cCRC Class Reference

Cyclic Redundancy Code checker class, used for protecting communication against transmission errors. More...

#include <crc.h>

Inheritance diagram for cCRC:

Public Member Functions
tCRCValue	AddByte (unsigned char byte)
	insert byte into CRC calculation and return the new current CRC checksum More...
tCRCValue	AddBytes (unsigned char *bytes, int nb_bytes)
	insert nb_bytes from bytes into CRC calculation and return the new current CRC checksum More...
	cCRC (tCRCValue const *_crc_table, tCRCValue _initial_value)
	constructor: create a new cCRC object and initialize the current value of the CRC checksum. crc_table is the CRC table to use. More...
tCRCValue	GetCRC ()
	return the current CRC value More...
UInt8	GetCRC_HB ()
	return the high byte of the current CRC value More...
UInt8	GetCRC_LB ()
	return the low byte of the current CRC value More...
tCRCValue	Reset ()
	reset the current CRC value to its initial value and return it; More...

Protected Attributes
tCRCValue const *	crc_table
	table with precalculated CRC values More...
tCRCValue	current_crc
	current value of the CRC checksum More...
tCRCValue	initial_value
	initial value of the CRC checksum More...

Detailed Description

Cyclic Redundancy Code checker class, used for protecting communication against transmission errors.

Generic class to calculate a CRC using a given, precalculated table.

Use derived classes like cCRC_DSACON32m with a specifically set CRC table.

Definition at line 82 of file crc.h.

Constructor & Destructor Documentation

cCRC::cCRC ( tCRCValue const *  _crc_table, tCRCValue  _initial_value  )

inline

constructor: create a new cCRC object and initialize the current value of the CRC checksum. crc_table is the CRC table to use.

Definition at line 96 of file crc.h.

Member Function Documentation

tCRCValue cCRC::AddByte ( unsigned char  byte )

inline

insert byte into CRC calculation and return the new current CRC checksum

Definition at line 104 of file crc.h.

tCRCValue cCRC::AddBytes ( unsigned char *  bytes, int  nb_bytes  )

inline

insert nb_bytes from bytes into CRC calculation and return the new current CRC checksum

Definition at line 111 of file crc.h.

tCRCValue cCRC::GetCRC ( )

inline

return the current CRC value

Definition at line 119 of file crc.h.

UInt8 cCRC::GetCRC_HB ( )

inline

return the high byte of the current CRC value

Definition at line 131 of file crc.h.

UInt8 cCRC::GetCRC_LB ( )

inline

return the low byte of the current CRC value

Definition at line 125 of file crc.h.

tCRCValue cCRC::Reset ( )

inline

reset the current CRC value to its initial value and return it;

Definition at line 137 of file crc.h.

Member Data Documentation

tCRCValue const* cCRC::crc_table

protected

table with precalculated CRC values

Definition at line 92 of file crc.h.

tCRCValue cCRC::current_crc

protected

current value of the CRC checksum

Definition at line 86 of file crc.h.

tCRCValue cCRC::initial_value

protected

initial value of the CRC checksum

Definition at line 89 of file crc.h.

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The documentation for this class was generated from the following file:

• crc.h