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      EEPW首頁 > 嵌入式系統(tǒng) > 設(shè)計應(yīng)用 > CRC校驗原理與程序設(shè)計――(RS485總線系統(tǒng)應(yīng)用之1

      CRC校驗原理與程序設(shè)計――(RS485總線系統(tǒng)應(yīng)用之1

      作者: 時間:2016-09-12 來源:網(wǎng)絡(luò) 收藏

      0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,

      0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,

      0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,

      0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,

      0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,

      0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,

      0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,

      0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,

      0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,

      0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,

      0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,

      0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,

      0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,

      0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,

      0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,

      0x43, 0x83, 0x41, 0x81, 0x80, 0x40 } ;

      static unsigned char auchCRCLo[] = {

      0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,

      0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,

      0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,

      0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,

      0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,

      0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,

      0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,

      0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,

      0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,

      0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,

      0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,

      0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,

      0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,

      0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,

      0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,

      0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,

      0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,

      0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,

      0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,

      0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,

      0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,

      0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,

      0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,

      0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,

      0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,

      0x80, 0x41, 0x00, 0xC1, 0x81, 0x40 } ;

      3.1.2 用VB編寫的程序

      Private Function CRC16(data() As Byte) As String

      Dim CRC16Hi As Byte

      Dim CRC16Lo As Byte

      CRC16Hi = HFF

      CRC16Lo = HFF

      Dim i As Integer

      Dim iIndex As Long

      For i = 0 To UBound(data)

      iIndex = CRC16Lo Xor data(i)

      CRC16Lo = CRC16Hi Xor GetCRCLo(iIndex) ’低位處理

      CRC16Hi = GetCRCHi(iIndex) ’高位處理

      Next i

      Dim ReturnData(1) As Byte

      ReturnData(0) = CRC16Hi ’CRC高位

      ReturnData(1) = CRC16Lo ’CRC低位

      CRC16 = ReturnData

      End Function

      Function GetCRCHi(Ind As Long) As Byte ’CRC高位字節(jié)值表

      GetCRCHi = Choose(Ind + 1,_

      H00, HC0, HC1, H01, HC3, H03, H02, HC2, HC6, H06,_

      H07, HC7, H05, HC5, HC4, H04, HCC, H0C, H0D, HCD,_

      H0F, HCF, HCE, H0E, H0A, HCA, HCB, H0B, HC9, H09,_

      H08, HC8, HD8, H18, H19, HD9, H1B, HDB, HDA, H1A,_

      H1E, HDE, HDF, H1F, HDD, H1D, H1C, HDC, H14, HD4,_

      HD5, H15, HD7, H17, H16, HD6, HD2, H12, H13, HD3,_

      H11, HD1, HD0, H10, HF0, H30, H31, HF1, H33, HF3,_

      HF2, H32, H36, HF6, HF7, H37, HF5, H35, H34, HF4,_

      H3C, HFC, HFD, H3D, HFF, H3F, H3E, HFE, HFA, H3A,_

      H3B, HFB, H39, HF9, HF8, H38, H28, HE8, HE9, H29,_

      HEB, H2B, H2A, HEA, HEE, H2E, H2F, HEF, H2D, HED,_

      HEC, H2C, HE4, H24, H25, HE5, H27, HE7, HE6, H26,_

      H22, HE2, HE3, H23, HE1, H21, H20, HE0, HA0, H60,_



      關(guān)鍵詞: CRC校驗 RS485總線

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