проблема с большим количеством датчиков ds18b20

Войдите на сайт для отправки комментариев

Пт, 05/12/2014 - 14:07

artem0071992

Offline

Зарегистрирован: 05.12.2014

Здравствуйте, у меня проблема с монитором порта при использовании 20 датчиков ds18b20, монитор ничего не показывает, но если количество датчиков в программном коде уменьшить до 17, все работает отлично. Буду благодарен, если кто поможет с данной проблемой, прилагаю программный код на 20 датчиков, может проблема в компьютере потому что делаю с нетбука, при использовании этого кода через убунту при 18 датчиках монитор работал исправно, если больше, то либо пусто, либо символы непонятные

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

// Data wire is plugged into port 2 on the Arduino
#define ONE_WIRE_BUS 10
#define TEMPERATURE_PRECISION 9

// 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);

// arrays to hold device addresses
DeviceAddress Thermometer1, Thermometer2, Thermometer3, Thermometer4, 
Thermometer5, Thermometer6, Thermometer7, Thermometer8, Thermometer9,
Thermometer10, Thermometer11, Thermometer12, Thermometer13,
Thermometer14, Thermometer15, Thermometer16, Thermometer17,
Thermometer18, Thermometer19, Thermometer20;

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

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

  // locate devices on the bus
  Serial.print("Locating devices...");
  Serial.print("Found ");
  Serial.print(sensors.getDeviceCount(), DEC);
  Serial.println(" devices.");

  // report parasite power requirements
  Serial.print("Parasite power is: "); 
  if (sensors.isParasitePowerMode()) Serial.println("ON");
  else Serial.println("OFF");

  // assign address manually.  the addresses below will beed to be changed
  // to valid device addresses on your bus.  device address can be retrieved
  // by using either oneWire.search(deviceAddress) or individually via
  // sensors.getAddress(deviceAddress, index)
  //insideThermometer = { 0x28, 0x1D, 0x39, 0x31, 0x2, 0x0, 0x0, 0xF0 };
  //outsideThermometer   = { 0x28, 0x3F, 0x1C, 0x31, 0x2, 0x0, 0x0, 0x2 };

  // search for devices on the bus and assign based on an index.  ideally,
  // you would do this to initially discover addresses on the bus and then 
  // use those addresses and manually assign them (see above) once you know 
  // the devices on your bus (and assuming they don't change).
  // 
  // method 1: by index
  if (!sensors.getAddress(Thermometer1, 0)) Serial.println("Unable to find address for Device 0"); 
  if (!sensors.getAddress(Thermometer2, 1)) Serial.println("Unable to find address for Device 1"); 
  if (!sensors.getAddress(Thermometer3, 2)) Serial.println("Unable to find address for Device 2");
  if (!sensors.getAddress(Thermometer4, 3)) Serial.println("Unable to find address for Device 3");
  if (!sensors.getAddress(Thermometer5, 4)) Serial.println("Unable to find address for Device 4");
  if (!sensors.getAddress(Thermometer6, 5)) Serial.println("Unable to find address for Device 5"); 
  if (!sensors.getAddress(Thermometer7, 6)) Serial.println("Unable to find address for Device 6"); 
  if (!sensors.getAddress(Thermometer8, 7)) Serial.println("Unable to find address for Device 7");
  if (!sensors.getAddress(Thermometer9, 8)) Serial.println("Unable to find address for Device 8");
  if (!sensors.getAddress(Thermometer10, 9)) Serial.println("Unable to find address for Device 9");
  if (!sensors.getAddress(Thermometer11, 10)) Serial.println("Unable to find address for Device 10"); 
  if (!sensors.getAddress(Thermometer12, 11)) Serial.println("Unable to find address for Device 11"); 
  if (!sensors.getAddress(Thermometer13, 12)) Serial.println("Unable to find address for Device 12");
  if (!sensors.getAddress(Thermometer14, 13)) Serial.println("Unable to find address for Device 13");
  if (!sensors.getAddress(Thermometer15, 14)) Serial.println("Unable to find address for Device 14");
  if (!sensors.getAddress(Thermometer16, 15)) Serial.println("Unable to find address for Device 15"); 
  if (!sensors.getAddress(Thermometer17, 16)) Serial.println("Unable to find address for Device 16"); 
  if (!sensors.getAddress(Thermometer18, 17)) Serial.println("Unable to find address for Device 17");
  if (!sensors.getAddress(Thermometer19, 18)) Serial.println("Unable to find address for Device 18");
  if (!sensors.getAddress(Thermometer20, 19)) Serial.println("Unable to find address for Device 19");
  
