nrf5340 audio DK build warning

RE: nrf5340 audio DK build warning

Elfving — Mon, 18 Aug 2025 08:22:40 GMT

[quote user="chelalv"]

How can I confirm that overlay-all-bt_ll_sw_split.conf is automatically selected in the project compilation?

[/quote]

You can for instance check if the generated complete sum of configs used in build/.config includes it. Though if zephyr\samples\bluetooth\hci_uart is what you are basing this on then that is probably fine.

[quote user="chelalv"] don't really care whether to use the Zephyr controller or the Nordic softdevice controller right now.[/quote]

Could you try removing BT_CTLR_SDC_PERIPHERAL_COUNT and just using CONFIG_BT_MAX_CONN? Or do you maybe have any other need for this config?

Regards,

Elfving

RE: nrf5340 audio DK build warning

chelalv — Mon, 18 Aug 2025 03:21:05 GMT

I need to use the nrf5340 audio DK as the controller, and I run Bumble (github.com/.../bumble) on PC as the host.

I am using the example zephyr\samples\bluetooth\hci_uart in zephyr.

How can I confirm that overlay-all-bt_ll_sw_split.conf is automatically selected in the project compilation?

Are all the conf files used in compilation generated into build\hci_uart\zephyr\.config?

I see that the compilation command automatically generated by VS Code is:

west build --build-dir c:/ncs/bumble/hci_uart-0815/build c:/ncs/bumble/hci_uart-0815 --pristine --board nrf5340_audio_dk/nrf5340/cpuapp --sysbuild -- -DEXTRA_CONF_FILE=iso.conf -DBOARD_ROOT=c:/ncs/bumble/hci_pstrueb_0813;c:/ncs/bumble/hci_uart-0815;c:/ncs/bumble/hci_uart_0806

-DEXTRA_CONF_FILE=iso.conf instead of overlay-all-bt_ll_sw_split.conf

I don't really care whether to use the Zephyr controller or the Nordic softdevice controller right now.

I learned from the previous post this project needs to add netcore app as ipc radio(devzone.nordicsemi.com/.../there-is-a-problem-sending-auracast

RE: nrf5340 audio DK build warning

Elfving — Fri, 15 Aug 2025 09:28:17 GMT

Hello,

It looks like the iso.conf file was taken into account in the build, but you also need to select the configurations that the ones you selected are dependent on.

If you are for instance not using an application that uses the Nordic softdevice controller (SDC) BLE Controller, then neither setting BT_CTLR_SDC_PERIPHERAL_COUNT nor BT_LL_SOFTDEVICE would make sense. Is this audio app you are using based on Zephyr sample? If so, I think it automatically selects the zephyr controller using CONFIG_BT_LL_SW_SPLIT.

For more info on how to set up a project on how to configure it, we have a lot of docs available for this as well as of course the DevAcademy courses.

[quote user=""]

If I want these conf files to take effect, do I need to select the dependencies in the Kconfig GUI?

[/quote]

Either there or just by modifying your conf files, the GUI is just there to make editing the files easier.

[quote user=""]

This project has two configs, app core and net core. Which core should I set it in?

[/quote]

I often find that I need to enable it on both, though try just the application core first.

Regards,

Elfving