#include <at89x51.h>
#define uchar unsigned char
#define uint unsigned int
sbit S_SET=P3^0;
sbit M_SET=P3^1;
sbit H_SET=P3^2;
unsigned char code dispcode[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71,0x00};
unsigned char dispbitcode[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned char dispbuf[8]={0,0,16,0,0,16,2,1};
uchar dispbitcnt;
uchar second;
uchar minite;
uchar hour;
uint tcnt;
uchar mstcnt;
uchar i,j;
//主函数
void main(void)
{
TMOD=0x02;//定时器方式2
TH0=0x06;
TL0=0x06;
TR0=1;
ET0=1;
EA=1;
hour=12;
while(1)
{
if(S_SET==0)
{
for(i=5;i>0;i--)
for(j=248;j>0;j--);
if(S_SET==0)
{
second++;
if(second==60)
{
second=0;
}
dispbuf[0]=second%10;
dispbuf[1]=second/10;
while(S_SET==0);
}
}
if(M_SET==0)
{
for(i=5;i>0;i--)
for(j=248;j>0;j--);
if(M_SET==0)
{
minite++;
if(minite==60)
{
minite=0;
}
dispbuf[3]=minite%10;
dispbuf[4]=minite/10;
while(M_SET==0);
}
}
if(H_SET==0)
{
for(i=5;i>0;i--)
for(j=248;j>0;j--);
if(H_SET==0)
{
hour++;
if(hour==24)
{
hour=0;
}
dispbuf[6]=hour%10;
dispbuf[7]=hour/10;
while(H_SET==0);
}
}
}
}
void t0(void) interrupt 1 using 0
{
mstcnt++;
if(mstcnt==8)
{
mstcnt=0;
P2=0xff; //关闭所有显示
P0=dispcode[dispbuf[dispbitcnt]];
P2=dispbitcode[dispbitcnt];
dispbitcnt++;
if(dispbitcnt==8)
{
dispbitcnt=0;
}
}
tcnt++;
if(tcnt==4000)
{
tcnt=0;
second++;
if(second==60)
{
second=0;
minite++;
if(minite==60)
{
minite=0;
hour++;
if(hour==24)
{
hour=0;
}
}
}
dispbuf[0]=second%10;
dispbuf[1]=second/10;
dispbuf[3]=minite%10;
dispbuf[4]=minite/10;
dispbuf[6]=hour%10;
dispbuf[7]=hour/10;
}
}
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