firmware

FFP Firmware

Requirements

• You must have a working Rust compiler installed. Visit rustup.rs to install Rust.

• Your Rust toolchain needs the thumbv6m-none-eabi target installed:

rustup target add thumbv6m-none-eabi

Building

Once Rust is installed, use Cargo to build:

cargo build --release

The resulting binary is an ELF file in target/thumbv6m-none-eabi/release/ffp_firmware which can be programmed via your usual programmer, or see below for generating a raw binary file and bootloading over USB.

Bootloading

You can reprogram the FFP using its built-in USB bootloader. You can use dfu-util or STM32CubeProg to perform the bootloading, both of which are available for Linux, MacOS, and Windows.

To generate a binary file suitable for bootloading with dfu-util:

cargo build --release
arm-none-eabi-objcopy -O binary -S target/thumbv6m-none-eabi/release/ffp_firmware ffp.bin

STM32CubeProg can load data directly from the ELF file, but only if it has a .elf extension. Simply copy the elf file:

cp target/thumbv6m-none-eabi/release/ffp_firmware ffp_firmware.elf

To put an already-programmed FFP device into bootload mode:

ffp bootload

Devices which have a totally erased flash will come up in bootloader mode automatically.

To bootload using dfu-util:

dfu-suffix -a ffp.bin -v 0483 -p df11
dfu-util -a 0 -s 0x08000000 -D ffp.bin

To bootload using STM32CubeProg, open the ffp_firmware.elf file made above, and download it to the FFP.

Reconnect the device after programming to load new firmware.

Licence

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.