Audio DMIC driver

[Rink]

Hello there ,

Can I use audio DMIC driver for MP34DT05-A PDM based sensor implementation . I cant find any reference  regarding this driver .

I used nrf52840DK board and MP34DT05-A sensor .

[Rink]

Actully I find one microphone example on nrf ncs folder but that example for 96b_argonkey board , i checked that dts file in that file i2s drivers are there but when i checked nrf52840 dts file i cant find any i2s related driver so what can i do .

[Sigurd]

Hi,

Rink said:

i cant find any i2s related driver

Right now there is no Zephyr i2s API driver support for nRF52. There was some ongoing work to add Zephyr i2s API driver support in this PR: https://github.com/zephyrproject-rtos/zephyr/pull/19436 but it seems like the activity on that PR has stalled.

It's possible to use the nrfx driver, https://github.com/zephyrproject-rtos/hal_nordic/blob/master/nrfx/drivers/src/nrfx_i2s.c, but you need to use the nrfx functions directly, and you won't be able to use the Zephyr i2s API for that.

[Rink]

Hello Sir,

I tried your solution but it can not run , still gives error , what can I do Sir , there are any other solution apart from  this ?

[Sigurd]

As of now, you would need to use nrfx driver directly. An intern here at Nordic made an nrfx I2S sample for NCS last summer that might give you some guidance on how to go about it, you can check it out here: https://github.com/siguhe/NCS_I2S_nrfx_driver_example