Merging application core and net core hex files

RE: Merging application core and net core hex files

Sigurd — Thu, 06 Mar 2025 19:26:09 GMT

Hi!

[quote user="parksj10"]To confirm, I now have to either manually merge the hex files or flash two separate ones?[/quote]

Correct.

[quote user="parksj10"]why was this removed? [/quote]

For a long time nrfjprog did not support flashing this kind of multi-core hex file to both cores at the same time, it's just in a more recent version this support was added.

The build system /west actually never supported it, and it splits the merged_domains into seperate hex files before flashing them when using nrfjprog as runner. So sysbuild did not consider creating merged_domains.hex as relevant. Maybe we can add merged_domains.hex back in a future version.

RE: Merging application core and net core hex files

parksj10 — Tue, 04 Mar 2025 16:33:25 GMT

Thanks, why was this removed? To confirm, I now have to either manually merge the hex files or flash two separate ones?

RE: Merging application core and net core hex files

Sigurd — Tue, 04 Mar 2025 12:44:31 GMT

Hi!

[quote user="parksj10"]These are all the files I see. I have SDK 2.9.0 installed.[/quote]

In the later versions, including 2.9.0, the merged_domains is no longer used.

https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/releases_and_maturity/migration/migration_sysbuild.html#filename_changes

So then mergehex is the only option.

RE: Merging application core and net core hex files

parksj10 — Sat, 01 Mar 2025 00:02:41 GMT

These are all the files I see. I have SDK 2.9.0 installed... Considering I'm not getting the merged_domains.hex, I'm not sure it matters, but I have nrfjprog 10.24.2

RE: Merging application core and net core hex files

Sigurd — Fri, 21 Feb 2025 12:24:12 GMT

Hi!

Depending on what SDK version you are using, you might have a merged_domains.hex , that contains both APP and NET core image. Program it like this:

nrfjprog -f NRF53 --program zephyr/merged_domains.hex --recover --verify

PS: you need at least nrfjprog version 10.21.0 or newer.