按键单双击，长按自用笔记

// 初始化按键
void Key_State_Init(KEY* key) {
    key->state = KEY_STATE_IDLE;
    key->isLongPress = false;
}

// 检测按键状态
KeyEvent Check_Key(KEY* key, bool isPressed)
{
    KeyEvent event = KEY_EVENT_NONE;
    static char passtimes=0;
//		currentTime++;
		static bool realpress=0;
		if(isPressed)
		{
			if(++passtimes>=2)
			{
				realpress=1;
			}
		}else
		{
			passtimes=0;
			realpress=0;
		}
		key->currentTime++;
    switch (key->state) 
		{
        case KEY_STATE_IDLE:
            if (realpress) {
                key->state = KEY_STATE_PRESSED;
                key->pressTime = key->currentTime;
                key->isLongPress = false;
            }
            break;

        case KEY_STATE_PRESSED:
            if (realpress) // 检测是否是长按
            {
                if (((key->currentTime)-(key->pressTime)) >= 400) { // 长按时间阈值设为2秒
                    key->isLongPress = true;
                    key->state = KEY_WAIT_RELEASED;//自加
                    event = KEY_EVENT_LONG_PRESS;
                }
               
            } else 
            {

							key->state = KEY_WAIT_RELEASED;
							//key->state = KEY_STATE_WAITING_DOUBLE_CLICK;需要双击判断再放出来
							event = KEY_EVENT_CLICK;//超时触发单击
              key->releaseTime = key->currentTime;
                
            }
            break;
        case KEY_STATE_WAITING_DOUBLE_CLICK:
            if (realpress) 
            {
                //计算时间差是否触发双击
                if (((key->currentTime)-(key->releaseTime)) <= 30) 
                { // 双击时间阈值设为
                    key->state = KEY_WAIT_RELEASED;
                    event = KEY_EVENT_DOUBLE_CLICK;
                }  
            } else if(((key->currentTime)-(key->releaseTime))>30)
            {
                event = KEY_EVENT_CLICK;//超时触发单击
                key->state = KEY_WAIT_RELEASED;
            }
            break;
        
        case KEY_WAIT_RELEASED:
            if (!realpress) 
            {
                key->state = KEY_STATE_IDLE;
            }
            break;
    }

    return event;
}

#ifndef __KEY_H
#define __KEY_H
#include <stdbool.h>
#include "stm32f10x.h" 

#define KEY1   (GPIO_ReadInputDataBit(GPIOA, GPIO_Pin_0))

// 返回事件
typedef enum {
    KEY_EVENT_NONE,    // 无事件
    KEY_EVENT_CLICK,   // 单击
    KEY_EVENT_DOUBLE_CLICK,// 双击
    KEY_EVENT_LONG_PRESS// 长按
} KeyEvent;

// 按键状态
typedef enum {
    KEY_STATE_IDLE,    // 空闲
    KEY_STATE_PRESSED, // 按下
    KEY_STATE_RELEASED,// 松开
    KEY_STATE_WAITING_DOUBLE_CLICK,// 等待双击
    KEY_WAIT_RELEASED //等待放开
} KeyState;



// ?????
typedef struct {
    KeyState state;    // ????
    int pressTime;  // ????
    int releaseTime;// ????
    int isLongPress;  // ????
		int currentTime;
} KEY;

void Key_Init(KEY* key);
KeyEvent Check_Key(KEY* key, bool isPressed);

#endif