代码：

#include <mega16.h>// Declare your global variables here
#define hc165_clk PORTB.0
#define hc165_lp PORTB.1
#define hc165_out PINB.2unsigned char read_hc165(void)
{unsigned char data=0,i,temp=0x80;hc165_lp=0;hc165_lp=1; for(i=0;i<=7;i++){if(hc165_out)data|=temp;hc165_clk=1;temp=temp>>1;hc165_clk=0;}return data;
}
void main(void)
{
// Declare your local variables herePORTA=0XFF;DDRA=0XFF;PORTB=0X06;DDRB=0X03;while (1){// Place your code herePORTA=~read_hc165();}
}

仿真效果图：