單片機矩陣鍵盤顯示在數碼管上面

ID:877522 · 發表于 2021-2-1 13:50

矩陣鍵盤顯示在數碼管上面

04-02.zip (800 Bytes, 下載次數: 10)

04-01.zip (815 Bytes, 下載次數: 9)

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit d1=P1^0;
sbit key1=P3^4;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code table []={0x3f,0x06,
0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(uint z);
uchar num,temp;
void display (uchar num)
      {
      P0=table[num];
      dula=1;
      dula=0;
      }

void matrixkeyscan()
      {
      uchar temp,key;
      P3=0xfe;
      temp=P3;
      temp=temp&0xf0;
      {
         delay(10);
         temp=P3;
         temp=temp&0xf0;
            if(temp!=0xf0)
         {
            temp=P3;
            switch(temp)
         {
         case 0xee:
            key=0;
            break;
         case 0xde:
               key=1;
               break;
         case 0xbe:
            key=2;
            break;
         case 0x7e:
            key=3;
            break;
            }
         while (temp!=0xf0)
               {
               temp=P3;
               temp=temp&0xf0;
                  }
            display(key);
               }
   }
P3=0xfd;
      temp=P3;
      temp=temp&0xf0;
      {
         delay(10);
         temp=P3;
         temp=temp&0xf0;
            if(temp!=0xf0)
         {
            temp=P3;
            switch(temp)
         {
         case 0xed:
            key=4;
            break;
         case 0xdd:
               key=5;
               break;
         case 0xbd:
            key=6;
            break;
         case 0x7d:
            key=7;
            break;
            }
         while (temp!=0xf0)
               {
               temp=P3;
               temp=temp&0xf0;
                  }
            display(key);
               }
   }
P3=0xfb;
      temp=P3;
      temp=temp&0xf0;
      {
         delay(10);
         temp=P3;
         temp=temp&0xf0;
            if(temp!=0xf0)
         {
            temp=P3;
            switch(temp)
         {
         case 0xeb:
            key=8;
            break;
         case 0xdb:
               key=9;
               break;
         case 0xbb:
            key=10;
            break;
         case 0x7b:
            key=11;
            break;
            }
         while (temp!=0xf0)
               {
               temp=P3;
               temp=temp&0xf0;
                  }
            display(key);
               }
   }
P3=0xf7;
      temp=P3;
      temp=temp&0xf0;
      {
         delay(10);
         temp=P3;
         temp=temp&0xf0;
            if(temp!=0xf0)
         {
            temp=P3;
            switch(temp)
         {
         case 0xe7:
            key=12;
            break;
         case 0xd7:
               key=13;
               break;
         case 0xb7:
            key=14;
            break;
         case 0x77:
            key=15;
            break;
            }
         while (temp!=0xf0)
               {
               temp=P3;
               temp=temp&0xf0;
                  }
            display(key);
               }
   }
  }

void main()
      {
      P0=0;
      dula=1;
         dula=0;

         P0=0xc0;
         wela=1;
            wela=0;
            while(1)
            {
               matrixkeyscan();
            }
      }

void  delay (uint z)
{
            uint x,y;
            for(x=z;x>0;x--)
               for(y=110;y>0;y--);
}

//矩陣鍵盤顯示0-16 方式2

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單片機矩陣鍵盤顯示在數碼管上面