#include <reg52.h>
#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();
}
}
}
/*
********************************************************************************
** 函數(shù)名稱 ： t0(void) interrupt 1 using 0
** 函數(shù)功能 ： 定時(shí)器中斷
********************************************************************************
*/
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;
}
}
}
}
}