程序:
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
sbit fm=P2^3;
sbit ctr=P3^2;
uchar flag=0;
uchar j,k,c1,c0,m,n=255;
uchar pp;
int k1=0;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uint i)
{
for(j=i;j>0;j--)
for(k=118;k>0;k--);
}
void display(uchar a,uchar b)
{
P0=table[a];
dula=1;
dula=0;
P0=0xef;
wela=1;
wela=0;
delay(5);
P0=table[b];
dula=1;
dula=0;
P0=0xdf;
wela=1;
wela=0;
delay(5);
}
void main(void)
{
int k=0;
TMOD|=0x01;
TR0=0;
IT0=1;
EX0=1;
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
ET0=1;
fm=1;
P1=0XFF;
EA=1;
while(1)
{
if(flag==1)
{
if(pp==20)
{
pp=0;
m++;
if(m==60)
{
TR0=0;
ET0=0;
flag=0;
m=0;
for(k=0;k<20;k++)
{
P1=~P1;
fm=!fm;
delay(500);
}
fm=1;
}
}
c0=m%10;
c1=m/10;
display(c1,c0);
}
else
display(8,8);
}
}
void int0(void) interrupt 0
{
delay(10);
if(ctr==0)
{
flag++;
}
if(flag==1)
{
TR0=1;
pp=0;
m=0;
fm=1;
ET0=1;
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
}
else if(flag==2)
{
display(8,8);
ET0=flag=0;
TR0=0;
fm=0;
pp=0;
m=0;
for(k1=0;k1<20;k1++)
{
P1=~P1;
delay(500);
}
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
}
}
void time0(void) interrupt 1
{
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
pp++;
}