PDMMIC integtarion

RE: PDMMIC integtarion

ATHULYA SHAJI — Tue, 16 Aug 2022 06:15:04 GMT

Thank you

RE: PDMMIC integtarion

Maria Gilje — Fri, 12 Aug 2022 13:53:36 GMT

Hello,

INMP441 does not have a PDM interface, but an I2S interface. Apologies for not noticing this sooner. The documentation for the nrfx i2s driver is found here. Zephyr also has an example for using the Zephyr i2s driver. The documentation for the Zephyr I2S driver/API is found here, and the documentation for the example is found here.

Best regards,

Maria

RE: PDMMIC integtarion

ATHULYA SHAJI — Fri, 12 Aug 2022 07:17:11 GMT

Sorry, It is INMP441

RE: PDMMIC integtarion

ATHULYA SHAJI — Fri, 12 Aug 2022 07:16:03 GMT

I am tried to get spl value in dB. But I got constent spl value in all time. I used pdm mic INM441.

RE: PDMMIC integtarion

Maria Gilje — Fri, 12 Aug 2022 06:50:57 GMT

Hello,

Could you please elaborate?

Do you get any errors when building, or is it when running the program on your hardware that the driver does not work?

Are you using a custom board or a DK?

Best regards,

Maria

RE: PDMMIC integtarion

ATHULYA SHAJI — Fri, 12 Aug 2022 06:35:10 GMT

I tried this driver.But it dose not work.

RE: PDMMIC integtarion

Maria Gilje — Mon, 08 Aug 2022 07:22:57 GMT

Hello,

I am sorry for the delay.

An example for how a PDM driver is configured for an nRF52 device can be found in the source code for the Thingy:52 application. It is available here on github. Please note that it is an nRF5 SDK project, and the libraries differ from nRF Connect SDK.

Zephyr also has a driver for a digital PDM microphone, which can be found here.

BR,

Maria

RE: PDMMIC integtarion

ATHULYA SHAJI — Fri, 05 Aug 2022 04:12:00 GMT

Thank you.

RE: PDMMIC integtarion

Maria Gilje — Thu, 04 Aug 2022 15:13:52 GMT

Hello,

I am currently looking into your code and looking for supporting code to assist you. I will get back to you tomorrow. Thank you for your patience.

Kind Regards,

Maria