1. 概述

在上一篇博客中分析了crc的原理连接: 图解crc校验，crc8， crc16， crc32， crc24 用 c语言和python实现.
在最后实现部分，只是简单的讲CRC24的源码放在了后面，距离咱们作一个工具的目标还有距离，这篇文章就是将咱们想法实现了，作一个工具，随时均可以用的。

python

闲话很少说，先上一张效果图（PS：这只是初版，只有基础的计算，还有不少功能在完善中）：

这里的测试数据是：

git

00 00 00 00 02 00 44 00 02 10 00 25 00 28 0c 00 10 00 02 49 74 36 00 00 00 00 00 00 00 00 00 00 00 00 00 00 10 00 02 49 74 36 48 55 5c 07 7c ef 00 81 00 00 e1 88 01 31 00 00 00 00 10 00 03 96 64 34 00 02 03 00 02 00 01 01 01 00 21 c0 80 73 10 27 00 00 b6 b5 f7 4f b7 65 9a f8 5b 01 ef be 00 00 00 00 00 00 00 00 00 c8 f5 f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00github

你们能够在网上随便找个CRC计算工具，来算下确定是正确的。

工具

2. 实现

这里用到的都是比较简单的控件，用来显示CRC项的QTreeWidget，显示描述和现实计算结果的QTextBrowser，输入内容的QTextEdit，选择输入格式的QRadioButton，开始计算的pushButton等等。
代码不少，这里就只是把计算CRC的部分贴出来了，整个工程放在了github上面，须要的请自取。
测试

github完整代码: github https://github.com/hellomyself1/crc-calculate.url

crc table以下：spa

# -*- coding: utf-8 -*-


# #######crc table###################


# CRC table for the CRC-32. */
# The poly is 0x4C11DB7 (x^32+ x^26 + x^23 + x^22 + x^16 + x^12 + x^11
# + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1)
crc32_table = [
    0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
    0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
    0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
    0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
    0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
    0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
    0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
    0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
    0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
    0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
    0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
    0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
    0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
    0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
    0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
    0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
    0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
    0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
    0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
    0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
    0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
    0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
    0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
    0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
    0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
    0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
    0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
    0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
    0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
    0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
    0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
    0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
    0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
    0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
    0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
    0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
    0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
    0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
    0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
    0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
    0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
    0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
    0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D
]  # 256

# CRC table for the CRC-24.
# The poly is 0x800063 (x^24 + x^23 + x^6 + x^5 + x + 1)
# This table for little-endian CRC computation.

