[DRAFT] Feat: add re-gret

[swy7ch]

Add support for re-gret (see https://github.com/rschenk/re-gret/tree/main) using RP2040.

[swy7ch]

Well, it's not going great.

I modified the usual stuff (build.yaml + adding a dedicated keymap), but I'm not sure of what I should do with config/west.yaml. In the original doc for the re-gret, the dedicated module targets zmk@v0.4, which is not the case here I believe (since it's pinned to a particular commit)… Anyhow, it is not clear, and the error message does not help much:

Error: The selected board is not set up for ZMK and there is a
ZMK variant available.
See https://zmk.dev/blog/2025/12/09/zephyr-4-1#zmk-board-variant.

The build can be found here

[swy7ch]

Well, by un-pinning zmk (which I should not do according to this issue), the build passes (for both the re-gret and the others keebs) as you can see here.

Not sure of what I (we?) should do with that 🤷

[swy7ch]

There is an issue with ZMK regarding the builds for daughterboards based on RP2040. See this commit and the issue for ækynox here.

We will probably need to bump ZMK before merging this PR

[Nuclear-Squid]

Hey, sorry for making you wait. The issue seemed to be a lot harder than what it actually was, so I focused on other tasks first. I’d say, in order to keep the commit history a bit clean, I’ll open up another PR to update ZMK’s version in order to fix your original issue, then we’ll be able to merge your PR directly.

[swy7ch]

Hey! No worries, I have ip working on my end so there’s no need to rush. I opened the issue #55 in that regard, to know how we want to do it. I’d gladly help :)

[swy7ch]

I rebased against main and just flashed the keeb, but the alt-gr layer seems bugged. For instance, alt+s gives #, but should give a (. Here’s the output of the alt layer:

^G;$% «&*'`
{#@}= \+/k"
~[]_» |€uUK

I wonder if the problem is the macro FOUR_THUMB_KEYS, defined in config/re-gret.keymap. It is adapted from config/ferris.keymap. see here, but the macro does not seem to be used in the repo. Indeed, aekynox/settings.h defines HT_TWO_THUMB_KEYS.

Using the HT_TWO_THUMB_KEYS does not fix the issue. Maybe setting this in the keymap does carry on to the final build? Setting it in settings.h behaves as expected.

I must point out that I have no quacken or other supported keeb to check if it is a global issue or specific to the re-gret.

It’s all good, I simply forgot to uncomment #define KB_LAYOUT_ERGOL in aekynox/settings.h 🙃

[swy7ch]

The build passed (see https://github.com/swy7ch/zmk-config-aekeynox/actions/runs/27498925972), everything is fine as far as I’m concerned. Marking the PR ready!

[Nuclear-Squid]

LGTM, sorry again for making you wait