8位数字钟程序

51数字钟程序（8位）

8位共阴数码管，外部中断进入调时模式，4个按键实现：时+；时-；分+；分-。分享给大家。

参考教材——《手把手教你学51单片机》C语言版

#include

unsigned char code LedChar[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x40};//共阴unsigned char LedBuff[]={0x00,0x00,0x00,0x00,0x00,0x00,0x00};

unsigned char KeySta[]={0xFF,0xFF,0xFF,0xFF};

unsigned char hour=0;

unsigned char min=0;

unsigned char sec=0;

unsigned char k=0; //用于KeyAction和KeyDriver

bit flag=0;

bitkeyflag=1;

sbitKeyAddhour = P2^4;

sbitKeyDechour = P2^5;

sbitKeyAddmin = P2^6;

sbitKeyDecmin = P2^7;

voidExchangeTime();

voidKeyDriver();

voidKeyAction();

void main()

{

EA = 1;

IT0 = 1;

TMOD = 0x01;

TH0 = 0xFC;

TL0 = 0x67;

ET0 = 1;

EX0=1;

TR0=1;

while(1)

{

if(keyflag)

{

ExchangeTime();

}

else

{

KeyDriver();

}

LedBuff[0]=LedChar[hour/10];

LedBuff[1]=LedChar[hour%10];

LedBuff[2]=LedChar[min/10];

LedBuff[3]=LedChar[min%10];

LedBuff[4]=LedChar[sec/10];

LedBuff[5]=LedChar[sec%10];

LedBuff[6]=LedChar[10];

}

}

voidExchangeTime()

{

if(flag==1)

{

flag=0;

sec++;

if(sec>=60)

{

sec=0;

min++;

if(min>=60)

{

min=0;

hour++;

if(hour>=24)

hour=0;

}

}

}

}

voidKeyDriver()

{

static unsigned char backup[4]={1,1,1,1};

for(k=0;k<4;k++)

{

if(backup[k]!=KeySta[k])

{

if(backup[k]!=0)

{

KeyAction();

}

backup[k]=KeySta[k];

}

}

}

voidKeyAction()

{

if(k==0)

{

hour++;

if(hour>=24)

hour=0;

}

else if(k==1)

{

hour--;

if(hour==-1)

hour=23;

}

else if(k==2)

{

min++;

if(min>=60)

{ min=0;

hour++;

if(hour>=24)

hour=0;

}

}

else if(k==3)

{

min--;

if(min==-1)

{

min=59;

hour--;

if(hour==-1)

hour=23;

}

}

else {}

}

voidLedScan()

{

static unsigned char i=0;

P1=0x00;

switch(i)

{

case 0:P0=0xFF;P1=LedBuff[0];i++;break;

case 1:P0=0xDF;P1=LedBuff[1];i++;break;

case 2:P0=0xBF;P1=LedBuff[6];i++;break;

case 3:P0=0x9F;P1=LedBuff[2];i++;break;

case 4:P0=0x7F;P1=LedBuff[3];i++;break;

case 5:P0=0x5F;P1=LedBuff[6];i++;break;

case 6:P0=0x3F;P1=LedBuff[4];i++;break;

case 7:P0=0x1F;P1=LedBuff[5];i=0;break;

}

}

voidKeyScan()

{

unsigned char j;

static unsigned char keybuff[4]={0xFF,0xFF,0xFF,0xFF};

keybuff[0]=(keybuff[0]<<1)|KeyAddhour;

keybuff[1]=(keybuff[1]<<1)|KeyDechour;

keybuff[2]=(keybuff[2]<<1)|KeyAddmin;

keybuff[3]=(keybuff[3]<<1)|KeyDecmin;

for(j=0;j<4;j++)

{

if((keybuff[j]&0x0F)==0x00)

{

KeySta[j]=0;

}

else if((keybuff[j]&0x0F)==0x0F)

{

KeySta[j]=1;

}

}

}

voidInterruptTime() interrupt 1

{

static unsigned intcnt=0;

TH0=0xFC;

TL0=0x67;

cnt++;

if(cnt>=1000)

{

cnt=0;

flag=1;

}

LedScan();

KeyScan();

}

void int0_inter() interrupt 0 {

keyflag=~keyflag;

}