PDM example in SDK 15.3.0

[sarnab]

I cannot find an example project for using the PDM module on SDK 15.3.0. Can you please direct me to where I will be able to find such an example project?

Thank you.

[Simonr]

Hi Sarnab

I'm afraid we don't have a PDM example as part of our nRF5 SDK. However, this example for PDM in SDK 11 was made by one of my colleagues and should be usable in newer SDKs with some tweaks.

You could also check out the Thingy:52 SDK which uses the PDM audio drivers.

Best of luck and regards,

Simon

[sarnab]

Is there any other tutorial or example that uses the nRF52840 PDM module with the SD140?

[Simonr]

No, I'm sorry but we do not have any tutorials using the PDM module and the SoftDevice S140. I still think the example from the last reply will be your best bet here. Or we could hope that someone in the community has done something similar before.

Best regards,

Simon

[sara]

Hi, Sarnab I too, have the same question as yours. So how far have you reached?I tried the example which Simonr have provided the link for the example. But I am getting the following errors:

undefined reference to `nrfx_pdm_init' and undefined reference to `nrfx_pdm_start'

@ Simonr if you have any idea about how can I solve the above errors?

[sarnab]

Hi Sara, I was able to get it working though I have not extensively tested if the data is valid. To get the nrfx_pdm_xxx() functions you have to include nrfx_pdm.h in your project. Hope that helps. Also if you are able to get meaningful data please let me know what you did!