/*
 * SevensegmentClock1wire.c
 *
 * Created: 29. 12. 2012. 1:35:23
 *  Author: Sale
 */

#ifndef F_CPU
#define F_CPU 1000000UL // 10 MHz
#endif

#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include "1wire.h"

const char SSEG[13] = { 0x3F,   0x21,   0x5B,   0x73,   0x65,   0x76,   0x7E,   0x23,   0x7F,   0x77,   0x00,       0x47,       0x1F};

//Konstante koje oznacavaju mesta (pinove) buffera tj. koji pin im daje clock ivicu
#ifndef BUFFERPINSANDTEMPSENS
#define BUFFERPINSANDTEMPSENS
#define BUFFSATIHIGH    PD5
#define BUFFSATILOW     PD4
#define BUFFMINHIGH     PD1
#define BUFFMINLOW      PD0
#define DS18B20PIN      PB7
#define SECPIN          PD6
#define HOURBUTTON      PD3
#define MINBUTTON       PD2
#endif


//Upisivanje vrednosti u zeljeni bafer
void SetBufferValue(int buffer, char bufferValue)
{
    PORTD   |= (1<<BUFFSATIHIGH) | (1<<BUFFSATILOW) | (1<<BUFFMINHIGH) | (1<<BUFFMINLOW);   //Stavi logicke 1 na CLK od bafera (podaci se upisuju kad dodje HIGH-to-LOW tranzicija)
    PORTB = bufferValue;
    PORTD |= (1<<buffer);   //buffer clock to HIGH
    _delay_us(50);
    PORTD &= ~(1<<buffer);  //HIGH-to-LOW transition
    _delay_us(50);
    PORTD |= (1<<buffer);   //buffer clock to HIGH again
    _delay_us(50);
}

void startUP() {
    cli();  //Disable Interrupts

    TIMSK   |= (1<<OCIE0A) | (1<<TOIE0);        //Enable OCIE0A: Timer/Counter0 Output Compare Match A Interrupt Enable

    DDRB    = 0xFF;
    PORTB   = 0x00;
    DDRD    = (0<<MINBUTTON) & (0<<HOURBUTTON);
    DDRD    |= (1<<BUFFSATIHIGH) | (1<<BUFFSATILOW) | (1<<BUFFMINHIGH) | (1<<BUFFMINLOW);   //Postavi pinove na kojima su baferi kao izlazne
    PORTD   |= (1<<BUFFSATIHIGH) | (1<<BUFFSATILOW) | (1<<BUFFMINHIGH) | (1<<BUFFMINLOW);   //Stavi logicke 1 na CLK od bafera (podaci se upisuju kad dodje HIGH-to-LOW tranzicija)

    //Postavi sve sedmosegmentne displeje na neku pocetnu vrednost
    SetBufferValue(BUFFSATIHIGH, SSEG[10]);
    SetBufferValue(BUFFSATILOW, SSEG[10]);
    SetBufferValue(BUFFMINHIGH, SSEG[11]);
    SetBufferValue(BUFFMINLOW, SSEG[12]);


    CLKPR = (1<<CLKPCE);    //Ukljuci prescale originalnog takta
    CLKPR |= (1<<CLKPS0); // Divide by 1


    TCCR0A  |= (1 << WGM01);                // Configure Timer 0 for CTC mode
    TCCR0B  |= (1 << CS01) | (1 << CS00);   //Prescaling the timer
    OCR0A   = 0xF9;                         // Set CTC compare value to 0.5Hz AVR clock, with pre-scaler of 1024
    TCNT0   = 0x06;                         //Podesi brojac odakle da pocne da broji



    sei();  //Enable Interrupts
}

void DisplayTemp() {

}

int main(void)
{
    int sseg_high=0, sseg_low=0;
   startUP();
    one_wire_init();

    while(1){
        if (one_wire_reset())
        {
            one_wire_write(ONE_WIRE_SKIP_ROM);  // Skip addressing, since we only have one device on the wire
            one_wire_write(0x44);               // Start conversion

            _delay_ms(750);                     // the maximum tCONV, when dealing with 12-bit resolution
            // (check the datasheet for your sensor)
            // 9 bit = 100ms, 10 bit = 190ms, 11 bit = 375ms

            if (one_wire_reset())
            {
                one_wire_write(ONE_WIRE_SKIP_ROM);  // Skip addressing, since we only have one device on the wire
                one_wire_write(0xBE);               // Read stuff

                int16_t temp = one_wire_read();     // read the LSB
                temp |= one_wire_read() << 8;       // read the MSB

                // and here you can do something with the temperature

                while(temp >=10) {
                    temp-=10;
                    sseg_high++;
                }
                sseg_low = temp;

                SetBufferValue(BUFFSATIHIGH, SSEG[sseg_high]);
                SetBufferValue(BUFFSATILOW, SSEG[sseg_low]);
            }
            // else the chip went away, wth?
        }
        // else we didn't get a presence pulse

        return 0;
    }
}