Button Debounce

What is it?

Button Debounce is a library to handle contact bounce in your microcontroller system circuit. It build with event driven architecture, non-blocking execution, only standard C, platform and hardware independent. And I hope you'd enjoy it.
I also write up about this library on Slime Systems, be sure to check it out.

How to use this?

Just include the header to your project.

#include "button_debounce.h"

Declaring what to do when the button press has been detected.

// For example toggle an LED
void led_toggle() {
  // toggle an LED on pin B5
  ChgBit(GPIOB->ODR, 5);
}

Setup an object instance.

const ButtonDebounce_Config button_c3_debounce_config = {
    .fell = &led_toggle, // point to the function we just declared

    // depend on the circuit and intentions
    // you might want to use .rose instead of .fell
    // which detects different edge transitions
};
static ButtonDebounce_State button_c3_debounce_state;

// somewhere in main()
button_debounce__init(&button_c3_debounce_state);

And keep sample the signal from the main loop.

  for (;;) {
    button_debounce__sample(
      &button_c3_debounce_config,
      &button_c3_debounce_state,
      ValBit(GPIOC->IDR, 3)
    );
  }

See the whole project including Makefile and build instructions at https://github.com/midnight-wonderer/button-debounce-example

License

Button Debounce is released under the BSD 3-Clause License. 🎉