1. 概述

在上一篇博客中分析了crc的原理連接: 圖解crc校驗，crc8， crc16， crc32， crc24 用 c語言和python實現.
在最後實現部分，只是簡單的講CRC24的源碼放在了後面，距離咱們作一個工具的目標還有距離，這篇文章就是將咱們想法實現了，作一個工具，隨時均可以用的。

python

閒話很少說，先上一張效果圖（PS：這只是初版，只有基礎的計算，還有不少功能在完善中）：

這裏的測試數據是：

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

你們能夠在網上隨便找個CRC計算工具，來算下確定是正確的。

工具

2. 實現

這裏用到的都是比較簡單的控件，用來顯示CRC項的QTreeWidget，顯示描述和現實計算結果的QTextBrowser，輸入內容的QTextEdit，選擇輸入格式的QRadioButton，開始計算的pushButton等等。
代碼不少，這裏就只是把計算CRC的部分貼出來了，整個工程放在了github上面，須要的請自取。
測試

github完整代碼: 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計算的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，這裏就放了主要的crc計算的py，若是你們須要源碼，能夠用上面的連接自取，謝謝，若是有什麼建議，歡迎提出。3d