functions for calculating and checking 8bit or 16bit CRC (cyclic redundancy check) checksums.
For 8 bit CRC calculation, the polynomial used is
For 16 bit CRC calculations, the polynomial used is
Author: Monica Redon Segrera and Nuria Llombart Juan
Copyright: (C) 2003-2004 by Fraunhofer IIS-A, IT-Services, Erlangen
Created: 2001-02-01
Version: 2004-03-02
#include "crc_8_16.h"
Functions | |
void | CRC_Init_16 (unsigned short usCRC_Table[]) |
create CRC-16 table | |
void | CRC_Init_8 (unsigned char ucCRC_Table[]) |
create CRC-8 table | |
unsigned short | CRC_Build_16 (const unsigned char *cDataPointer, const unsigned long iLength) |
calculate CRC-16 | |
unsigned char | CRC_Build_8 (const unsigned char *cDataPointer, const unsigned long iLength) |
calculate 8 bit CRC | |
char | CRC_Check_16 (const unsigned char *cDataPointer, const unsigned long iLength, const unsigned short iCRC_16) |
check whether data matches CRC-16 | |
char | CRC_Check_8 (const unsigned char *cDataPointer, const unsigned long iLength, const unsigned char iCRC_8) |
check whether data matches CRC-8 | |
Variables | |
const unsigned short | CRC_Table_16 [256] |
const unsigned char | CRC_Table_8 [256] |
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calculate CRC-16
calculates the 16 bit CRC value of the provided data and returns it CreationDate: 2001-02-02 Version: 2004-03-02
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calculate 8 bit CRC
calculates the 8 bit CRC value of the provided data and returns it CreationDate: 2001-02-02 Version: 2004-03-02
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check whether data matches CRC-16
compares the 16 bit CRC value of the provided data to the provided 16 bit value CreationDate: 2001-02-02 Version: 2004-03-02
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check whether data matches CRC-8
compares the 8 bit CRC value of the provided data to the provided 8 bit value CreationDate: 2001-02-02 Version: 2004-03-02
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create CRC-16 table
creates the necessary table for being used in the efficient calculation of the 16 bit CRC.
Version: 2004-03-02
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create CRC-8 table
creates the necessary table for being used in the efficient calculation of the 8 bit CRC
Version: 2004-03-02
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Global variable in which the CRC-16 table is stored |
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Initial value: { 0x0, 0x1D, 0x3A, 0x27, 0x74, 0x69, 0x4E, 0x53, 0xE8, 0xF5, 0xD2, 0xCF, 0x9C, 0x81, 0xA6, 0xBB, 0xCD, 0xD0, 0xF7, 0xEA, 0xB9, 0xA4, 0x83, 0x9E, 0x25, 0x38, 0x1F, 0x2, 0x51, 0x4C, 0x6B, 0x76, 0x87, 0x9A, 0xBD, 0xA0, 0xF3, 0xEE, 0xC9, 0xD4, 0x6F, 0x72, 0x55, 0x48, 0x1B, 0x6, 0x21, 0x3C, 0x4A, 0x57, 0x70, 0x6D, 0x3E, 0x23, 0x4, 0x19, 0xA2, 0xBF, 0x98, 0x85, 0xD6, 0xCB, 0xEC, 0xF1, 0x13, 0xE, 0x29, 0x34, 0x67, 0x7A, 0x5D, 0x40, 0xFB, 0xE6, 0xC1, 0xDC, 0x8F, 0x92, 0xB5, 0xA8, 0xDE, 0xC3, 0xE4, 0xF9, 0xAA, 0xB7, 0x90, 0x8D, 0x36, 0x2B, 0xC, 0x11, 0x42, 0x5F, 0x78, 0x65, 0x94, 0x89, 0xAE, 0xB3, 0xE0, 0xFD, 0xDA, 0xC7, 0x7C, 0x61, 0x46, 0x5B, 0x8, 0x15, 0x32, 0x2F, 0x59, 0x44, 0x63, 0x7E, 0x2D, 0x30, 0x17, 0xA, 0xB1, 0xAC, 0x8B, 0x96, 0xC5, 0xD8, 0xFF, 0xE2, 0x26, 0x3B, 0x1C, 0x1, 0x52, 0x4F, 0x68, 0x75, 0xCE, 0xD3, 0xF4, 0xE9, 0xBA, 0xA7, 0x80, 0x9D, 0xEB, 0xF6, 0xD1, 0xCC, 0x9F, 0x82, 0xA5, 0xB8, 0x3, 0x1E, 0x39, 0x24, 0x77, 0x6A, 0x4D, 0x50, 0xA1, 0xBC, 0x9B, 0x86, 0xD5, 0xC8, 0xEF, 0xF2, 0x49, 0x54, 0x73, 0x6E, 0x3D, 0x20, 0x7, 0x1A, 0x6C, 0x71, 0x56, 0x4B, 0x18, 0x5, 0x22, 0x3F, 0x84, 0x99, 0xBE, 0xA3, 0xF0, 0xED, 0xCA, 0xD7, 0x35, 0x28, 0xF, 0x12, 0x41, 0x5C, 0x7B, 0x66, 0xDD, 0xC0, 0xE7, 0xFA, 0xA9, 0xB4, 0x93, 0x8E, 0xF8, 0xE5, 0xC2, 0xDF, 0x8C, 0x91, 0xB6, 0xAB, 0x10, 0xD, 0x2A, 0x37, 0x64, 0x79, 0x5E, 0x43, 0xB2, 0xAF, 0x88, 0x95, 0xC6, 0xDB, 0xFC, 0xE1, 0x5A, 0x47, 0x60, 0x7D, 0x2E, 0x33, 0x14, 0x9, 0x7F, 0x62, 0x45, 0x58, 0xB, 0x16, 0x31, 0x2C, 0x97, 0x8A, 0xAD, 0xB0, 0xE3, 0xFE, 0xD9, 0xC4 } |