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EEPW首頁 > 嵌入式系統(tǒng) > 設計應用 > CRC校驗原理與程序設計――(RS485總線系統(tǒng)應用之1)

CRC校驗原理與程序設計――(RS485總線系統(tǒng)應用之1)

作者: 時間:2018-08-17 來源:網(wǎng)絡 收藏

本文引用地址:http://m.ptau.cn/article/201808/387091.htm

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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