Raspberry Pi Pico Rust 🦀 and async embedded USB development with embassy-rs.

Learn how to implement a vendor-specific USB device in Rust with ease.

In this episode I use Rust to develop an embedded USB vendor device on the Pico. This uses Rust's async and futures support, and provides a simple but complete example implementing control and bulk transfers, following a subset of the protocol used by the xum1541 project (part of OpenCBM).

This tutorial covers:
- Setting up a basic USB vendor device
- Implementing USB descriptors
- Handling static lifetimes
- Handling control and bulk transfers
- Using embassy's task executor
- A watchdog timer
- Mutexes
- Comparisons between the TinyUSB stack and embassy
- Lots of other stuff!

As well as the Pico (Rp2040 and RP2350) embassy supports the ESP32, STM32 and Nordic devices.

Timestamps:
00:00 Intro
02:37 Building, flashing and running
05:00 Modules
05:50 USB Descriptor and other setup
14:04 Control handling
20:52 Bulk handling
25:40 Protocol handling
29:49 Constants
30:32 Conclusions and wrap-up

The complete source code and documentation is available at:

This example is perfect for anyone wanting to:
- Learn USB device development with Rust
- Create custom USB peripherals with Rust
- Understand low-level USB communication
- Get started with the Raspberry Pi Pico with Rust

Prerequisites:
- Basic familiarity with Rust programming
- 2 x Raspberry Pi Picos (one for use as a debug probe)
- Development environment set up for Rust - although full instructions for building and flashing the example are in the project.

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Rocking Rust - Building a USB Vendor Device with embassy-rs and the Raspberry Pi Pico - Playing with the Pico ep2