Rust: esp32c3 RGB LED example

This example for the esp32c3 uses esp-idf and the RMT peripheral to drive the WS2812 RGB LED that's mounted on the respective dev boards (e.g. ESP32-C3-DevKitM-1).

Demo video

The project is based on ivmarkov/rust-esp32-std-hello. The implementation of LedStrip (using the RMT peripheral through esp-idf to drive the LED) is inspired by the respective implementation in esp-idf.

Preparation

• Install the nightly toolchain of Rust (necessary, because we utilize a few unstable Cargo features): rustup toolchain install nightly
• Make sure the toolchains are up to date, as one of the utilized unstable Cargo features landed just a few months ago: rustup update
• Switch to nightly (as per above, necessary for Cargo): rustup override set nightly
• The build is using the ldproxy linker wrapper from embuild, so install ldproxy:
  • cargo install ldproxy
• For flashing and monitoring execution, I recommend espflash and espmonitor crates:
  • cargo install espflash espmonitor

Build & Run

Simply build the project using cargo:

cargo build

Next, flash it (you might have to replace /dev/ttyUSB0 with your respective port):

espflash /dev/ttyUSB0 target/riscv32imc-esp-espidf/debug/esp32c3-idf-led-example

If you want to see the output of the program:

espmonitor --speed 115200 /dev/ttyUSB0