An example project demonstrating integration with Rust for the ESP32-S2 and ESP32-C3 microcontrollers.
This example starts a FreeRTOS task to call a function in Rust and display the results in C.
First, install the ESP-IDF SDK as shown in the Get Started guides. For best support of the ESP32-C3, install the SDK from the master branch.
To support the Xtensa instruction set, build and install custom LLVM and Rust toolchains as shown in the Rust On Xtensa guide.
Install the RISCV target for Rust:
rustup target add riscv32i-unknown-none-elf
This will eventually be folded into the main CMake build, but for now, build the library separately.
To build the Rust library, run:
cd rustlib
xargo build --release
cd ..
Build with manual configuration of the target:
export RUSTC=/usr/local/xtensa/rust/bin/rustc
export XARGO_RUST_SRC=/usr/local/xtensa/rust/library
cd rustlib
xargo build --release --target=xtensa-esp32-none-elf
cd ..
To build the Rust library, run:
cd rustlib
cargo build --release
cd ..
Build with manual configuration of the target:
unset RUSTC
unset XARGO_RUST_SRC
cd rustlib
cargo build --release --target=riscv32i-unknown-none-elf
cd ..
First ensure that the environment variables for the ESP32 SDK are properly set up. If you have followed the instructions in the Getting Started guide, activate the environment with the get_idf
alias:
get_idf
Next, configure the project for the desired MCU.
For the ESP32:
idf.py set-target esp32
idf.py menuconfig
For the ESP32-S2:
idf.py set-target esp32s2
idf.py menuconfig
For the ESP32-C3:
idf.py set-target esp32c3
idf.py menuconfig
Build the project by running:
idf.py build
Flash the compiled binary by running:
idf.py -p /dev/cu.SLAB_USBtoUART flash
Connect to the UART over USB port to monitor the application console:
idf.py -p /dev/cu.SLABtoUART monitor
To exit the monitor, press Ctrl-]
.
openocd -f board/esp32-wrover-kit-3.3v.cfg