On microcontroller systems like the STM32, interrupts are even more important, as this is what allows an MCU to respond in hard real-time to an (external) event.

The STM32 family benefits from the Cortex-M3’s many new architectural enhancements including the Thumb-2 instruction set to deliver improved performance combined with better code density, and a ...

The STM32 CPU can easily interrupt with a pin changes, so that’s what I wanted. The Catch The problem is, of course, that mechanical switches bounce.