#include<reg51.h>
#include<AT24C02.h>
#define uchar unsigned char
#define uint unsigned int
sbit P3_2=P3^2;
uchar code led_mod[]={0x3f,0x06,0x5b,0x4f,0x66,
0x6d,0x7d,0x07,0x7f,0x6f,0x00};
uchar code BitCode[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
uchar huanchong[]={10,10,10,10,10,10,10,10};
uchar convert[]={10,10,10,10,10,10,10,10};
uchar a=0;
void int0() interrupt 0
{
uchar code RowCode[]={0xfe,0xfd,0xfb,0xf7};
uchar temp,row,column,i,y,z;
uchar m,n;
P1=0xf0;
temp = P1 & 0xf0;
if (temp != 0xf0)
{
P2=0xff;
switch (temp)
{
case 0x70: column = 3; break;
case 0xb0: column = 2; break;
case 0xd0: column = 1; break;
case 0xe0: column = 0; break;
default: break;
}
for (i=0;i<4;i++)
{
P1 = RowCode[i];
temp = P1 & 0xf0;
if (temp !=0xf0)
{
row = i;break;
}
}
y= row *4 + column;
if(y<10)
{
if(a<8)
{
huanchong[a++]=y;
m=a;
for(n=0;n<a;n++)
{
convert[n]=huanchong[--m];
}
}
}
if(y>=10)
{
P2=0xff;
a=0;
for(z=0;z<8;z++)
{
huanchong[z]=10;
convert[z]=10;
}
}
while((P1 & 0xf0) !=0xf0);
}
}
void BufToSeg(void)
{
uchar i=0;
for(;i<8;i++)
{
P0=led_mod[10];
P2= BitCode[i];
P0=led_mod[convert[i]];
}
}
void main(void)
{
EA=1;
EX0=1;
IT0=1;
while(1)
{
P1=0x0f;
BufToSeg();
}
}
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