_43_CTC_AtmelStudio7_Code.c

gistfile1.txt

/* Project Ardu_Serie # 43
 * Working w/CTC Mode Part I - Atmega328p IC - Arduino MC
 *
 * Use: TIMER2 
 *
 * Objective: We need to flash an LED every 100 ms (10 Hertz).
 */ 
 
#include <avr/io.h>

									
void timer2_init()
{
									
	TCCR2A |= (1 << WGM21) | (0 << WGM20);
	TCCR2B |= (0 << WGM22) | (1 << CS22) | (1 << CS21) | (1 << CS20);
	
									
	TCNT2 = 0;
	
									
	OCR2A = 156;
}

int main(void)
{
									
	DDRB |= (1 << PINB5);
	
									
	timer2_init();
	
									
	while(1)
	{
									
		if (TIFR2 & (1 << OCF2A)) 
		{
			PORTB ^= (1 << PINB5); 
		}
		
									
		TIFR2 |= (1 << OCF2A);
		
									
	}
}