Awesome
RMK
A feature-rich Rust keyboard firmware.
Features
- Support a wide range of microcontrollers: Powered by embassy, RMK supports a wide range of microcontrollers, such as stm32/nRF/rp2040/esp32
- Real-time keymap editing: RMK has built-in vial support, the keymap can be changed on-the-fly
- Advanced keyboard features: Many advanced keyboard features are available by default in RMK, such as layer switch, media control, system control, mouse control, etc
- Wireless: BLE wireless support with auto-reconnection/multiple devices feature for nRF52 and esp32 microcontrollers, tested on nRF52840, esp32c3 and esp32s3
- Easy configuration: RMK provides a simple way to build your keyboard: a
keyboard.toml
is all you need! For experienced Rust user, you can still customize your firmware easily using RMK - Low latency and low-power ready: RMK has a typical 2 ms latency in wired mode and 10 ms latency in wireless mode. By enabling
async_matrix
feature, RMK has very low power consumption, with a 2000mah battery, RMK can provide several months battery life
User Documentation | API Reference | FAQs | Changelog
</details>Real World Examples
rmk-ble-keyboard
<img src="https://github.com/HaoboGu/rmk/blob/main/docs/src/images/rmk_ble_keyboard.jpg?raw=true" width="60%">Usage
Option 1: Initialize from template
You can use rmk-template to initialize your project.
cargo install cargo-generate
cargo generate --git https://github.com/HaoboGu/rmk-template
Then follow the steps in generated README.md
. Check RMK's User Guide for details.
Option 2: Try built-in examples
Example can be found at examples
. The following is a simple
step-to-step instruction for rp2040. For other microcontrollers, the steps should be identical with a debug probe.
rp2040
-
Install probe-rs
cargo install probe-rs --features cli
-
Build the firmware
cd examples/use_rust/rp2040 cargo build
-
Flash using debug probe
If you have a debug probe connected to your rp2040 board, flashing is quite simple: run the following command to automatically compile and flash RMK firmware to the board:
cd examples/use_rust/rp2040 cargo run
-
(Optional) Flash using USB
If you don't have a debug probe, you can use
elf2uf2-rs
to flash your firmware via USB. There are several additional steps you have to do:- Install
elf2uf2-rs
:cargo install elf2uf2-rs
- Update
examples/use_rust/rp2040/.cargo/config.toml
, useelf2uf2
as the flashing tool- runner = "probe-rs run --chip RP2040" + runner = "elf2uf2-rs -d"
- Connect your rp2040 board holding the BOOTSEL key, ensure that rp's USB drive appears
- Flash
Then, you will see logs like if everything goes right:cd examples/use_rust/rp2040 cargo run
Finished release [optimized + debuginfo] target(s) in 0.21s Running `elf2uf2-rs -d 'target\thumbv6m-none-eabi\release\rmk-rp2040'` Found pico uf2 disk G:\ Transfering program to pico 173.00 KB / 173.00 KB [=======================] 100.00 % 193.64 KB/s
- Install
Roadmap
Current roadmap of RMK can be found here.
Minimum Supported Rust Version (MSRV)
This crate uses latest stable. Other versions should work, but they're not tested.
License
RMK is licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.