# Interrupt Exercises ## Exercise A: GPIO Interrupts Configure the existing GPIO input button example to use **interrupts** instead of polling. - Check the `esp-hal` abstractions and code examples - See if you can find examples that you can adapt - Apply the mental model: find the **Instantiate**, **Configure**, and **Control** steps for interrupt-driven GPIO --- ## Exercise B: I/O Expander Interrupt The TCA6424 I/O expander has an **INT** output connected to a Xiao GPIO pin. Use it to get notified of input changes instead of polling over I2C. - Configure a GPIO interrupt on the INT pin - When triggered, read the I/O expander over I2C to determine what changed - This combines GPIO interrupts with I2C communication
The Embedded Rustacean ยท Rust Week 2026
The Embedded Rustacean ยท Rust Week 2026
The Embedded Rustacean ยท Rust Week 2026