/*
 * Copyright (c) 2016 Zibin Zheng <znbin@qq.com>
 * All rights reserved
 */

#ifndef _MULTI_BUTTON_H_
#define _MULTI_BUTTON_H_

//#include "stdint.h"
#include "string.h"
#include "define_all.h" 

//According to your need to modify the constants.
#define TICKS_INTERVAL    20	//ms
#define DEBOUNCE_TICKS    3	//MAX 8
#define SHORT_TICKS       (300 /TICKS_INTERVAL)
#define LONG_TICKS        (2000 /TICKS_INTERVAL)


typedef void (*BtnCallback)(void*);

typedef enum {
	PRESS_DOWN = 0,		//按下触发
	PRESS_UP,			//松开触发
	PRESS_REPEAT,		//按下repeat次触发
	SINGLE_CLICK,		//单击按键
	DOUBLE_CLICK,		//双击按键
	LONG_PRESS_START,	//长按到阈值
	LONG_PRESS_HOLD,	//长按期间一直触发
	number_of_event,
	NONE_PRESS
}PressEvent;

typedef struct Button {
	uint16_t ticks;
	uint8_t  repeat : 4;
	uint8_t  event : 4;//按键的事件
	uint8_t  state : 3;
	uint8_t  debounce_cnt : 3;
	uint8_t  active_level : 1;//有效的触发电平
	uint8_t  button_level : 1;
	uint8_t  (*hal_button_Level)(void);//GPIO电平读取接口的函数指针
	BtnCallback  cb[number_of_event];//声明一个BtnCallback函数指针类型的数组
	struct Button* next;//代表链表的结构体指针
}Button;

#ifdef __cplusplus
extern "C" {
#endif

void button_init(struct Button* handle, uint8_t(*pin_level)(), uint8_t active_level);
void button_attach(struct Button* handle, PressEvent event, BtnCallback cb);
PressEvent get_button_event(struct Button* handle);
int  button_start(struct Button* handle);
void button_stop(struct Button* handle);
void button_ticks(void);

#ifdef __cplusplus
}
#endif

#endif