#include<reg51.h>
sbit SCLK=P1^5;
sbit Din=P1^6;
sbit RCLK=P1^7;
#define uchar unsigned char
uchar movbuf[20];
uchar idata disbuf[20]={0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00};
uchar xdata display[8][20]={{0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff},
			               {0xe7,0xff,0xf7,0xff,0xe7,0xff,0xe7,0xff,0xf7,0xff,0xc3,0xff,0xe7,0xff,0xc3,0xff,0xe7,0xff,0xe7,0xff},
			               {0xdb,0xff,0xe7,0xff,0xdb,0xff,0xdb,0xff,0xe7,0xff,0xdf,0xff,0xdf,0xff,0xfb,0xff,0xdb,0xff,0xdb,0xff},
			               {0xdb,0xff,0xf7,0xff,0xfb,0xff,0xf7,0xff,0xd7,0xff,0xe7,0xff,0xc7,0xff,0xf7,0xff,0xe7,0xff,0xdb,0xff},
			               {0xdb,0xff,0xf7,0xff,0xf7,0xff,0xf7,0xff,0xd7,0xff,0xfb,0xff,0xdb,0xff,0xef,0xff,0xdb,0xff,0xe3,0xff},
				           {0xdb,0xff,0xf7,0xff,0xef,0xff,0xdb,0xff,0xc3,0xff,0xdb,0xff,0xdb,0xff,0xef,0xff,0xdb,0xff,0xfb,0xff},
				           {0xe7,0xff,0xe3,0xff,0xc3,0xff,0xe7,0xff,0xf7,0xff,0xe7,0xff,0xe7,0xff,0xef,0xff,0xe7,0xff,0xe7,0xff},
				           {0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff}};
void DATA_out(uchar dat);
void leftmove(void);
void delay(void);
void main()
{
  uchar i,j;
  uchar temp=0x80;
  while(1)
  {
 	 for(i=0;i<8;i++)
	  { DATA_out(temp);
	    for(j=0;j<4;j++)
		{DATA_out(display[i][j]);
		   }
	    RCLK=0;
		RCLK=1;
		temp>>=1;
		if(temp==0)
		temp=0x80;
		}
	  }
      
      leftmove();
	}
   
void DATA_out(uchar dat)
{  uchar i=0;
   for(i=0;i<8;i++)
   { Din=(bit)(dat&0x01);
     SCLK=0;
	 SCLK=1;
	 dat=dat>>1;
	 }
}
void leftmove()
{  uchar i,j;
   uchar A=0;
   for(i=0;i<8;i++)
   { for(j=0;j<20;j=j+2)
     {  movbuf[j]=display[i][j];
	    A=movbuf[j]&0x80;
		if(A) disbuf[j]|=0x01;
		movbuf[j]<<=1;
	  }
	 for(j=0;j<18;j++)
	     movbuf[j]|=disbuf[j+2];
	 movbuf[18]|=disbuf[0];
	 for(j=0;j<20;j=j+2)
	     display[i][j]=movbuf[j];
     for(j=0;j<20;j=j+2)
            disbuf[j]=0;
	}
}