sat-rs/satrs-example-stm32f3-disco

sat-rs example for the STM32F3-Discovery board

This example application shows how the sat-rs framework can be used on an embedded target. It also shows how a relatively simple OBSW could be built when no standard runtime is available. It uses RTIC as the concurrency framework.

The STM32F3-Discovery device was picked because it is a cheap Cortex-M4 based device which is also used by the Rust Embedded Book and the Rust Discovery book as an introduction to embedded Rust.

Preparing Rust and the repository

Building an application requires the thumbv7em-none-eabihf cross-compiler toolchain. If you have not installed it yet, you can do so with

rustup target add thumbv7em-none-eabihf

A default .cargo config file is provided for this project, but needs to be copied to have the correct name. This is so that the config file can be updated or edited for custom needs without being tracked by git.

cp def_config.toml config.toml

The configuration file will also set the target so it does not always have to be specified with the --target argument.

Building

After that, assuming that you have a .cargo/config.toml setting the correct build target, you can simply build the application with

cargo build

Flashing and Debugging from the command line

TODO

Debugging with VS Code

The STM32F3-Discovery comes with an on-board ST-Link so all that is required to flash and debug the board is a Mini-USB cable. The code in this repository was debugged using openocd and the VS Code Cortex-Debug plugin.

Some sample configuration files for VS Code were provided as well. You can simply use Run and Debug to automatically rebuild and flash your application.

The tasks.json and launch.json files are generic and you can use them immediately by opening the folder in VS code or adding it to a workspace.

If you would like to use a custom GDB application, you can specify the gdb binary in the following configuration variables in your settings.json:

• "cortex-debug.gdbPath"
• "cortex-debug.gdbPath.linux"
• "cortex-debug.gdbPath.windows"
• "cortex-debug.gdbPath.osx"

Commanding with Python

When the SW is running on the Discovery board, you can command the MCU via a serial interface, using COBS encoded CCSDS packets.

TODO:

• How and where to connect serial interface on the MCU
• How to set up Python venv (or at least strongly recommend it) and install deps
• How to copy def_tmtc_conf.json to tmtc_conf.json and adapt it for custom serial port