CRC16冗余校验
两个校验表先一个就行了
///////////////////////////////////////////////////////////////////////////////////////////////
//生成CRC16校验表的函数
//#define CRC16_CCITT 0x1021
//#define CRC16_DEFAULT 0x8005
//aPoly =CRC16_CCITT or CRC16_DEFAULT
/////////////////////////////////////////////////////////////////////////////////////////////
static void BuildTable16( unsigned short aPoly , unsigned long* Table_CRC )
{
unsigned short i, j;
unsigned short nData;
unsigned short nAccum;
TRACE0("------------------------------------------------------------------/n");
for ( i = 0; i < 256; i++ )
{
nData = ( unsigned short )( i << 8 );
nAccum = 0;
for ( j = 0; j < 8; j++ )
{
if ( ( nData ^ nAccum ) & 0x8000 )
nAccum = ( nAccum << 1 ) ^ aPoly;
else
nAccum <<= 1;
nData <<= 1;
}
Table_CRC[i] = ( unsigned long )nAccum;
TRACE1("0x%04x,",Table_CRC[i]);
if (((i+1) % 8) == 0 )
TRACE("/n");
}
TRACE0("------------------------------------------------------------------");
}
/////////////////////////////////////////////////////////////////////////////////
// --------------------------------------------------------------
// CRC16计算方法 :256长度的校验表
// 多项式为 g(x) = xD16+xD12+xD5+1
// CRC16_CCITT 0x1021;
const unsigned long Table_CRC[] =
{
0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7,
0x8108,0x9129,0xa14a,0xb16b,0xc18c,0xd1ad,0xe1ce,0xf1ef,
0x1231,0x0210,0x3273,0x2252,0x52b5,0x4294,0x72f7,0x62d6,
0x9339,0x8318,0xb37b,0xa35a,0xd3bd,0xc39c,0xf3ff,0xe3de,
0x2462,0x3443,0x0420,0x1401,0x64e6,0x74c7,0x44a4,0x5485,
0xa56a,0xb54b,0x8528,0x9509,0xe5ee,0xf5cf,0xc5ac,0xd58d,
0x3653,0x2672,0x1611,0x0630,0x76d7,0x66f6,0x5695,0x46b4,
0xb75b,0xa77a,0x9719,0x8738,0xf7df,0xe7fe,0xd79d,0xc7bc,
0x48c4,0x58e5,0x6886,0x78a7,0x0840,0x1861,0x2802,0x3823,
0xc9cc,0xd9ed,0xe98e,0xf9af,0x8948,0x9969,0xa90a,0xb92b,
0x5af5,0x4ad4,0x7ab7,0x6a96,0x1a71,0x0a50,0x3a33,0x2a12,
0xdbfd,0xcbdc,0xfbbf,0xeb9e,0x9b79,0x8b58,0xbb3b,0xab1a,
0x6ca6,0x7c87,0x4ce4,0x5cc5,0x2c22,0x3c03,0x0c60,0x1c41,
0xedae,0xfd8f,0xcdec,0xddcd,0xad2a,0xbd0b,0x8d68,0x9d49,
0x7e97,0x6eb6,0x5ed5,0x4ef4,0x3e13,0x2e32,0x1e51,0x0e70,
0xff9f,0xefbe,0xdfdd,0xcffc,0xbf1b,0xaf3a,0x9f59,0x8f78,
0x9188,0x81a9,0xb1ca,0xa1eb,0xd10c,0xc12d,0xf14e,0xe16f,
0x1080,0x00a1,0x30c2,0x20e3,0x5004,0x4025,0x7046,0x6067,
0x83b9,0x9398,0xa3fb,0xb3da,0xc33d,0xd31c,0xe37f,0xf35e,
0x02b1,0x1290,0x22f3,0x32d2,0x4235,0x5214,0x6277,0x7256,
0xb5ea,0xa5cb,0x95a8,0x8589,0xf56e,0xe54f,0xd52c,0xc50d,
0x34e2,0x24c3,0x14a0,0x0481,0x7466,0x6447,0x5424,0x4405,
0xa7db,0xb7fa,0x8799,0x97b8,0xe75f,0xf77e,0xc71d,0xd73c,
0x26d3,0x36f2,0x0691,0x16b0,0x6657,0x7676,0x4615,0x5634,
0xd94c,0xc96d,0xf90e,0xe92f,0x99c8,0x89e9,0xb98a,0xa9ab,
0x5844,0x4865,0x7806,0x6827,0x18c0,0x08e1,0x3882,0x28a3,
