The Rust Programmable Keyboard Firmware Builder

RPK is a set of rust crates to build and configure hobbyist mechanical keyboard firmware. It differentiates itself form other firmware builders—such as QMK—by the way the keyboard is configured. Instead of fixed numbers of layers and macros with an assigned action to each row/column RPK uses the configuration model of keyd which allows for many more layers and macros.

The current features of RPK include:

• Text file configuration which can be uploaded instantly via the rpk-config companion program (no need to re-flash firmware).
• 256 low cost layers (first 32 can be composite).
• 4096 macros.
• Sensible key overloading, oneshot layers and changeable base layout.
• Modifiers are layers.
• Mouse support with changeable acceleration profiles.
• n-key rollover, consumer and sys ctl keycode support.
• Unicode support.
• Ring file system for storing multiple configurations.
• Clear, reset, bootloader actions and reset on panic.
• Low latency debounce logic.
• Low overhead firmware - uses rust embassy async embedded framework.