CRC16校验类

CRC16校验类

代码
/// <summary>
/// CRC16校验类
/// </summary>
public class CRC16Verify
{
/// <summary>
/// CRC16表
/// </summary>
private UInt16[] CRC16Table = new UInt16[256]
{
/* CRC16 余式表 */
0x0000,0x1021,0x2042,0x3063,0x4084,0x50A5,0x60C6,0x70E7,
0x8108,0x9129,0xA14A,0xB16B,0xC18C,0xD1AD,0xE1CE,0xF1EF,
0x1231,0x0210,0x3273,0x2252,0x52B5,0x4294,0x72F7,0x62D6,
0x9339,0x8318,0xB37B,0xA35A,0xD3BD,0xC39C,0xF3FF,0xE3DE,
0x2462,0x3443,0x0420,0x1401,0x64E6,0x74C7,0x44A4,0x5485,
0xA56A,0xB54B,0x8528,0x9509,0xE5EE,0xF5CF,0xC5AC,0xD58D,
0x3653,0x2672,0x1611,0x0630,0x76D7,0x66F6,0x5695,0x46B4,
0xB75B,0xA77A,0x9719,0x8738,0xF7DF,0xE7FE,0xD79D,0xC7BC,
0x48C4,0x58E5,0x6886,0x78A7,0x0840,0x1861,0x2802,0x3823,
0xC9CC,0xD9ED,0xE98E,0xF9AF,0x8948,0x9969,0xA90A,0xB92B,
0x5AF5,0x4AD4,0x7AB7,0x6A96,0x1A71,0x0A50,0x3A33,0x2A12,
0xDBFD,0xCBDC,0xFBBF,0xEB9E,0x9B79,0x8B58,0xBB3B,0xAB1A,
0x6CA6,0x7C87,0x4CE4,0x5CC5,0x2C22,0x3C03,0x0C60,0x1C41,
0xEDAE,0xFD8F,0xCDEC,0xDDCD,0xAD2A,0xBD0B,0x8D68,0x9D49,
0x7E97,0x6EB6,0x5ED5,0x4EF4,0x3E13,0x2E32,0x1E51,0x0E70,
0xFF9F,0xEFBE,0xDFDD,0xCFFC,0xBF1B,0xAF3A,0x9F59,0x8F78,
0x9188,0x81A9,0xB1CA,0xA1EB,0xD10C,0xC12D,0xF14E,0xE16F,
0x1080,0x00A1,0x30C2,0x20E3,0x5004,0x4025,0x7046,0x6067,
0x83B9,0x9398,0xA3FB,0xB3DA,0xC33D,0xD31C,0xE37F,0xF35E,
0x02B1,0x1290,0x22F3,0x32D2,0x4235,0x5214,0x6277,0x7256,
0xB5EA,0xA5CB,0x95A8,0x8589,0xF56E,0xE54F,0xD52C,0xC50D,
0x34E2,0x24C3,0x14A0,0x0481,0x7466,0x6447,0x5424,0x4405,
0xA7DB,0xB7FA,0x8799,0x97B8,0xE75F,0xF77E,0xC71D,0xD73C,
0x26D3,0x36F2,0x0691,0x16B0,0x6657,0x7676,0x4615,0x5634,
0xD94C,0xC96D,0xF90E,0xE92F,0x99C8,0x89E9,0xB98A,0xA9AB,
0x5844,0x4865,0x7806,0x6827,0x18C0,0x08E1,0x3882,0x28A3,
0xCB7D,0xDB5C,0xEB3F,0xFB1E,0x8BF9,0x9BD8,0xABBB,0xBB9A,
0x4A75,0x5A54,0x6A37,0x7A16,0x0AF1,0x1AD0,0x2AB3,0x3A92,
0xFD2E,0xED0F,0xDD6C,0xCD4D,0xBDAA,0xAD8B,0x9DE8,0x8DC9,
0x7C26,0x6C07,0x5C64,0x4C45,0x3CA2,0x2C83,0x1CE0,0x0CC1,
0xEF1F,0xFF3E,0xCF5D,0xDF7C,0xAF9B,0xBFBA,0x8FD9,0x9FF8,
0x6E17,0x7E36,0x4E55,0x5E74,0x2E93,0x3EB2,0x0ED1,0x1EF0
};

/// <summary>
/// CRC16校验码取得
/// </summary>
/// <param name="pcrc"></param>
/// <returns></returns>
public UInt16 CRC16Code(byte[] pcrc)
{
UInt16 crc16
= 0;

for (int i = 0; i < pcrc.Length; ++i)
{
crc16
= (UInt16)((crc16 << 8) ^ CRC16Table[((crc16 >> 8) ^ pcrc[i])]);
}
return crc16;
}

/// <summary>
/// 校验码比较16进制字符串
/// </summary>
/// <param name="dataInfo"></param>
/// <returns></returns>
public bool Verify16(byte[] dataInfo)
{
byte[] data = new byte[dataInfo.Length - 2];
byte[] verifyCode = new byte[2];
for (int i = 0; i < dataInfo.Length; ++i)
{
if (i < dataInfo.Length - 2)
{
data[i]
= dataInfo[i];
}
else
{
verifyCode[i
- dataInfo.Length + 2] = dataInfo[i];
}
}

UInt16 result
= CRC16Code(data);
if (result == ByteArray16ToUInt(verifyCode))
{
return true;
}

return false;
}

/// <summary>
/// 校验码比较10进制字符串
/// </summary>
/// <param name="dataInfo"></param>
/// <returns></returns>
public bool Verify10(byte[] dataInfo)
{
byte[] data = new byte[dataInfo.Length - 2];
byte[] verifyCode = new byte[2];
for (int i = 0; i < dataInfo.Length; ++i)
{
if (i < dataInfo.Length - 2)
{
data[i]
= dataInfo[i];
}
else
{
verifyCode[i
- dataInfo.Length + 2] = dataInfo[i];
}
}

UInt16 result
= CRC16Code(data);
if (result == ByteArray10ToUInt(verifyCode))
{
return true;
}

return false;
}

/// <summary>
/// 字节流转数字,16进制字符串
/// </summary>
/// <param name="verifyCode"></param>
/// <returns></returns>
private UInt16 ByteArray16ToUInt(Byte[] verifyCode)
{
string result = string.Empty;
for (int i = 0; i < verifyCode.Length; ++i)
{
string strTemp = verifyCode[i].ToString("X");
if (1 == strTemp.Length)
{
strTemp
= strTemp.Insert(0, "0");
}
result
+= strTemp;
}

return Convert.ToUInt16(result, 16);
}

/// <summary>
/// 字节流转数字,10进制字符串
/// </summary>
/// <param name="verifyCode"></param>
/// <returns></returns>
private UInt16 ByteArray10ToUInt(byte[] verifyCode)
{
return BitConverter.ToUInt16(verifyCode, 0);
}
}

 

posted @ 2010-07-05 16:59  gllg  阅读(549)  评论(0编辑  收藏  举报