Zadanka z C - oceniane

/*
 * tset.c
 *
 * Created: 2019-04-09 10:12:18
 * Author : oem1
 */
/*
//zadanie 1
#include <avr/io.h>
#define F_CPU 16000000UL
#include <util/delay.h>
#include <avr/interrupt.h>

uint8_t seg7[]={0b11000000,
			0b11111001,
			0b10100100,
			0b10110000,
			0b10011001,
			0b10010010,
			0b10000010,
			0b11111000,
			0b10000000,
			0b10010000};

volatile uint8_t LED[4];

int main(void)
{
	TCCR0 |= (1 << WGM01 ) | (0 << WGM00 );
	TCCR0 |= (1 << CS02) | (0 << CS01) | (1 << CS00);
	OCR0=50;
	TIMSK |=(1 << OCIE0);
	sei();

	uint16_t sec = 1955;
	uint16_t tmp = sec;

	LED[3]=seg7[tmp/1000];
	tmp %= 1000;
	LED[2]=seg7[tmp/100];
	tmp %= 100;
	LED[1]=seg7[tmp/10];
	tmp %= 10;
	LED[0]=seg7[tmp];


	DDRB = 0x0F;
	DDRA = 0xFF;


	// Replace with your application code
	while (1)
	{


	}
}
ISR(TIMER0_COMP_vect)
{
	static uint8_t licznik = 0;

	PORTB |= 0x0F;
	PORTA = LED[licznik];
	PORTB &= ~(1 << licznik);

	if (++licznik>3){
		licznik = 0;
	}

}*/


//zadanie 2
#include <avr/io.h>
#define F_CPU 16000000UL
#include <util/delay.h>
#include <avr/interrupt.h>

uint8_t seg7[]={0b11000000,
                0b11111001,
                0b10100100,
                0b10110000,
                0b10011001,
                0b10010010,
                0b10000010,
                0b11111000,
                0b10000000,
                0b10010000};

volatile uint8_t LED[4];
volatile uint8_t key_state1 = 0;
volatile uint8_t key_state2 = 0;

int main(void)
{
    TCCR0 |= (1 << WGM01 ) | (0 << WGM00 );
    TCCR0 |= (1 << CS02) | (0 << CS01) | (1 << CS00);
    OCR0=50;
    TIMSK |=(1 << OCIE0);
    sei();

    uint16_t sec = 1234;

    DDRB = 0x0F;
    DDRA = 0xFF;

    DDRC = 0x00;
	PORTC = 0x03;

    // Replace with your application code
    while (1)
    {
       uint16_t tmp = sec;

       LED[3]=seg7[tmp/1000];
       tmp %= 1000;
       LED[2]=seg7[tmp/100];
       tmp %= 100;
       LED[1]=seg7[tmp/10];
       tmp %= 10;
       LED[0]=seg7[tmp];

	   if (key_state1 == 2){
		   sec = 1234;
		   key_state1 = 3;
	   }
	   else if(key_state2 == 2){
		   sec = 4567;
		   key_state2 = 3;
	   }

    }
}
ISR(TIMER0_COMP_vect)
{
    static uint8_t licznik = 0;

    PORTB |= 0x0F;
    PORTA = LED[licznik];
    PORTB &= ~(1 << licznik);

    if (++licznik>3){
        licznik = 0;
    }

   switch(key_state1){
	   case 0: if ((PINC & 0x01) == 0) key_state1 = 1;
	   break;
	   case 1: if ((PINC & 0x01) == 0) key_state1 = 2;
	   else key_state1 = 0;
	   break;
	   case 2: break;
	   case 3: if ((PINC & 0x01) != 0) key_state1 = 4;
	   break;
	   case 4: if ((PINC & 0x01) != 0) key_state1 = 0;
	   else key_state1 = 3;
	   break;
	   default:key_state1 = 0;
   }

   switch(key_state2){
	   case 0: if ((PINC & 0x02) == 0) key_state2 = 1;
	   break;
	   case 1: if ((PINC & 0x02) == 0) key_state2 = 2;
	   else key_state2 = 0;
	   break;
	   case 2: break;
	   case 3: if ((PINC & 0x02) != 0) key_state2 = 4;
	   break;
	   case 4: if ((PINC & 0x02) != 0) key_state2 = 0;
	   else key_state2 = 3;
	   break;
	   default:key_state2 = 0;
   }
}