[其他产品] 三种按键处理函数

void keyScan(void)

{

     char i;

     uint8 m;

     uint8 R0 = 0;

     TRISB=0x38; //xls 2012-11-26 增加复位键RB5



     R0 = PORTB; //RB3,RB4,RB5按键读取

    R0 &=0x38; //保留键值

    R0 = ~R0; //正逻辑

    /*以下是RC滤波处理,R0,R1對應於KEY1,KEY2的BUF*/

     datakey.allkey = (R0>>3);//将读到的键值移至最右端 比如当前在RB1 顾右移一位 如果为RB4 R3则右移3位

    for (i=0;i<3;i++)//这里根据有几个独立按键进行设置 只有一个按键时则i=1,三个则i=3  

    {

       s_kcap[i]=((s_kcap[i]<<3)-s_kcap[i]+(datakey.allkey&0x01)<<4+4)>>3; //rc滤波及4舍5入

     datakey.allkey>>=1;

      if (s_kcap[i]>12)

     {

        datakey.allkey|=0x80;

     } 

  } 

   m=datakey.allkey;

   datakey.allkey=(datalastkey.allkey^datakey.allkey)        &datalastkey.allkey;//後沿處理

   datalastkey.allkey=m;



//datakey.allkey=(datalastkey.allkey^datakey.allkey)&datakey.allkey;  //前沿處理

//datalastkey.allkey=m;

}

extern volatile union key datakey;

extern volatile union lastkey datalastkey;

extern volatile union fistkey datafistkey;

//板上按键定义

#define K2 (datakey.allkey&0x40) 

#define K3 (datakey.allkey&0x80) //

#define K1 (datakey.allkey&0x20) //



#define LK2  (datalastkey.allkey&0x40)

#define LK3  (datalastkey.allkey&0x80) //extern volatile union var key;

#define LK1  (datalastkey.allkey&0x20)

#ifndef _MYDEFINE_H

#define _MYDEFINE_H



#define BIT bit

#define uint8  unsigned char

#define uint16 unsigned int

#define uint32 unsigned long int



#define BT_CFG2_6  RA0 

#define BT_CFG1_6  RA2

#define ON_OFF_SLEEP_WAKE_B RA3



#define _ON                                1

#define _OFF                               0

#define _TRUE                           1

#define _FLASE                            0



#define _PRINTF                  _OFF



#define Acsii(x)               x+0x30

static volatile bank3 uchar key1  [url=home.php?mod=space&uid=72445]@[/url] 0x6b;        //定义十二个按键，电平触发

static volatile bank3 uchar key2  @ 0x6c;

static volatile bank3 uchar lkey1 @ 0x6d;        //定义十二个按键，前沿触发

static volatile bank3 uchar lkey2 @ 0x6f;



static volatile  bit    k0    @ (unsigned)&key1*8+0;

static volatile  bit    k1    @ (unsigned)&key1*8+1;

static volatile  bit    k2    @ (unsigned)&key1*8+2;

static volatile  bit    k3    @ (unsigned)&key1*8+3;

static volatile  bit    k4    @ (unsigned)&key1*8+4;

static volatile  bit    k5    @ (unsigned)&key1*8+5;

static volatile  bit    k6    @ (unsigned)&key1*8+6;

static volatile  bit    k7    @ (unsigned)&key1*8+7;



static volatile bit    k8    @ (unsigned)&key2*8+0;

static volatile bit    k9    @ (unsigned)&key2*8+1;

static volatile bit    k10    @ (unsigned)&key2*8+2;

static volatile bit    k11    @ (unsigned)&key2*8+3;



static volatile bit    lk0    @ (unsigned)&lkey1*8+0;

static volatile bit    lk1    @ (unsigned)&lkey1*8+1;

static volatile bit    lk2    @ (unsigned)&lkey1*8+2;

static volatile bit    lk3    @ (unsigned)&lkey1*8+3;

static volatile bit    lk4    @ (unsigned)&lkey1*8+4;

static volatile bit    lk5    @ (unsigned)&lkey1*8+5;

static volatile bit    lk6    @ (unsigned)&lkey1*8+6;

static volatile bit    lk7    @ (unsigned)&lkey1*8+7;



static volatile bit    lk8    @ (unsigned)&lkey2*8+0;

static volatile bit    lk9    @ (unsigned)&lkey2*8+1;

static volatile bit    lk10 @ (unsigned)&lkey2*8+2;

static volatile bit    lk11 @ (unsigned)&lkey2*8+3;



uchar keycnt;



void keyscan(void)                    //按键扫描

{

    keycnt++;

    xs0=xs1=xs2=xs3=xs4=xs5=xs6=xs7=RD7=0; //



    TRISD=0X0F;                    //



    RD6=1;RD5=0;RD4=1;            //(k4~k7)

    asm("nop");asm("nop");

    R0=(RD^0X0f)&0x0f;

    R0=R0<<4;



    RD4=0;RD5=1;RD6=1;            //(k0~k3)

    asm("nop");asm("nop");

    R0+=((RD^0X0F)&0X0F);



    RD6=0;RD5=1;RD4=1;            //(k8~k11

    asm("nop");asm("nop");

    R1=(RD^0X0f)&0x0f;



    if(R0|R1)                    //有键?

     {     

          if(keycnt>=12)

            {keycnt=0;

              key1=R0;key2=R1;

            }

           else

            {key1=lkey1;//lkey1电平值，key1，前沿值

             key2=lkey2;

            }

    }

    else

        {key1=key2=0;

         keycnt=0;

        }

    R2=key1;R3=key2;

    key1=key1&(lkey1^key1);    lkey1=R2;

    key2=key2&(lkey2^key2);    lkey2=R3;

}

BOOL Switch2IsPressed(void)

{

    if(sw2 != old_sw2)

    {

        old_sw2 = sw2;                  // Save new value

        if(sw2 == 0)                    // If pressed

            return TRUE;                // Was pressed

    }//end if

    return FALSE;                       // Was not pressed

}//end Switch2IsPressed





typedef enum _BOOL { FALSE = 0, TRUE } BOOL;