#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char

sbit address0=P1^4;
sbit address1=P1^5;
sbit address2=P1^6;
sbit address3=P1^7;

uchar code scan[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
uchar code word1[32]={0xFF,0xFF,0x88,0xC9,0xD1,0xD5,0x94,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,

0xFF,0xFF,0xF7,0xE3,0xDB,0xC1,0x18,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF}

uchar temp[8];

void LED();
//void Delay1();
void Delay2(uchar NUM);
void Lock();

void main()
{
 while(1)
 {
  LED();
 // Delay(110);
 }
}

void LED()
{
 uchar j,CYC;
 uchar m=8;
 uchar symbol;
 for(j=0;j<8;j++)
  temp[j]=word1[j];
 while(1)
 {
  for(CYC=100;CYC>0;CYC--)
   Lock();
 
  if(m>32)
   m-=32;
   symbol=word1[m];
  for(j=0;j<7;j++)
  {
   temp[j]=temp[j+1];
  }
   temp[7]=symbol;
   m++;
 
 }
}

void Lock()
{
  uchar i;
  for(i=0;i<8;i++)
  {
        address0=0;
  address1=0;
  address2=0;
  address3=0;
  P0=0xFF;
  address3=1;
  address3=0;

  address0=1;
  address1=0;
  address2=0;
  P0=temp[i];
  address3=1;
  address3=0;
 
         
  address0=0;
  address1=0;
  address2=0;
  address3=0;
  P0=scan[i];
  address3=1;
  address3=0;

  Delay2(50);
  }
 
}

//void Delay1()
//{
// uchar a,b;
// for(a=0;a<250;a++)
// for(b=0;b<110;b++);
//}

void Delay2(uchar NUM)
{
 while(NUM--);
}