crc16 校验算法 C#
- 封装一个静态类
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks; namespace TestApp
{
public class CRC
{ #region CRC16
public static byte[] CRC16(byte[] data)
{
int len = data.Length;
if (len > )
{
ushort crc = 0xFFFF; for (int i = ; i < len; i++)
{
crc = (ushort)(crc ^ (data[i]));
for (int j = ; j < ; j++)
{
crc = (crc & ) != ? (ushort)((crc >> ) ^ 0xA001) : (ushort)(crc >> );
}
}
byte hi = (byte)((crc & 0xFF00) >> ); //高位置
byte lo = (byte)(crc & 0x00FF); //低位置 return new byte[] { hi, lo };
}
return new byte[] { , };
}
#endregion #region ToCRC16
public static string ToCRC16(string content)
{
return ToCRC16(content, Encoding.UTF8);
} public static string ToCRC16(string content, bool isReverse)
{
return ToCRC16(content, Encoding.UTF8, isReverse);
} public static string ToCRC16(string content, Encoding encoding)
{
return ByteToString(CRC16(encoding.GetBytes(content)), true);
} public static string ToCRC16(string content, Encoding encoding, bool isReverse)
{
return ByteToString(CRC16(encoding.GetBytes(content)), isReverse);
} public static string ToCRC16(byte[] data)
{
return ByteToString(CRC16(data), true);
} public static string ToCRC16(byte[] data, bool isReverse)
{
return ByteToString(CRC16(data), isReverse);
}
#endregion #region ToModbusCRC16
public static string ToModbusCRC16(string s)
{
return ToModbusCRC16(s, true);
} public static string ToModbusCRC16(string s, bool isReverse)
{
return ByteToString(CRC16(StringToHexByte(s)), isReverse);
} public static string ToModbusCRC16(byte[] data)
{
return ToModbusCRC16(data, true);
} public static string ToModbusCRC16(byte[] data, bool isReverse)
{
return ByteToString(CRC16(data), isReverse);
}
#endregion #region ByteToString
public static string ByteToString(byte[] arr, bool isReverse)
{
try
{
byte hi = arr[], lo = arr[];
return Convert.ToString(isReverse ? hi + lo * 0x100 : hi * 0x100 + lo, ).ToUpper().PadLeft(, '');
}
catch (Exception ex) { throw (ex); }
} public static string ByteToString(byte[] arr)
{
try
{
return ByteToString(arr, true);
}
catch (Exception ex) { throw (ex); }
}
#endregion #region StringToHexString
public static string StringToHexString(string str)
{
StringBuilder s = new StringBuilder();
foreach (short c in str.ToCharArray())
{
s.Append(c.ToString("X4"));
}
return s.ToString();
}
#endregion #region StringToHexByte
private static string ConvertChinese(string str)
{
StringBuilder s = new StringBuilder();
foreach (short c in str.ToCharArray())
{
if (c <= || c >= )
{
s.Append(c.ToString("X4"));
}
else
{
s.Append((char)c);
}
}
return s.ToString();
} private static string FilterChinese(string str)
{
StringBuilder s = new StringBuilder();
foreach (short c in str.ToCharArray())
{
if (c > && c < )
{
s.Append((char)c);
}
}
return s.ToString();
} /// <summary>
/// 字符串转16进制字符数组
/// </summary>
/// <param name="hex"></param>
/// <returns></returns>
public static byte[] StringToHexByte(string str)
{
return StringToHexByte(str, false);
} /// <summary>
/// 字符串转16进制字符数组
/// </summary>
/// <param name="str"></param>
/// <param name="isFilterChinese">是否过滤掉中文字符</param>
/// <returns></returns>
public static byte[] StringToHexByte(string str, bool isFilterChinese)
{
string hex = isFilterChinese ? FilterChinese(str) : ConvertChinese(str); //清除所有空格
hex = hex.Replace(" ", "");
//若字符个数为奇数，补一个0
hex += hex.Length % != ? "" : ""; byte[] result = new byte[hex.Length / ];
for (int i = , c = result.Length; i < c; i++)
{
result[i] = Convert.ToByte(hex.Substring(i * , ), );
}
return result;
}
#endregion }
} - 调用测试
static void Main(string[] args)
{
string msg = "01 2C 00 00 00 00 00 00 0A 4F 4F 05 93 00 07 06 15 00 00 00 23 3D F5 7C 45 71 20 00 45 71 20 00 00 00 00 00 40 DF 70 E3 00 00 00 00 BF 8F D6 63 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3D F9 00 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 8E 47 99 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3D FC 84 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 8A FD 76 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 00 08 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 92 C7 B9 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 03 8C 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 8A A4 FD 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 07 10 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 8D EE CC 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 0A 94 45 71 20 00 45 71 20 00 00 00 00 00 00 00 00 00 00 00 00 00 BF 88 38 B0 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 0E 18 45 71 40 00 45 71 50 00 00 00 00 00 41 1F D4 4B 00 00 00 00 BF 7C 04 97 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 11 9C 45 71 70 00 45 71 70 00 00 00 00 00 41 15 7B 74 00 00 00 00 BF 8E A0 12 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00 23 3E 15 20 45 71 90 00 45 71 90 00 00 00 00 00 40 E1 D9 FE 00 00 00 00 BF 8C E5 0D 00 00 00 00 00 00 00 00 10 20 00 00 41 30 00 00";
var a = CRC.ToCRC16(msg, true); //结果为：
var b = CRC.ToCRC16(msg, false); //结果为：
var c = CRC.ToModbusCRC16(msg, true); //结果为：
var e = CRC.ToModbusCRC16(msg, false);
var d = CRC.ToCRC16("你好，我们测试一下CRC16算法", true); //结果为：
}完成。
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