4x4矩阵阵键盘小程序

ID:37685 · 发表于 2013-9-5 13:28

控制4x4矩阵键盘，当1号键按下以后数码管显示1,2号键按下时显示2，...，当10号按键按下时显示A,...,当15号按键按下时显示F，当16号键按下时显示 error,而初次开机的时候显示 HELLO...
#include<reg52.h>
#define uint  unsigned int
#define uchar unsigned char
uchar code smg_duan[]={0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F,0x77,0x7c,0x39,0x5e,0x79,0x71};
uchar code smg_wei[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
uchar code smg_open[]={0x80,0x80,0x80,0x3f,0x38,0x38,0x79,0x76};
uchar code smg_error[]={0x50,0x5c,0x50,0x50,0x79};
void delay(uint);
uchar keyscan();
void error_display();
void open_display();
sbit C_JA=P2^0;
sbit C_JB=P2^1;
uchar keyboard,num;
void main()
{
  num=17;
  C_JA=0;
  C_JB=0;
  P1=0x7f;
  C_JA=1;
  C_JA=0;

  while(num==17)
{
open_display();
keyscan();
}
  while(1)
{

if(num==15)
   {
   error_display();
   }
P1=0x7f;
C_JA=1;
C_JA=0;
P1=smg_duan[num];
C_JB=1;
C_JB=0;
keyscan();

}
}
uchar keyscan()
{
  P0=0xfe;
  keyboard=P0;
  keyboard=keyboard&0xf0;
  if(keyboard!=0xf0)
{
delay(6);
keyboard=P0;
keyboard=keyboard&0xf0;
if(keyboard!=0xf0)
   {
   switch(keyboard)
   {
      case 0xe0:num=3;
      break;
      case 0xd0:num=2;
      break;
      case 0xb0:num=1;
      break;
      case 0x70:num=0;
      break;
   }
   }
}

  P0=0xfd;
  keyboard=P0;
  keyboard=keyboard&0xf0;
  if(keyboard!=0xf0)
{
delay(6);
keyboard=P0;
keyboard=keyboard&0xf0;
if(keyboard!=0xf0)
   {
   switch(keyboard)
   {
      case 0xe0:num=7;
      break;
      case 0xd0:num=6;
      break;
      case 0xb0:num=5;
      break;
      case 0x70:num=4;
      break;
   }
   }
}

  P0=0xfb;
  keyboard=P0;
  keyboard=keyboard&0xf0;
  if(keyboard!=0xf0)
{
delay(6);
keyboard=P0;
keyboard=keyboard&0xf0;
if(keyboard!=0xf0)
   {
   switch(keyboard)
   {
      case 0xe0:num=11;
      break;
      case 0xd0:num=10;
      break;
      case 0xb0:num=9;
      break;
      case 0x70:num=8;
      break;
   }
   }
}

  P0=0xf7;
  keyboard=P0;
  keyboard=keyboard&0xf0;
  if(keyboard!=0xf0)
{
delay(6);
keyboard=P0;
keyboard=keyboard&0xf0;
if(keyboard!=0xf0)
   {
   switch(keyboard)
   {
      case 0xe0:num=15;
      break;
      case 0xd0:num=14;
      break;
      case 0xb0:num=13;
      break;
      case 0x70:num=12;
      break;
   }
   }
}
return num;

}
void error_display()
{
  uchar i;
  for(i=0;i<5;i++)
{
P1=smg_wei[i];
C_JA=1;
C_JA=0;
P1=smg_error[i];
C_JB=1;
C_JB=0;

delay(3);
P1=0x00;
C_JB=1;
C_JB=0;
}
}
void open_display()
{
  uchar i;
  for(i=0;i<8;i++)
{

P1=smg_wei[i];
C_JA=1;
C_JA=0;
P1=smg_open[i];
C_JB=1;
C_JB=0;

delay(4);
P1=0x00;
C_JB=1;
C_JB=0;
}
}
void delay(uint z)
{
  uint x,y;
  for(x=z;x>0;x--)
for(y=70;y>0;y--);
}

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