跪求24位CRC校验的C语言程序，生成多项式g（x）=x^24+x^23+x^6+x^5+x+1

long int GenerateChecksumCRC24_D32(unsigned long ulNumValues,unsigned long *pulData)

{

unsigned long i,ulData,lfsr = 0xFFFFFF

for (i= 0x0i <ulNumValuesi++)

{

ulData = pulData[i]

lfsr = CRC24_D32(lfsr,ulData)

}

return lfsr

}

static unsigned long CRC24_D32(const unsigned long old_CRC, const unsigned long Data)

{

unsigned long D [32]

unsigned long C [24]

unsigned long NewCRC [24]

unsigned long ulCRC24_D32

unsigned long int f, tmp

unsigned long int bit_mask = 0x000001

tmp = 0x000000

// Convert previous CRC value to binary.

bit_mask = 0x000001

for (f = 0f <= 23f++)

{

C[f] = (old_CRC &bit_mask) >>f

bit_mask = bit_mask <<1

}

// Convert data to binary.

bit_mask = 0x000001

for (f = 0f <= 31f++)

{

D[f] = (Data &bit_mask) >>f

bit_mask = bit_mask <<1

}

// Calculate new LFSR value.

NewCRC[0] = D[31] ^ D[30] ^ D[29] ^ D[28] ^ D[27] ^ D[26] ^ D[25] ^

D[24] ^ D[23] ^ D[17] ^ D[16] ^ D[15] ^ D[14] ^ D[13] ^

D[12] ^ D[11] ^ D[10] ^ D[9] ^ D[8] ^ D[7] ^ D[6] ^

D[5] ^ D[4] ^ D[3] ^ D[2] ^ D[1] ^ D[0] ^ C[0] ^ C[1] ^

C[2] ^ C[3] ^ C[4] ^ C[5] ^ C[6] ^ C[7] ^ C[8] ^ C[9] ^

C[15] ^ C[16] ^ C[17] ^ C[18] ^ C[19] ^ C[20] ^ C[21] ^

C[22] ^ C[23]

NewCRC[1] = D[23] ^ D[18] ^ D[0] ^ C[10] ^ C[15]

NewCRC[2] = D[24] ^ D[19] ^ D[1] ^ C[11] ^ C[16]

NewCRC[3] = D[25] ^ D[20] ^ D[2] ^ C[12] ^ C[17]

NewCRC[4] = D[26] ^ D[21] ^ D[3] ^ C[13] ^ C[18]

NewCRC[5] = D[31] ^ D[30] ^ D[29] ^ D[28] ^ D[26] ^ D[25] ^ D[24] ^

D[23] ^ D[22] ^ D[17] ^ D[16] ^ D[15] ^ D[14] ^ D[13] ^

D[12] ^ D[11] ^ D[10] ^ D[9] ^ D[8] ^ D[7] ^ D[6] ^

D[5] ^ D[3] ^ D[2] ^ D[1] ^ D[0] ^ C[0] ^ C[1] ^ C[2] ^

C[3] ^ C[4] ^ C[5] ^ C[6] ^ C[7] ^ C[8] ^ C[9] ^ C[14] ^

C[15] ^ C[16] ^ C[17] ^ C[18] ^ C[20] ^ C[21] ^ C[22] ^

C[23]

LFSR代码示例

签名数友散是一个多项薯氏式为x24+ x23+ x6

+ x5

+x+1的24位CRC。初始值为告枯0xFFFFFF。

AN-1160

Rev. A | Page 7 of 8

NewCRC[6] = D[28] ^ D[18] ^ D[5] ^ D[0] ^ C[10] ^ C[20]

NewCRC[7] = D[29] ^ D[19] ^ D[6] ^ D[1] ^ C[11] ^ C[21]

NewCRC[8] = D[30] ^ D[20] ^ D[7] ^ D[2] ^ C[12] ^ C[22]

NewCRC[9] = D[31] ^ D[21] ^ D[8] ^ D[3] ^ C[0] ^ C[13] ^ C[23]

NewCRC[10] = D[22] ^ D[9] ^ D[4] ^ C[1] ^ C[14]

NewCRC[11] = D[23] ^ D[10] ^ D[5] ^ C[2] ^ C[15]

NewCRC[12] = D[24] ^ D[11] ^ D[6] ^ C[3] ^ C[16]

NewCRC[13] = D[25] ^ D[12] ^ D[7] ^ C[4] ^ C[17]

NewCRC[14] = D[26] ^ D[13] ^ D[8] ^ C[0] ^ C[5] ^ C[18]

