按键功能一直调不出来，郁闷（见代码）

只看该作者 · 2008-11-20 10:30

只是想测试下按键

#include <reg52.h>

#define uchar unsigned char
#define uint unsigned int
uchar eo;
uchar key;
uchar input;
sbit wdi=P1^7;
sbit led1=P1^4;
sbit led2=P1^5;

void main ()
{
//P1=0x0F;
P1=0X00;
eo=P1&0x08;
while(1)
{
   if(eo==0X08)
   {
    input=P1&0x07;
    switch(input)
    {
     case 0: key=8;led1=1;break;
     case 1: key=7;led1=0;break;
     case 2: key=6;led1=1;break;
     case 3: key=5;led1=0;break;
     case 4: key=4;led2=1;break;
     case 5: key=3;led2=0;break;
     case 6: key=2;led2=1;break;
     case 7: key=1;led2=0;break;
     default :break;
    }
   }
   wdi=!wdi;
}
}

单片机为AT89C55WD

现在是按键无反应

请大侠指教