shaibuttonuser18.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

      //hold container reference and address
      if(!setiButton18(owc))
         throw new OneWireException("Invalid SHA user");
   }

   /**
    * <P>Creates a valid SHAiButtonUser object.  If the service file,
    * whose name is taken from the <code>SHAiButtonCopr</code>, is not
    * found on the user iButton, a OneWireException is thrown with the
    * message "Invalid SHA user".</P>
    *
    * @param coprBindCode The Coprocessor Bind Code without the user-specific
    *        information.
    * @param fileName The file name of the account file
    * @param fileNameExt The file extenstion of the account file
    * @param owc The DS1963S iButton that this object will refer to.
    *
    * @throws OneWireIOException on a 1-Wire communication error such as
    *         reading an incorrect CRC from a 1-Wire device.  This could be
    *         caused by a physical interruption in the 1-Wire Network due to
    *         shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.
    * @throws OneWireException on a communication or setup error with the 1-Wire
    *         adapter
    *
    * @see #SHAiButtonUser18(SHAiButtonCopr,OneWireContainer18,boolean,byte[])
    * @see #SHAiButtonUser18(SHAiButtonCopr)
    */
   public SHAiButtonUser18(byte[] coprBindCode,
                           byte[] fileName, int fileNameExt,
                           OneWireContainer18 owc)
      throws OneWireException, OneWireIOException
   {
      //save a copy of the binding code
      System.arraycopy(coprBindCode, 0, this.fullBindCode, 0, 7);
      System.arraycopy(this.fullBindCode,4,
                       this.fullBindCode,12, 3);


      //create string representation of service filename
      System.arraycopy(fileName, 0, this.serviceFile, 0, 4);
      this.strServiceFilename = new String(fileName) + "."
                                + (int)fileNameExt;

      //hold container reference and address
      if(!setiButton18(owc))
         throw new OneWireException("Invalid SHA user");
   }

   /**
    * <P>Creates a mostly unitialized SHAiButtonUser object.  This constructor
    * merely copies the coprocessors 7 byte binding code into a local cache
    * and stores the name of the account service file used for all user
    * iButtons.</P>
    *
    * <P>Since this constructor leaves data unitialized, you should be very
    * careful with the use of it.  It is expected that after calling this
    * constructor, the user will call <code>setiButton</code> to finish the
    * initialization process.  On memory-starved platforms, this should help
    * optimize memory usage.</P>
    *
    * @param copr The SHAiButtonCopr to which the user object is tied.  This
    *        Coprocessor contains the necessary binding code and service
    *        filename, necessary for both locating a user and recreating his
    *        unique secret.
    *
    * @see #SHAiButtonUser18(SHAiButtonCopr,OneWireContainer18,boolean,byte[])
    * @see #SHAiButtonUser18(SHAiButtonCopr)
    */
   public SHAiButtonUser18(SHAiButtonCopr copr)
   {
      //save a copy of the binding code
      copr.getBindCode(this.fullBindCode,0);
      System.arraycopy(this.fullBindCode,4,
                       this.fullBindCode,12, 3);


      //create string representation of service filename
      copr.getFilename(this.serviceFile,0);
      this.strServiceFilename = new String(this.serviceFile) + "."
                                + (int)copr.getFilenameExt();
   }

   // ***********************************************************************
   // Modifier Methods
   //  - setiButton is the only essential modifier.  It updates all
   //    data members based on consquences of the account file alone.
   // ***********************************************************************

   /**
    * <P>Modifies this SHA iButton so that it refers to another DS1963S
    * container.  This function only copies the reference to the
    * OneWireContainer, copes the reference to it's 1-Wire address, and
    * then asserts that the iButton contains a valid acccount info file
    * associated with the system.</P>
    *
    * @param owc The <code>OneWireContainer18</code> this object will refer to.
    *
    * @return <code>true</code> if a valid account service file exists on
    *         this <code>OneWireContainer18</code>.
    *
    * @throws OneWireIOException on a 1-Wire communication error such as
    *         reading an incorrect CRC from a 1-Wire device.  This could be
    *         caused by a physical interruption in the 1-Wire Network due to
    *         shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.
    * @throws OneWireException on a communication or setup error with the 1-Wire
    *         adapter
    */
   public synchronized boolean setiButton18(OneWireContainer18 owc)
      throws OneWireException, OneWireIOException
   {
      //hold container reference
      this.ibc = owc;

      //and address
      this.address = owc.getAddress(); //getAddress() doesn't malloc!

