#include<reg51.h>
#define char unsigned char
char code dis_7[12] ={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0xb2,0xf8,0x80,0x90,0xff,0xbf};
char code scan_con[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
char data dis[8] = {0x00,0x00,0x0b,0x00,0x00,0x0b,0x00,0x00};
char data timedata[3] = {0x00,0x00,0x00};
char data ms50=0x00, con=0x00, con1=0x00, con2=0x00;
sbit key0 = P1^0;
sbit key1 = P1^1;
sbit key2 = P1^2;
delaylms(int t)
{
int i,j;
for(i=0;i<t;i++)
for(j=0;j<120;j++)
;
}
keyscan()
{
EA=0;
if(key0 == 0)
{
delaylms(10);
while(key0 == 0);
con++;TR0=0;ET0=0;
if(con >= 3)
{con=0;TR0=0;ET0=0;}
}
if(con != 0)
{
if(key1 == 0)
{
delaylms(10);
while(key1 == 0);
timedata[con]++;
if(con == 2) con1=24; else con1=60;
if(timedata[con] >= con1)
{timedata[con] = 0;}
}
}
if(con != 0)
{
if(key2 == 0)
{
delaylms(10);
while(key2 == 0);
timedata[con]--;
if(con == 2) con2=23; else con2=59;
if(timedata[con] <= 0)
{timedata[con] = con2;}
}
}
EA=1;
}
scan()
{
char k;
dis[0]=timedata[0]%10; dis[1]=timedata[0]/10;
dis[3]=timedata[1]%10; dis[4]=timedata[1]/10;
dis[6]=timedata[2]%10; dis[7]=timedata[2]/10;
for (k=0;k<8;k++)
{
P0=dis_7[dis[k]]; P2=scan_con[k]; delaylms(1); P2=0xff;
}
}
main()
{
TH0=0x3c; TL0=0xb0;
TMOD=0x01; ET0=1; TR0=1; EA=1;
while(1)
{
scan();
keyscan();
}
}
void time_intt0(void) interrupt 1
{
ET0=0; TR0=0; TH0=0x3c; TL0=0xb0; TR0=1;
ms50++;
if(ms50 == 20)
{
ms50=0x00; timedata[0]++;
if(timedata[0] == 60)
{
timedata[0]=0; timedata[1]++;
if(timedata[1] == 60)
{
timedata[1]=0; timedata[2]++;
if(timedata[2] == 24)
{timedata[2] = 0;
}
}
}
}
ET0 = 1;
}
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