Interfacing the PDM Mic in nrf52832 using NCS3.0

RE: Interfacing the PDM Mic in nrf52832 using NCS3.0

Tarunraj Singh — Wed, 06 Aug 2025 13:20:28 GMT

Thank You So Much Benjamin!!
It worked!!

RE: Interfacing the PDM Mic in nrf52832 using NCS3.0

Benjamin — Wed, 06 Aug 2025 08:20:33 GMT

Hi,
The build fails for the nRF52832 because a required overlay file is missing. To fix this, create a copy of dmic/boards/nrf52840dk_nrf52840.overlay and rename it to dmic/boards/nrf52dk_nrf52832.overlay. I don’t see any differences needed for this overlay, so you can copy it as-is. The build should succeed afterward.

Best regards,
Benjamin

RE: Interfacing the PDM Mic in nrf52832 using NCS3.0

Tarunraj Singh — Wed, 06 Aug 2025 05:11:57 GMT

Hi Benjamin,
Thanks for the response

I have tried the sample example. However, I found out that it is only working with nrf52840dk, not with nrf52832dk.
I tried to build the configurations on both the controller boards, succeeding with nrf52840dk, however failing with nrf52840dk each time.

Is it really the problem of board or I am having some misconception?

RE: Interfacing the PDM Mic in nrf52832 using NCS3.0

Benjamin — Tue, 05 Aug 2025 13:10:39 GMT

Hi Tarunraj,

Have you looked at this sample?

This simple app shows how to use the Audio DMIC API and helps with driver development by doing two PDM transfers with different channel setups, without processing the audio.

Best regards,
Benjamin