This is the rustenuine firmware for the Chew keyboard!

It performs some cool hacks that keyboard enthusiasts love:

• Layers
  • Set default
  • Activated as long as a key is held down ❤️
  • Dead key style (activated until another key is pressed or as long as being held)
• Homerows
  • Hold down to activate a modifier
  • Press to print a regular key
• Combos
  • Two keys pressed at once result in a third one
• Leader key
  • Once activated, it allows you to hit a sequence (3 keys max) to produce another key
  • Leave it with Escape or a wrong key
• Mouse emulation
• LED
  • Synchronise the embedded controler's aRGB LED (e.g. for layers, caplock...)
• Buzzer
  • Buzz jingles (and do it in stereo with the split version!)
• No mods
  • Prevent modifiers with specific keys (e.g. no shifted symbols)
• Caplock
  • Deactivated by itself or Escape
• Macros
  • One key can produce a chain of keys (e.g. to automate accents or email addresses)
• Dynamic macros
  • Record
    • Press KC::DynMacRecord
    • Then another key which will be used to create an entry in the macro dictionary
    • Now all pressed key are recorded with its modifiers
    • Press KC::DynMacRecord again to end up the record
  • Launch
    • Press KC::DynMacGo
    • Then the key which was used to record the macro

Layout

Here's my current layout which uses the US international extended keymap.
The letter positions come from Ergo-L which is my favourite French layout.

Leader-key

Combination	Printed
F + L	flinguenheld
M + A	[email protected]
M + S	[email protected]
H + T	https://
D + O + T	https://github.com/flinguenheld/dotfiles
N + I + X	sudo nixos-rebuild switch --flake .#flopc
D + I + A	ø
D + E + G	°
C + O + P	©
R + E + G	®
B + E + T	ß
P + I + L	¶
M + U + L	×
D + I + V	÷
E + X + 1	¹
E + X + 2	²
E + X + 3	³
1 + 4	¼
1 + 2	½
3 + 4	¾

Flash

Clone this repo:

  git clone https://github.com/flinguenheld/rustychew

Then, hold down the controller's boot button and plug in the usb cable.
Mount the controller's drive and use one of these commands:

💡 Use the feature "zero" to flash the RP2040-zero (its led is wired GRB).

Mono

  cargo run --release --bin mono
  cargo run --release --bin mono --features zero

Split with the 0xCB-Gemini controller

This controller has a vbus detection that allows the keyboard to know which side is connected to the computer.
Therefore once you have flashed both sides with the split command, you'll be able to use any of them as master.

  cargo run --release --bin split

Split with the RP2040-Zéro controller

For this one, the position of the master is fixed, you have to make your choice and flash both side with one of these commands:

  cargo run --release --bin split --features master,zero

  cargo run --release --bin split --features slave,zero

Serial

To do some tests and print text throught the usb port, you can compile with the feature serial:
Then check the usb events to know which tty is used.

    sudo udevadm monitor

And connect to it (for instance with minicom or picocom. Ctrl-A X to exit )

    sudo minicom --device /dev/ttyACM0
    sudo picocom /dev/ttyACM0 -b 115200

Thanks

Rusty Chew uses the usbd-human-interface-device crate which simplifies the usb management ❤️.
Also the pio-uart which allowed me to create a UART half-duplex protocol.
And the rp-hal-boards that I used as a base to use the RP2040-zero controller.