  
  
  // method 2: search()
  // search() looks for the next device. Returns 1 if a new address has been
  // returned. A zero might mean that the bus is shorted, there are no devices, 
  // or you have already retrieved all of them.  It might be a good idea to 
  // check the CRC to make sure you didn't get garbage.  The order is 
  // deterministic. You will always get the same devices in the same order
  //
  // Must be called before search()
  //oneWire.reset_search();
  // assigns the first address found to insideThermometer
  //if (!oneWire.search(insideThermometer)) Serial.println("Unable to find address for insideThermometer");
  // assigns the seconds address found to outsideThermometer
  //if (!oneWire.search(outsideThermometer)) Serial.println("Unable to find address for outsideThermometer");

  // show the addresses we found on the bus
  Serial.print("Device 0 Address: ");
  printAddress(Thermometer1);
  Serial.println();

  Serial.print("Device 1 Address: ");
  printAddress(Thermometer2);
  Serial.println();
  
  Serial.print("Device 2 Address: ");
  printAddress(Thermometer3);
  Serial.println();
  
  Serial.print("Device 3 Address: ");
  printAddress(Thermometer4);
  Serial.println();
  
  Serial.print("Device 4 Address: ");
  printAddress(Thermometer5);
  Serial.println();
  
  Serial.print("Device 5 Address: ");
  printAddress(Thermometer6);
  Serial.println();

  Serial.print("Device 6 Address: ");
  printAddress(Thermometer7);
  Serial.println();
  
  Serial.print("Device 7 Address: ");
  printAddress(Thermometer8);
  Serial.println();
  
  Serial.print("Device 8 Address: ");
  printAddress(Thermometer9);
  Serial.println();
  
  Serial.print("Device 9 Address: ");
  printAddress(Thermometer10);
  Serial.println();
  Serial.print("Device 10 Address: ");
  printAddress(Thermometer11);
  Serial.println();

  Serial.print("Device 11 Address: ");
  printAddress(Thermometer12);
  Serial.println();
  
  Serial.print("Device 12 Address: ");
  printAddress(Thermometer13);
  Serial.println();
  
  Serial.print("Device 13 Address: ");
  printAddress(Thermometer14);
  Serial.println();
  
  Serial.print("Device 14 Address: ");
  printAddress(Thermometer15);
  Serial.println();
  Serial.print("Device 15 Address: ");
  printAddress(Thermometer16);
  Serial.println();

  Serial.print("Device 16 Address: ");
  printAddress(Thermometer17);
  Serial.println();
  
  Serial.print("Device 17 Address: ");
  printAddress(Thermometer18);
  Serial.println();
  
  Serial.print("Device 18 Address: ");
  printAddress(Thermometer19);
  Serial.println();
  
  Serial.print("Device 19 Address: ");
  printAddress(Thermometer20);
  Serial.println();
  
  // set the resolution to 9 bit
  sensors.setResolution(Thermometer1, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer2, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer3, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer4, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer5, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer6, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer7, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer8, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer9, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer10, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer11, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer12, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer13, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer14, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer15, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer16, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer17, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer18, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer19, TEMPERATURE_PRECISION);
  sensors.setResolution(Thermometer20, TEMPERATURE_PRECISION);
  
  
  Serial.print("Device 0 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer1), DEC); 
  Serial.println();

  Serial.print("Device 1 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer2), DEC); 
  Serial.println();
  
  Serial.print("Device 2 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer3), DEC); 
  Serial.println();
  
  Serial.print("Device 3 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer4), DEC); 
  Serial.println();
  
  Serial.print("Device 4 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer5), DEC); 
  Serial.println();
  
