CH32V003 Blinky in Rust

I could not find a small and simple blinky example for CH32V003 and probe-rs, so here it is!

Hardware

I used CH32V003F4P6-EVT-R0 and WCH-LinkE. The project is set up for CH32V003F4P6 but should work with any other CH32V chip as well, just change it in Cargo.toml and .cargo/config.toml. The WCH-Link is detected automatically by probe-rs.

Connections

On CH32V003F4P6-EVT-R0, connect PD6 to LED1.

Between CH32V003F4P6-EVT-R0 and WCH-LinkE, connect:

VCC to 3V3
GND to GND
PD1 to SWDIO/TMS

Running

1. Install Rust and probe-rs. Recommend installing version 0.26.0 of probe-rs-tools as the latest version has a bug (probe-rs/probe-rs#3455). If installing the binary in Linux, use https://github.com/probe-rs/probe-rs/releases/download/v0.26.0/probe-rs-tools-installer.sh, or for installing from source:

cargo install probe-rs-tools --version 0.26.0

2. Set up project to use Rust Nightly

cd ch32v003-blinky-rust
rustup install nightly
rustup override set nightly

3. Install std sources

rustup component add rust-src

4. Connect board and run with

cargo run

or to run with the cargo-embed environment installed with probe-rs:

cargo embed

5. To open a debug environment in VSCode, add this to a launch.json file:

{
    "type": "probe-rs-debug",
    "request": "launch",
    "name": "probe-rs ch32",
    "cwd": "${workspaceFolder}",
    "connectUnderReset": false,
    "chip": "CH32V003",
    "flashingConfig": {
        "flashingEnabled": true,
        "haltAfterReset": true
    },
    "probe": "1a86:8010",
    "coreConfigs": [
        {
            "coreIndex": 0,
            "programBinary": "./target/riscv32ec-unknown-none-elf/debug/${workspaceFolderBasename}"
        }
    ]
}

Acknowledgements

This was based on the examples project in ch32-hal. You can find the original code here:

https://github.com/ch32-rs/ch32-hal/tree/main/examples/ch32v003