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com.dalsemi.onewire.container
Class OneWireContainer02

java.lang.Object
  |
  +--com.dalsemi.onewire.container.OneWireContainer
        |
        +--com.dalsemi.onewire.container.OneWireContainer02
public class OneWireContainer02
extends OneWireContainer

1-Wire® container that encapsulates the functionality of the 1-Wire family type 02 (hex), Dallas Semiconductor part number: DS1991, MultiKey.

This iButton is primarily used as a minimal security read/write portable memory device.

Features

Memory

All memory is accessed through read/write routines, no MemoryBank classes are used.

Alternate Names

DataSheets

http://pdfserv.maxim-ic.com/arpdf/DS1991.pdf
http://pdfserv.maxim-ic.com/arpdf/DS1425.pdf

Version:
0.00, 28 Aug 2000
Author:
DS,GH

Constructor Summary
OneWireContainer02()
          Create an empty container.
OneWireContainer02(DSPortAdapter sourceAdapter, byte[] newAddress)
          Create a container with a provided adapter object and the address of the iButton or 1-Wire device.
OneWireContainer02(DSPortAdapter sourceAdapter, long newAddress)
          Create a container with a provided adapter object and the address of the iButton or 1-Wire device.
OneWireContainer02(DSPortAdapter sourceAdapter, String newAddress)
          Create a container with a provided adapter object and the address of the iButton or 1-Wire device.
 
Method Summary
 void copyScratchpad(int key, byte[] passwd, int blockNum)
          Writes the data from the scratchpad to the specified block or blocks.
 String getAlternateNames()
          Retrieves the alternate Dallas Semiconductor part numbers or names.
 String getDescription()
          Retrieves a short description of the function of the 1-Wire device type.
 String getName()
          Retrieves the Dallas Semiconductor part number of the 1-Wire device as a String.
 byte[] readScratchpad()
          Reads the entire scratchpad.
 void readSubkey(byte[] data, int key, byte[] passwd)
          Reads the subkey requested with the given key name and password.
 byte[] readSubkey(int key, byte[] passwd)
          Reads the subkey requested with the given key name and password.
 void writePassword(int key, byte[] oldName, byte[] newName, byte[] newPasswd)
          Writes a new identifier and password to the secure subkey iButton
 void writeScratchpad(int addr, byte[] data)
          Writes the data to the scratchpad from the given address.
 void writeSubkey(int key, int addr, byte[] passwd, byte[] data)
          Writes new data to the secure subkey
 
Methods inherited from class com.dalsemi.onewire.container.OneWireContainer
doSpeed, equals, getAdapter, getAddress, getAddressAsLong, getAddressAsString, getMaxSpeed, getMemoryBanks, hashCode, isAlarming, isPresent, setSpeed, setupContainer, setupContainer, setupContainer, toString
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 

Constructor Detail

OneWireContainer02

public OneWireContainer02()
Create an empty container. Must call setupContainer before using this new container.

This is one of the methods to construct a container. The others are through creating a OneWireContainer with parameters.

See Also:
OneWireContainer02(DSPortAdapter,byte[]), OneWireContainer02(DSPortAdapter,long), OneWireContainer02(DSPortAdapter,String), OneWireContainer.setupContainer(DSPortAdapter,byte[]), OneWireContainer.setupContainer(DSPortAdapter,long), OneWireContainer.setupContainer(DSPortAdapter,String)

OneWireContainer02

public OneWireContainer02(DSPortAdapter sourceAdapter,
                          byte[] newAddress)
Create a container with a provided adapter object and the address of the iButton or 1-Wire device.

This is one of the methods to construct a container. The other is through creating a OneWireContainer with NO parameters.

Parameters:
sourceAdapter - adapter object required to communicate with this iButton.
newAddress - address of this 1-Wire device
See Also:
OneWireContainer02(), Address

OneWireContainer02

public OneWireContainer02(DSPortAdapter sourceAdapter,
                          long newAddress)
Create a container with a provided adapter object and the address of the iButton or 1-Wire device.

This is one of the methods to construct a container. The other is through creating a OneWireContainer with NO parameters.

Parameters:
sourceAdapter - adapter object required to communicate with this iButton.
newAddress - address of this 1-Wire device
See Also:
OneWireContainer02(), Address

OneWireContainer02

public OneWireContainer02(DSPortAdapter sourceAdapter,
                          String newAddress)
Create a container with a provided adapter object and the address of the iButton or 1-Wire device.

This is one of the methods to construct a container. The other is through creating a OneWireContainer with NO parameters.

Parameters:
sourceAdapter - adapter object required to communicate with this iButton.
newAddress - address of this 1-Wire device
See Also:
OneWireContainer02(), Address
Method Detail

getName

public String getName()
Description copied from class: OneWireContainer
Retrieves the Dallas Semiconductor part number of the 1-Wire device as a String. For example 'Crypto iButton' or 'DS1992'.
Overrides:
getName in class OneWireContainer
Following copied from class: com.dalsemi.onewire.container.OneWireContainer
Returns:
1-Wire device name

getAlternateNames

public String getAlternateNames()
Description copied from class: OneWireContainer
Retrieves the alternate Dallas Semiconductor part numbers or names. A 'family' of 1-Wire Network devices may have more than one part number depending on packaging. There can also be nicknames such as 'Crypto iButton'.
Overrides:
getAlternateNames in class OneWireContainer
Following copied from class: com.dalsemi.onewire.container.OneWireContainer
Returns:
1-Wire device alternate names