  Serial.print("Device 5 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer6), DEC); 
  Serial.println();

  Serial.print("Device 6 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer7), DEC); 
  Serial.println();
  
  Serial.print("Device 7 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer8), DEC); 
  Serial.println();
  
  Serial.print("Device 8 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer9), DEC); 
  Serial.println();
  
  Serial.print("Device 9 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer10), DEC); 
  Serial.println();
  
  Serial.print("Device 10 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer11), DEC); 
  Serial.println();

  Serial.print("Device 11 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer12), DEC); 
  Serial.println();
  
  Serial.print("Device 12 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer13), DEC); 
  Serial.println();
  
  Serial.print("Device 13 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer14), DEC); 
  Serial.println();
  
  Serial.print("Device 14 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer15), DEC); 
  Serial.println();
  
  Serial.print("Device 15 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer16), DEC); 
  Serial.println();

  Serial.print("Device 16 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer17), DEC); 
  Serial.println();
  
  Serial.print("Device 17 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer18), DEC); 
  Serial.println();
  
  Serial.print("Device 18 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer19), DEC); 
  Serial.println();
  
  Serial.print("Device 19 Resolution: ");
  Serial.print(sensors.getResolution(Thermometer20), DEC); 
  Serial.println();
}

// function to print a device address
void printAddress(DeviceAddress deviceAddress)
{
  for (uint8_t i = 0; i < 8; i++)
  {
    // zero pad the address if necessary
    if (deviceAddress[i] < 16) Serial.print("0");
    Serial.print(deviceAddress[i], HEX);
  }
}

// function to print the temperature for a device
void printTemperature(DeviceAddress deviceAddress)
{
  float tempC = sensors.getTempC(deviceAddress);
  Serial.print("Temp C: ");
  Serial.print(tempC);
  Serial.print(" Temp F: ");
  Serial.print(DallasTemperature::toFahrenheit(tempC));
}

// function to print a device's resolution
void printResolution(DeviceAddress deviceAddress)
{
  Serial.print("Resolution: ");
  Serial.print(sensors.getResolution(deviceAddress));
  Serial.println();    
}

// main function to print information about a device
void printData(DeviceAddress deviceAddress)
{
  Serial.print("Device Address: ");
  printAddress(deviceAddress);
  Serial.print(" ");
  printTemperature(deviceAddress);
  Serial.println();
}

void loop(void)
{ 
  // call sensors.requestTemperatures() to issue a global temperature 
  // request to all devices on the bus
  Serial.print("Requesting temperatures...");
  sensors.requestTemperatures();
  Serial.println("DONE");

  // print the device information
  printData(Thermometer1);
  printData(Thermometer2);
  printData(Thermometer3);
  printData(Thermometer4);
  printData(Thermometer5);
  printData(Thermometer6);
  printData(Thermometer7);
  printData(Thermometer8);
  printData(Thermometer9);
  printData(Thermometer10);
  printData(Thermometer11);
  printData(Thermometer12);
  printData(Thermometer13);
  printData(Thermometer14);
  printData(Thermometer15);
  printData(Thermometer16);
  printData(Thermometer17);
  printData(Thermometer18);
  printData(Thermometer19);
  printData(Thermometer20);
delay(5000);
}

Пт, 05/12/2014 - 14:13

KVadik

Offline

Зарегистрирован: 15.06.2014

Вы что про циклы не слышали? :)

У библиотеки OneWire есть пример опрашивающий все DS18B20 на шине, попробуйте его. Он работает?

