Custom I2S audio Hardware

[Gerry]

Hi Nordic team

I work with 2 NRF5340-AUDIO-DKs (LE audio) and now switch to custom HW on the sink side. Since we only need 3W stereo output we work with 2 MAX98357A

We would like to be compatible with the NRF5340-AUDIO-DK software example and so we tried to connect I2S according to the schematics of the DK.

Could someone please check if that is correct? What would we have to modify in the software example to get the audio output working?

Best regards

Gerry

[Bendik Heiskel]

Hi Gerry,

The I2S lines are connected the same as on the Audio DK. I'm not sure if you need any modifications to the software, but  I will check with our LE audio expert and get back to you.

 

Best regards,

Bendik

[Gerry]

Thanks Bendik

[Bendik Heiskel]

Hi again Gerry,

Sorry for the delay.

There are some modifications to the software required when not using the Cirius Logic HW codec chip. All calls specific to the CS47L63 must be removed from the application. Additionally since you are not using a PMIC all calls related to this must also be removed.

 

Best regards,

Bendik

[Gerry]

Thanks Bendik, Seems easy, I'll try that.

[Gerry]

unfortunately this did not work for me. also see end of this post