#include <reg52.h>
#include<intrins.h>
#define uchar  unsigned char
#define uint   unsigned int
sbit CLK_164=P1^1;
sbit DAT_164=P1^2;

void HC164(uchar a)
{
     uchar i,temp;
     temp=~a;
     CLK_164=0;
     for(i=0;i<8;i++)
     {
       if(temp&0x80)
         DAT_164=1;
       else
         DAT_164=0;
         CLK_164=1;
         temp=_crol_(temp,1);
         CLK_164=0;
     }
}