This project is a firmware for the Annex Engineering Crampon, an accelerometer resonance measuring device, written in Rust using the Anchor library to speak with Klipper.
It demonstrates how firmware can be rapidly developed for new sensors or new MCU targets using Anchor.
Crampon is a single device, and Rust firmware is more easily built on a desktop class PC using cross compilers, so a pre-built binary is provided for ease of use.
Checkout the repository and load your device using:
% git clone https://github.com/Annex-Engineering/crampon_anchor.git
% ./crampon_anchor/update.sh
After the update completes, the device should be available as:
/dev/serial/by-id/usb-Annex_Engineering_Crampon-if00.
Devices running an older build may have a serial number in the path.
Off: No Firmware or Bootloader Active
On: Firmware Active
Rapid Flashing: Firmware Active, ADXL Communication Failure
[mcu crampon]
serial: /dev/serial/by-id/usb-Annex_Engineering_Crampon-if00
[adxl345]
cs_pin: crampon:CS
[resonance_tester]
accel_chip: adxl345
probe_points: 90, 90, 20To compile the project, you will need a Rust toolchain installed, cargo-binutils, and the compile target for ARM Cortex-M4F. They can be installed with:
% rustup component add llvm-tools-preview
% rustup target add thumbv7em-none-eabihf
To build the project, and convert the executable to a .bin file, run:
% cargo build --release
% rust-objcopy target/thumbv7em-none-eabihf/release/crampon_anchor -O binary crampon.bin
To enter the bootloader and program the device, run:
% stty -F /dev/serial/by-id/usb-<DEVICEPATH> 1200
% sudo dfu-util -d ,0483:df11 -a 0 -D crampon.bin --dfuse-address 0x08000000:leave
After the update completes, the device should be available as:
/dev/serial/by-id/usb-Annex_Engineering_Crampon-if00.
To enable the serial number in the device path, simply enable the serialnumber cargo feature using the following command to build:
% cargo build --release --features serialnumber