0xcb7d,0xdb5c,0xeb3f,0xfb1e,0x8bf9,0x9bd8,0xabbb,0xbb9a,
0x4a75,0x5a54,0x6a37,0x7a16,0x0af1,0x1ad0,0x2ab3,0x3a92,
0xfd2e,0xed0f,0xdd6c,0xcd4d,0xbdaa,0xad8b,0x9de8,0x8dc9,
0x7c26,0x6c07,0x5c64,0x4c45,0x3ca2,0x2c83,0x1ce0,0x0cc1,
0xef1f,0xff3e,0xcf5d,0xdf7c,0xaf9b,0xbfba,0x8fd9,0x9ff8,
0x6e17,0x7e36,0x4e55,0x5e74,0x2e93,0x3eb2,0x0ed1,0x1ef0,
};
//---------------------------------------------------------------------------------------------------
// CRC16计算方法 :256长度的校验表
// 多项式为 g(x) = xD16+xD15+xD2+1
// CRC16_DEFAULT 0x8005
const unsigned long Table_CRC[] =
{
0x0000,0x8005,0x800f,0x000a,0x801b,0x001e,0x0014,0x8011,
0x8033,0x0036,0x003c,0x8039,0x0028,0x802d,0x8027,0x0022,
0x8063,0x0066,0x006c,0x8069,0x0078,0x807d,0x8077,0x0072,
0x0050,0x8055,0x805f,0x005a,0x804b,0x004e,0x0044,0x8041,
0x80c3,0x00c6,0x00cc,0x80c9,0x00d8,0x80dd,0x80d7,0x00d2,
0x00f0,0x80f5,0x80ff,0x00fa,0x80eb,0x00ee,0x00e4,0x80e1,
0x00a0,0x80a5,0x80af,0x00aa,0x80bb,0x00be,0x00b4,0x80b1,
0x8093,0x0096,0x009c,0x8099,0x0088,0x808d,0x8087,0x0082,
0x8183,0x0186,0x018c,0x8189,0x0198,0x819d,0x8197,0x0192,
0x01b0,0x81b5,0x81bf,0x01ba,0x81ab,0x01ae,0x01a4,0x81a1,
0x01e0,0x81e5,0x81ef,0x01ea,0x81fb,0x01fe,0x01f4,0x81f1,
0x81d3,0x01d6,0x01dc,0x81d9,0x01c8,0x81cd,0x81c7,0x01c2,
0x0140,0x8145,0x814f,0x014a,0x815b,0x015e,0x0154,0x8151,
0x8173,0x0176,0x017c,0x8179,0x0168,0x816d,0x8167,0x0162,
0x8123,0x0126,0x012c,0x8129,0x0138,0x813d,0x8137,0x0132,
0x0110,0x8115,0x811f,0x011a,0x810b,0x010e,0x0104,0x8101,
0x8303,0x0306,0x030c,0x8309,0x0318,0x831d,0x8317,0x0312,
0x0330,0x8335,0x833f,0x033a,0x832b,0x032e,0x0324,0x8321,
0x0360,0x8365,0x836f,0x036a,0x837b,0x037e,0x0374,0x8371,
0x8353,0x0356,0x035c,0x8359,0x0348,0x834d,0x8347,0x0342,
0x03c0,0x83c5,0x83cf,0x03ca,0x83db,0x03de,0x03d4,0x83d1,
0x83f3,0x03f6,0x03fc,0x83f9,0x03e8,0x83ed,0x83e7,0x03e2,
0x83a3,0x03a6,0x03ac,0x83a9,0x03b8,0x83bd,0x83b7,0x03b2,
0x0390,0x8395,0x839f,0x039a,0x838b,0x038e,0x0384,0x8381,
0x0280,0x8285,0x828f,0x028a,0x829b,0x029e,0x0294,0x8291,
0x82b3,0x02b6,0x02bc,0x82b9,0x02a8,0x82ad,0x82a7,0x02a2,
0x82e3,0x02e6,0x02ec,0x82e9,0x02f8,0x82fd,0x82f7,0x02f2,
0x02d0,0x82d5,0x82df,0x02da,0x82cb,0x02ce,0x02c4,0x82c1,
0x8243,0x0246,0x024c,0x8249,0x0258,0x825d,0x8257,0x0252,
0x0270,0x8275,0x827f,0x027a,0x826b,0x026e,0x0264,0x8261,
0x0220,0x8225,0x822f,0x022a,0x823b,0x023e,0x0234,0x8231,
0x8213,0x0216,0x021c,0x8219,0x0208,0x820d,0x8207,0x0202,
};
//-----------------------------------------------------------------------------------------------------
static unsigned short CRC16( const BYTE * aData, unsigned long aByteSize)
{
unsigned long i;
unsigned short nAccum= 0;
for ( i = 0; i < aByteSize; i++ )
nAccum = ( nAccum << 8 ) ^ ( WORD )Table_CRC[( nAccum >> 8 ) ^ *aData++];
return nAccum;
}