C#,Java,C -循环冗余检验：CRC-16-CCITT查表法
C#代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; namespace TestCRC
{
/// <summary>
/// 循环冗余检验：CRC-16-CCITT查表法
/// </summary>
public static partial class CRCITU
{
/// <summary>
/// 计算给定长度数据的16位CRC
/// </summary>
/// <param name="data">要计算CRC的字节数组</param>
/// <returns>CRC值</returns>
public static UInt16 GetCrc16(Byte[] data)
{ // 初始化
Int32 High = 0xFF; // 高字节
Int32 Low = 0xFF; // 低字节
if (data != null)
{
foreach (Byte b in data)
{
Int32 Index = Low ^ b;
Low = High ^ CRC16TABLE_LO[Index];
High = CRC16TABLE_HI[Index];
}
}
return (UInt16)(~((High << ) + Low)); // 取反
} /// <summary>
/// 检查给定长度数据的16位CRC是否正确
/// </summary>
/// <param name="data">要校验的字节数组</param>
/// <returns>
/// true：正确
/// false：错误
/// </returns>
/// <reamrks>
/// 字节数组最后2个字节为校验码，且低字节在前面，高字节在后面
/// </reamrks>
public static Boolean IsCrc16Good(Byte[] data)
{
// 初始化
Int32 High = 0xFF;
Int32 Low = 0xFF;
if (data != null)
{
foreach (Byte b in data)
{
Int32 Index = Low ^ b;
Low = High ^ CRC16TABLE_LO[Index];
High = CRC16TABLE_HI[Index];
}
} return (High == 0xF0 && Low == 0xB8);
} /// <summary>
/// CRC16查找表高字节
/// </summary>
private static readonly Byte[] CRC16TABLE_HI =
{
0x00, 0x11, 0x23, 0x32, 0x46, 0x57, 0x65, 0x74, 0x8C, 0x9D, 0xAF, 0xBE, 0xCA, 0xDB, 0xE9, 0xF8,
0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9C, 0x8D, 0xBF, 0xAE, 0xDA, 0xCB, 0xF9, 0xE8,
0x21, 0x30, 0x02, 0x13, 0x67, 0x76, 0x44, 0x55, 0xAD, 0xBC, 0x8E, 0x9F, 0xEB, 0xFA, 0xC8, 0xD9,
0x31, 0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xBD, 0xAC, 0x9E, 0x8F, 0xFB, 0xEA, 0xD8, 0xC9,
0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27, 0x36, 0xCE, 0xDF, 0xED, 0xFC, 0x88, 0x99, 0xAB, 0xBA,
0x52, 0x43, 0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xDE, 0xCF, 0xFD, 0xEC, 0x98, 0x89, 0xBB, 0xAA,
0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17, 0xEF, 0xFE, 0xCC, 0xDD, 0xA9, 0xB8, 0x8A, 0x9B,
0x73, 0x62, 0x50, 0x41, 0x35, 0x24, 0x16, 0x07, 0xFF, 0xEE, 0xDC, 0xCD, 0xB9, 0xA8, 0x9A, 0x8B,
0x84, 0x95, 0xA7, 0xB6, 0xC2, 0xD3, 0xE1, 0xF0, 0x08, 0x19, 0x2B, 0x3A, 0x4E, 0x5F, 0x6D, 0x7C,
0x94, 0x85, 0xB7, 0xA6, 0xD2, 0xC3, 0xF1, 0xE0, 0x18, 0x09, 0x3B, 0x2A, 0x5E, 0x4F, 0x7D, 0x6C,
