SDK 2.6.3, nRF5340 and how to customize DTM example

RE: SDK 2.6.3, nRF5340 and how to customize DTM example

Riccardo Gaiati — Thu, 10 Apr 2025 14:38:22 GMT

Anytime

RE: SDK 2.6.3, nRF5340 and how to customize DTM example

Kenneth — Thu, 10 Apr 2025 13:35:38 GMT

Thanks for sharing, this may be useful for others also.

Kenneth

RE: SDK 2.6.3, nRF5340 and how to customize DTM example

Riccardo Gaiati — Thu, 10 Apr 2025 11:57:19 GMT

Actually it is possible.
I managed to do what I was asking in this ticket:

Build the DTM example for nrf5340 with SDK 2.6.3 for both the core WITHOUT copying any of the files from the SDK; use the CMakeLists.txt file reported above.
Inject some code into the child image (remote shell) without affecting any code in the sample.
Customize the TX and RX pin of the UART used to communicate with the app core

I had to create a a module in the child_image/remote_shell where my custom c file is compiled and linked.

In order to the custom code to be executed, i put the function in the macro SYS_INIT.

The reason behind to do this is basically to not have to bring in my repo all the code from a sample that i do not want to change.

If there is another way to achieve that, I would be very happy to know.

Thanks

RE: SDK 2.6.3, nRF5340 and how to customize DTM example

Riccardo Gaiati — Wed, 09 Apr 2025 12:17:40 GMT

Hi Kenneth,

i am trying to understand if it is possible to NOT COPY all the code of the DTM example in my repo, inject some modification in the child image (that is the app core) and build it via the CMakeLists.txt file i posted above.

I managed to do the first part: have the example built without copying the code and tested on my custom board.

What i miss is the possibility to inject some code in the child image.

But probably it is not..

RE: SDK 2.6.3, nRF5340 and how to customize DTM example

Kenneth — Wed, 09 Apr 2025 12:11:08 GMT

Hello,

Sorry, it's not clear to me what you are really trying to solve here, you are of course free to do whatever you like. Normally if you plan to modify an existing NCS example the best is to copy it to somewhere outside of the NCS and modify and add overlays as you want.

Kenneth