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495 kaklik 1 
/*********************************************
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* vim: set sw=8 ts=8 si :
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* Author: Guido Socher, Copyright: GPL
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* This program is to test the led connected to
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* PC5.
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* See http://linuxfocus.org/English/November2004/
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* for details.
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* Chip type           : ATMEGA644
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* Clock frequency     : Internal clock 1 Mhz (factory default)
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*********************************************/
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#include <avr/io.h>
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#include <inttypes.h>
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#define F_CPU 8000000UL  // 8 MHz
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#include <util/delay.h>
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#define LED PINC5
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{
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	// accurate and not so much compiler dependent
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	// as self made code.
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	while (ms)
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	{
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		_delay_ms(0.96);
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		ms--;
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	}
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}
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{
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          /* INITIALIZE */
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          /* enable PC5 as output */
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          DDRC|= (1<<LED);
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	   * This can also be written as _BV(PC5)*/
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          while (1) {
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                      /* led on, pin=0 */
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                      PORTC|= (1<<LED);
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                      cekej(100);
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                      /* set output to 5V, LED off */
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                      PORTC &= ~(1<<LED);
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                      cekej(1000);
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	}
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	  return(0);
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}
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