_ygz_ 发表于 2015-3-23 16:06
这程序不完整吧？！还有你硬件怎么连的？我最近也在学键盘扫描，可以交流下！ ...

具体要求是通过矩阵键盘输入  然后在单个共阳数码管上输出，源程序是这样的#include<reg52.h>
#define dateport P1
#define keyport P3
unsigned char table[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
unsigned char keyscan(void);
unsigned char keypro(void);
void delay1(unsigned char t);
void delay2(unsigned char t);
void main(void)
{
while(1)
{
switch(keypro())
  {
   case 0:P1=table[0];break;
   case 1:P1=table[1];break;
   case 2:P1=table[2];break;
   case 3:P1=table[3];break;
   case 4:P1=table[4];break;
   case 5:P1=table[5];break;
   case 6:P1=table[6];break;
   case 7:P1=table[7];break;
   case 8:P1=table[8];break;
   case 9:P1=table[9];break;
   case 10:P1=table[10];break;
   case 11:P1=table[11];break;
   case 12:P1=table[12];break;
   case 13:P1=table[13];break;
   case 14:P1=table[14];break;
   case 15:P1=table[15];break;
   default:break;
  }
}

}
void delay1(unsigned char t)
{
while(t--);
}

void delay2(unsigned char t)
{
while(t--)
{
delay1(245);
delay1(245);
}
}
unsigned char keyscan(void)
{
unsigned char val;
keyport=0xf0;
if(keyport!=0xf0)
{
delay2(10);
if(keyport!=0xf0)
  {
keyport=0xfe;
if(keyport!=0xfe)
   {
   val=keyport&0xf0;
   val+=0x0e;
while(keyport!=0xfe);
delay2(10);
while(keyport!=0xfe);
return val;
   }
keyport=0xfd;
if(keyport!=0xfd)
   {
   val=keyport&0xf0;
   val+=0x0d;
while(keyport!=0xfd);
delay2(10);
while(keyport!=0xfd);
return val;
   }
keyport=0xfb;
if(keyport!=0xfb)
   {
   val=keyport&0xf0;
   val+=0x0b;
while(keyport!=0xfb);
delay2(10);
while(keyport!=0xfb);
return val;
   }
keyport=0xf7;
if(keyport!=0xf7)
   {
   val=keyport&0xf0;
   val+=0x07;
while(keyport!=0xf7)
delay2(10);
while(keyport!=0xf7)
return val;
   }
  }
}
return 0xff;
}

unsigned char keypro(void)
{
switch(keyscan())
{
case 0x7f:return 0;break;
case 0x7d:return 1;break;
case 0x7b:return 2;break;
case 0x77:return 3;break;
case 0xbe:return 4;break;
case 0xbd:return 5;break;
case 0xbb:return 6;break;
case 0xb7:return 7;break;
case 0xde:return 8;break;
case 0xdd:return 9;break;
case 0xdb:return 10;break;
case 0xd7:return 11;break;
case 0xee:return 12;break;
case 0xed:return 13;break;
case 0xeb:return 14;break;
case 0xe7:return 15;break;
default: return 0xff;break;
}
}
但是我运行之后发现好像有问题，就是有几个键按了之后没反应，但问题具体在哪儿我还没搞明白。一起看看咯