#include <OneWire.h>

// OneWire DS18S20, DS18B20, DS1822 Temperature Example
//
// http://www.pjrc.com/teensy/td_libs_OneWire.html
//
// The DallasTemperature library can do all this work for you!
// http://milesburton.com/Dallas_Temperature_Control_Library

OneWire  ds(10);  // on pin 10 (a 4.7K resistor is necessary)

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

void loop(void) {
  byte i;
  byte present = 0;
  byte type_s;
  byte data[12];
  byte addr[8];
  float celsius, fahrenheit;
  
  if ( !ds.search(addr)) {
    Serial.println("No more addresses.");
    Serial.println();
    ds.reset_search();
    delay(250);
    return;
  }
  
  Serial.print("ROM =");
  for( i = 0; i < 8; i++) {
    Serial.write(' ');
    Serial.print(addr[i], HEX);
  }

  if (OneWire::crc8(addr, 7) != addr[7]) {
      Serial.println("CRC is not valid!");
      return;
  }
  Serial.println();
 
  // the first ROM byte indicates which chip
  switch (addr[0]) {
    case 0x10:
      Serial.println("  Chip = DS18S20");  // or old DS1820
      type_s = 1;
      break;
    case 0x28:
      Serial.println("  Chip = DS18B20");
      type_s = 0;
      break;
    case 0x22:
      Serial.println("  Chip = DS1822");
      type_s = 0;
      break;
    default:
      Serial.println("Device is not a DS18x20 family device.");
      return;
  } 

  ds.reset();
  ds.select(addr);
  ds.write(0x44, 1);        // start conversion, with parasite power on at the end
  
  delay(1000);     // maybe 750ms is enough, maybe not
  // we might do a ds.depower() here, but the reset will take care of it.
  
  present = ds.reset();
  ds.select(addr);    
  ds.write(0xBE);         // Read Scratchpad

  Serial.print("  Data = ");
  Serial.print(present, HEX);
  Serial.print(" ");
  for ( i = 0; i < 9; i++) {           // we need 9 bytes
    data[i] = ds.read();
    Serial.print(data[i], HEX);
    Serial.print(" ");
  }
  Serial.print(" CRC=");
  Serial.print(OneWire::crc8(data, 8), HEX);
  Serial.println();

  // Convert the data to actual temperature
  // because the result is a 16 bit signed integer, it should
  // be stored to an "int16_t" type, which is always 16 bits
  // even when compiled on a 32 bit processor.
  int16_t raw = (data[1] << 8) | data[0];
  if (type_s) {
    raw = raw << 3; // 9 bit resolution default
    if (data[7] == 0x10) {
      // "count remain" gives full 12 bit resolution
      raw = (raw & 0xFFF0) + 12 - data[6];
    }
  } else {
    byte cfg = (data[4] & 0x60);
    // at lower res, the low bits are undefined, so let's zero them
    if (cfg == 0x00) raw = raw & ~7;  // 9 bit resolution, 93.75 ms
    else if (cfg == 0x20) raw = raw & ~3; // 10 bit res, 187.5 ms
    else if (cfg == 0x40) raw = raw & ~1; // 11 bit res, 375 ms
    //// default is 12 bit resolution, 750 ms conversion time
  }
  celsius = (float)raw / 16.0;
  fahrenheit = celsius * 1.8 + 32.0;
  Serial.print("  Temperature = ");
  Serial.print(celsius);
  Serial.print(" Celsius, ");
  Serial.print(fahrenheit);
  Serial.println(" Fahrenheit");
}

Пт, 05/12/2014 - 14:13

artem0071992

Offline

Зарегистрирован: 05.12.2014

Извините, ошибся, при 16 датчиках работает исправно, при использовании 17, датчики начинают показывать неправильную температуру

Пт, 05/12/2014 - 14:17

artem0071992

Offline

Зарегистрирован: 05.12.2014

Спасибо большое, не слышал)

Пт, 05/12/2014 - 23:31

Thorn

Offline

Зарегистрирован: 07.11.2014

Поразительно, ещё паруд ней наза ничего ненайти было про множество датчиков на одной шине и на тебе и мне помогли и тут код шикарный, скопипастил конечное

http://arduino.ru/forum/proekty/dva-datchika-ds18b20-i-vyvod-na-lcd

Пт, 05/12/2014 - 23:55

KVadik

Offline

Зарегистрирован: 15.06.2014

Thorn пишет:

Так это родной пример из библиотки OneWire. Сегодня пятница все добрые :).

Arduino.ru

Регистрация новых пользователей и создание новых тем теперь только на новом форуме https://forum.arduino.ru

проблема с большим количеством датчиков ds18b20