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);
}
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);
.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)
);
}
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.