NewCRC[15] = D[27] ^ D[14] ^ D[9] ^ C[1] ^ C[6] ^ C[19]

NewCRC[16] = D[28] ^ D[15] ^ D[10] ^ C[2] ^ C[7] ^ C[20]

NewCRC[17] = D[29] ^ D[16] ^ D[11] ^ C[3] ^ C[8] ^ C[21]

NewCRC[18] = D[30] ^ D[17] ^ D[12] ^ C[4] ^ C[9] ^ C[22]

NewCRC[19] = D[31] ^ D[18] ^ D[13] ^ C[5] ^ C[10] ^ C[23]

NewCRC[20] = D[19] ^ D[14] ^ C[6] ^ C[11]

NewCRC[21] = D[20] ^ D[15] ^ C[7] ^ C[12]

NewCRC[22] = D[21] ^ D[16] ^ C[8] ^ C[13]

NewCRC[23] = D[31] ^ D[30] ^ D[29] ^ D[28] ^ D[27] ^ D[26] ^ D[25] ^

D[24] ^ D[23] ^ D[22] ^ D[16] ^ D[15] ^ D[14] ^ D[13] ^

D[12] ^ D[11] ^ D[10] ^ D[9] ^ D[8] ^ D[7] ^ D[6] ^

D[5] ^ D[4] ^ D[3] ^ D[2] ^ D[1] ^ D[0] ^ C[0] ^ C[1] ^

C[2] ^ C[3] ^ C[4] ^ C[5] ^ C[6] ^ C[7] ^ C[8] ^ C[14] ^

C[15] ^ C[16] ^ C[17] ^ C[18] ^ C[19] ^ C[20] ^ C[21] ^

C[22] ^ C[23]

ulCRC24_D32 = 0

// LFSR value from binary to hex.

bit_mask = 0x000001

for (f = 0f <= 23f++)

{

ulCRC24_D32 = ulCRC24_D32 + NewCRC[f] * bit_mask

bit_mask = bit_mask <<1

}

return(ulCRC24_D32 &0x00FFFFFF)

}

static unsigned int crc_table[256] = {

0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc,

0x17c56b6b,

0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6,

0x2b4bcb61,

0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70,

0x48d0c6c7,

0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2,

0x52568b75,

0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014,

0x7ddc5da3,

0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e,

0x95609039,

0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58,

0xbaea46ef,

0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea,

0xa06c0b5d,

0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c,

0xc3f706fb,

0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46,

0xff79a6f1,

0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077,

0x30476dc0,

0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5,

0x2ac12072,

0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13,

0x054bf6a4,

0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069,

0x75d48dde,

0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf,

0x5a5e5b08,

0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d,

0x40d816ba,

0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b,

0xbb60adfc,

0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041,

0x87ee0df6,

0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7,

0xe4750050,

0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055,

0xfef34de2,

0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683,

0xd1799b34,

0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80,

0x644fc637,

0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56,

0x4bc510e1,

0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4,

0x51435d53,

0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42,

0x32d850f5,

0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48,

0x0e56f0ff,

0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e,

0xf5ee4bb9,

0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc,

0xef68060b,

0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a,

0xc0e2d0dd,

0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610,

0xb07daba7,

0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6,

0x9ff77d71,

0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74,

0x857130c3,

0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645,

0x4a4ffbf2,

0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f,

0x76c15bf8,

0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9,

0x155a565e,

0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b,

0x0fdc1bec,

0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d,

0x2056cd3a,

0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17,

0xc8ea00a0,

0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1,

0xe760d676,

0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673,

0xfde69bc4,

0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5,

0x9e7d9662,

0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf,

0xa2f33668,

0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4

}

/*

* calculating the crc checksum, return 0 if it is right

* or !=0 when error occurs

*/

unsigned int crc32(char *data, int len)

{

register int i

unsigned int crc = 0xffffffff

for (i=0i<leni++)

crc = (crc <<8) ^ crc_table[((crc >>24) ^ *data++) &0xff]

return crc

}

1、首先在电脑中，找到并选择要查看CRC校验码的文件。

2、然后鼠标右击该文件，在d出的选项中选择“添加到xx.rar”。

3、成功以后，会在选中的那个目录生成一个与选择文件同名的rar压缩文件，双击打开该压缩文件。

4、压棚衫吵缩文件打开后会发现个名为CRC32的项目，那下面的一串数字就是这个文件的CRC32校验码，这个是十六进制的。

5、如果需要查看很多文件的CRC32校验码，可以将这些文塌简件一次性打包成rar，然后打开新生产的rar压缩包，这样在对应文件后面的CRC32列下面就会有相链侍应的CRC32校验么。

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