- Code: Select all
Public Class Crc16
Private Shared CrcTable As UShort() = {&H0, &Hc0c1, &Hc181, &H140, &Hc301, &H3c0, _
&H280, &Hc241, &Hc601, &H6c0, &H780, &Hc741, _
&H500, &Hc5c1, &Hc481, &H440, &Hcc01, &Hcc0, _
&Hd80, &Hcd41, &Hf00, &Hcfc1, &Hce81, &He40, _
&Ha00, &Hcac1, &Hcb81, &Hb40, &Hc901, &H9c0, _
&H880, &Hc841, &Hd801, &H18c0, &H1980, &Hd941, _
&H1b00, &Hdbc1, &Hda81, &H1a40, &H1e00, &Hdec1, _
&Hdf81, &H1f40, &Hdd01, &H1dc0, &H1c80, &Hdc41, _
&H1400, &Hd4c1, &Hd581, &H1540, &Hd701, &H17c0, _
&H1680, &Hd641, &Hd201, &H12c0, &H1380, &Hd341, _
&H1100, &Hd1c1, &Hd081, &H1040, &Hf001, &H30c0, _
&H3180, &Hf141, &H3300, &Hf3c1, &Hf281, &H3240, _
&H3600, &Hf6c1, &Hf781, &H3740, &Hf501, &H35c0, _
&H3480, &Hf441, &H3c00, &Hfcc1, &Hfd81, &H3d40, _
&Hff01, &H3fc0, &H3e80, &Hfe41, &Hfa01, &H3ac0, _
&H3b80, &Hfb41, &H3900, &Hf9c1, &Hf881, &H3840, _
&H2800, &He8c1, &He981, &H2940, &Heb01, &H2bc0, _
&H2a80, &Hea41, &Hee01, &H2ec0, &H2f80, &Hef41, _
&H2d00, &Hedc1, &Hec81, &H2c40, &He401, &H24c0, _
&H2580, &He541, &H2700, &He7c1, &He681, &H2640, _
&H2200, &He2c1, &He381, &H2340, &He101, &H21c0, _
&H2080, &He041, &Ha001, &H60c0, &H6180, &Ha141, _
&H6300, &Ha3c1, &Ha281, &H6240, &H6600, &Ha6c1, _
&Ha781, &H6740, &Ha501, &H65c0, &H6480, &Ha441, _
&H6c00, &Hacc1, &Had81, &H6d40, &Haf01, &H6fc0, _
&H6e80, &Hae41, &Haa01, &H6ac0, &H6b80, &Hab41, _
&H6900, &Ha9c1, &Ha881, &H6840, &H7800, &Hb8c1, _
&Hb981, &H7940, &Hbb01, &H7bc0, &H7a80, &Hba41, _
&Hbe01, &H7ec0, &H7f80, &Hbf41, &H7d00, &Hbdc1, _
&Hbc81, &H7c40, &Hb401, &H74c0, &H7580, &Hb541, _
&H7700, &Hb7c1, &Hb681, &H7640, &H7200, &Hb2c1, _
&Hb381, &H7340, &Hb101, &H71c0, &H7080, &Hb041, _
&H5000, &H90c1, &H9181, &H5140, &H9301, &H53c0, _
&H5280, &H9241, &H9601, &H56c0, &H5780, &H9741, _
&H5500, &H95c1, &H9481, &H5440, &H9c01, &H5cc0, _
&H5d80, &H9d41, &H5f00, &H9fc1, &H9e81, &H5e40, _
&H5a00, &H9ac1, &H9b81, &H5b40, &H9901, &H59c0, _
&H5880, &H9841, &H8801, &H48c0, &H4980, &H8941, _
&H4b00, &H8bc1, &H8a81, &H4a40, &H4e00, &H8ec1, _
&H8f81, &H4f40, &H8d01, &H4dc0, &H4c80, &H8c41, _
&H4400, &H84c1, &H8581, &H4540, &H8701, &H47c0, _
&H4680, &H8641, &H8201, &H42c0, &H4380, &H8341, _
&H4100, &H81c1, &H8081, &H4040}
Public Shared Function ComputeCrc(data As Byte()) As UInt16
Dim crc As UShort = &Hffff
For Each datum As Byte In data
crc = CUShort((crc >> 8) Xor CrcTable((crc Xor datum) And &Hff))
