Rust Firmware for the Ferris keyboard

This firmware written in Rust is targetted for the Ferris keyboard built with a STM32F072 MCU and a MCP23017 IO expander.

It is based on the Keyberon library.

Features

• Multi layers keymaps
• Multiple keymaps
• Different Ferris models
• Hold Tap actions

What's missing

• No support for controlling the mouse
• No RGB (support is in keyberon but not implemented here)
• Sequences
• One Shot Actions
• ...

Installing the needed tools

Considering one has rust installed by rustup.rs, then one has to run the following commands:

cargo install cargo-binutils
rustup component add llvm-tools-preview

Compile & Flashing

The name of the model to flash is set a cargo feature. The possible names are:

• bling
• compact
• mini
• high

The possible keymaps are:

• keymap_basic
• keymap_borisfaure
• keymap_pierrec83

Some of them were converted with help from the tool qmk-layout-to-keyberon.

In order to generate and install the firmware for the mini model and the keymap keymap_basic:

cargo objcopy --release --no-default-features --features="mini,keymap_basic" -- -O binary ferris-firmware.bin
dfu-util -d 0483:DF11 -a 0 -s 0x08000000:leave -D ferris-firmware.bin