0xA5, 0xB4, 0x86, 0x97, 0xE3, 0xF2, 0xC0, 0xD1, 0x29, 0x38, 0x0A, 0x1B, 0x6F, 0x7E, 0x4C, 0x5D,
0xB5, 0xA4, 0x96, 0x87, 0xF3, 0xE2, 0xD0, 0xC1, 0x39, 0x28, 0x1A, 0x0B, 0x7F, 0x6E, 0x5C, 0x4D,
0xC6, 0xD7, 0xE5, 0xF4, 0x80, 0x91, 0xA3, 0xB2, 0x4A, 0x5B, 0x69, 0x78, 0x0C, 0x1D, 0x2F, 0x3E,
0xD6, 0xC7, 0xF5, 0xE4, 0x90, 0x81, 0xB3, 0xA2, 0x5A, 0x4B, 0x79, 0x68, 0x1C, 0x0D, 0x3F, 0x2E,
0xE7, 0xF6, 0xC4, 0xD5, 0xA1, 0xB0, 0x82, 0x93, 0x6B, 0x7A, 0x48, 0x59, 0x2D, 0x3C, 0x0E, 0x1F,
0xF7, 0xE6, 0xD4, 0xC5, 0xB1, 0xA0, 0x92, 0x83, 0x7B, 0x6A, 0x58, 0x49, 0x3D, 0x2C, 0x1E, 0x0F
}; /// <summary>
/// CRC16查找表低字节
/// </summary>
private static readonly Byte[] CRC16TABLE_LO =
{
0x00, 0x89, 0x12, 0x9B, 0x24, 0xAD, 0x36, 0xBF, 0x48, 0xC1, 0x5A, 0xD3, 0x6C, 0xE5, 0x7E, 0xF7,
0x81, 0x08, 0x93, 0x1A, 0xA5, 0x2C, 0xB7, 0x3E, 0xC9, 0x40, 0xDB, 0x52, 0xED, 0x64, 0xFF, 0x76,
0x02, 0x8B, 0x10, 0x99, 0x26, 0xAF, 0x34, 0xBD, 0x4A, 0xC3, 0x58, 0xD1, 0x6E, 0xE7, 0x7C, 0xF5,
0x83, 0x0A, 0x91, 0x18, 0xA7, 0x2E, 0xB5, 0x3C, 0xCB, 0x42, 0xD9, 0x50, 0xEF, 0x66, 0xFD, 0x74,
0x04, 0x8D, 0x16, 0x9F, 0x20, 0xA9, 0x32, 0xBB, 0x4C, 0xC5, 0x5E, 0xD7, 0x68, 0xE1, 0x7A, 0xF3,
0x85, 0x0C, 0x97, 0x1E, 0xA1, 0x28, 0xB3, 0x3A, 0xCD, 0x44, 0xDF, 0x56, 0xE9, 0x60, 0xFB, 0x72,
0x06, 0x8F, 0x14, 0x9D, 0x22, 0xAB, 0x30, 0xB9, 0x4E, 0xC7, 0x5C, 0xD5, 0x6A, 0xE3, 0x78, 0xF1,
0x87, 0x0E, 0x95, 0x1C, 0xA3, 0x2A, 0xB1, 0x38, 0xCF, 0x46, 0xDD, 0x54, 0xEB, 0x62, 0xF9, 0x70,
0x08, 0x81, 0x1A, 0x93, 0x2C, 0xA5, 0x3E, 0xB7, 0x40, 0xC9, 0x52, 0xDB, 0x64, 0xED, 0x76, 0xFF,
0x89, 0x00, 0x9B, 0x12, 0xAD, 0x24, 0xBF, 0x36, 0xC1, 0x48, 0xD3, 0x5A, 0xE5, 0x6C, 0xF7, 0x7E,
0x0A, 0x83, 0x18, 0x91, 0x2E, 0xA7, 0x3C, 0xB5, 0x42, 0xCB, 0x50, 0xD9, 0x66, 0xEF, 0x74, 0xFD,
0x8B, 0x02, 0x99, 0x10, 0xAF, 0x26, 0xBD, 0x34, 0xC3, 0x4A, 0xD1, 0x58, 0xE7, 0x6E, 0xF5, 0x7C,
0x0C, 0x85, 0x1E, 0x97, 0x28, 0xA1, 0x3A, 0xB3, 0x44, 0xCD, 0x56, 0xDF, 0x60, 0xE9, 0x72, 0xFB,
0x8D, 0x04, 0x9F, 0x16, 0xA9, 0x20, 0xBB, 0x32, 0xC5, 0x4C, 0xD7, 0x5E, 0xE1, 0x68, 0xF3, 0x7A,
0x0E, 0x87, 0x1C, 0x95, 0x2A, 0xA3, 0x38, 0xB1, 0x46, 0xCF, 0x54, 0xDD, 0x62, 0xEB, 0x70, 0xF9,
0x8F, 0x06, 0x9D, 0x14, 0xAB, 0x22, 0xB9, 0x30, 0xC7, 0x4E, 0xD5, 0x5C, 0xE3, 0x6A, 0xF1, 0x78
};
}
}
C# CRC16代码
Java代码
import com.example.utils.BitConverter; /**
