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Setting up ESP32 environment based on Rust

#rust#embedded#esp32237
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To develop Rust applications for ESP32, you need to install Rust, switch to nightly version, and install ESP32 tools. There are two ways to develop with Rust: using std library or core library (no_std) for bare-metal development. Tools like ldproxy, espflash, and espmonitor are necessary for building and flashing applications. For RISC-V targets like ESP32-C2 and ESP32-C3, you need to set up the toolchain, add targets, create new projects using templates, configure projects, and run them. Hardware can be checked, and simulation can be done using wokwi. Additional resources include tutorials and documentation for ESP32 development boards.

Installing Rust#

Refer to Rust Installation/Update/Packaging

Switching Rust to nightly#

rustup install nightly
rustup default nightly

Installing ESP32 Tools#

There are two ways to develop ESP32 with Rust:

  • Develop using the std library
  • Develop using the core library (no_std) for bare-metal development

ldproxy#

This must be installed when building applications using the Rust standard library std

cargo install ldproxy

espflash#

Tool for flashing ESP devices

# cargo-espflash is used for cross-compiling and flashing
cargo install cargo-espflash
cargo install espflash

espmonitor#

Serial monitor for esp32 and esp8266

# cargo-espmonitor is used for serial monitoring of esp32 and esp8266
cargo install cargo-espmonitor
cargo install espmonitor

Only for RISC-V targets#

To build Rust applications for Espressif chips based on the RISC-V architecture, follow these steps:

  1. Install the nightly toolchain and rust-src component
rustup toolchain install nightly --component rust-src
rustup default nightly
  1. Set the target
  • For no_std bare-metal applications, run
# For ESP32-C2 and ESP32-C3
rustup target add riscv32imc-unknown-none-elf
# For ESP32-C6 and ESP32-M2
rustup target add riscv32imac-unknown-none-elf

Creating a New Project#

Install cargo-generate:

cargo install cargo-generate

Once the above tools are installed, you can use the corresponding templates to generate projects. There are two templates available:

  1. esp-template - Bare-metal no_std project template
  2. esp-idf-template - Template with std support

You can clone both templates to your local machine so that you don't have to download them from GitHub in the future:

mkdir ~/.espressif
cd ~/.espressif
git clone https://github.com/esp-rs/esp-template
git clone https://github.com/esp-rs/esp-idf-template.git

Then, create a project based on a template. For example, create a project using the esp-idf-template:

cargo generate ~/.espressif/esp-idf-template/

create espidf project

Configuring the Project#

Open .cargo/config.toml and add the following lines to the bottom of the [env] section. Keep the rest of the content unchanged.

cd xxx
vi .cargo/config.toml

[env]
ESP_IDF_TOOLS_INSTALL_DIR = { value = "global" }

Running the Project#

# Cross-compile the project
cargo build --release
# Cross-compile and run the project
cargo run --release

cargo run

Checking Hardware#

If you encounter any issues, refer to Checking Hardware

Simulation#

Official Website#

https://wokwi.com/, wokwi is a web-based online simulation platform.

To write code locally, you can install the web simulation:

cargo install wokwi-server
  1. Create a new project
  2. Take note of the id of the web URL

image

  1. Then, locally enter
# Compile
cargo build --release
# Run
wokwi-server -c esp32c3 -i 网页端的id target/riscv32imac-esp-espidf/release/espidf-demo

Tutorials#

References#

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