Multicore sample for the 54L15

RE: Multicore sample for the 54L15

Hieu — Mon, 03 Mar 2025 22:17:38 GMT

The documentation on working with FLPR core is here: Working with the FLPR core.

RE: Multicore sample for the 54L15

AndriiHere — Thu, 27 Feb 2025 22:09:08 GMT

this is actually works!! how did you even figured this out? where can I find documentation about building for flpr core?

RE: Multicore sample for the 54L15

Hieu — Tue, 03 Dec 2024 17:07:42 GMT

Hi Torbjørn,

The snippet needs to be applied only to the cpuapp. When you provide snippet like that, it gets applied to all images.

You will need to use the extra CMake argument menu instead and then put the <application name>_ between -D and SNIPPET, like when you add an extra Kconfig only to a specific image.

For example, my application folder is named icmsg_280, so I specified -Dicmsg_280_SNIPPET=nordic-flpr.

And then you build the sample just once with sysbuild. The remote image will be built automatically from the sysbuild setup. Flashing will also automatically include both cores.

Getting to this point isn't straight forward, sorry. I will relay this experience with the relevant team.

Best regards,

Hieu

RE: Multicore sample for the 54L15

ovrebekk — Mon, 02 Dec 2024 11:03:11 GMT

Hi Hieu

Thanks a lot for the clarification.

Do you know how I should build the sample then?

I tried building the ipc_service/icmsg sample for the 54L appcore with the nordic-flpr snippet selected, but this won't work:

I tried attaching the build log, but attaching files or text is not really working today 😛

Are you supposed to build the sample twice, once for each core, or will sysbuild ensure that a single build can target both the appcore and the FLPR core?

Best regards
Torbjørn

RE: Multicore sample for the 54L15

Hieu — Tue, 26 Nov 2024 14:32:37 GMT

Hi Torbjørn,

For communication between the cores, you use IPC, same as the nRF5340. The sample is here: sdk-zephyr/samples/subsys/ipc/ipc_service/icmsg at v3.7.99-ncs1 · nrfconnect/sdk-zephyr

You will also need to use the snippet nordic-flpr.

RE: Multicore sample for the 54L15

Hieu — Tue, 26 Nov 2024 13:09:55 GMT

Hi Torbjørn,

The AI is confused. The sample you want is zephyr\samples\sysbuild\hello_world.

Exchanging data between them is unfortunately not demonstrated there though :/

Best regards,

Hieu