MultiButton

struct Button button1;

button_init(&button1, read_button_pin, 0, 0);

button_attach(&button1, SINGLE_CLICK, Callback_SINGLE_CLICK_Handler);
button_attach(&button1, DOUBLE_CLICK, Callback_DOUBLE_Click_Handler);
...

button_start(&button1);

while(1) {
    ...
    if(timer_ticks == 5) {
        timer_ticks = 0;

        button_ticks();
    }
}

struct Button {
	uint16_t ticks;
	uint8_t  repeat: 4;
	uint8_t  event : 4;
	uint8_t  state : 3;
	uint8_t  debounce_cnt : 3;
	uint8_t  active_level : 1;
	uint8_t  button_level : 1;
	uint8_t  button_id;
	uint8_t  (*hal_button_Level)(uint8_t  button_id_);
	BtnCallback  cb[number_of_event];
	struct Button* next;
};

#include "button.h"

unit8_t btn1_id = 0;

struct Button btn1;

uint8_t read_button_GPIO(uint8_t button_id)
{
	// you can share the GPIO read function with multiple Buttons
	switch(button_id)
	{
		case btn1_id:
			return HAL_GPIO_ReadPin(B1_GPIO_Port, B1_Pin);
			break;

		default:
			return 0;
			break;
	}
}
void BTN1_PRESS_DOWN_Handler(void* btn)
{
	//do something...
}

void BTN1_PRESS_UP_Handler(void* btn)
{
	//do something...
}

...

int main()
{
	button_init(&btn1, read_button_GPIO, 0, btn1_id);
	button_attach(&btn1, PRESS_DOWN,       BTN1_PRESS_DOWN_Handler);
	button_attach(&btn1, PRESS_UP,         BTN1_PRESS_UP_Handler);
	button_attach(&btn1, PRESS_REPEAT,     BTN1_PRESS_REPEAT_Handler);
	button_attach(&btn1, SINGLE_CLICK,     BTN1_SINGLE_Click_Handler);
	button_attach(&btn1, DOUBLE_CLICK,     BTN1_DOUBLE_Click_Handler);
	button_attach(&btn1, LONG_PRESS_START, BTN1_LONG_PRESS_START_Handler);
	button_attach(&btn1, LONG_PRESS_HOLD,  BTN1_LONG_PRESS_HOLD_Handler);
	button_start(&btn1);

	//make the timer invoking the button_ticks() interval 5ms.
	//This function is implemented by yourself.
	__timer_start(button_ticks, 0, 5);

	while(1)
	{}
}