/*
 * main.c
 *
 *  Created on: 30-10-2014
 *      Author: matt
 */
#include <avr/io.h>
#include <util/delay.h>

#include "1wire/ds18x20.h"


uint16_t DS18X20_temp_to_decicel(uint8_t subzero, uint8_t cel, uint8_t cel_frac_bits)
 {
    uint16_t h;
    uint8_t  i;
    uint8_t need_rounding[] = { 1, 3, 4, 6, 9, 11, 12, 14 };

    h = cel_frac_bits*DS18X20_FRACCONV/1000;
    h += cel*10;
    if (!subzero) {
        for (i=0; i<sizeof(need_rounding); i++) {
            if ( cel_frac_bits == need_rounding[i] ) {
                h++;
                break;
            }
        }
    }
    return h;
 }


int main( void ) {

	DDRB |= (1<<PB4);		//kierunek lini diody led jako wyjscie
	PORTB |= (1<<PB4);		//zalaczenie diody led - stan wysoki

    //DS18X20_start_meas( DS18X20_POWER_EXTERN, NULL );		//rozkaz wykonania pomiarow temperatury do wszystkich czujnikow na magistrali 1wire
	//_delay_ms(750);			//dokonanie konwersji
    uint16_t decicelsius;
    uint8_t subzero, cel, cel_frac_bits;
    double temp;

	while(1) {
      DS18X20_start_meas( DS18X20_POWER_PARASITE, NULL) ;
      _delay_ms( DS18B20_TCONV_12BIT );

      DS18X20_read_meas_single( DS18B20_ID, &subzero, &cel, &cel_frac_bits );
      decicelsius = DS18X20_temp_to_decicel(subzero, cel, cel_frac_bits);
      temp = decicelsius/10.0;
      if (temp >= 30) {
            DDRB |= (1<<PB4);
      }
      else if (temp < 29 && temp > 26) {
        DDRB ^= (1<<PB4);    //ustaw  pin PB4 na przeciwstawny do wyj?cia
      }
      else if (temp < 25) {
        DDRB &= ~(1<<PB4);
      }




	}

}