SAMWISE Flight Computer Code

Flight computer firmware for the SAMWISE 2U cubesat. Designed for the Raspberry Pi RP2040 and RP2350 microcontrollers.

Getting Started

See the onboarding doc for development environment setup. To set some useful configurations for this repo, run configure.sh.

Design Objectives

Beyond functional parity with the prior CircuitPython-based Sapling firmware, this project has a few additional goals:

• Reliable OTAs
• Use the blackboard pattern
• Eliminate heap allocations
• Simple flight/debug configuration
• Clean code

Building

To build the code in this repo, enter the build folder with cd build (if you do not have one), and then run cmake .. followed by make -j8.

The following targets will be built:

• samwise_pico_debug: pico exectuable
• samwise_picubed_debug: picubed executable, for debugging
• samwise_picubed_flight: picubed executable, for flight
• samwise_picubed_bringup: picubed executable, for bringing up the board (these can be configured in CMakeLists.txt)

Build Archives

The C Build github action automatically builds RP2040 and RP2350 archives on pushes to pull requests into main.

Switching build targets

To switch between builds for the RP2040 (Pico 1) and RP2350 (Pico 2 and Pycubed), set the RP2350 flag to 1 when calling cmake. For example, to build for the RP2350, run:

cmake .. -DRP2350=1

Note that when switching between the RP2040 and RP2350, it is usually necessary to clear the cmake cache (by running rm -rf build/*)