CRC-8

CRC-8 checksum algorithms. More...

Detailed Description

CRC-8 checksum algorithms.

Files
file	crc8.h
	CRC-8 definitions.

Functions
uint8_t	crc8 (const uint8_t *data, size_t len, uint8_t poly, uint8_t seed)
	Calculate CRC-8 (MSB first) More...
uint8_t	crc8_lsb (const uint8_t *data, size_t len, uint8_t poly, uint8_t seed)
	Calculate a reflected CRC-8 (LSB first) More...

Function Documentation

crc8()

uint8_t crc8	(	const uint8_t *	data,
		size_t	len,
		uint8_t	poly,
		uint8_t	seed
	)

Calculate CRC-8 (MSB first)

This CRC8 checksum type is usually more common.

Parameters

[in]	data	Start of memory area to checksum
[in]	len	Number of bytes in buf to calculate checksum for
[in]	poly	The generator polynomial for the checksum
[in]	seed	The seed (starting value) for the checksum

Note

A final XOR must be realized by the caller if needed.

Returns

Checksum of the specified memory area.

crc8_lsb()

uint8_t crc8_lsb	(	const uint8_t *	data,
		size_t	len,
		uint8_t	poly,
		uint8_t	seed
	)

Calculate a reflected CRC-8 (LSB first)

This CRC8 checksum type is used for example by Onewire.

Parameters

[in]	data	Start of memory area to checksum
[in]	len	Number of bytes in buf to calculate checksum for
[in]	poly	The generator polynomial for the checksum
[in]	seed	The seed (starting value) for the checksum

Note

A final XOR must be realized by the caller if needed.

Returns

Checksum of the specified memory area.