Building unicast_audio_server for NRF5340 DK

[s23]

Greetings

I am trying to build the unicast_audio_server example application for an NRF5340 DK (Not the audio dk), as advised in this post.

When I try building the application, I get the following error in my terminal: Failed to register ISO server -134; and further on I get a message "<wrn> bt_hci_core: opcode 0x2036 status 0x01
Failed to create advertising set (err -5)".

I've read the README, and seen the instruction " Use `-DEXTRA_CONF_FILE=overlay-bt_ll_sw_split.conf` to enable required ISO feature support in Zephyr Bluetooth Controller on supported boards."

I'm not sure if I added it correctly, but the overlay-bt_ll_sw_split.conf file was an option to be added as a "Kconfig fragment" in my build config, so I went ahead and added it. When I added it to my prj.conf, the build threw a CMake error. From all this, what am I doing wrong? Or is it even possible to build this application for the dev kit that isn't the audio DK?

Any help would be appreciated.

Thank you. 

 

[Amanda Hsieh]

Hi, 

What NCS version are you using?

It requires -DOVERLAY_CONFIG=overlay-bt_ll_sw_split.conf to enable the required ISO feature support when when building targeting an nRF52 series board with the Zephyr Bluetooth Controller. For nRF5340DK, you can use this command to build:

# From the root of the zephyr repository
west build -b nrf5340dk/nrf5340/cpuapp --sysbuild samples/bluetooth/unicast_audio_server/

 

and get the log like this:

Regards,
Amanda H.

[s23]

Hi Amanda

I am using NCS version 2.6.0.

To build the project as it is, I opened VSCode and opened the unicast_audio_server through the SDK. I've copied and pasted the command-line prompt you've suggested and get the following result:

ERROR: source directory samples/bluetooth/unicast_audio_server/ does not exist       
FATAL ERROR: refusing to proceed without --force due to above error

[Amanda Hsieh]

Unhook the the sysbuild option, and create child_image folder to include hci_ipc.conf.  

[s23]

I added the child_image folder to the root of the application and the application was able to be built and I flashed the board but the advertising is still failing, as shown in the image.

[Amanda Hsieh]

Did you include hci_ipc.conf under the child_image folder?

Here is my test project unicast_audio_server.7z.

[s23]

Hi Amanda

I tried building your project and I get CMake errors, as shown in the image.

[Amanda Hsieh]

Seems you are using the v2.5.0 toolchain. 

s23 said:

I am using NCS version 2.6.0.

Because you said you are using v2.6.0, my project is based v2.6.0. Please make sure the toolchain and SDK versions are v2.6.0.

 

[s23]

Hi Amanda

Your application seems to work. I am also able to build and flash the example application and it works now, since I aligned the sdk and toolchain versions. Thank you for your help. For future reference, how would I have known that I needed to add the config files for the child_image?

[Amanda Hsieh]

See this post.