74HC595锁存代码
#include<reg52.h>
sbit RCK=P3^5;
sbit SCK=P3^6;
sbit SER=P3^4;

void _74hc595_(unsigned char Byte)
{
unsigned char i;
for(i=0;i<8;i++)
{
SER=Byte&0x80;
SCK=1;
SCK=0;
}
RCK=1;
RCK=0;
}