getDescription

public String getDescription()
Description copied from class: OneWireContainer
Retrieves a short description of the function of the 1-Wire device type.
Overrides:
getDescription in class OneWireContainer
Following copied from class: com.dalsemi.onewire.container.OneWireContainer
Returns:
device functional description

writeScratchpad

public void writeScratchpad(int addr,
                            byte[] data)
                     throws OneWireIOException,
                            OneWireException,
                            IllegalArgumentException
Writes the data to the scratchpad from the given address.
Parameters:
addr - address to begin writing. Must be between 0x00 and 0x3F.
data - data to write.
Throws:
IllegalArgumentException - If address is out of range, or data is to long for scratchpad
OneWireIOException - If device is not found on the 1-Wire network
OneWireException - on a communication or setup error with the 1-Wire adapter

readScratchpad

public byte[] readScratchpad()
                      throws OneWireIOException,
                             OneWireException
Reads the entire scratchpad.
Returns:
byte[] containing the data from the scratchpad; the array will have a length of 64.
Throws:
OneWireIOException - If device is not found on the 1-Wire network
OneWireException - on a communication or setup error with the 1-Wire adapter

copyScratchpad

public void copyScratchpad(int key,
                           byte[] passwd,
                           int blockNum)
                    throws OneWireIOException,
                           OneWireException,
                           IllegalArgumentException
Writes the data from the scratchpad to the specified block or blocks. Note that the write will erase the data from the scratchpad.
Parameters:
key - subkey being written
passwd - password for the subkey being written
blockNum - number of the block to be copied (see page 7 of the DS1991 data sheet) block 0-7, or 8 to copy all 64 bytes.
Throws:
IllegalArgumentException - If key is out of range (0 to 2), or password is not 8 characters, or if blockNum is out of range (0 to 8)
OneWireIOException - If device is not found on the 1-Wire network
OneWireException - on a communication or setup error with the 1-Wire adapter

readSubkey

public byte[] readSubkey(int key,
                         byte[] passwd)
                  throws OneWireIOException,
                         OneWireException,
                         IllegalArgumentException
Reads the subkey requested with the given key name and password. Note that this method allows for reading from the subkey data only which starts at address 0x10 within a key. It does not allow reading from any earlier address within a key because the device cannot be force to allow reading the password. This is why the subkey number is or-ed with 0x10 in creating the address in bytes 1 and 2 of the sendBlock.
Parameters:
key - number indicating the key to be read: 0, 1, or 2
passwd - password of destination subkey
Returns:
byte[] containing the data from the subkey; the array will have a length of 64, since it includes the key identifier, sent password, and 48 bytes of data.
Throws:
IllegalArgumentException - If key is out of range (0 to 2), or password is not 8 characters, or if data does not have a length of 64
OneWireIOException - If device is not found on the 1-Wire network
OneWireException - on a communication or setup error with the 1-Wire adapter

readSubkey

public void readSubkey(byte[] data,
                       int key,
                       byte[] passwd)
                throws OneWireIOException,
                       OneWireException,
                       IllegalArgumentException
Reads the subkey requested with the given key name and password. Note that this method allows for reading from the subkey data only which starts at address 0x10 within a key. It does not allow reading from any earlier address within a key because the device cannot be force to allow reading the password. This is why the subkey number is or-ed with 0x10 in creating the address in bytes 1 and 2 of the sendBlock.
Parameters:
data - buffer of length 64 into which to write the data
key - number indicating the key to be read: 0, 1, or 2
passwd - password of destination subkey
Throws:
IllegalArgumentException - If key is out of range (0 to 2), or password is not 8 characters, or if data does not have a length of 64
OneWireIOException - If device is not found on the 1-Wire network
OneWireException - on a communication or setup error with the 1-Wire adapter

writePassword

public void writePassword(int key,
                          byte[] oldName,
                          byte[] newName,
                          byte[] newPasswd)
                   throws OneWireIOException,
                          OneWireException,
                          IllegalArgumentException
Writes a new identifier and password to the secure subkey iButton
Parameters:
key - number indicating the key to be read: 0, 1, or 2
oldName - identifier of the key used to confirm the correct key's password to be changed. Must be exactly length 8.
newName - identifier to be used for the key with the new password. Must be exactly length 8.
newPasswd - new password for destination subkey. Must be exactly length 8.
Throws:
IllegalArgumentException - If key value is out of range (0 to 2), or if newPasswd, newName, or oldName are not 8 characters
OneWireIOException - If device is not found on the 1-Wire network
OneWireException - on a communication or setup error with the 1-Wire adapter

writeSubkey

public void writeSubkey(int key,
                        int addr,
                        byte[] passwd,
                        byte[] data)
                 throws OneWireIOException,
                        OneWireException,
                        IllegalArgumentException
Writes new data to the secure subkey
Parameters:
key - number indicating the key to be written: 0, 1, or 2
addr - address to start writing at ( 0x00 to 0x3F )
passwd - passwird for the subkey
data - data to be written
Throws:
IllegalArgumentException - If key is out of range (0 to 2), or if address is out of range, or if passwd is not 8 characters, or if data length is out of bounds
OneWireIOException - If device is not found on the 1-Wire network
OneWireException - on a communication or setup error with the 1-Wire adapter
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