thermal.java

这是一个以JAVA编写的程序,本人还没有试过,是一个简单的温度控制系统

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 *
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 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
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 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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 * OTHER DEALINGS IN THE SOFTWARE.
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package com.dalsemi.onewire.application.tag;

import com.dalsemi.onewire.adapter.DSPortAdapter;
import com.dalsemi.onewire.container.*;
import com.dalsemi.onewire.OneWireException;
import java.util.Vector;


/**
 * This class provides a default object for the Thermal type of a tagged 1-Wire device.
 */
public class Thermal
   extends    TaggedDevice
   implements TaggedSensor
{

   /**
    * Creates an object for the device.
    */
   public Thermal()
   {
      super();
   }

   /**
    * Creates an object for the device with the supplied address and device type connected
    * to the supplied port adapter.
    * @param adapter The adapter serving the sensor.
    * @param netAddress The 1-Wire network address of the sensor.
    */
   public Thermal(DSPortAdapter adapter, String netAddress)
   {
      super(adapter, netAddress);
   }

   /**
    * The readSensor method returns a temperature in degrees Celsius 
    *
    * @param--none.
    *
    * @return String temperature in degrees Celsius
    */
   public String readSensor()
   throws OneWireException
   {
      String returnString = "";
      double theTemperature;
      TemperatureContainer tc = (TemperatureContainer) DeviceContainer;

      // read the device first before getting the temperature
      byte[] state = tc.readDevice();
  
      // perform a temperature conversion
      tc.doTemperatureConvert(state);

      // read the result of the conversion
      state = tc.readDevice();

      // extract the result out of state
      theTemperature = tc.getTemperature(state);
      //theTemperature = (double)(Math.round(theTemperature * 100))/100; // avoid Math for TINI?
      theTemperature = roundDouble(theTemperature * 100)/100;
      // make string out of results
      returnString = theTemperature + " 癈"; 
      
      return returnString;
   }

   /**
    * The roundDouble method returns a double rounded to the 
    * nearest digit in the "ones" position. 
    *
    * @param--double
    *
    * @return double rounded to the nearest digit in the "ones"
    * position.
    */
   private double roundDouble (double d)
   {
      return (double)((int)(d+((d > 0)? 0.5 : -0.5)));
   }
}