/******************************************************************************* * $Id: crc.h,v 1.1.1.1 2008/07/21 09:14:16 james26_jang Exp $ * Copyright 2007, Broadcom Corporation * All Rights Reserved. * * THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY * KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM * SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS * FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE. * crc.h - a function to compute crc for iLine10 headers ******************************************************************************/ #ifndef _RTS_CRC_H_ #define _RTS_CRC_H_ 1 #include "typedefs.h" #ifdef __cplusplus extern "C" { #endif #define CRC8_INIT_VALUE 0xff /* Initial CRC8 checksum value */ #define CRC8_GOOD_VALUE 0x9f /* Good final CRC8 checksum value */ #define HCS_GOOD_VALUE 0x39 /* Good final header checksum value */ #define CRC16_INIT_VALUE 0xffff /* Initial CRC16 checksum value */ #define CRC16_GOOD_VALUE 0xf0b8 /* Good final CRC16 checksum value */ #define CRC32_INIT_VALUE 0xffffffff /* Initial CRC32 checksum value */ #define CRC32_GOOD_VALUE 0xdebb20e3 /* Good final CRC32 checksum value */ void hcs(uint8 *, uint); uint8 crc8(uint8 *, uint, uint8); uint16 crc16(uint8 *, uint, uint16); uint32 crc32(uint8 *, uint, uint32); /* macros for common usage */ #define APPEND_CRC8(pbytes, nbytes) \ do { \ uint8 tmp = crc8(pbytes, nbytes, CRC8_INIT_VALUE) ^ 0xff; \ (pbytes)[(nbytes)] = tmp; \ (nbytes) += 1; \ } while (0) #define APPEND_CRC16(pbytes, nbytes) \ do { \ uint16 tmp = crc16(pbytes, nbytes, CRC16_INIT_VALUE) ^ 0xffff; \ (pbytes)[(nbytes) + 0] = (tmp >> 0) & 0xff; \ (pbytes)[(nbytes) + 1] = (tmp >> 8) & 0xff; \ (nbytes) += 2; \ } while (0) #define APPEND_CRC32(pbytes, nbytes) \ do { \ uint32 tmp = crc32(pbytes, nbytes, CRC32_INIT_VALUE) ^ 0xffffffff; \ (pbytes)[(nbytes) + 0] = (tmp >> 0) & 0xff; \ (pbytes)[(nbytes) + 1] = (tmp >> 8) & 0xff; \ (pbytes)[(nbytes) + 2] = (tmp >> 16) & 0xff; \ (pbytes)[(nbytes) + 3] = (tmp >> 24) & 0xff; \ (nbytes) += 4; \ } while (0) #ifdef __cplusplus } #endif #endif /* _RTS_CRC_H_ */