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求C# CRC16 使用方法

1
悬赏园豆:5 [已解决问题] 解决于 2011-07-08 17:49

我使用的是

public class CRC16
{
public CRC16() { }
/// <summary>
/// CRCTAB 表
/// </summary>
private static ushort[] crctab = new ushort[256]{
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>
/// CRC校验公式
/// </summary>
/// <param name="crc">CRC</param>
/// <param name="cp">发送的数据序列</param>
/// <returns>新CRC</returns>
private static ushort xcrc(ushort crc, byte cp)
{
ushort t1 = 0, t2 = 0, t3 = 0, t4 = 0, t5 = 0, t6 = 0;
t1
= (ushort)(crc >> 8);
t2
= (ushort)(t1 & 0xff);
t3
= (ushort)(cp & 0xff);
t4
= (ushort)(crc << 8);
t5
= (ushort)(t2 ^ t3);
t6
= (ushort)(crctab[t5] ^ t4);
return t6;
}

/// <summary>
/// 添加CRC校验字
/// </summary>
/// <param name="bufin">信息串</param>
/// <param name="n">不包括校验字的串总长度</param>
public static void ConCRC(ref byte[] bufin, byte n)
{
ushort crc16 = 0;
byte i;
//n个数据的CRC校验
for (i = 0; i < n; i++)
{
crc16
= xcrc(crc16, bufin[i]);
}
bufin[i]
= (byte)(crc16 >> 8);
bufin[i
+ 1] = (byte)(crc16 & 0xff);
}

/// <summary>
/// CRC数据验证
/// </summary>
/// <param name="bufout">信息串</param>
/// <param name="count">接收数据总长度</param>
/// <returns>true:校验成功,false:校验失败</returns>
public static bool DataCRC(ref byte[] bufout, byte count)
{
ushort crc16 = 0;
byte i;
for (i = 0; i < (count - 2); i++)
crc16
= xcrc(crc16, bufout[i]);
if ((bufout[count - 2] == (byte)(crc16 >> 8)) && (bufout[count - 1] == (byte)(crc16 & 0xff)))
{
return true;
}
else
{
return false;
}
}
}
不知道该怎么使用,知道的朋友麻烦告知下,谢了

shrimp liao的主页 shrimp liao | 初学一级 | 园豆:135
提问于:2011-07-08 14:08
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最佳答案
1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    
class Program
    {
        
//ModBus C# CRC16校验算法
        public static int[] crc16(int[] data)
        {
            
int[] temdata = new int[data.Length + 2];
            
int xda, xdapoly;
            
int i, j, xdabit;
            xda 
= 0xFFFF;
            xdapoly 
= 0xA001;
            
for (i = 0; i < data.Length; i++)
            {
                xda 
^= data[i];
                
for (j = 0; j < 8; j++)
                {
                    xdabit 
= (int)(xda & 0x01);
                    xda 
>>= 1;
                    
if (xdabit == 1)
                        xda 
^= xdapoly;
                }
            }
            Array.Copy(data, 
0, temdata, 0, data.Length);
            temdata[temdata.Length 
- 2= (int)(xda & 0xFF);
            temdata[temdata.Length 
- 1= (int)(xda >> 8);
            
return temdata;
        }

        
static void Main(string[] args)
        {
            
int[] data = { 0103111840013 };
            
int[] d1 = crc16(data);
            Console.WriteLine(
"");
            
for (int i = 0; i < d1.Length; i++)
            {
                Console.Write(d1[i] 
+ " ");
            }
            Console.ReadKey();
        }
    }
}

收获园豆:5
一根葛根 | 菜鸟二级 |园豆:229 | 2011-07-08 16:22
虽然你的方法是对的,但不是我想要的,不过还是谢谢了
shrimp liao | 园豆:135 (初学一级) | 2011-07-08 17:49
其实我想要的就只是个使用方法,比如,传一个byte[]类型的值过来,我这个方法怎么用呢,
我也验证过了,比如 1 2 应该是 95 f5但结果仍旧返回 false。
shrimp liao | 园豆:135 (初学一级) | 2011-07-08 17:58
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