jibcardterminal.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

      if (driver == null)
         return false;

      OneWireContainer16 owc16 = javabuttons[slot_id];

      if (owc16 == null)
      {
         return false;
      }
      try
      {
          driver.beginExclusive(true);
          boolean present = owc16.isPresent();
          driver.endExclusive();
          return present;
      }
      catch(OneWireException owe)
      {
          return false;
      }
   }

   /**
    * Gets the CardID from the Java Powered <u>i</u>Button on the specified slot.
    *
    * @param int the id of the slot
    * @return the CardID object containing the ATR of the Java Powered <u>i</u>Button.
    * @throws CardTerminalException
    */
   public CardID getCardID(int slot_id) throws CardTerminalException
   {
      com.dalsemi.onewire.debug.Debug.debug("getCardID called with slot = " + slot_id);

      byte[]    ATR = getCachedATR(slot_id);

      if (ATR != null)
      {
         System.out.println("Returning cached ATR");

         return new CardID((opencard.core.terminal.Slot) slots.elementAt(slot_id),
                           ATR);
      }
      else
      {
         return this.internalReset(slot_id, 500);
      }
   }

   /**
    * Get the CardID from the Java Powered <u>i</u>Button on the specified slot.  This
    * method will timeout after the specified timeout period.
    *
    * @param slot_id - the id of the slot
    * @param ex_timeout - the period of time to wait before timing out.
    *
    * @return the CardID object containing the ATR of the Java Powered <u>i</u>Button
    * @throws CardTerminalException
    */
   public CardID getCardID(int slot_id,
                           int ex_timeout) throws CardTerminalException
   {
      byte[]    ATR = getCachedATR(slot_id);

      if (ATR != null)
      {
         com.dalsemi.onewire.debug.Debug.debug("Returning cached ATR");

         return new CardID((opencard.core.terminal.Slot) slots.elementAt(slot_id),
                           ATR);
      }
      else
      {
         return this.internalReset(slot_id, ex_timeout);
      }
   }

   /*
    * Kluge to allow getting the ATR from the button when the button
    * is not physically connected to the reader.
    */

   /*
    * Get the stored ATR array of bytes and return a copy to the caller.
    */
   private byte[] getCachedATR(int slot_id)
   {
      com.dalsemi.onewire.debug.Debug.debug("Getting ATR for: " + slot_id);

      byte[]    ATR = (byte[]) ATRArray[slot_id];

      if (ATR != null)
      {
         ATR = (byte[]) ATR.clone();
      }

      return ATR;
   }

   /*
    * Set the stored ATR array of bytes.
    */
   private void setCachedATR(int slot_id, byte[] atr)
   {
      com.dalsemi.onewire.debug.Debug.debug("Setting ATR for slot: " + slot_id);

      ATRArray[slot_id] = atr.clone();
   }

   /**
    *
    */
   protected CardID internalReset(int slot_id,
                                  int ms) throws CardTerminalException
   {
      // driver must be installed
      if (driver == null)
         throw new CardTerminalException("Driver is not installed");

      try
      {
         OneWireContainer16 owc16 = javabuttons[slot_id];
         driver.beginExclusive(true);
         byte[] atr = owc16.getATR().getData();
         driver.endExclusive();

/*
         setCachedATR(slot_id, ATR);
*/
         CardID CardAtr = new CardID((opencard.core.terminal.Slot) slots.elementAt(slot_id), atr);

         return CardAtr;
      }
      catch (Exception e)
      {
         throw new CardTerminalException("Can not reset the card: " + e);
      }
   }

   /**
    * Method called by the OpenCard internals to send an APDU to the
    * Java Powered <u>i</u>Button.
    *
    * @param int the slot number of the Java Powered <u>i</u>Button
    * @param opencard.core.terminal.CommandAPDU message to send to the <u>i</u>Button
    * @param int time to give the <u>i</u>Button to run
    *
    * @return message returned by the <u>i</u>Button
    * @throws CardTerminalException on communications error with the <u>i</u>Button
    */
   protected synchronized ResponseAPDU internalSendAPDU(int slot_id, CommandAPDU capdu, int ms) throws CardTerminalException
   {
      // driver must be installed
      if (driver == null)
          throw new CardTerminalException("Driver is not installed");

      synchronized (driver)
      {
            try
            {
                OneWireContainer16 owc16 = javabuttons[slot_id];
                com.dalsemi.onewire.container.CommandAPDU ds_capdu = new com.dalsemi.onewire.container.CommandAPDU(capdu.getBytes());

