Package com.diozero.util

Class Crc

java.lang.Object

com.diozero.util.Crc

public class Crc
extends Object

CRC-8 and CRC-16 calculator. See:

• https://en.wikipedia.org/wiki/Cyclic_redundancy_check
• https://crccalc.com
• http://www.zlib.net/crc_v3.txt
• https://github.com/sigurn/crc8/blob/master/crc8.go
• https://github.com/sigurn/crc16/blob/master/crc16.go
• https://www.lammertbies.nl/comm/info/crc-calculation

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	Crc.Params

Field Summary

Fields

Modifier and Type	Field	Description
static Crc.Params	CRC16_A
static Crc.Params	CRC16_ARC
static Crc.Params	CRC16_AUG_CCITT
static Crc.Params	CRC16_BUYPASS
static Crc.Params	CRC16_CCITT_FALSE
static Crc.Params	CRC16_CDMA2000
static Crc.Params	CRC16_DDS_110
static Crc.Params	CRC16_DECT_R
static Crc.Params	CRC16_DECT_X
static Crc.Params	CRC16_DNP
static Crc.Params	CRC16_EN_13757
static Crc.Params	CRC16_GENIBUS
static Crc.Params	CRC16_KERMIT
static Crc.Params	CRC16_MAXIM
static Crc.Params	CRC16_MCRF4XX
static Crc.Params	CRC16_MODBUS
static Crc.Params	CRC16_RIELLO
static Crc.Params	CRC16_T10_DIF
static Crc.Params	CRC16_TELEDISK
static Crc.Params	CRC16_TMS37157
static Crc.Params	CRC16_USB
static Crc.Params	CRC16_X25
static Crc.Params	CRC16_XMODEM
static Crc.Params	CRC8
static Crc.Params	CRC8_CDMA2000
static Crc.Params	CRC8_DARC
static Crc.Params	CRC8_DVBS2
static Crc.Params	CRC8_EBU
static Crc.Params	CRC8_ICODE
static Crc.Params	CRC8_ITU
static Crc.Params	CRC8_MAXIM
static Crc.Params	CRC8_ROHC
static Crc.Params	CRC8_WCDMA

Constructor Summary

Constructors

Constructor	Description
Crc()

Method Summary

Modifier and Type	Method	Description
static int	crc16(Crc.Params params, byte... data)
static int	crc16Short(Crc.Params params, short data)	Calculate CRC-16 using the specified parameters
static int	crc8(byte... data)	Calculate CRC-8 checksum using the default CRC8 parameters
static int	crc8(short data)	Calculate CRC-8 checksum using the default CRC8 parameters
static int	crc8(Crc.Params params, byte... data)	Calculate CRC-8 checksum using the specified parameters
static int	crc8(Crc.Params params, short data)	Calculate CRC-8 checksum using the specified parameters

Methods inherited from class java.lang.Object

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

Field Details

CRC8

public static final Crc.Params CRC8

CRC8_CDMA2000

public static final Crc.Params CRC8_CDMA2000

CRC8_DARC

public static final Crc.Params CRC8_DARC

CRC8_DVBS2

public static final Crc.Params CRC8_DVBS2

CRC8_EBU

public static final Crc.Params CRC8_EBU

CRC8_ICODE

public static final Crc.Params CRC8_ICODE

CRC8_ITU

public static final Crc.Params CRC8_ITU

CRC8_MAXIM

public static final Crc.Params CRC8_MAXIM

CRC8_ROHC

public static final Crc.Params CRC8_ROHC

CRC8_WCDMA

public static final Crc.Params CRC8_WCDMA

CRC16_CCITT_FALSE

public static final Crc.Params CRC16_CCITT_FALSE

CRC16_ARC

public static final Crc.Params CRC16_ARC

CRC16_AUG_CCITT

public static final Crc.Params CRC16_AUG_CCITT

CRC16_BUYPASS

public static final Crc.Params CRC16_BUYPASS

CRC16_CDMA2000

public static final Crc.Params CRC16_CDMA2000

CRC16_DDS_110

public static final Crc.Params CRC16_DDS_110

CRC16_DECT_R

public static final Crc.Params CRC16_DECT_R

CRC16_DECT_X

public static final Crc.Params CRC16_DECT_X

CRC16_DNP

public static final Crc.Params CRC16_DNP

CRC16_EN_13757

public static final Crc.Params CRC16_EN_13757

CRC16_GENIBUS

public static final Crc.Params CRC16_GENIBUS

CRC16_MAXIM

public static final Crc.Params CRC16_MAXIM

CRC16_MCRF4XX

public static final Crc.Params CRC16_MCRF4XX

CRC16_RIELLO

public static final Crc.Params CRC16_RIELLO

CRC16_T10_DIF

public static final Crc.Params CRC16_T10_DIF

CRC16_TELEDISK

public static final Crc.Params CRC16_TELEDISK

CRC16_TMS37157

public static final Crc.Params CRC16_TMS37157

CRC16_USB

public static final Crc.Params CRC16_USB

CRC16_A

public static final Crc.Params CRC16_A

CRC16_KERMIT

public static final Crc.Params CRC16_KERMIT

CRC16_MODBUS

public static final Crc.Params CRC16_MODBUS

CRC16_X25

public static final Crc.Params CRC16_X25

CRC16_XMODEM

public static final Crc.Params CRC16_XMODEM

Constructor Details

Crc

public Crc()

Method Details

crc8

public static int crc8(short data)

Calculate CRC-8 checksum using the default CRC8 parameters

Parameters:

data - data to checksum (big endian)

Returns:

CRC-8 checksum

crc8

public static int crc8(Crc.Params params,
short data)

Calculate CRC-8 checksum using the specified parameters

Parameters:

params - CRC parameters

data - data to checksum (big endian)

Returns:

CRC-8 checksum

crc8

public static int crc8(byte... data)

Calculate CRC-8 checksum using the default CRC8 parameters

Parameters:

data - data to checksum

Returns:

CRC-8 checksum

crc8

public static int crc8(Crc.Params params,
byte... data)

Calculate CRC-8 checksum using the specified parameters

Parameters:

params - CRC parameters

data - data to checksum

Returns:

CRC-8 checksum

crc16Short

public static int crc16Short(Crc.Params params,
short data)

Calculate CRC-16 using the specified parameters

Parameters:

params - CRC parameters

data - The data to generate the CRC for (big endian)

Returns:

the calculated CRC-16 value

crc16

public static int crc16(Crc.Params params,
byte... data)