libscrc 0.1.0

Library for calculating CRC8/CRC16/CRC32/CRC64

libscrc is a library for calculating CRC8 CRC16 CRC32 CRC64.

CRC8	CRC16	CRC32	CRC64
Intel	Modbus	FSC	ISO
BCC	IBM	FILE	ECMA182
LRC	XModem
	CCITT
	Kermit
	Sick
	DNP

Installation

• Compile and install the library:

  pip3 install libscrc

  or:

  python setup.py build
  python setup.py install

  You will need the administrative privileges to execute the last command.

• After installation you can run unit tests to make sure that the library works fine. Execute:

  python -m libscrc.testmodbus
  python -m libscrc.testcrc64

Usage

In Python 3:

import libscrc
crc16 = libscrc.modbus(b'1234')  # Calculate ASCII of modbus
crc16 = libscrc.modbus(b'\x01\x02')  # Calculate HEX of modbus

You can also calculate CRC gradually:

import libscrc
crc16 = libscrc.xmodem(b'1234')
crc16 = libscrc.xmodem(b'5678', crc16)

Example

• CRC8:

  crc8 = libscrc.intel(b'1234')
  crc8 = libscrc.bcc(b'1234')
  crc8 = libscrc.lrc(b'1234')
  crc8 = libscrc.verb(b'1234')

• CRC16:

  crc16 = libscrc.ibm(b'1234')
  crc16 = libscrc.modbus(b'1234')
  crc16 = libscrc.xmodem(b'1234')
  crc16 = libscrc.ccitt(b'1234', 0xFFFF)  # poly=0x1021 initvalue=0xFFFF or 0x1D0F
  crc16 = libscrc.kermit(b'1234')
  crc16 = libscrc.sick(b'1234')
  crc16 = libscrc.dnp(b'1234')

• CRC32:

  crc32 = libscrc.fsc(b'1234')
  crc32 = libscrc.crc32(b'1234')

• CRC64:

  crc64 = libscrc.iso(b'1234')
  crc64 = libscrc.ecma182(b'1234')