A V R 的P B 口變速移位
#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();
}