Next
Return crc
End Function
End Class
C# Version:
- Code: Select all
public class Crc16
{
private static ushort[] CrcTable = {
0X0000, 0XC0C1, 0XC181, 0X0140, 0XC301, 0X03C0, 0X0280, 0XC241,
0XC601, 0X06C0, 0X0780, 0XC741, 0X0500, 0XC5C1, 0XC481, 0X0440,
0XCC01, 0X0CC0, 0X0D80, 0XCD41, 0X0F00, 0XCFC1, 0XCE81, 0X0E40,
0X0A00, 0XCAC1, 0XCB81, 0X0B40, 0XC901, 0X09C0, 0X0880, 0XC841,
0XD801, 0X18C0, 0X1980, 0XD941, 0X1B00, 0XDBC1, 0XDA81, 0X1A40,
0X1E00, 0XDEC1, 0XDF81, 0X1F40, 0XDD01, 0X1DC0, 0X1C80, 0XDC41,
0X1400, 0XD4C1, 0XD581, 0X1540, 0XD701, 0X17C0, 0X1680, 0XD641,
0XD201, 0X12C0, 0X1380, 0XD341, 0X1100, 0XD1C1, 0XD081, 0X1040,
0XF001, 0X30C0, 0X3180, 0XF141, 0X3300, 0XF3C1, 0XF281, 0X3240,
0X3600, 0XF6C1, 0XF781, 0X3740, 0XF501, 0X35C0, 0X3480, 0XF441,
0X3C00, 0XFCC1, 0XFD81, 0X3D40, 0XFF01, 0X3FC0, 0X3E80, 0XFE41,
0XFA01, 0X3AC0, 0X3B80, 0XFB41, 0X3900, 0XF9C1, 0XF881, 0X3840,
0X2800, 0XE8C1, 0XE981, 0X2940, 0XEB01, 0X2BC0, 0X2A80, 0XEA41,
0XEE01, 0X2EC0, 0X2F80, 0XEF41, 0X2D00, 0XEDC1, 0XEC81, 0X2C40,
0XE401, 0X24C0, 0X2580, 0XE541, 0X2700, 0XE7C1, 0XE681, 0X2640,
0X2200, 0XE2C1, 0XE381, 0X2340, 0XE101, 0X21C0, 0X2080, 0XE041,
0XA001, 0X60C0, 0X6180, 0XA141, 0X6300, 0XA3C1, 0XA281, 0X6240,
0X6600, 0XA6C1, 0XA781, 0X6740, 0XA501, 0X65C0, 0X6480, 0XA441,
0X6C00, 0XACC1, 0XAD81, 0X6D40, 0XAF01, 0X6FC0, 0X6E80, 0XAE41,
0XAA01, 0X6AC0, 0X6B80, 0XAB41, 0X6900, 0XA9C1, 0XA881, 0X6840,
0X7800, 0XB8C1, 0XB981, 0X7940, 0XBB01, 0X7BC0, 0X7A80, 0XBA41,
0XBE01, 0X7EC0, 0X7F80, 0XBF41, 0X7D00, 0XBDC1, 0XBC81, 0X7C40,
0XB401, 0X74C0, 0X7580, 0XB541, 0X7700, 0XB7C1, 0XB681, 0X7640,
0X7200, 0XB2C1, 0XB381, 0X7340, 0XB101, 0X71C0, 0X7080, 0XB041,
0X5000, 0X90C1, 0X9181, 0X5140, 0X9301, 0X53C0, 0X5280, 0X9241,
0X9601, 0X56C0, 0X5780, 0X9741, 0X5500, 0X95C1, 0X9481, 0X5440,
0X9C01, 0X5CC0, 0X5D80, 0X9D41, 0X5F00, 0X9FC1, 0X9E81, 0X5E40,
0X5A00, 0X9AC1, 0X9B81, 0X5B40, 0X9901, 0X59C0, 0X5880, 0X9841,
0X8801, 0X48C0, 0X4980, 0X8941, 0X4B00, 0X8BC1, 0X8A81, 0X4A40,
0X4E00, 0X8EC1, 0X8F81, 0X4F40, 0X8D01, 0X4DC0, 0X4C80, 0X8C41,
0X4400, 0X84C1, 0X8581, 0X4540, 0X8701, 0X47C0, 0X4680, 0X8641,
0X8201, 0X42C0, 0X4380, 0X8341, 0X4100, 0X81C1, 0X8081, 0X4040 };
public static UInt16 ComputeCrc(byte[] data)
{
ushort crc = 0xFFFF;
foreach (byte datum in data)
{
crc = (ushort)((crc >> 8) ^ CrcTable[(crc ^ datum) & 0xFF]);
}
return crc;
}
}