The rust-analyzer plugin for VSCode provides you with a helpful little
▶ Run button above every test or
main() function that lets you execute your code right out of the editor.
Unfortunately though, this won't work out of the box in embedded projects, since rust-analyzer will invoke
cargo run when you click on
▶ Run, and cargo itself does not know how to flash and run applications on embedded targets.
However, Rust-Analyzer does seamlessly integrate with probe-run, a custom cargo runner for embedded development:
probe-run is a cargo runner and not a cargo subcommand, all we have to do is modify our settings to use
probe-run instead whenever
cargo run is called. After that, we can use the
▶ Run button like we would in a native project.
To show how to set this up, let's configure a project based on
cortex-m-quickstart, namely our beginner embedded training code examples.
First, make sure you've installed Rust-Analyzer and
$ cargo install probe-run
Then, we need to find out if our chip is supported. This also tells us which variant name to use in our configuration later.
$ probe-run --list-chips (..) STM32F107VB STM32F107VC nrf52 series Variants: nRF52810_xxAA nRF52811_xxAA nRF52832_xxAA nRF52832_xxAB nRF52840_xxAA nrf51 series (..)
Since we want to build our examples for the nRF52840 Development Kit, our variant of choice is
Now, in the
.cargo/config.toml file of our project, we can set
probe-run as the default
runner to be used when running executables built for our board.
[target.thumbv7em-none-eabi] runner = "probe-run --chip nRF52840_xxAA" # ^^^^^^^^^ ^^^^^^^^^^^^^ [build] target = "thumbv7em-none-eabi" # = ARM Cortex-M4
And that's it! Now you can use the Run button as usual:
Note that this now works for every file in your workspace, omitting the need for multiple custom VSCode tasks:
☝️ Note that we've just released
probe-run 0.1.2 which adds support for hard-float targets, so we can use
thumbv7em-none-eabihf too ✨
Sponsor this work
probe-run is a Knurling project and can be funded through GitHub sponsors. Sponsors get early access to
defmt and other tools we are building. Thank you to all of the people already sponsoring our work through the Knurling project!