puzhong 51矩阵键盘短按，长按数码管加减数

#include <REGX52.H>
typedef     unsigned char   u8;
typedef     unsigned int    u16;
typedef     unsigned long   u32;
//数码管段码表              0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7C,0x39,0x5E,0x79,0x71,
unsigned char NixieTable[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
u8  KeyCode;    //给用户使用的键码, 1~16有效
u8 IO_KeyState, IO_KeyState1;    //行列键盘变量
u16 IO_KeyHoldCnt;
u8 code T_KeyTable[16] = {0,1,2,0,3,0,0,0,4,0,0,0,0,0,0,0};
u8 LEDbuf[9];
bit longpressflag=0;
void    IO_KeyScan(void);   //50ms call
void IO_KeyDelay(void);

//延时子函数
void Delay(unsigned int xms)
{
    unsigned char i, j;
    while(xms--)
    {
        i = 2;
        j = 239;
        do
        {
            while (--j);
        } while (--i);
    }
}

//数码管显示子函数
void Nixie(unsigned char Location,Number)
{
    unsigned char numtemp;
    switch(Location)        //位码输出
    {
        case 1:P2_4=1;P2_3=1;P2_2=1;break;
        case 2:P2_4=1;P2_3=1;P2_2=0;break;
        case 3:P2_4=1;P2_3=0;P2_2=1;break;
        case 4:P2_4=1;P2_3=0;P2_2=0;break;
        case 5:P2_4=0;P2_3=1;P2_2=1;break;
        case 6:P2_4=0;P2_3=1;P2_2=0;break;
        case 7:P2_4=0;P2_3=0;P2_2=1;break;
        case 8:P2_4=0;P2_3=0;P2_2=0;break;
    }
 // P0= numtemp;
    P0=NixieTable[Number];  //段码输出
    Delay(2);               //显示一段时间
    P0=0x00;                //段码清0，消影

}

void main()
{
    u16 valtemp=0;
//      Nixie(3,6);     //在数码管的第1位置显示1
        Delay(20);
//      Nixie(4,7);     //在数码管的第2位置显示2
//      Delay(20);
//      LEDbuf[7] = NixieTable[7]; //显示键码
//              LEDbuf[8] = NixieTable[8]; //显示键码
    
    while(1)
    {
    //  Nixie(3,6);     //在数码管的第1位置显示1
//      Nixie(4,7);     //在数码管的第2位置显示2 
        Nixie(6,  LEDbuf[6]);   
        Nixie(7,    LEDbuf[7]); 
        

        
        IO_KeyScan();
    
    
     if(KeyCode > 0)     //有键按下
    {
                if(KeyCode == 17 && longpressflag ==0)   //hour +1
            {
                valtemp =valtemp+1;
                if(valtemp>=99)valtemp=0;
                 LEDbuf[6] = valtemp/10; //显示键码
                LEDbuf[7] = valtemp%10; //显示键码
            }
            if(KeyCode == 18 && longpressflag ==0)   //hour -1
            {
                valtemp =valtemp-1;
                if(valtemp<=0)valtemp=99;
       LEDbuf[6] = valtemp/10; //显示键码
                LEDbuf[7] = valtemp%10; //显示键码
            }
            
                    if(KeyCode == 17 && longpressflag ==1)   //hour +1
            {
                valtemp =valtemp+1;
                if(valtemp>=99)valtemp=0;
                longpressflag =0;
                 LEDbuf[6] = valtemp/10; //显示键码
                LEDbuf[7] = valtemp%10; //显示键码
            }
            if(KeyCode == 18 && longpressflag ==1)   //hour -1
            {
                    valtemp =valtemp-1;
                if(valtemp<=0)valtemp=99;
                longpressflag =0;
        LEDbuf[6] = valtemp/10; //显示键码
                LEDbuf[7] = valtemp%10; //显示键码
            }
            
                    if(KeyCode == 19)   //hour +1
            {
                LEDbuf[6] = valtemp/10; //显示键码
                LEDbuf[7] = valtemp%10; //显示键码
            }
            if(KeyCode == 20)   //hour -1
            {
       LEDbuf[6] = valtemp/10; //显示键码
                LEDbuf[7] = valtemp%10; //显示键码
            }
            KeyCode = 0;
    }
        
        
        
    }
}

void IO_KeyDelay(void)
{
    u8 i;
    i = 200;
    while(--i)  ;
}

void    IO_KeyScan(void)    //50ms call
{
    u8  j;

    j = IO_KeyState1;   //保存上一次状态

    P1 = 0xf0;  //X低，读Y
    IO_KeyDelay();
    IO_KeyState1 = P1 & 0xf0;

    P1 = 0x0f;  //Y低，读X
    IO_KeyDelay();
    IO_KeyState1 |= (P1 & 0x0f);
    IO_KeyState1 ^= 0xff;   //取反
    
    if(j == IO_KeyState1)   //连续两次读相等
    {
        j = IO_KeyState;
        IO_KeyState = IO_KeyState1;
        if(IO_KeyState != 0)    //有键按下
        {
            F0 = 0;
            if(j == 0)  F0 = 1; //第一次按下
            else if(j == IO_KeyState)
            {
                if(++IO_KeyHoldCnt >= 100)   //1秒后重键
                {
                                      longpressflag = 1;
                    IO_KeyHoldCnt = 100;
                    F0 = 1;
                }
            }
            if(F0)
            {
                j = T_KeyTable[IO_KeyState >> 4];
                if((j != 0) && (T_KeyTable[IO_KeyState& 0x0f] != 0)) 
                    KeyCode = (j - 1) * 4 + T_KeyTable[IO_KeyState & 0x0f] + 16;    //计算键码，17~32
            }
        }
        else    IO_KeyHoldCnt = 0;
    }
    P1 = 0xff;
}