crc24_table = [
    0x00000000, 0x00848401, 0x00850801, 0x00018c00, 0x00861001, 0x00029400,
    0x00031800, 0x00879c01, 0x00802001, 0x0004a400, 0x00052800, 0x0081ac01,
    0x00063000, 0x0082b401, 0x00833801, 0x0007bc00, 0x008c4001, 0x0008c400,
    0x00094800, 0x008dcc01, 0x000a5000, 0x008ed401, 0x008f5801, 0x000bdc00,
    0x000c6000, 0x0088e401, 0x00896801, 0x000dec00, 0x008a7001, 0x000ef400,
    0x000f7800, 0x008bfc01, 0x00948001, 0x00100400, 0x00118800, 0x00950c01,
    0x00129000, 0x00961401, 0x00979801, 0x00131c00, 0x0014a000, 0x00902401,
    0x0091a801, 0x00152c00, 0x0092b001, 0x00163400, 0x0017b800, 0x00933c01,
    0x0018c000, 0x009c4401, 0x009dc801, 0x00194c00, 0x009ed001, 0x001a5400,
    0x001bd800, 0x009f5c01, 0x0098e001, 0x001c6400, 0x001de800, 0x00996c01,
    0x001ef000, 0x009a7401, 0x009bf801, 0x001f7c00, 0x00a50001, 0x00218400,
    0x00200800, 0x00a48c01, 0x00231000, 0x00a79401, 0x00a61801, 0x00229c00,
    0x00252000, 0x00a1a401, 0x00a02801, 0x0024ac00, 0x00a33001, 0x0027b400,
    0x00263800, 0x00a2bc01, 0x00294000, 0x00adc401, 0x00ac4801, 0x0028cc00,
    0x00af5001, 0x002bd400, 0x002a5800, 0x00aedc01, 0x00a96001, 0x002de400,
    0x002c6800, 0x00a8ec01, 0x002f7000, 0x00abf401, 0x00aa7801, 0x002efc00,
    0x00318000, 0x00b50401, 0x00b48801, 0x00300c00, 0x00b79001, 0x00331400,
    0x00329800, 0x00b61c01, 0x00b1a001, 0x00352400, 0x0034a800, 0x00b02c01,
    0x0037b000, 0x00b33401, 0x00b2b801, 0x00363c00, 0x00bdc001, 0x00394400,
    0x0038c800, 0x00bc4c01, 0x003bd000, 0x00bf5401, 0x00bed801, 0x003a5c00,
    0x003de000, 0x00b96401, 0x00b8e801, 0x003c6c00, 0x00bbf001, 0x003f7400,
    0x003ef800, 0x00ba7c01, 0x00c60001, 0x00428400, 0x00430800, 0x00c78c01,
    0x00401000, 0x00c49401, 0x00c51801, 0x00419c00, 0x00462000, 0x00c2a401,
    0x00c32801, 0x0047ac00, 0x00c03001, 0x0044b400, 0x00453800, 0x00c1bc01,
    0x004a4000, 0x00cec401, 0x00cf4801, 0x004bcc00, 0x00cc5001, 0x0048d400,
    0x00495800, 0x00cddc01, 0x00ca6001, 0x004ee400, 0x004f6800, 0x00cbec01,
    0x004c7000, 0x00c8f401, 0x00c97801, 0x004dfc00, 0x00528000, 0x00d60401,
    0x00d78801, 0x00530c00, 0x00d49001, 0x00501400, 0x00519800, 0x00d51c01,
    0x00d2a001, 0x00562400, 0x0057a800, 0x00d32c01, 0x0054b000, 0x00d03401,
    0x00d1b801, 0x00553c00, 0x00dec001, 0x005a4400, 0x005bc800, 0x00df4c01,
    0x0058d000, 0x00dc5401, 0x00ddd801, 0x00595c00, 0x005ee000, 0x00da6401,
    0x00dbe801, 0x005f6c00, 0x00d8f001, 0x005c7400, 0x005df800, 0x00d97c01,
    0x00630000, 0x00e78401, 0x00e60801, 0x00628c00, 0x00e51001, 0x00619400,
    0x00601800, 0x00e49c01, 0x00e32001, 0x0067a400, 0x00662800, 0x00e2ac01,
    0x00653000, 0x00e1b401, 0x00e03801, 0x0064bc00, 0x00ef4001, 0x006bc400,
    0x006a4800, 0x00eecc01, 0x00695000, 0x00edd401, 0x00ec5801, 0x0068dc00,
    0x006f6000, 0x00ebe401, 0x00ea6801, 0x006eec00, 0x00e97001, 0x006df400,
    0x006c7800, 0x00e8fc01, 0x00f78001, 0x00730400, 0x00728800, 0x00f60c01,
    0x00719000, 0x00f51401, 0x00f49801, 0x00701c00, 0x0077a000, 0x00f32401,
    0x00f2a801, 0x00762c00, 0x00f1b001, 0x00753400, 0x0074b800, 0x00f03c01,
    0x007bc000, 0x00ff4401, 0x00fec801, 0x007a4c00, 0x00fdd001, 0x00795400,
    0x0078d800, 0x00fc5c01, 0x00fbe001, 0x007f6400, 0x007ee800, 0x00fa6c01,
    0x007df000, 0x00f97401, 0x00f8f801, 0x007c7c00
]  # 256

