//led顯示程序
//流水燈顯示
#include<iom16v.h>
#define uchar unsigned char 
#define uint unsigned int 

//延時(shí)函數(shù)
void s_ms(unsigned int t)
{
    for(;t>1;t--)
    {
    }
}

//主函數(shù)
main()
{
uchar led=1;
DDRD=0xff;         //端口A為輸出
PORTD=0xff;        //關(guān)閉所有LED
while(1)
     {
	  PORTD=~led;  //端口輸出led值
	  led=led<<1;  //向左移動(dòng)一位
	  s_ms(65535); //延時(shí)
	  s_ms(65535);
	  s_ms(65535);
	  s_ms(65535);
	  //PORTG=0xff;
	  if(led==0)   //完成8位后重新開(kāi)始
         {
	      led=1;
	     }  
	  }
}