tijos.framework.util.crc

Class CRC16_IBM

java.lang.Object

tijos.framework.util.crc.CRC16_IBM

public class CRC16_IBM
extends Object

CRC16 is a class containing an implementation of the Cyclic-Redundency-Check (CRC) CRC16. The CRC16 is used in iButton memory packet structure.

CRC16 is based on the polynomial = X^16 + X^15 + X^2 + 1.

Constructor Summary

Constructors

Constructor and Description
CRC16_IBM() Private constructor to prevent instantiation.

Method Summary

Modifier and Type	Method and Description
int	getCount()
int	getValue() Returns CRC-16 value.
void	reset() Resets CRC to initial value.
void	update(byte[] b) Updates checksum with specified array of bytes.
void	update(byte[] b, int off, int len)
void	update(int b) Perform the CRC16 on the data element based on a zero seed.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CRC16_IBM

public CRC16_IBM()

Private constructor to prevent instantiation.

Method Detail

getCount

public int getCount()

getValue

public int getValue()

Returns CRC-16 value.

Returns:

CRC value

reset

public void reset()

Resets CRC to initial value.

update

public void update(byte[] b)

Updates checksum with specified array of bytes.

Parameters:

b - the array of bytes to update the checksum with

update

public void update(byte[] b,
                   int off,
                   int len)

update

public void update(int b)

Perform the CRC16 on the data element based on a zero seed.

CRC16 is based on the polynomial = X^16 + X^15 + X^2 + 1.

Parameters:

b - data element on which to perform the CRC16