#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit DU=P2^6;
sbit WE=P2^7;
uint key;
uchar code table[]={0x3f,0x06,0x5b,
0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
0x77,0x7c,0x39,0x5e,0x79,0x71};
void delayms(uint xms)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}//键盘扫描
void keyscan()
{
uchar temp;
temp=P3;
switch(temp)
{
case 0xee:key=0;break;
case 0xde:key=1;break;
case 0xbe:key=2;break;
case 0x7e:key=3;break;
case 0xed:key=4;break;
case 0xdd:key=5;break;
case 0xbd:key=6;break;
case 0x7d:key=7;break;
case 0xeb:key=8;break;
case 0xdb:key=9;break;
case 0xbb:key=10;break;
case 0x7b:key=11;break;
case 0xe7:key=12;break;
case 0xd7:key=13;break;
case 0xb7:key=14;break;
case 0x77:key=15;break;
}
}
//显示函数
void display()
{
keyscan();
DU=1;
DU=0;
P0=table[key];
WE=1;
WE=0;
}
//主函数
void main()
{
P3=0xff;
while(1)
{
display();
}
}
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