MemoryBankScratchCRCPW Class Reference

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

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

List of all members.

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.

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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

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Constructor & Destructor Documentation

MemoryBankScratchCRCPW

(

PasswordContainer

ibutton

)

Memory bank contstuctor.

Requires reference to the OneWireContainer this memory bank resides on.

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Member Function Documentation

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 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 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.

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

• MemoryBankScratchCRCPW.java