CRC_Adapter

Overview

Data Structures
struct	hal_crc_config_t
	CRC configuration structure. More...

Enumerations
enum	hal_crc_cfg_refin_t {   KHAL_CrcInputNoRef = 0U,   KHAL_CrcRefInput = 1U }
	crcRefIn definitions. More...
enum	hal_crc_cfg_refout_t {   KHAL_CrcOutputNoRef = 0U,   KHAL_CrcRefOutput = 1U }
	crcRefOut definitions. More...
enum	hal_crc_cfg_byteord_t {   KHAL_CrcLSByteFirst = 0U,   KHAL_CrcMSByteFirst = 1U }
	crcByteOrder definitions. More...
enum	hal_crc_polynomial_t {   KHAL_CrcPolynomial_CRC_8_CCITT = 0x103,   KHAL_CrcPolynomial_CRC_16 = 0x1021,   KHAL_CrcPolynomial_CRC_32 = 0x4C11DB7U }
	CRC polynomials to use. More...

CRC
uint32_t	HAL_CrcCompute (hal_crc_config_t *crcConfig, uint8_t *dataIn, uint32_t length)
	Compute CRC function. More...

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Data Structure Documentation

struct hal_crc_config_t

Data Fields
hal_crc_cfg_refin_t	crcRefIn
	CRC reflect input. More...
hal_crc_cfg_refout_t	crcRefOut
	CRC reflect output. More...
hal_crc_cfg_byteord_t	crcByteOrder
	CRC byte order. More...
uint32_t	crcSeed
	CRC Seed value. More...
uint32_t	crcPoly
	CRC Polynomial value. More...
uint32_t	crcXorOut
	XOR mask for CRC result (for no mask, should be 0). More...
uint8_t	complementChecksum
	wether output the complement checksum. More...
uint8_t	crcSize
	Number of CRC octets, 2 mean use CRC16, 4 mean use CRC32. More...
uint8_t	crcStartByte
	Start CRC with this byte position. More...

Field Documentation

hal_crc_cfg_refin_t hal_crc_config_t::crcRefIn

See "hal_crc_cfg_refin_t".

hal_crc_cfg_refout_t hal_crc_config_t::crcRefOut

See "hal_crc_cfg_refout_t".

hal_crc_cfg_byteord_t hal_crc_config_t::crcByteOrder

See "hal_crc_cfg_byteord_t".

uint32_t hal_crc_config_t::crcSeed

Initial value for CRC LFSR.

uint32_t hal_crc_config_t::crcPoly

uint32_t hal_crc_config_t::crcXorOut

uint8_t hal_crc_config_t::complementChecksum

uint8_t hal_crc_config_t::crcSize

uint8_t hal_crc_config_t::crcStartByte

Byte #0 is the first byte of Sync Address.

Enumeration Type Documentation

enum hal_crc_cfg_refin_t

Enumerator
KHAL_CrcInputNoRef	Do not manipulate input data stream.
KHAL_CrcRefInput	Reflect each byte in the input stream bitwise.

enum hal_crc_cfg_refout_t

Enumerator
KHAL_CrcOutputNoRef	Do not manipulate CRC result.
KHAL_CrcRefOutput	CRC result is to be reflected bitwise (operated on entire word).

enum hal_crc_cfg_byteord_t

Enumerator
KHAL_CrcLSByteFirst	Byte order of the CRC LS Byte first.
KHAL_CrcMSByteFirst	Bit order of the CRC MS Byte first.

enum hal_crc_polynomial_t

Enumerator
KHAL_CrcPolynomial_CRC_8_CCITT	x^8+x^2+x^1+1
KHAL_CrcPolynomial_CRC_16	x^16+x^12+x^5+1
KHAL_CrcPolynomial_CRC_32	x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1

Function Documentation

uint32_t HAL_CrcCompute	(	hal_crc_config_t *	crcConfig,
		uint8_t *	dataIn,
		uint32_t	length
	)

The function computes the CRC.

* config = (hal_crc_config_t) {
*     .crcSize       = 4,
*     .crcStartByte = 0,
*     .crcRefIn       = KHAL_CrcInputNoRef,
*     .crcRefOut    = KHAL_CrcOutputNoRef,
*     .crcByteOrder = KHAL_CrcMSByteFirst,
*     .complementChecksum = true,
*     .crcSeed       = 0xFFFFFFFF,
*     .crcPoly       = KHAL_CrcPolynomial_CRC_32,
*     .crcXorOut    = 0xFFFFFFFF,
* };
*
* res = HAL_CrcCompute(&config, (uint8_t *) pattern, strlen(pattern));
*  

Note

The settings for compute CRC are taken from the passed CRC_config_t structure.

Parameters

crcConfig	configuration structure.
dataIn	input data buffer.
length	input data buffer size.

Return values

Computed

CRC value.