#define F_CPU 14745600UL
#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdio.h>
#include <string.h>

unsigned int ubrr = F_CPU/16/9600-1;
unsigned int x=0;
volatile unsigned long long taktis = 0;

void USART_Init( unsigned int ubrr)
{
/* Set baud rate */
UBRR0H = (unsigned char)(ubrr>>8);
UBRR0L = (unsigned char)ubrr;
/* Enable receiver and transmitter */
UCSR0B = (1<<RXEN)|(1<<TXEN);
/* Set frame format: 8data, 2stop bit */
UCSR0C = (1<<USBS)|(3<<UCSZ0);
}

void USART_Transmit( char data2 )
{
/* Wait for empty transmit buffer */
while ( !( UCSR0A & (1<<UDRE)) )
;
/* Put data into buffer, sends the data */
UDR0= data2;
}

void USART_String(char data1[]){
x=0;
            while(x < strlen(data1)){

            USART_Transmit(data1[x]);
                x++;
                }
                }

unsigned char USART_Receive( void )
{
/* Wait for data to be received */
while ( !(UCSR0A & (1<<RXC)) )
;
/* Get and return received data from buffer */
return UDR0;
}


void EEPROM_write(unsigned int Address, unsigned char Data)
{
/*
Wait for completion of previous write */
while(EECR & (1<<EEWE));
/*
Set up address and data registers */
EEAR = Address;
EEDR = Data;
/*
Write logical one to EEMWE */
EECR |= (1<<EEMWE);
/*
Start eeprom
write by setting EEWE */
EECR |= (1<<EEWE);
}


unsigned char EEPROM_read(unsigned int Address)
{
/*
Wait for completion of previous write */
while(EECR & (1<<EEWE));
/*
Set up address register */
EEAR = Address;
/*
Start
eeprom
read by writing EERE */
EECR |= (1<<EERE);
/*
Return data from data register */
return EEDR;}


    ISR(TIMER0_OVF_vect)
    {
    taktis = taktis + 2048; //TO DO
    }

    char time[] ="00:00:00";


int main(void)
{
    unsigned char *sP, s = 51;
    unsigned char *mP, m = 10;
    unsigned char *hP, h = 10;

    sP=&s;
    mP=&m;
    hP=&h;

    //sprintf(time,"%02d:%02d:%02d",h,m,s);


    USART_Init(ubrr);




    //uzstada pinus uz izvadi
    DDRD =  (1 << DDD7) | (1 << DDD6) | (1 << DDD5) |  (1 << DDD4) | (1 << DDD3) | (1 << DDD2) |   (1<<DDD1) | (1<<DDD0) ;
    // 0xFF
    PORTD = 0;
    //uzstadam takts avotu / 8
    //uzstadam taimeri
    TCCR0 = (0 << CS02) | (0 << CS01) | (1 << CS00);
    TIMSK = (1 <<TOIE0); //0x01
    //atlaujam taimera parpildes partraukumu



    unsigned long long parbaude = F_CPU*8/3600;
    sei();
            //EEPROM_write(50, 00);

            //EEPROM_write(51, 00);

            //EEPROM_write(52, 00);

s=EEPROM_read(50);
m=EEPROM_read(51);
h=EEPROM_read(52);

while(1){



    if(taktis>=parbaude){
    taktis=0;
            s++;
            if(s>=60){
            s=0;
            m++;
            }
            if(m>=60){
            h++;
            m=0;
            }

        EEPROM_write(50, *sP);

        EEPROM_write(51, *mP);

        EEPROM_write(52, *hP);

        sprintf(time,"%02d:%02d:%02d",*hP,*mP,*sP);
        USART_String(time);

}
}
    }