RE: Integrating INMP621 pdm microphone with MS12SF1

JONATHAN LL — Thu, 23 May 2024 08:24:16 GMT

Have a look at the steps discussed here: https://devzone.nordicsemi.com/f/nordic-q-a/109455/how-to-use-device-tree-to-set-up-pdm-pin-configurations-with-nrfx-pdm-directly-no-dmic

Regards,
Jonathan

RE: Integrating INMP621 pdm microphone with MS12SF1

Rakshita — Wed, 22 May 2024 14:24:06 GMT

So I have been working on this for very long but the actual thing is that the pdm data which I am getting directly from the microphone looks like

00> [00:09:25.314,758] <inf> mic: PDM buffer data: -1
00>
00> [00:09:25.314,758] <inf> mic: PDM buffer data: -1
00>
00> [00:09:25.314,788] <inf> mic: PDM buffer data: -2
00>
00> [00:09:25.314,788] <inf> mic: PDM buffer data: -2
00>
00> [00:09:25.314,819] <inf> mic: PDM buffer data: -1
00>
00> [00:09:25.314,819] <inf> mic: PDM buffer data: -1
00>
00> [00:09:25.314,849] <inf> mic: PDM buffer data: -1
00>

And this data doesn't even changes after tapping on the microphone also

I had worked with the Thingy53's microphone which is also a PDM microphone, the difference between inmp621 and vm3011 microphones is that in vm3011 i2c is being used (maybe internally also and the pdm data which the microphone gets, it is getting sampled and filtered internally) and there is a possibility that the data which I am getting from inmp621 is not getting filtered or sampled but still when there is a sound the raw pdm data should be changing which it doesn't

RE: Integrating INMP621 pdm microphone with MS12SF1

Amanda Hsieh — Mon, 20 May 2024 12:48:50 GMT

Hello,

Most of the staff is away for a long weekend in Norway, so there will be some delays in response time. Thanks for your patience.