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標題: 單片機4*4矩陣按鍵代碼超級好用 [打印本頁]

作者: 848590507 時間: 2021-8-28 23:42
標題: 單片機4*4矩陣按鍵代碼超級好用
#include<reg52.h>
#define uc unsigned char;
#define ui unsigned int;
ui x,y,z;
void delay(z)
{
      for(x=z;x>0;x--)
   for(y=100;y>0;y--);
}
uc ge,shi,wei;
unsigned char code num[]=
{
      0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x5e,0x79,0x71,0x40,0x00
};
ui va=16,val,vah;
void keyscan()
{
P1=0x0f;
      if(P1!=0x0f)
      {
      delay(20);
            switch(P1)
            {
                     case 0x07:
                     val=0;break;
            case 0x0b:
                     val=1;break;
            case 0x0d:
                     val=2;break;
            case 0x0e:
                     val=3;break;
            };
            P1=~P1;
            P1=P1&0xf0;
            switch(P1)
            {
                     case 0x70:
                     vah=0;break;
            case 0xb0:
                     vah=1;break;
            case 0xd0:
                     vah=2;break;
            case 0xe0:
                     vah=3;break;
            };
            while(P1!=P1);
            va=vah*4+val;
      }
}void main()
{
      while(1)
      {
keyscan();
               P0=num[va];
               P2=0xdf;
      }
}

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