Bluetooth wont initialize with custom board based on nRF5340dk

[Chasen]

Hello,

I am working on creating a custom board based off the nrf5340dk_nrf5340 board

I am following the tutorial here

https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-3-adding-custom-board-support/topic/exercise-2-5/

I have an application that functions properly when I build it for the nrf5340dk_nrf5340. However when building for my custom board(which is a direct copy of nrf5340dk_nrf5340), the program runs but the Bluetooth fails to initialize.

[00:00:01.455,780] <err> bt_hci_driver: Endpoint binding failed with -11
[00:00:01.463,165] <err> bt_hci_core: HCI driver open failed (-11)

In both cases I am running off the same hardware nrf5340dk_nrf5340 

[Elfving]

Hello again,

I see now that I was perhaps I was a bit too quick in my previous response. So your custom board is essentially a copy of the 53DK, but is the only difference here, so I guess we can rule out the SW from being the culprit.

I assume you missed something when creating the custom board. Good thing you sent it to me. 

So comparing it to the 5340DK board files, it seems you missed a few files. I assume you've checked that those are okay to skip? And in rxcb_nrf5340_cpuapp.dts there seems to be a typo:

I see you are not enabling trustzone here but I guess that is fine.

Here in rxcb_nrf5340_cpunet.dts there is another typo:

Could you try fixing these typos?

Regards, and have a good week-end,

Elfving

[Chasen]

Hello Elfving,

Thank you again for the prompt response!

So I believe I do have trustzone enabled, looking at defconfig for both boards, the only difference is the board name

As for the other typos you mentioned, may I ask which version of the SDK you are comparing the board file with, in the 2.5.3 I have those lines in nrf5340dk are the same. 

I have attached my nrf5340dk board file just as a sanity check.

nrf5340dk_nrf5340.7z

Thanks again for the assistance.