MemoryBankScratchCRCPW Class Reference

Inherits com::dalsemi::onewire::container::MemoryBankScratchEx.

List of all members.


Detailed Description

Memory bank class for the Scratchpad section of NVRAM iButtons and 1-Wire devices with password protected memory pages.

Version:
1.00, 11 Aug 2002
Author:
SH

Public Member Functions

 MemoryBankScratchCRCPW (PasswordContainer ibutton)
 Memory bank contstuctor.
void readPageCRC (int page, boolean readContinue, byte[] readBuf, int offset) throws OneWireIOException, OneWireException
 Read a complete memory page with CRC verification provided by the device.
void readPageCRC (int page, boolean readContinue, byte[] readBuf, int offset, byte[] extraInfo) throws OneWireIOException, OneWireException
 Read a complete memory page with CRC verification provided by the device with extra information.
void readScratchpad (byte[] readBuf, int offset, int len, byte[] extraInfo) throws OneWireIOException, OneWireException
 Read the scratchpad page of memory from a NVRAM device This method reads and returns the entire scratchpad after the byte offset regardless of the actual ending offset.
void copyScratchpad (int startAddr, int len) throws OneWireIOException, OneWireException
 Copy the scratchpad page to memory.
void writeScratchpad (int startAddr, byte[] writeBuf, int offset, int len) throws OneWireIOException, OneWireException
 Write to the scratchpad page of memory a NVRAM device.

Public Attributes

boolean enablePower = false
 Enable Provided Power for some Password checking.

Protected Attributes

PasswordContainer ibPass = null
 The Password container to acces the 8 byte passwords.

Constructor & Destructor Documentation

Memory bank contstuctor.

Requires reference to the OneWireContainer this memory bank resides on.


Member Function Documentation

void readPageCRC ( int  page,
boolean  readContinue,
byte[]  readBuf,
int  offset 
) throws OneWireIOException, OneWireException

Read a complete memory page with CRC verification provided by the device.

Not supported by all devices. See the method 'hasPageAutoCRC()'.

Parameters:
page page number to read
readContinue if 'true' then device read is continued without re-selecting. This can only be used if the new readPagePacket() continious where the last one stopped and it is inside a 'beginExclusive/endExclusive' block.
readBuf byte array to put data read. Must have at least 'getMaxPacketDataLength()' elements.
offset offset into readBuf to place data
Exceptions:
OneWireIOException 
OneWireException 

Reimplemented from MemoryBankScratch.

void readPageCRC ( int  page,
boolean  readContinue,
byte[]  readBuf,
int  offset,
byte[]  extraInfo 
) throws OneWireIOException, OneWireException

Read a complete memory page with CRC verification provided by the device with extra information.

Not supported by all devices. See the method 'hasPageAutoCRC()'. See the method 'hasExtraInfo()' for a description of the optional extra information.

Parameters:
page page number to read
readContinue if 'true' then device read is continued without re-selecting. This can only be used if the new readPagePacket() continious where the last one stopped and it is inside a 'beginExclusive/endExclusive' block.
readBuf byte array to put data read. Must have at least 'getMaxPacketDataLength()' elements.
offset offset into readBuf to place data
extraInfo byte array to put extra info read into
Exceptions:
OneWireIOException 
OneWireException 

Reimplemented from MemoryBankScratch.

void readScratchpad ( byte[]  readBuf,
int  offset,
int  len,
byte[]  extraInfo 
) throws OneWireIOException, OneWireException

Read the scratchpad page of memory from a NVRAM device This method reads and returns the entire scratchpad after the byte offset regardless of the actual ending offset.

Parameters:
readBuf byte array to place read data into length of array is always pageLength.
offset offset into readBuf to pug data
len length in bytes to read
extraInfo byte array to put extra info read into (TA1, TA2, e/s byte) length of array is always extraInfoLength. Can be 'null' if extra info is not needed.
Exceptions:
OneWireIOException 
OneWireException 

Reimplemented from MemoryBankScratch.

void copyScratchpad ( int  startAddr,
int  len 
) throws OneWireIOException, OneWireException

Copy the scratchpad page to memory.

Parameters:
startAddr starting address
len length in bytes that was written already
Exceptions:
OneWireIOException 
OneWireException 

Reimplemented from MemoryBankScratchEx.

void writeScratchpad ( int  startAddr,
byte[]  writeBuf,
int  offset,
int  len 
) throws OneWireIOException, OneWireException

Write to the scratchpad page of memory a NVRAM device.

Parameters:
startAddr starting address
writeBuf byte array containing data to write
offset offset into readBuf to place data
len length in bytes to write
Exceptions:
OneWireIOException 
OneWireException 

Reimplemented from MemoryBankScratchEx.


The documentation for this class was generated from the following file:

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