RE: PDM microphone not working with nRF Connect SDK

Kenneth — Fri, 25 Mar 2022 12:12:57 GMT

It looks like you are using the nrfx api directly, in that case you also need to define the pdm interrupt handler by using the IRQ_CONNECT() as shown for instance in this example using nrfx gpiote: https://github.com/nrfconnect/sdk-zephyr/blob/main/samples/boards/nrf/nrfx/src/main.c#L35

Another example using nrfx is found here:
https://devzone.nordicsemi.com/f/nordic-q-a/71737/lpcomp-in-ncs-zephyr-on-nrf52/

I don't know a specific example using PDM, but the above should show how you can use the nrfx api.

I recommend to also check if any of the api calls return an error code, seems you are not doing this at the moment (e.g. nrfx_pdm_init() you don't check if there is an error).