Firmware for Anne Pro Keyboard written in Rust

This is an alternative firmware for the Anne Pro Keyboard, with the goal of being more stable than the original firmware and adding extra features.

Status

This project is still under heavy development and probably not quite ready yet to serve as your only keyboard.

Working today:

• Basic keyboard functionality
• Bluetooth (as a keyboard)
• LED control (switching on/off, changing themes)
• USB charging
• Drop in replacement as a simple firmware update
• Partial bluetooth communication with the Anne Pro App (tested with Anne Pro Mac App)

Not yet implemented:

• USB (sends keys concurrently with BT, hangs on connect/disconnect)
• Media controls / special keys
• Uploading custom lighting settings
• Uploading custom keymaps
• Power Management
• BT setup mode with LEDs etc.

Community

We hang out in the Anne Pro Dev discord. Please observe the Rust Code of Conduct within our community.

Flashing

You can find the latest build on the Releases page. Download anne-key.dfu. If LEDs aren't working with latest build, you can try build 209 , or the following procedure: reboot into DFU mode by holding down Fn+Space+Esc, then exit with Esc.

Then you can either follow the obins firmware update steps (click Update manual) or use dfu-util.

dfu-util

First you'll need to install dfu-util.

To flash your Anne Pro connect via USB, then hold down the Esc button, press the little reset switch on the back and finally release Esc.

Now your keyboard is in DfuSe mode. It should show up in dfu-util:

$ dfu-util -l
dfu-util 0.9

...

Found DFU: [0483:df11] ver=0200, devnum=23, cfg=1, intf=0, path="20-2", alt=2, name="@BluetoothFlash  /0x1c000000/14*256 a,192*256 g", serial="057C37553731"
Found DFU: [0483:df11] ver=0200, devnum=23, cfg=1, intf=0, path="20-2", alt=1, name="@Internal Flash  /0x0c000000/64*256 a,192*256 g", serial="057C37553731"
Found DFU: [0483:df11] ver=0200, devnum=23, cfg=1, intf=0, path="20-2", alt=0, name="@Internal Flash  /0x08000000/64*256 a,192*256 g", serial="057C37553731"

Then you can flash your keyboard firmware:

$ dfu-util --alt 0 --intf 0 --download anne-key.dfu

...

file contains 1 DFU images
parsing DFU image 1
image for alternate setting 0, (1 elements, total size = 5104)
parsing element 1, address = 0x08004000, size = 5096
Download        [=========================] 100%         5096 bytes
Download done.
done parsing DfuSe file

And that's it. Press the reset button again to exit the bootloader and return to normal keyboard mode and you're done!

If your keyboard is running our firmware, you can reboot to DFU mode by holding down Fn+Space+Escape.

If you want to return to the original firmware you can flash the original firmware with:

$ dfu-util --alt 0 --intf 0 --download "anne pro key 1.4.dfu"

Documentation & Hacking

You can find some documentation on hardware on GitBooks. Many fellow projects provide insights into the obins firmware and app protocol:

1. Reverse-engineering

• hi-a's disassembly of the firmware and bootloader (repo)
• metr1xx's APK reverse engineering

2. Alternate control apps

• Blucky87's Python CLI
• fcoury's Node.js library and electron app
• kprinssu's Windows app
• msvisser's Mac App

3. Alternate firmware

• qmk ports: josecostamartins' and dwhinham's

To build your own firmware, you need the nightly-2018-05-15 rust toolchain with the following components:

• nightly rust as default: rustup override set nightly-2018-05-15 within your checkout
• thumbv7m std: rustup target add thumbv7m-none-eabi
• ARM linker: usually named arm-none-eabi-ld, please check with your OS

Then, make dfu in the top directory will build your anne-key.dfu.

To analyze the firmware's code size, you need cargo-bloat:

• cargo install cargo-bloat
• make bloat
• make bloat BLOAT_ARGS="--crates" # passing arguments to cargo-bloat

Our CI requires consistent formatting, please run rustfmt before you submit PRs:

• rustup component add rustfmt-preview
• make fmt

Troubleshooting

error[E0463]: can't find crate for compiler_builtins

Run the following command before running make dfu:

rustup target add thumbv7m-none-eabi

error: linker arm-none-eabi-ld not found

You need to install the ARM tools. If you're on macOS run the following:

brew install caskroom/cask/gcc-arm-embedded