#include "delay.h"
#include "sys.h"
#include "Key.h"
#include <stdlib.h>

#define KeyPin PAin(5)
typedef enum
{
 KeyDown,
 KeyUp,
 KeyShort,
 KeyLong
}KEYSTATE;
KEYSTATE KeyState;
void KeyPinInit(void)
{
 GPIO_InitTypeDef  GPIO_InitStructure;

 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);  //使能PB端口时钟
 
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;//KeyPin检测    
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
 GPIO_Init(GPIOA, &GPIO_InitStructure);
}
static u16 KeyDownTimes,KeyDoubleTimes;
void PollingKey(void)
{
 static u8 KeyStep;
 
 switch (KeyStep)
 {
  case 0:
  {
   if (!KeyPin)//有键按下
   {
    //printf("\r\n按下");
    KeyState = KeyDown;
    
    if (KeyDoubleTimes > 0)
    {
     KeyStep = 4;//双击
    }
    else
    {
     KeyStep = 2;//不是双击
    }
   }
   else if(KeyDoubleTimes > 0)
   {
    KeyDoubleTimes--;
    if ((KeyDoubleTimes == 0)&&(KeyState == KeyShort))
    {
     printf("\r\n短按处理");
     KeyState = KeyUp;
    }
   }
   
  }
   break;
  case 1://按下
  {
   if (!KeyPin)
   {
    KeyDownTimes++;
    if (KeyDownTimes < 2800)
    {
     KeyState = KeyShort;
    }
    else if(KeyState != KeyLong)
    {
     KeyState = KeyLong;
     printf("\r\n长按处理");
    }
    else if (KeyDownTimes >= 2800)//防止加满溢出
    {
     KeyDownTimes = 2800;
    }
   }
   else
   {
    KeyStep = 2;
   }
  }
   break;
  case 2://
  {
   if (KeyPin)//弹起
   {
    KeyStep = 3;
   }
   else//按下
   {
    KeyStep = 1;
   }
  }
   break;
  case 3://弹起
  {
   if (KeyPin)//弹起
   {
    if (KeyDownTimes < 2800)
    {
     KeyDoubleTimes = 500;
    }
    KeyDownTimes = 0;
    KeyStep = 0;
   }
   else
   {
    KeyStep = 2;
   }
  }
   break;
  case 4:
  {
   if (KeyPin)//如果弹起的话就执行
   {
    KeyState = KeyUp;
    printf("\r\n双击处理");
    KeyStep = 0;
   }
  }
   break;
 default:
  KeyStep = 0;
  break;
 }
 delay_us(100);
}

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