                /* this strange little code contraption is due to something in the new jibcomm
                 * layer...it expects a value between 0-15, which translates into the runTime
                 * like so...
                 * Input I, I>=0 and I<=15
                 *
                 *   runTime = (62.5 + 250 * I) ms
                 * so we want I
                 *   runTime - 62.5 = 250 * I
                 *   (runTime - 62.5) / 250 = I
                 *   (runTime*2 - 125) / 500 = I
                 *
                 * Rather than use flaoting point, I just used a shift so I could do all int's
                 *
                 * enjoy
                 */
                int time = ((ms << 1) - 125) / 500;
                if (time < 0)
                    time = 0;
                else if (time > 15)
                    time = 15;

                driver.beginExclusive(true);
                //hack!!! this makes it slow...
                driver.setSpeed(DSPortAdapter.SPEED_REGULAR);
                com.dalsemi.onewire.container.ResponseAPDU ds_rapdu = owc16.sendAPDU(ds_capdu, time);
                driver.endExclusive();

                ResponseAPDU rapdu = new ResponseAPDU(ds_rapdu.getBytes());
                return rapdu;
            }
            catch (Exception e)
            {
               throw new CardTerminalException("Can not communicate with the card " + e.getMessage());
            }
      }
   }


   /**
    * Method called to poll the One-Wire bus for the presence of a Java Powered <u>i</u>Button.
    *
    * @throws CardTerminalException on communications error with the <u>i</u>Button
    */
   public synchronized void poll() throws CardTerminalException
   {
      if (firstPoll)
      {
          firstPoll = false;
          return;
      }

//System.out.print("<po");
      //first put all the button addresses in buttonaddresses
      for (int i=0;i<buttonaddresses.length;i++)
      {
          added[i] = removed[i] = false;
          if (javabuttons[i]!=null)
          {
              buttonaddresses[i] = javabuttons[i].getAddressAsLong();

              //System.out.println("Setting button address "+i+" to "+buttonaddresses[i]);
          }
          else
              buttonaddresses[i] = 0;
      }

      try
      {
//System.out.print("<");
        driver.beginExclusive(true);
//System.out.print(">");

        driver.targetFamily(JIB_FAMILY_CODES);
        driver.setSpeed(DSPortAdapter.SPEED_REGULAR);
        driver.reset();
        driver.setSearchAllDevices();

        boolean next = driver.findFirstDevice();
        while (next)
        {
            OneWireContainer16 owc16 = (OneWireContainer16)driver.getDeviceContainer();

            add(owc16);

            next = driver.findNextDevice();
        }
        driver.endExclusive();
      }
      catch(Exception e)
      {
        driver.endExclusive();
        System.out.println("Exception: "+e.toString());
        e.printStackTrace();
      }


      //now remove the old parts
      for (int i=0;i<buttonaddresses.length;i++)
      {
          if (buttonaddresses[i] != 0)
          {
              com.dalsemi.onewire.debug.Debug.debug("Removing card at slot "+i+", val = "+buttonaddresses[i]);

              hash.remove(new Long(javabuttons[i].getAddressAsLong()));
              javabuttons[i] = null;
              //cardRemoved(i);
              removed[i] = true;
          }
      }

      //do all the notification here outside of the polling loop
      for (int i=0;i<added.length;i++)
      {
        if (removed[i])
            cardRemoved(i);
        if (added[i])
            cardInserted(i);
      }
//System.out.print("ll>");

   }

   private void add(OneWireContainer16 jibButton)
   {
      if (!hash.containsKey(new Long(jibButton.getAddressAsLong())))
      {
        com.dalsemi.onewire.debug.Debug.debug("ADDING "+jibButton.getAddressAsString());
        for (int i=0;i<javabuttons.length;i++)
        {
            if (javabuttons[i]==null)
            {
                //add it here
                javabuttons[i] = jibButton;
                hash.put(new Long(jibButton.getAddressAsLong()),jibButton);
                buttonaddresses[i] = 0;
                //cardInserted(i);
                added[i] = true;
                return;
            }
        }
      }
      else //its in the hashtable, so fix up the buttonaddresses[] thing
      {
          for (int i=0;i<javabuttons.length;i++)
          {
              if (buttonaddresses[i]==jibButton.getAddressAsLong())
              {
                  buttonaddresses[i] = 0;
                  return;
              }
          }
      }

   }



}