include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#define INT_0 PB2 // IK sygnal
#define SPEAKER PB4 // speaker
#define LED PB0 // blue led
#define Transistor PB3 // transistor
#define set_bit(port,mask) ((port)|=_BV(mask))
#define clear_bit(port,mask) ((port)&=~_BV(mask))
#define reverse_bit(port,mask) ((port)^=_BV(mask))
const unsigned char data_comp = 0x57;
unsigned char data_rec=0, F_speaker;
void Beep(unsigned int tone);
// Timer 0 overflow interrupt service routine
ISR(TIM0_OVF_vect)
{
// Reinitialize Timer 0 value
TCNT0=0xF5;
// mycode code here
reverse_bit(PORTB,SPEAKER);
}
