Sigmar Keyboard

40% split keyboard design

PCB

The design for the PCB was done in KiCad. The PCB is designed according to the specifications of manufacturing with JLCPCB.

Firmware

Prerequisites:

Podman
dfu-programmer

Building:

make docker to build the container image
make to build the bootloader and firmware hex files

Flashing:

make flash left or make flash right

Building and flashing in WSL

Install Ubuntu >= 22.04
Install usbipd-win
sudo apt install dfu-programmer podman

Flashing:

In Powershell
- usbipd list
  - Find the entry that corresponds with the keyboard (when in keyboard mode, VID/PID is f055:5164)
- Press the reset button to switch to flashing mode
  - You will need another keyboard or the on-screen virtual keyboard from now on! If the latter, it might help to type the following commands beforehand, so you only need to press enter.
- usbipd wsl attach --busid=#-##
In WSL
- make flash-left or make flash-right

Flashing the bootloader with Arduino ISP

Connect Arduino ISP
- MOSI Pin 11 (programmer) -> B2 (target)
- MISO Pin 12 -> B3
- SCK Pin 13 -> B1
- RST Pin 10 -> RST
make build/sigmar_[osx|windows]_bootloader.hex
avrdude -p atmega32u4 -F -P COM4 -c stk500v1 -b 19200 -U flash:w:build/sigmar_[osx|windows]_bootloader.hex
- -P COM4 should match the serial port for the Arduino ISP