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Firmware for the Dilemma (or really any rp2040 split keyboard) written in Rust

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Rust firmware for the dilemma v2 keyboard

PXL_20230603_221534290.TS.2.mp4

Rusty dilemma is firmware for the Dilemma v2 split keyboard written in Rust using the Embassy framework.

This firmware does a fair amount of 'fun' things such as supporting an external display (and using the awesome Slint GUI library to do the drawing (and anti-aliased fonts are nice)), also the per key rgb animations are pretty damn pretty in my opinion :)

Layout

Default Layout

Features

  • Normal keypresses, mod taps, layers, chords, mouse keys
  • Cirque trackpad support, with support for using it to scroll
  • Some pretty neopixel animations (that sync between sides, and transition smoothly)
  • Support for a st7789 display, using slint to render the UI
  • Single firmware binary, everything works no matter which side is plugged in
  • Double tapping the update button puts the mcu into dfu mode
  • The device pretends to be a RP Pico and supports being put into DFU mode by picotool

Building

You'll need cargo and picotool installed

  • cargo build --release -Zbuild-std=core,alloc,panic_abort -Zbuild-std-features=panic_immediate_abort
    • It's fine to use just cargo build --release here, the extra parameters just make the binary a bit smaller.
  • picotool load -f ./target/thumbv6m-none-eabi/release/boot
    • The bootloader only needs flashing the first time
  • picotool load -f ./target/thumbv6m-none-eabi/release/binary
  • picotool reboot

(You can use either the nix flake or install picotool yourself)

Keymaps

You can use https://github.com/simmsb/keylayout to generate key layouts (and also generate previes of them), check out the one I use

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Firmware for the Dilemma (or really any rp2040 split keyboard) written in Rust

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