monick.c

对利用595串行实现IO口扩展

//模拟串口LED6位显示已通过试验!
#include<reg51.h>
#include<stdio.h>
sbit P1_0=P1^0;
sbit P1_1=P1^1;
sbit P1_4=P1^4;
unsigned char a=0,b=0,c=0,d=0,e=0,f=0;
unsigned char x[]={0x03,0x9f,0x25,0x0d,0x99,0x49,0x41,0x1f,0x01,0x09};
delay()
{
 int l;
 char m;
 for (l=0;l<5000;l++)
 for (m=0;m<10;m++);
 }
 shushu()
{
 a=a++;
 if(a==10)
 {  a=0;
  b=++b;
  }
 if(b==10)
 {  b=0;
  c=++c;
  }
 if(c==10)
 {  c=0;
  d=++d;
  }
 if(d==10)
 {  d=0;
  e=++e;
  }
 if(e==10)
 {  e=0;
  f=++f;
  }
 if(f==10)
 {  f=0;
  }
}
 main()
 {
 while(1)
 {
 unsigned char y,z;
 shushu();
 for (y=0;y<=7;y++)
 {z=x[a]>>y;
  P1_0=z&0x01;
  P1_1=0;
  P1_1=1;
  }

 for (y=0;y<=7;y++)
 {z=x[b]>>y;
  P1_0=z&0x01;
  P1_1=0;
  P1_1=1;
  }
 for (y=0;y<=7;y++)
 {z=x[c]>>y;
  P1_0=z&0x01;
  P1_1=0;
  P1_1=1;
  }
 for (y=0;y<=7;y++)
 {z=x[d]>>y;
  P1_0=z&0x01;
  P1_1=0;
  P1_1=1;
  }
 for (y=0;y<=7;y++)
 {z=x[e]>>y;
  P1_0=z&0x01;
  P1_1=0;
  P1_1=1;
  }
 for (y=0;y<=7;y++)
 {z=x[f]>>y;
  P1_0=z&0x01;
  P1_1=0;
  P1_1=1;
  }
  P1_4=0;
  P1_4=1;
  delay();
  }
  }