Cyclic Redundancy Code checker class, used for protecting communication against transmission errors. More...
#include <crc.h>
Public Member Functions | |
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. | |
tCRCValue | AddByte (unsigned char byte) |
insert byte into CRC calculation and return the new current CRC checksum | |
tCRCValue | AddBytes (unsigned char *bytes, int nb_bytes) |
insert nb_bytes from bytes into CRC calculation and return the new current CRC checksum | |
tCRCValue | GetCRC () |
return the current CRC value | |
UInt8 | GetCRC_LB () |
return the low byte of the current CRC value | |
UInt8 | GetCRC_HB () |
return the high byte of the current CRC value | |
tCRCValue | Reset () |
reset the current CRC value to its initial value and return it; | |
Protected Attributes | |
tCRCValue | current_crc |
current value of the CRC checksum | |
tCRCValue | initial_value |
initial value of the CRC checksum | |
tCRCValue const * | crc_table |
table with precalculated CRC values |
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.
constructor: create a new cCRC object and initialize the current value of the CRC checksum. crc_table is the CRC table to use.
tCRCValue SDH::cCRC::AddByte | ( | unsigned char | byte | ) | [inline] |
insert byte into CRC calculation and return the new current CRC checksum
tCRCValue SDH::cCRC::AddBytes | ( | unsigned char * | bytes, |
int | nb_bytes | ||
) | [inline] |
insert nb_bytes from bytes into CRC calculation and return the new current CRC checksum
tCRCValue SDH::cCRC::GetCRC | ( | ) | [inline] |
return the current CRC value
UInt8 SDH::cCRC::GetCRC_HB | ( | ) | [inline] |
return the high byte of the current CRC value
UInt8 SDH::cCRC::GetCRC_LB | ( | ) | [inline] |
return the low byte of the current CRC value
tCRCValue SDH::cCRC::Reset | ( | ) | [inline] |
reset the current CRC value to its initial value and return it;
tCRCValue const* SDH::cCRC::crc_table [protected] |
table with precalculated CRC values
tCRCValue SDH::cCRC::current_crc [protected] |
current value of the CRC checksum
tCRCValue SDH::cCRC::initial_value [protected] |
initial value of the CRC checksum