8515portbledshift.c

ATMEL AVR 单片机开发套件和大量C和ASM代码工程

#include <io8515.h>      
#define BIT(x) (1<<(x))  
void delay(void)
{
 unsigned char i,j;
     for (i=1;i;i++)
         for(j=1;j;j++);
}
void led_pb(void)
{
 unsigned char i;
 DDRB=0xff;
 for (i=0;i<8;i++)
   {
    PORTB=~BIT(i);
    delay();
   }
}
void main (void)
{
  while (1)
    led_pb();
}