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

#ifndef _BV
#define _BV(bit)        (1<<(bit))
#endif

#ifndef sbi
#define sbi(reg,bit)    reg |= (_BV(bit))
#endif

#ifndef cbi
#define cbi(reg,bit)    reg &= ~(_BV(bit))
#endif

#ifndef tbi
#define tbi(reg,bit)    reg ^= (_BV(bit))
#endif

#define INPUT_1_PIN PD6
#define INPUT_2_PIN PD5
#define OUTPUT_PIN PD4

int main() {
    
    DDRD |= (1 << OUTPUT_PIN); 
    DDRD &= ~(1 << INPUT_1_PIN); 
   DDRD &= ~(1 << INPUT_2_PIN); 

 
    PORTD |= (1 << INPUT_1_PIN); 
   PORTD |= (1 << INPUT_2_PIN); 

    int Q_state = 0;

    while (1) {
        // Odczytanie stanów wejść
        int J_state = (PIND & (1 << INPUT_1_PIN)) == 0;
        int K_state = (PIND & (1 << INPUT_2_PIN)) == 0;

        // Logika przerzutnika JK
        if (J_state == 0 && K_state == 0) {
            
        } else if (J_state == 0 && K_state == 1) {
            Q_state = 1; 
        } else if (J_state == 1 && K_state == 0) {
            Q_state = 0; 
        } else if (J_state == 1 && K_state == 1) {
            Q_state = !Q_state; 
        }

        // Ustawienie stanu wyjścia
        if (Q_state) {
            PORTD |= (1 << OUTPUT_PIN); 
        } else {
            PORTD &= ~(1 << OUTPUT_PIN); 
        }
    }

    return 0;
}