定时器定时模拟数字钟显示

#include

#define uchar unsigned char

sbit P2_0 = P2^0;

sbit P2_1 = P2^1;

sbit P2_2 = P2^2;

sbit P2_3 = P2^3;

static unsigned char second,minute,hour;

unsigned int tcount;

unsigned char m;

uchar code table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,

0xf8,0x80,0x90};

void delay(uchar i)

{

uchar j,k;

for(j=i;j>0;j--)

for(k=125;k>0;k--);

}

void display()

{

P0=table[minute/10];

P2_0 = 0;

delay(5);

P2_0 = 1;

P0=(table[minute%10]& 0x7f);

P2_1 = 0;

delay(5);

P2_1 = 1;

P0=table[second/10];

P2_2 = 0;

delay(5);

P2_2 = 1;

P0=table[second%10];

P2_3 = 0;

delay(5);

P2_3 = 1;

}

/*演示主程序*/

void main(void)

{

unsigned int a;

TMOD=0x02;

TH0=0x06;

TL0=0x06;

TR0=1;

ET0=1;

EA=1;

while(1)

{

for(a=100;a>0;a--)

{

display();

}

}

}

/*

********************************************************************************

** 函数名称 ： t0(void) interrupt 1 using 0

** 函数功能 ： 定时器中断

********************************************************************************

*/

void t0(void) interrupt 1 using 0

{ tcount++;

if(tcount==4000)

{tcount=0;

second++;

if(second==60)

{second=0;

minute++;

if(minute==60)

{minute=0;

hour++;

if(hour==24)

{hour=0;

}

}

}

}

}