Basically, this is an implementation for a cooking timer, where an encoder is used to set desired minutes and an internal counter waits this given time, until an alarm is displayed.
More technically, this is a Rust embedded project that deals with a 16x2 character LCD, an encoder (handled with external interrupts) and a timer interrupt that dictate system events. A simple state machine goes through an initial splash screen, then the counter setup, the actual countdown and finally the alarm.
Required target is thumbv7em-none-eabihf, nightly. It is automatically set up thourgh rust-toolchain.toml.
cargo install cargo-embedProject can be build with cargo build, or build and uploaded with cargo embed.
Serial RTT channels can be opened with cargo embed --config with_rtt. Note that somehow it does not work on Clion terminals.
Breakpoint debug can be achieved with a VSCode plugin, probe-rs-debugger.
Install it with:
# VSC plugin (check for new releases here: https://github.com/probe-rs/vscode/releases)
wget https://github.com/probe-rs/vscode/releases/download/v0.4.0/probe-rs-debugger-0.4.0.vsix
code --install-extension probe-rs-debugger-0.3.3.vsix
# debugger server
cargo install --force --git https://github.com/probe-rs/probe-rs probe-rs-debuggerThe target board can be then debugged through VSCode, thanks to .vscode/launch.json file.
Further details on how to edit this file can be found in the official documentation.
Base project configuration for STM32F7x7 boards can be obtained from rust-embedded/cortex-m-quickstart template:
cargo generate rust-embedded/cortex-m-quickstartMain references used to achive this project:
- cortex-m-quickstart starting template.
- Cargo-embed documentation for upload and serial debug.
memory.xfiles from https://github.com/stm32-rs/stm32f7xx-hal.- stm32f7xx-hal examples
- rtt_target Crate: target side implementation of the Real-Time Transfer I/O protocol.
- probe-rs-debugger plugin for VS-Code