therustybits/zero-to-async

Building a basic async runtime from scratch in embedded Rust

Zero to Async

This is the companion repository for the YouTube video, where we walk through the creation of a basic async runtime in embedded Rust from the ground up. The code for the end of each chapter is in its respective directory.

Is it perfect? No! But some parts of it might be helpful to those (ok, me) trying to learn about async/await or using Rust in embedded systems.

My apologies to Ferris for the use of unsafe in a few places: some were avoidable (PAC access via raw pointer), while others were not (no-std Waker/RawWaker stuff).

Prerequisites

A burning desire to learn new things? And watching the two videos leading up to this one, of course, which cover:

• How to get setup for embedded development in Rust
• Blinking an LED & the embedded Rust ecosystem

Also: reading the Rust book is always a good idea

Further Research

Can't get enough async embedded Rust? Then I'd encourage you to check out:

• embassy
• Dario Nieuwenhuis' 2024 RustNL talk introducing embassy
• lilos
• Cliff Biffle's 2023 OSFC talk introducing lilos
• Cliff's blog

If you're looking for a similar bottom-up exploration of async Rust but this time using the standard library, check out the book "Asynchronous Programming in Rust" by Carl Fredrik Samson.

Any discussion of async Rust would be incomplete without mentioning without.boats blog, which is full of great articles about the history of async/await within the Rust project, async topics like Pinning, and possible future directions for async.