørn

RE: SAADC using local timer

NewtoM — Thu, 30 Nov 2017 22:06:39 GMT

I have some progress. I have just noticed that if after triggering the START task I also trigger the SAMPLE task, the values in my target array are indeed overwritten by some new values. So is this the way?

nrf_saadc_task_trigger(NRF_SAADC_TASK_START);
nrf_saadc_task_trigger(NRF_SAADC_TASK_SAMPLE);

I can't find in the documentation why both tasks should be triggered.