      //clear account information
      this.accountPageNumber = -1;

      //make sure account info is properly setup
      if(!checkAccountPageInfo(owc))
         return false;

      //setup the fullBindCode with rest of info
      this.fullBindCode[4] = (byte)this.accountPageNumber;
      System.arraycopy(this.address,0,
                       this.fullBindCode,5,7);


      //\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\
      if(DEBUG)
      {
         IOHelper.writeLine("------------------------------------");
         IOHelper.writeLine("Loaded User");
         IOHelper.writeLine("address");
         IOHelper.writeBytesHex(owc.getAddress());
         IOHelper.writeLine("accountPageNumber: " + accountPageNumber);
         IOHelper.writeLine("serviceFilename: " + strServiceFilename);
         IOHelper.writeLine("------------------------------------");
      }
      //\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\

      return true;
   }

   /**
    * <P>Modifies this SHA iButton so that it refers to another 1963S.
    * If this object already has an appropriate instance of OneWireContainer,
    * that instance is updated with the new address.</P>
    *
    * @param adapter The adapter that the device can be found on.
    * @param address The address of the 1-Wire device
    *
    * @return <code>true</code> if a valid account service file exists on
    *         this <code>OneWireContainer18</code>.
    *
    * @throws OneWireIOException on a 1-Wire communication error such as
    *         reading an incorrect CRC from a 1-Wire device.  This could be
    *         caused by a physical interruption in the 1-Wire Network due to
    *         shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.
    * @throws OneWireException on a communication or setup error with the 1-Wire
    *         adapter
    */
   public synchronized boolean setiButtonUser(DSPortAdapter adapter,
                                              byte[] address)
      throws OneWireException, OneWireIOException
   {
      if(this.ibc==null)
         this.ibc = new OneWireContainer18();

      this.ibc.setupContainer(adapter,address);

      if(this.forceOverdrive)
         this.ibc.setSpeed(DSPortAdapter.SPEED_OVERDRIVE, false);

      return setiButton18(this.ibc);
   }

   /**
    * <P>Modifies this SHA iButton so that it refers to another device.
    * If this object does not already has an appropriate instance of
    * OneWireContainer, it returns false immediately, because there is
    * no adapter info available.  Otherwise, it reuses the same adapter.</P>
    *
    * @param address The address of the 1-Wire device
    *
    * @return <code>true</code> if a valid account service file exists on
    *         this <code>OneWireContainer18</code>.
    *
    * @throws OneWireIOException on a 1-Wire communication error such as
    *         reading an incorrect CRC from a 1-Wire device.  This could be
    *         caused by a physical interruption in the 1-Wire Network due to
    *         shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.
    * @throws OneWireException on a communication or setup error with the 1-Wire
    *         adapter
    */
   public synchronized boolean setiButtonUser(byte[] address)
      throws OneWireException, OneWireIOException
   {
      if(this.ibc==null)
         return false;

      this.ibc.setupContainer(this.ibc.getAdapter(),address);

      if(this.forceOverdrive)
         this.ibc.setSpeed(DSPortAdapter.SPEED_OVERDRIVE, false);

      return setiButton18(this.ibc);
   }

   // ***********************************************************************
   // End Modifier Methods
   // ***********************************************************************


   /**
    * <P>Returns the value of the write cycle counter for the
    * page where the account data is stored.  If the write
    * cycle counter has ever been retrieved, this returns the
    * cached value.  Otherwise, this method reads the value
    * from the part.</P>
    *
    * @return the value of the write cycle counter for the
    *         account data page.
    *
    * @throws OneWireIOException on a 1-Wire communication error such as
    *         reading an incorrect CRC from a 1-Wire device.  This could be
    *         caused by a physical interruption in the 1-Wire Network due to
    *         shorts or a newly arriving 1-Wire device issuing a 'presence pulse'.
    * @throws OneWireException on a communication or setup error with the 1-Wire
    *         adapter
    */
   public synchronized int getWriteCycleCounter()
      throws OneWireException, OneWireIOException
   {
      if(this.writeCycleCounter<0)
      {
         //need to get the writeCycleCounter.
         int wcc = -1;

         //don't worry, this should not happen in the critical path.
         //so malloc-ing doesnt really matter
         byte[] wcc_buffer = new byte[32];

         //read the page, 19, containing the write-cycle counters
         this.ibc.readMemoryPage(19, wcc_buffer, 0);

         //get the offset into page for wcc
         int offset = (this.accountPageNumber & 7) << 2;

         //convert the four bytes, lsb first, into an int
         wcc = (wcc_buffer[offset+3]&0x0ff);
         wcc = (wcc << 8) | (wcc_buffer[offset+2]&0x0ff);
         wcc = (wcc << 8) | (wcc_buffer[offset+1]&0x0ff);
         wcc = (wcc << 8) | (wcc_buffer[offset]&0x0ff);

         this.writeCycleCounter = wcc;
      }
      return this.writeCycleCounter;
   }

   /**
    * Returns <code>true</code> if this buttons account data is stored
    * on a page that has a write cycle counter.
    *
    * @return <code>true</code> if account page has write cycle counter.
    */