# CRC table for the CRC-16.
# The poly is 0x1021 (x^16 + x^12 + x^5 + 1)
crc16_table = [
    0X0000, 0X1189, 0X2312, 0X329B, 0X4624, 0X57AD, 0X6536, 0X74BF,
    0X8C48, 0X9DC1, 0XAF5A, 0XBED3, 0XCA6C, 0XDBE5, 0XE97E, 0XF8F7,
    0X1081, 0X0108, 0X3393, 0X221A, 0X56A5, 0X472C, 0X75B7, 0X643E,
    0X9CC9, 0X8D40, 0XBFDB, 0XAE52, 0XDAED, 0XCB64, 0XF9FF, 0XE876,
    0X2102, 0X308B, 0X0210, 0X1399, 0X6726, 0X76AF, 0X4434, 0X55BD,
    0XAD4A, 0XBCC3, 0X8E58, 0X9FD1, 0XEB6E, 0XFAE7, 0XC87C, 0XD9F5,
    0X3183, 0X200A, 0X1291, 0X0318, 0X77A7, 0X662E, 0X54B5, 0X453C,
    0XBDCB, 0XAC42, 0X9ED9, 0X8F50, 0XFBEF, 0XEA66, 0XD8FD, 0XC974,
    0X4204, 0X538D, 0X6116, 0X709F, 0X0420, 0X15A9, 0X2732, 0X36BB,
    0XCE4C, 0XDFC5, 0XED5E, 0XFCD7, 0X8868, 0X99E1, 0XAB7A, 0XBAF3,
    0X5285, 0X430C, 0X7197, 0X601E, 0X14A1, 0X0528, 0X37B3, 0X263A,
    0XDECD, 0XCF44, 0XFDDF, 0XEC56, 0X98E9, 0X8960, 0XBBFB, 0XAA72,
    0X6306, 0X728F, 0X4014, 0X519D, 0X2522, 0X34AB, 0X0630, 0X17B9,
    0XEF4E, 0XFEC7, 0XCC5C, 0XDDD5, 0XA96A, 0XB8E3, 0X8A78, 0X9BF1,
    0X7387, 0X620E, 0X5095, 0X411C, 0X35A3, 0X242A, 0X16B1, 0X0738,
    0XFFCF, 0XEE46, 0XDCDD, 0XCD54, 0XB9EB, 0XA862, 0X9AF9, 0X8B70,
    0X8408, 0X9581, 0XA71A, 0XB693, 0XC22C, 0XD3A5, 0XE13E, 0XF0B7,
    0X0840, 0X19C9, 0X2B52, 0X3ADB, 0X4E64, 0X5FED, 0X6D76, 0X7CFF,
    0X9489, 0X8500, 0XB79B, 0XA612, 0XD2AD, 0XC324, 0XF1BF, 0XE036,
    0X18C1, 0X0948, 0X3BD3, 0X2A5A, 0X5EE5, 0X4F6C, 0X7DF7, 0X6C7E,
    0XA50A, 0XB483, 0X8618, 0X9791, 0XE32E, 0XF2A7, 0XC03C, 0XD1B5,
    0X2942, 0X38CB, 0X0A50, 0X1BD9, 0X6F66, 0X7EEF, 0X4C74, 0X5DFD,
    0XB58B, 0XA402, 0X9699, 0X8710, 0XF3AF, 0XE226, 0XD0BD, 0XC134,
    0X39C3, 0X284A, 0X1AD1, 0X0B58, 0X7FE7, 0X6E6E, 0X5CF5, 0X4D7C,
    0XC60C, 0XD785, 0XE51E, 0XF497, 0X8028, 0X91A1, 0XA33A, 0XB2B3,
    0X4A44, 0X5BCD, 0X6956, 0X78DF, 0X0C60, 0X1DE9, 0X2F72, 0X3EFB,
    0XD68D, 0XC704, 0XF59F, 0XE416, 0X90A9, 0X8120, 0XB3BB, 0XA232,
    0X5AC5, 0X4B4C, 0X79D7, 0X685E, 0X1CE1, 0X0D68, 0X3FF3, 0X2E7A,
    0XE70E, 0XF687, 0XC41C, 0XD595, 0XA12A, 0XB0A3, 0X8238, 0X93B1,
    0X6B46, 0X7ACF, 0X4854, 0X59DD, 0X2D62, 0X3CEB, 0X0E70, 0X1FF9,
    0XF78F, 0XE606, 0XD49D, 0XC514, 0XB1AB, 0XA022, 0X92B9, 0X8330,
    0X7BC7, 0X6A4E, 0X58D5, 0X495C, 0X3DE3, 0X2C6A, 0X1EF1, 0X0F78
]  # 256


