nRF5340 - Zephyr DMA ADC Example

[Sri_guy]

I am working with the nRF5340 DK.

I am looking to sample an ADC pin to sample at a sampling frequency of at least 1kHz and I would like to use DMA to write the data directly to memory while freeing the CPU. 

I tried reading the nRFConnect SDK and Zephyr documentation for details on setting DMA transfers but little guidance found on setting it up. Can someone explain how to set up DMA or point me to example code?

Thanks

[Marjeris Romero]

Hi,

SAADC in nRF53 always uses EasyDMA: https://infocenter.nordicsemi.com/topic/ps_nrf5340/saadc.html?cp=3_0_0_6_28_5#saadc_easydma

So there is no need to configure EasyDMA specifically for SAADC.

Best regards,

Marjeris

[whati001]

Sorry for the down vote, but I am currently facing the same problem and the answer does not help much if somebody tries to get started with the entire nrf ecosystem.

This question helped me a lot: https://devzone.nordicsemi.com/f/nordic-q-a/78191/simple-example-adc-for-nrf5340-pdk

It links to some sample code: https://github.com/crfosse/ncs_projects/tree/main/peripheral_zephyr/adc

The code seems to sample port P0.04 (A0).