#include <avr/io.h>
#include <util/delay.h>

// Macro
#define BEEPON 127
#define BEEPOFF 0
#define TRUE 1
#define FALSE 0
#define STDBEEP OCR1B = BEEPON; _delay_ms(500); OCR1B=BEEPOFF;

static void init(void);

int main(void)
{
	init();
	int done = FALSE;
	while(1)
	{
		if(PINB & 0x02)
		{
			while (!done)
			{
				STDBEEP;
				_delay_ms(1000);

				STDBEEP;
				_delay_ms(750);

				STDBEEP;
				_delay_ms(500);

				STDBEEP;
				_delay_ms(250);

				STDBEEP;
				_delay_ms(100);

				STDBEEP;
				_delay_ms(100);

				STDBEEP;
				_delay_ms(50);

				STDBEEP;
				_delay_ms(25);

				// Last beep
				OCR1B = BEEPON;
				_delay_ms(1000);
				OCR1B = BEEPOFF;
				done = TRUE;
			}
		}
	}
	return 1;
}

static void init(void)
{
	// Data Direction
	// PB1(Pin 6): PWM Output
	// PB2(Pin 7): Button Input
	DDRB = 0x01;
	PORTB = 0x00;

	// PWM Setup
	TCCR0A = _BV(WGM00) | _BV(COM0A1) | _BV(COM0B1);
	TCCR0B |= _BV(CS01);
}