SAMWISE Flight Computer Code

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

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

Getting Started

Pre-requisites

1. Install bazelisk by following instructions for your platform here: https://github.com/bazelbuild/bazelisk.

   • You can also use bazel, but this is not recommended.

2. Pull necessary submodules using:

git submodule update --init --recursive

Historically, see the onboarding doc for development environment setup (pre-bazel).

Building

To build the code in this repo, run bazel build :samwise --config=picubed-debug.

You can use the pre-provided scripts, source build_tests.sh and source build_debug.sh, to run automatically. NOTE: These automatically delete the build_tests and build directories respectively before running, so run with caution!

The following configuration options are available:

• pico: pico exectuable
• picubed-debug: picubed executable, for debugging
• picubed-flight: picubed executable, for flight
• picubed-bringup: picubed executable, for bringing up the board (these can be configured in .bazelrc)

Build Archives

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