An embedded-hal implementation for Rust on ESP32 and ESP-IDF

• This crate is intended for usage in ESP32 embedded projects that utilize and link with the ESP-IDF SDK.
• For embedded projects that don't need Rust STD support, WiFi or BLE (and thus don't link with the ESP-IDF SDK), please check esp32-hal.

For more information, check out:

• The Rust for Xtensa toolchain
• The Rust-with-STD demo
• The esp-idf-svc project
• The embedded-hal project
• The esp32-hal project

Hardware Notes

Each chip has a number of GPIO pins which are generally used by the SPI0 and SPI1 peripherals in order to connect external PSRAM and/or SPI Flash memory. The datasheets explicitly state that these are not recommended for use, however this crate includes them anyways for completeness.

Please refer to the table below to determine the pins which are not recommended for use for your chip.

Chip	GPIOs
ESP32	6 - 11, 16 - 17
ESP32-C3	12 - 17
ESP32-S2	26 - 32
ESP32-S3	26 - 32, 33 - 37*

* When using Octal Flash and/or Octal PSRAM

Examples

The examples could be built and flashed conveniently with cargo-espflash. To run ledc-simple on an ESP32-C3:

$ cargo espflash --release --target riscv32imc-esp-espidf --example ledc-simple --monitor /dev/ttyUSB0

In order to run the examples on other chips you will most likely need to adapt at least the used pins.