#include

typedef unsigned int UINT  ;

typedef unsigned char UCHAR        ;

#define KEY P2

#define KEYMASK   0x07

sbit LE1 = P2^6;  //定义位控口

sbit LE2 = P2^7;  //定义段控口

UCHAR KeyPressDown = 0x00;

UCHAR KeyRelease = 0x00;

UCHAR LastKey = 0x00;

UCHAR MODE ;

extern UCHAR HH;

extern UCHAR MM;

extern UCHAR SS;

extern bit T_CYCLE  ;

extern void T0_Init(void);        //初始化定时器，函数定义在Timer.c

UCHAR code NUM[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};

void delay(UINT t) //延时t时钟周期

{

while (t--)        ;

}

void H_Increase(void)        //小时增1

{

if(HH<23) HH++;

else

{

HH = 0;

}

}

void M_Increase(void)  //分钟增1

{

if(MM<59) MM++;

else

{

MM = 0;

H_Increase();

}

}

void S_Increase(void)  //秒增1

{

if(SS<59) SS++;

else

{

SS = 0;

M_Increase();

}

}

void display(UCHAR SEG,UCHAR Digi) //显示一位数码管，SEG = 0-9数字，Digi = 第0-6位

{

LE2 = 1;

P0 = (0x01<

LE2 = 0;

P0 = 0x00;

LE1 = 1;

P0 = NUM[SEG];

if (Digi==1||Digi==3) P0 &= 0x7f        ;  //显示分隔符

delay(50);

P0 = 0xff;

LE1 = 0;

}

void main(void)

{

P0 = 0xff;

LE1 = 0;

LE2 = 0;

T0_Init();

while(1)

{

if(MODE != 1 || T_CYCLE)

{

display(HH/10,0);  //显示小时十位数

display(HH%10,1);  //显示小时个位数

}

if(MODE != 2  || T_CYCLE)

{

display(MM/10,2);  //显示分钟十位数

display(MM%10,3);  //显示分钟个位数

}

display(SS/10,4);  //显示秒十位数

display(SS%10,5);  //显示秒个位数

}

}

void key_Process(void)                 //按键处理程序

{

UCHAR CurrKey;

KEY |= KEYMASK;  //将按键对应的IO设置为输入状态

CurrKey = (~KEY) & KEYMASK;

KeyPressDown = (~LastKey) & CurrKey;

KeyRelease = LastKey & (~CurrKey);

LastKey = CurrKey;

switch(KeyRelease)

{

case 1:

if(MODE == 2) MODE = 0;

else MODE ++;

break;

case 2:

if(MODE == 1) H_Increase() ;

if(MODE == 2) M_Increase() ;

break;

case 4:

SS = 0;

break;

default: break;

}

}

//Timer#include

typedef unsigned int UINT  ;

typedef unsigned char UCHAR        ;

UCHAR HH = 14;         //小时初始值

UCHAR MM = 2;         //分钟初始值

UCHAR SS = 55;         //秒初始值

UINT u_10ms  = 0; //10ms计数

bit T_CYCLE = 0;

extern void key_Process(void);

extern void S_Increase(void);

void T0_Init(void)

{

TMOD &= 0xf0;

TMOD |= 0x01;

//定时器赋初始值，定时时间为10ms。

TH0 = 0xd8;

TL0 = 0xf0;

TR0 = 1;

IE = 0x82;

}

void T0_INTSrv(void) interrupt 1

{

//定时器重新开始计时。

TH0 = 0xd8;

TL0 = 0xf0;

u_10ms ++;

if (u_10ms%20==0)        // 200 ms

{

T_CYCLE = !        T_CYCLE; //闪烁循环

}

if (u_10ms>99)        // 1000 ms = 1 second

{

u_10ms = 0;

S_Increase();

}

key_Process();        //SET按键处理

}