This is a no_std application targeting Espressif's ESP32 (Xtensa).
It was generated using this template:
$ cargo generate https://github.com/esp-rs/esp-templateBrian Schwind from tonari has written a decent primer on hardware projects with Rust, detailing how it went for them and referencing the great work that the embedded devices working group is doing to support Rust on embedded hardware.
Scott Mabin from Espressif gave an excellent introduction to embedded Rust and async.
We are using an ESP32 (Xtensa, no S variant) chip with the current module on https://github.com/das-labor/badge-2021.
Follow the toolchain installation instruction from the esp-rs book.
Install cargo-espflash.
To build, flash and monitor the app, run make flash.
Check out the Embedded Rust Book and have a look at Ferrous Systems' book on Rust for Espressif chips.
You may design a different pin compatible SoM for the badge, e.g., based on the ESP32-C3.
See https://github.com/shanemmattner/ESP32-C3_Rust_Tutorials for concrete examples.
MIT license (LICENSE or http://opensource.org/licenses/MIT)