#include <OneWire.h>

/* 
 * Получаем температуру от датчиков серии DS18x20 
 */


// Поддерживаемые датчики
#define DS18S20_ID 0x10
#define DS18B20_ID 0x28


// Линия 1-Wire будет на pin 2
OneWire  ds(2);

void setup(void)  {
  Serial.begin(9600);
}


void loop(void) {
  byte i;
  byte present = 0;
  byte data[12];
  byte addr[8];
  
  if (!ds.search(addr)) {
      ds.reset_search();
      return;
  }
  
  if (OneWire::crc8( addr, 7) != addr[7]) {
      Serial.print("CRC is not valid!\n");
      return;
  }
  
  if (addr[0] != DS18S20_ID && addr[0] != DS18B20_ID) {
      Serial.print("Device is not a DS18x20 family device.\n");
      return;
  }
  
  ds.reset();
  ds.select(addr);
  
  // Запускаем конвертацию
  ds.write(0x44, 1);
  
  // Подождем...
  delay(1000);
  
  present = ds.reset();
  ds.select(addr); 

  // Считываем ОЗУ датчика  
  ds.write(0xBE); 

   // Обрабатываем 9 байт
  for ( i = 0; i < 9; i++) {
    data[i] = ds.read();
  }
  
  // Высчитываем температуру :)
  int HighByte, LowByte, TReading, Tc_100, SignBit, Whole, Fract;
  LowByte = data[0];
  HighByte = data[1];

   TReading = (HighByte << 8) + LowByte;
   
   // Проверяем дубак там или нет
   SignBit = TReading & 0x8000; 
   
   // Если на улице дубак :)
   if (SignBit) { 
       TReading = (TReading ^ 0xffff) + 1; 
   }
   
   // Умножаем на (100 * 0.0625) или 6.25
   Tc_100 = (6 * TReading) + TReading / 4;

   // Отделяем целые от дробных чисел
   Whole = Tc_100 / 100;
   Fract = Tc_100 % 100;

   Serial.print("Temperature: ");

   // Если на улице дубак напишем минус перед цифрами :)
   if (SignBit) { 
      Serial.print("-");
   }
   
   Serial.print(Whole);
   Serial.print(".");
   
   if (Fract < 10) {
      Serial.print("0");
   }
   
   Serial.print(Fract);
   Serial.print("\n");
}

#include <avr/interrupt.h>
#include <DallasTemperature.h>

int rdigs[] = {9, 10, 11, 12};
int rsegs[] = { 1, 2, 3, 4, 5, 6, 7, 8}; 
bool digits[15][8] = {
  {1, 1, 1, 1, 1, 1, 0, 0},  //0
  {0, 1, 1, 0, 0, 0, 0, 0},  //1
  {1, 1, 0, 1, 1, 0, 1, 0},  //2
  {1, 1, 1, 1, 0, 0, 1, 0},  //3
  {0, 1, 1, 0, 0, 1, 1, 0},  //4
  {1, 0, 1, 1, 0, 1, 1, 0},  //5
  {1, 0, 1, 1, 1, 1, 1, 0},  //6
  {1, 1, 1, 0, 0, 0, 0, 0},  //7
  {1, 1, 1, 1, 1, 1, 1, 0},  //8
  {1, 1, 1, 1, 0, 1, 1, 0},  //9
  {0, 0, 0, 0, 0, 0, 0, 0},  //none
  {0, 0, 0, 0, 0, 0, 1, 0},  //-
  {1, 0, 0, 1, 1, 1, 1, 1},  //E.
  {0, 0, 0, 0, 1, 0, 1, 1},  //r.
  {1, 1, 1, 1, 1, 1, 0, 1}   //0.
}; 
int cdigit = 0;
int odigit = 0;
int displ[] = {0, 8, 4, 9};

DallasTemperature tempSensor;

void displayTemperature(float term);
void cleardisplay();
void displayErr(int err);


// Подпрограмма прерывания
ISR(TIMER2_OVF_vect) {
//  return;
  int dig;
  if(cdigit < 0 || cdigit > 3) cdigit = 0;
  digitalWrite(rdigs[odigit], LOW);
  dig = abs(displ[cdigit]);
  if(displ[cdigit] < 0) digits[dig][7] = 1;
  else digits[dig][7] = 0;
  for(int i = 0; i < 8; i++) digitalWrite(rsegs[i], !(digits[dig][i]));
  digitalWrite(rdigs[cdigit], HIGH);
  odigit = cdigit;
  cdigit++;
  TCNT2 = 0;
}

