Cannot build I2S echo application for NRF5340

[TomHe]

Hi, I am a beginner into the embedded audio space, and happened upon this board to use for our university project. Our team's current plan would be to produce audio directly on the board and play it through the headphone jack, but have not found much success with the NRF5340 Audio application, as it has a lot of integration with Bluetooth (which we don't need for now). Right now we just need a simple application that plays a tune on the board.

In my search I have found the I2S echo application, which seems like a simple start for our use case. However, when trying to build the application we encountered the following error:

-- Found BOARD.dts: C:/ncs/v2.6.2/zephyr/boards/arm/nrf5340_audio_dk_nrf5340/nrf5340_audio_dk_nrf5340_cpuapp.dts
-- Found devicetree overlay: boards/nrf5340dk_nrf5340_cpuapp.overlay
devicetree error: pinctrl-names property in /soc/peripheral@50000000/i2s@28000 in C:/ncs/v2.6.2/zephyr/misc/empty_file.c has 1 strings, expected 2 strings

This is our build configuration (all other options left as default):

SDK version:

Any help would be appreciated! Thanks!

[ace.johnny]

 TomHe, you should post this as a github repo exactly as is. Pick a name of your choosing (I suggest nrfadk-audio_i2s_sine1k to indicate that it's part of a collection of similar examples, but search your heart.)

I want to use this as the absolute bare minimum infrastructure required to be compatible with the nrf5340_audio application, and as I tear this asunder, I want to continue the code tree from you. Then I can fork your seminal repo and contribute to you via pull requests, and you can sync updates to me via releases and branches as necessary.

And not only will it be a way for us to compatibly collaborate from the very first Initial commit, but it can be a searchable resource for others just beginning their Audio DK studies, rather than a zip file buried in the vendor support forum.

Please don't succumb to the temptation to "just add one more thing." Post it exactly as is, then share the link and edit the github repo so that I can pull your changes too.

[TomHe]

Hi Johnny, here is the github repo I've just created: https://github.com/Tom2096/nrfadk-audio_i2s_sine1k

Some plans I have for this moving forward:

- Use zephyr ring buffer to supply data into audio_i2s_set_next_buf

- Play around with setting channels=2 for cleaner code

- Eventually write a true I2S echo application to echo microphone input  

- Get rid of all the unnecessary modules/drivers that are not used from the nrf5340_audio application

Hope you find this repo useful!