blinky.c

来自「this program is used to blink led using 」· C语言 代码 · 共 25 行

// blinky.c
#include <avr/io.h>    	// Standard AVR header
#include <avr/delay.h> 	// Delay loop functions

int main(void) 
{
    int i;
	DDRB = 0xFF;    // PORTC is output 
	while (1) 
	{
	  for (i=1; i<=128; i*=2) 
	   {
	     PORTB = i;
		 _delay_loop_2(30000);
       }
	  for (i=128; i>1; i/=2) 
	   {
	     PORTB = i;
		 _delay_loop_2(30000);
	          
	   }  // end while
     }

}