void setup() {
  for(int i = 0; i<4; i++) {
    pinMode(rdigs[i], OUTPUT);
    digitalWrite(rdigs[i], LOW);
  }
  for(int i = 0; i<8; i++) {
    pinMode(rsegs[i], OUTPUT);
    digitalWrite(rsegs[i], LOW);
  }
  //Установка делителей таймера
  TCCR2A = 0;
  TCCR2B |= 1<<CS22;
  TCCR2B &= ~((1<<CS21) | (0<<CS20));
  TCCR2B &= ~((1<<WGM21) | (1<<WGM20));
  //Timer2 Overflow Interrupt Enable  
  TIMSK2 |= 1<<TOIE2; 
  //reset timer
  TCNT2 = 0;
  cleardisplay();
  tempSensor.begin(0);
}

void loop() {
  byte i;
  byte present = 0;
  byte addr[8];

  switch(tempSensor.isValid()) {
        case 1:
            //Invalid CRC
            displayErr(-1);
            tempSensor.reset(); // Attempts to redetect IC
            return;
        case 2:
            //Not a valid device
            displayErr(-2);
	    tempSensor.reset(); // Attempts to redetect IC
            return;
  }
  displayTemperature(tempSensor.getTemperature());
}

void displayTemperature(float term) {
  int bdis[4] = {10, 10, 10, 10};
  int cycle;
  int temp = 100*abs(term);

  cycle = 2;
  while(temp > 0) {
    for(int i=0; i<3; i++) bdis[i] = bdis[i+1];
    bdis[3] = temp % 10;
    if(cycle==0) {
      if(bdis[3]==0) bdis[3] = -14;
      else bdis[3] *= -1;
    }
    temp /= 10;
    cycle--;
  }
  if(term<0) {
    for(int i=0; i<3; i++) bdis[i] = bdis[i+1];
    bdis[3] = 11;
    if(cycle==0) bdis[3] *= -1;
  }
  for(int i=0; i<4; i++) displ[i] = bdis[i];
}


void cleardisplay() {
  for(int i=0; i<4; i++) displ[i] = 10;
}

void displayErr(int err) {
  displ[0] = err;
  displ[1] = -13;
  displ[2] = -13;
  displ[3] = -12;
}

#include <OneWire.h>
#include <DallasTemperature.h>

// Data wire is plugged into pin 2 on the Arduino
#define ONE_WIRE_BUS 2

// Setup a oneWire instance to communicate with any OneWire devices (not just Maxim/Dallas temperature ICs)
OneWire oneWire(ONE_WIRE_BUS);

// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire);

void setup(void)
{
  // start serial port
  Serial.begin(9600);
  Serial.println("Dallas Temperature IC Control Library Demo");

  // Start up the library
  sensors.begin();
}


void loop(void)
{ 
  // call sensors.requestTemperatures() to issue a global temperature 
  // request to all devices on the bus
  Serial.print("Requesting temperatures...");
  sensors.requestTemperatures(); // Send the command to get temperatures
  Serial.println("DONE");
  
  Serial.print("Temperature for Device 1 is: ");
  Serial.print(sensors.getTempCByIndex(0)); // Why "byIndex"? You can have more than one IC on the same bus. 0 refers to the first IC on the wire
  
}

R=56 55 55 55 55 55 55 F5 CRC is not valid!
R=56 55 55 55 55 55 55 75 CRC is not valid!

D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:66:24: error: WConstants.h: No such file or directory
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp: In constructor 'OneWire::OneWire(uint8_t)':
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:75: error: 'digitalPinToPort' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:76: error: 'digitalPinToBitMask' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:77: error: 'portOutputRegister' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:78: error: 'portInputRegister' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:79: error: 'portModeRegister' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp: In member function 'uint8_t OneWire::reset()':
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:97: error: 'INPUT' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:97: error: 'pinMode' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:100: error: 'delayMicroseconds' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:101: error: 'digitalRead' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:103: error: 'digitalWrite' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:104: error: 'OUTPUT' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:105: error: 'delayMicroseconds' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp: In member function 'void OneWire::write_bit(uint8_t)':
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:125: error: 'delayMicroseconds' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp: In member function 'uint8_t OneWire::read_bit()':
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:140: error: 'delayMicroseconds' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp: In member function 'void OneWire::write(uint8_t, uint8_t)':
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:163: error: 'INPUT' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:163: error: 'pinMode' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:164: error: 'digitalWrite' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp: In member function 'void OneWire::depower()':
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:203: error: 'INPUT' was not declared in this scope
D:\Arduino IDE\arduino-1.0.5\libraries\OneWire\OneWire.cpp:203: error: 'pinMode' was not declared in this scope