本人刚学编程自己编了一程序但不能正常工作求指导

只看该作者 · 2012-10-28 13:15

本人看了郭天祥的书，看了他的4*4按键电路编程，然后自己想了想就编了这个自己觉得比较简化的程序，能写进单片机，但是就是实现不了功能！求指导！
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit duan=P2^6;
sbit wei=P2^7;
uchar code table[]={
0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,
0xc6,0xa1,0x86,0x8e};
void yanshi(uint xms)
{
uint i,j;
for(i=xms;i>0;i--)
  for(j=110;j>0;j--);
}
void xian(uchar num)
{
  P0=table[num];
  duan=1;
  duan=0;
}
void matrixkeyscan()
{
  uchar key,kan;
  P3=0xf0;
  yanshi(10);
  if(P3!=0xf0)
{
yanshi(10);
if(P3!=0xf0)
{
key=P3;
switch(key)
{
   case 0xee:
kan=0;
break;
case 0xde:
kan=1;
break;
case 0xbe:
kan=2;
break;
case 0x7e:
kan=3;
break;
case 0xed:
kan=4;
break;
case 0xdd:
kan=5;
break;
case 0xbd:
kan=6;
break;
case 0x7d:
kan=7;
break;
case 0xeb:
kan=8;
break;
case 0xdb:
kan=9;
break;
case 0xbb:
kan=10;
break;
case 0x7b:
kan=11;
break;
case 0xe7:
kan=12;
break;
case 0xd7:
kan=13;
break;
case 0xb7:
kan=14;
break;
case 0x77:
kan=15;
break;
}
while(P3!=0xf0)
{
yanshi(10);
P3=0xf0;
yanshi(5);
}
xian(kan);
  }
  }
}
void main()
{
  P0=0xff;
  duan=1;
  duan=0;
  P0=0xc0;
  wei=1;
  wei=0;
  while(1)
  {
  matrixkeyscan();
  }
}