/*
1. Spojit 7seg, znamenke na PORTB, segmente na PORTD
2. Key1 datum, Key2 godina
 */
#define F_CPU 7372800UL

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

int main(void)
{
    DDRD = 0xff;
	PORTD = 0x00;

	DDRB = 0xf0;
	PORTB = 0x0f;

	uint8_t date[] = {0x5b, 0x5b, 0x3f, 0x4f};
	uint8_t year[] = {0x5b, 0x3f, 0x06, 0x07};
	uint8_t i, state = 0;

	while (1)
    {
		if(bit_is_clear(PINB, 0)){
			state = 1;
			PORTD = 0x00;
			PORTB = 0x03;
		}else if(bit_is_clear(PINB, 1)){
			state = 2;
			PORTD = 0x00;
			PORTB = 0x03;
		}

		if(state == 1){
			for(i = 0; i < 4; i++){
				PORTD = date[i];
				PORTB = _BV(4 + i);
				_delay_us(1000);
			}
		} else if(state == 2){
			for(i = 0; i < 4; i++){
				PORTD = year[i];
				PORTB = _BV(4 + i);
				_delay_us(1000);
			}
		}
		_delay_us(10); // za debounce
    }
}