PicoCalc OS (Rust)

A simple operating system for the Clockwork PicoCalc, written in Rust.
This project provides a minimal kernel, ABI, and user-space applications to experiment with OS development on constrained hardware.

Status

Basic synchronous applications are working great.
Current focus is on expanding the ABI syscalls and fixing the MSC/USB-SCSI driver to make application development easier and smoother.

Project Structure

• kernel/ – The core OS kernel (task scheduling, drivers, memory, etc.)
• abi_sys/ – Shared application binary interface definitions for kernel ↔ userspace (Repr "C")
• abi/ – Rust focused ABI helpers and abstractions for easier development
• user-apps/ – Collection of userspace programs (calculator, snake, etc.)

Features

• Minimal Rust-based kernel targeting the PicoCalc
• Custom ABI for safe communication between kernel and applications
• Support for multiple user-space applications
• Hardware drivers tailored for the PicoCalc

Getting Started

git clone https://github.com/LegitCamper/picocalc-os-rs.git
cd picocalc-os-rs
just userapps
# copy the build applications from target/thumbv8m.main-none-eabihf/release-binary/application to the sdcard and rename them to app.bin
just kernel-release # keep in mind that https://github.com/StripedMonkey/elf2uf2-rs version is required until https://github.com/JoNil/elf2uf2-rs/pull/41 is merged