#define THERM_DECIMAL_STEPS_12BIT 625 //.0625
#define THERM_CMD_CONVERTTEMP 0x44
#define THERM_CMD_RSCRATCHPAD 0xbe
#define THERM_CMD_WSCRATCHPAD 0x4e
#define THERM_CMD_CPYSCRATCHPAD 0x48
#define THERM_CMD_RECEEPROM 0xb8
#define THERM_CMD_RPWRSUPPLY 0xb4
#define THERM_CMD_SEARCHROM 0xf0
#define THERM_CMD_READROM 0x33
#define THERM_CMD_MATCHROM 0x55
#define THERM_CMD_SKIPROM 0xcc
#define THERM_CMD_ALARMSEARCH 0xec

#define THERM_PORT PORTC
#define THERM_DDR DDRC
#define THERM_PIN PINC
#define THERM_DQ PC5//PD7

#define THERM_INPUT_MODE() THERM_DDR&=~(1<<THERM_DQ)
#define THERM_OUTPUT_MODE() THERM_DDR|=(1<<THERM_DQ)
#define THERM_LOW() THERM_PORT&=~(1<<THERM_DQ)
#define THERM_HIGH() THERM_PORT|=(1<<THERM_DQ)


#define F_CPU 14745000UL 		 //Definovanie názvu F_CPU ako hodnotu 1000000HZ 
#include <util/delay.h>          //knižnica pre oneskorenia
#include <stdio.h>


uint8_t therm_reset(void){
uint8_t i;

//Pull line low and wait for 480uS

THERM_LOW();
THERM_OUTPUT_MODE();
_delay_us(490);

//Release line and wait for 60uS

THERM_INPUT_MODE();
_delay_us(60);

//Store line value and wait until the completion of 480uS period

i=(THERM_PIN & (1<<THERM_DQ));
_delay_us(480);

//Return the value read from the presence pulse (0=OK, 1=WRONG)

return i;
}
//--------------------------------------------
void therm_write_bit(uint8_t bit){

//Pull line low for 1uS

THERM_LOW();
THERM_OUTPUT_MODE();
_delay_us(5);//10

//If we want to write 1, release the line (if not will keep low)

if(bit) THERM_INPUT_MODE();

//Wait for 60uS and release the line

_delay_us(60);
THERM_INPUT_MODE();
};
//++++++++++++++++++++++++++++++++
uint8_t therm_read_bit(void){
uint8_t bit=0;

//Pull line low for 1uS

THERM_LOW();
THERM_OUTPUT_MODE();
_delay_us(1);

//Release line and wait for 14uS

THERM_INPUT_MODE();
_delay_us(10);

//Read line value

if(THERM_PIN&(1<<THERM_DQ)) bit=1;

//Wait for 45uS to end and return read value

_delay_us(55);
return bit;
} 
//-------------------------------------------------
uint8_t therm_read_byte(void){
uint8_t i=8, n=0;
while(i--){

//Shift one position right and store read value

n>>=1;
n|=(therm_read_bit()<<7);
}
return n;
}
void therm_write_byte(uint8_t byte){
uint8_t i=8;
while(i--){

//Write actual bit and shift one position right to make  the next bit ready

therm_write_bit(byte&1);
byte>>=1;
}
}
//***************************************************************

void cidlo1 (void)
{
therm_write_byte(0x10);
therm_write_byte(0xfe);
therm_write_byte(0x4d);
therm_write_byte(0x7b);
therm_write_byte(0x01);
therm_write_byte(0x08);
therm_write_byte(0x00);
therm_write_byte(0x7e);
}

void cidlo2 (void)
{
therm_write_byte(0x10);
therm_write_byte(0x72);
therm_write_byte(0x61);
therm_write_byte(0x7b);
therm_write_byte(0x01);
therm_write_byte(0x08);
therm_write_byte(0x00);
therm_write_byte(0x30);
}


void startprevodu(unsigned char adresa)
{

//Reset, skip ROM and start temperature conversion

therm_reset();
//therm_write_byte(THERM_CMD_SKIPROM);
therm_write_byte(THERM_CMD_MATCHROM);

if (adresa==1) cidlo1();
if (adresa==2) cidlo2();

therm_write_byte(THERM_CMD_CONVERTTEMP);
}

unsigned char vysledokprevodu(unsigned char adresa){

// Buffer length must be at least 12bytes long! ["+XXX.XXXX C"]

uint8_t temperature[2];
unsigned char tep;

//Wait until conversion is complete

while(!therm_read_bit());

//Reset, skip ROM and send command to read Scratchpad

therm_reset();
//therm_write_byte(THERM_CMD_SKIPROM);

therm_write_byte(THERM_CMD_MATCHROM);

if (adresa==1) cidlo1();
if (adresa==2) cidlo2();

therm_write_byte(THERM_CMD_RSCRATCHPAD);

//Read Scratchpad (only 2 first bytes)

temperature[0]=therm_read_byte();
temperature[1]=therm_read_byte();
therm_reset();

//Store temperature integer digits and decimal digits
//tv=temperature[0]>>1;
tep=temperature[0];

//if (adresa==1) tv=temperature[0];
//if (adresa==2) ti=temperature[0];

return tep;
}