Gabe/techWebsite
1
0
Fork 0
Code Issues 8 Pull requests Projects 1 Releases Wiki Activity

more on rmk.

Browse source
This commit is contained in:
Gabe Venberg 2025-03-17 19:49:23 +01:00
parent 1f9e35d503
commit d07e024891
1 changed files with 16 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

16
content/posts/rmk-ferris-sweep/index.md
View file

@ -47,4 +47,20 @@ My [keymap](https://github.com/gabevenberg/qmk_firmware/blob/personal/keyboards/
is a bit complex, so it took some time to port.
It was mostly tedium rather than anything truly headscratching, however.
Next, and the most complicated step, was creating a `vial.json`.
The json file [provided by the via project](https://github.com/the-via/keyboards/blob/master/src/ferris/sweep/sweep.json) was wrong,
as it layed out the keyboard as a 8x5, rather than a 4x10 that I had done in rmk.
So I had to take that file, load it into the [keyboard layout editor](https://www.keyboard-layout-editor.com/),
and follow [vials guide](https://get.vial.today/docs/porting-to-via.html) to remake the `vial.json` in the right layout.
Finally, I could flash my keyboard.
I flashed it, and... It didnt work.
The left hand side, the one plugged into USB, worked fine, all keys worked.
But the right hand side, connected to the main by TRRS, did nothing.
A day or 2 of investigation later revealed that the half-duplex serial implementation
only used the RP2040s internal pull-up resistors, which for my keyboard and TRRS cable,
were insufficient for a baud rate of 115200.
This was (temporarily) fixed by setting a lower baud rate,
but for the long term, ive made a PR mirroring [QMKs solution](https://github.com/qmk/qmk_firmware/blob/6d0e5728aa61b442885d48caf49d29e5c60e8197/platforms/chibios/drivers/vendor/RP/RP2040/serial_vendor.c#L133) to this problem.
The final file looked like [this](https://github.com/gabevenberg/ferris-sweep-rmk/blob/main/keyboard.toml)