README.md

WDT demo

This demo uses the watchdog timer (WDT) to show how the entire device can be set to automatically reset if certain conditions are not met within a certain period of time. In this case you have to press all 4 buttons at least once within a 5 second period to prevent a reset.

Can you spot an opportunity to crash the program?

If you mash the buttons as the time approaches zero you will encounter an 'attempt to subtract with overflow' panic at main.rs:205 which is ultimately cleared by the watchdog timer. This demonstrates the ability to recover from a panic. Use probe-run to see the actual panic message.

How to run

If using cargo-embed, just run

$ cargo embed --release --target=thumbv7em-none-eabihf