kronsyc/ws2812-esp32-rmt-driver

WS2812 driver using ESP32 RMT for Rust

ws2812-esp32-rmt-driver

A rust driver library to control WS2812B (NeoPixel) RGB LED pixels/strips using ESP32 RMT (Remote Control) module.

By disabling the carrier generator of the RMT's transmitter , it can be used as just a PWM signal generator for WS2812B data signal. This control way is the same as major Arduino/C++ library such as FastLED, Adafruit_NeoPixel.

The RMT (Remote Control) module is specific to ESP32. Hence, it can be used only for ESP32 SoC.

This library also support SK6812-RGBW 4-color LED pixels/strips (smart-leds API only).

Usage

Install rust with Xtensa support. Refer esp-rs/rust-build for the setup instruction.

Add following dependency to your Cargo.toml. Note that version is stripped in this example but it is recommended to specify version explicitly in your project.

[dependencies]
esp-idf-sys = { version = "*", features = ["binstart"] }
esp-idf-hal = "*"
smart-leds = "*"

ws2812-esp32-rmt-driver = { version = "*", features = ["smart-leds-trait"] }

[build-dependencies]
embuild = "*"
anyhow = "1"

Refer examples/ directory for the source code.

Make ensure esp toolchain is available and xtensa-esp32-elf-clang is in your $PATH. And then, run as follows

$ cargo build
$ cargo espflash

Features

• features = ["embedded-graphics-core"] to enable embedded-graphics API ws2812_esp32_rmt_driver::lib_embedded_graphics.
• features = ["smart-leds-trait"] to enable smart-leds API ws2812_esp32_rmt_driver::lib_smart_leds.
• default feature to enable just only driver API.

Development

To run the test locally, specify the local toolchain (stable, nightly, etc...) and target explicitly and disable example builds (specify --lib) .

$ cargo +stable test --target x86_64-unknown-linux-gnu --lib