How to use AUX output on nRF5340 Audio DK

[HunterTom]

Hi, I have an nRF5340 Audio DK. As the first step, I want to play a simple 1k Hz tone and output it via the AUX jack on the board.

Is there any related sample code for me to get started with?

Alternatively, I do have an external DAC module that takes in I2S data. Is there any example code that demonstrate how to use I2S feature in nRF Connect SDK?

Thank you!

[dejans]

Hi HunterTom ,

Previously mentioned audio unicast server and audio broadcast sink samples can be configured to use I2S as audio output. There are some limitations on the samples shown in nrf5340 audio feature support. 
You can read more about Zephyr API: I2S interface and I2S driver in the documentation. Additionally, you could look at i2s_master example, I2S echo sample and i2s tests.
For pin control you can look at cpuapp_common-pinctrl and for devicetree at cpuapp_common. General information about devicetree is available in configuring devicetree.

Best regards,
Dejan