# CRC table for the CRC-8.
# The poly is 0x31 (x^8 + x^5 + x^4 + 1)
crc8_table = [
    0x00, 0x5e, 0xbc, 0xe2, 0x61, 0x3f, 0xdd, 0x83,
    0xc2, 0x9c, 0x7e, 0x20, 0xa3, 0xfd, 0x1f, 0x41,
    0x9d, 0xc3, 0x21, 0x7f, 0xfc, 0xa2, 0x40, 0x1e,
    0x5f, 0x01, 0xe3, 0xbd, 0x3e, 0x60, 0x82, 0xdc,
    0x23, 0x7d, 0x9f, 0xc1, 0x42, 0x1c, 0xfe, 0xa0,
    0xe1, 0xbf, 0x5d, 0x03, 0x80, 0xde, 0x3c, 0x62,
    0xbe, 0xe0, 0x02, 0x5c, 0xdf, 0x81, 0x63, 0x3d,
    0x7c, 0x22, 0xc0, 0x9e, 0x1d, 0x43, 0xa1, 0xff,
    0x46, 0x18, 0xfa, 0xa4, 0x27, 0x79, 0x9b, 0xc5,
    0x84, 0xda, 0x38, 0x66, 0xe5, 0xbb, 0x59, 0x07,
    0xdb, 0x85, 0x67, 0x39, 0xba, 0xe4, 0x06, 0x58,
    0x19, 0x47, 0xa5, 0xfb, 0x78, 0x26, 0xc4, 0x9a,
    0x65, 0x3b, 0xd9, 0x87, 0x04, 0x5a, 0xb8, 0xe6,
    0xa7, 0xf9, 0x1b, 0x45, 0xc6, 0x98, 0x7a, 0x24,
    0xf8, 0xa6, 0x44, 0x1a, 0x99, 0xc7, 0x25, 0x7b,
    0x3a, 0x64, 0x86, 0xd8, 0x5b, 0x05, 0xe7, 0xb9,
    0x8c, 0xd2, 0x30, 0x6e, 0xed, 0xb3, 0x51, 0x0f,
    0x4e, 0x10, 0xf2, 0xac, 0x2f, 0x71, 0x93, 0xcd,
    0x11, 0x4f, 0xad, 0xf3, 0x70, 0x2e, 0xcc, 0x92,
    0xd3, 0x8d, 0x6f, 0x31, 0xb2, 0xec, 0x0e, 0x50,
    0xaf, 0xf1, 0x13, 0x4d, 0xce, 0x90, 0x72, 0x2c,
    0x6d, 0x33, 0xd1, 0x8f, 0x0c, 0x52, 0xb0, 0xee,
    0x32, 0x6c, 0x8e, 0xd0, 0x53, 0x0d, 0xef, 0xb1,
    0xf0, 0xae, 0x4c, 0x12, 0x91, 0xcf, 0x2d, 0x73,
    0xca, 0x94, 0x76, 0x28, 0xab, 0xf5, 0x17, 0x49,
    0x08, 0x56, 0xb4, 0xea, 0x69, 0x37, 0xd5, 0x8b,
    0x57, 0x09, 0xeb, 0xb5, 0x36, 0x68, 0x8a, 0xd4,
    0x95, 0xcb, 0x29, 0x77, 0xf4, 0xaa, 0x48, 0x16,
    0xe9, 0xb7, 0x55, 0x0b, 0x88, 0xd6, 0x34, 0x6a,
    0x2b, 0x75, 0x97, 0xc9, 0x4a, 0x14, 0xf6, 0xa8,
    0x74, 0x2a, 0xc8, 0x96, 0x15, 0x4b, 0xa9, 0xf7,
    0xb6, 0xe8, 0x0a, 0x54, 0xd7, 0x89, 0x6b, 0x35
]

crc计算的py以下：.net

# -*- coding: utf-8 -*-

import crc_table


class CrcCal:
    def __init__(self):
        pass

    def crc8(self, octets):
        crc = 0 & 0x00FFFFFF
        try:
            for octet in octets:
                crc = crc ^ octet
                crc = crc_table.crc8_table[crc & 0x0FF]
        except:
            pass
        return crc & 0x00FFFFFF

    def crc16(self, octets):
        crc = 0 & 0x00FFFFFF
        try:
            for octet in octets:
                crc = crc ^ octet
                crc = (crc >> 8) ^ crc_table.crc16_table[crc & 0x0FF]
        except:
            pass
        return crc & 0x00FFFFFF

    def crc24(self, octets):
        crc = 0 & 0x00FFFFFF
        try:
            for octet in octets:
                crc = crc ^ octet
                crc = (crc >> 8) ^ crc_table.crc24_table[crc & 0x0FF]
        except:
            pass
        return crc & 0x00FFFFFF

    def crc32(self, octets):
        crc = 0 & 0x00FFFFFF
        try:
            for octet in octets:
                crc = crc ^ octet
                crc = ((crc >> 8) & 0x00FFFFFF) ^ crc_table.crc32_table[crc & 0x0FF]
        except:
            pass
        return crc

好了，这里就放了主要的crc计算的py，若是你们须要源码，能够用上面的连接自取，谢谢，若是有什么建议，欢迎提出。3d