原创 4*4矩阵键盘C程序

刚学C语言,今儿整理了他的一个键盘程序,用了还行,单片机能够正常工作.

用的是单片机的P1口,

显示是用的串口调试的.

     #include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
#define duank P1               //键盘到单片机的端口
//DB 50H,1CH,39H,16H,38H,78H,70H,0FEH,0EFH,0FFH;A B, C,    D, E, ,F   ,P, -, ,. ,COLSE
//DB 01H,0C7H,22H,82H,0C4H,88H,08H,0C3H,00H,80H;带小数点的字形码0.,1.,-----9.

uchar code table[]={     //键盘编码"1~F~0"
0xD7,0x32,0x92,0xD4,
0x98,0x18,0xD1,0x10,
0x90,0x50,0x1C,0x39,
0x16,0x38,0x78,0x11};
uchar num,temp,num1;
void delay(uint z)      //延时子程序 Zms
{
uint x,y;
for(x=z;x>0;x--)
   for(y=110;y>0;y--);
}
uchar keyscan();       //键盘函数声明
void display(uchar aa);//显示函数声明
void main()            //主函数
{

while(1)
   {
    display(keyscan());
   }
}
void display(uchar aa)    //显示子程序
{
    //dula=1;
    //P0=table[aa-1];
    //dula=0;
            SBUF="table"[aa-1];
}
uchar keyscan()   //键盘扫描程序,取回一个键盘号
{
    duank="0xfe";
    temp="duank";
    temp="temp"&0xf0;
    while(temp!=0xf0)
     {
      delay(5);
      temp="duank";
      temp="temp"&0xf0;
      while(temp!=0xf0)
      {
       temp="duank";
      switch(temp)
       {
        case 0xee:num=1;
         break;
        case 0xde:num=2;
         break;
        case 0xbe:num=3;
         break;
        case 0x7e:num=4;
         break;
       }
      while(temp!=0xf0)
       {
        temp="duank";
        temp="temp"&0xf0;
       }
      }
     }

    duank="0xfd";
    temp="duank";
    temp="temp"&0xf0;
    while(temp!=0xf0)
     {
      delay(5);
      temp="duank";
      temp="temp"&0xf0;
      while(temp!=0xf0)
      {
       temp="duank";
      switch(temp)
       {
        case 0xed:num=5;
         break;
        case 0xdd:num=6;
         break;
        case 0xbd:num=7;
         break;
        case 0x7d:num=8;
         break;
       }
      while(temp!=0xf0)
       {
        temp="duank";
        temp="temp"&0xf0;
       }
      }
     }

    duank="0xfb";
    temp="duank";
    temp="temp"&0xf0;
    while(temp!=0xf0)
     {
      delay(5);
      temp="duank";
      temp="temp"&0xf0;
      while(temp!=0xf0)
      {
       temp="duank";
      switch(temp)
       {
        case 0xeb:num=9;
         break;
        case 0xdb:num=10;
         break;
        case 0xbb:num=11;
         break;
        case 0x7b:num=12;
         break;
       }
      while(temp!=0xf0)
       {
        temp="duank";
        temp="temp"&0xf0;
       }
      }
     }

    duank="0xf7";
    temp="duank";
    temp="temp"&0xf0;
    while(temp!=0xf0)
     {
      delay(5);
      temp="duank";
      temp="temp"&0xf0;
      while(temp!=0xf0)
      {
       temp="duank";
      switch(temp)
       {
        case 0xe7:num=13;
         break;
        case 0xd7:num=14;
         break;
        case 0xb7:num=15;
         break;
        case 0x77:num=16;
         break;
       }
      while(temp!=0xf0)
       {
        temp="duank";
        temp="temp"&0xf0;
       }
      }
     }
return num;

}