* 循环冗余检验：CRC-16-CCITT查表法
*/
public final class CRC16 { public static void main(String[] args) {
short result=CRC16.GetCrc16(new byte[]{1,2,3});
System.out.println(Integer.toHexString(result));
}
/**
* 计算给定长度数据的16位CRC
*
* @param data
* 要计算CRC的字节数组
* @return CRC值
*/
public static short GetCrc16(byte[] data) { // 初始化
int High = 0xFF; // 高字节
int Low = 0xFF; // 低字节
if (data != null) {
for (byte b : data) {
int Index = Low ^ b;
Low = High ^ CRC16TABLE_LO[Index];
High = CRC16TABLE_HI[Index];
}
}
return (short) (~((High << 8) + Low)); // 取反
} /**
* 检查给定长度数据的16位CRC是否正确
*
* @param data
* 要校验的字节数组
* @return true：正确 false：错误
*
* <reamrks> 字节数组最后2个字节为校验码，且低字节在前面，高字节在后面 </reamrks>
*/
public static boolean IsCrc16Good(byte[] data) {
// 初始化
int High = 0xFF;
int Low = 0xFF;
if (data != null) {
for (byte b : data) {
int Index = Low ^ b;
Low = High ^ CRC16TABLE_LO[Index];
High = CRC16TABLE_HI[Index];
}
} return (High == 0xF0 && Low == 0xB8);
} /**
* CRC16查找表高字节
*/
private static final int[] CRC16TABLE_HI = { 0x00, 0x11, 0x23, 0x32, 0x46,
0x57, 0x65, 0x74, 0x8C, 0x9D, 0xAF, 0xBE, 0xCA, 0xDB, 0xE9, 0xF8,
0x10, 0x01, 0x33, 0x22, 0x56, 0x47, 0x75, 0x64, 0x9C, 0x8D, 0xBF,
0xAE, 0xDA, 0xCB, 0xF9, 0xE8, 0x21, 0x30, 0x02, 0x13, 0x67, 0x76,
0x44, 0x55, 0xAD, 0xBC, 0x8E, 0x9F, 0xEB, 0xFA, 0xC8, 0xD9, 0x31,
0x20, 0x12, 0x03, 0x77, 0x66, 0x54, 0x45, 0xBD, 0xAC, 0x9E, 0x8F,
0xFB, 0xEA, 0xD8, 0xC9, 0x42, 0x53, 0x61, 0x70, 0x04, 0x15, 0x27,
0x36, 0xCE, 0xDF, 0xED, 0xFC, 0x88, 0x99, 0xAB, 0xBA, 0x52, 0x43,
0x71, 0x60, 0x14, 0x05, 0x37, 0x26, 0xDE, 0xCF, 0xFD, 0xEC, 0x98,
0x89, 0xBB, 0xAA, 0x63, 0x72, 0x40, 0x51, 0x25, 0x34, 0x06, 0x17,
0xEF, 0xFE, 0xCC, 0xDD, 0xA9, 0xB8, 0x8A, 0x9B, 0x73, 0x62, 0x50,
0x41, 0x35, 0x24, 0x16, 0x07, 0xFF, 0xEE, 0xDC, 0xCD, 0xB9, 0xA8,
0x9A, 0x8B, 0x84, 0x95, 0xA7, 0xB6, 0xC2, 0xD3, 0xE1, 0xF0, 0x08,
0x19, 0x2B, 0x3A, 0x4E, 0x5F, 0x6D, 0x7C, 0x94, 0x85, 0xB7, 0xA6,
0xD2, 0xC3, 0xF1, 0xE0, 0x18, 0x09, 0x3B, 0x2A, 0x5E, 0x4F, 0x7D,
0x6C, 0xA5, 0xB4, 0x86, 0x97, 0xE3, 0xF2, 0xC0, 0xD1, 0x29, 0x38,
0x0A, 0x1B, 0x6F, 0x7E, 0x4C, 0x5D, 0xB5, 0xA4, 0x96, 0x87, 0xF3,
0xE2, 0xD0, 0xC1, 0x39, 0x28, 0x1A, 0x0B, 0x7F, 0x6E, 0x5C, 0x4D,
0xC6, 0xD7, 0xE5, 0xF4, 0x80, 0x91, 0xA3, 0xB2, 0x4A, 0x5B, 0x69,
0x78, 0x0C, 0x1D, 0x2F, 0x3E, 0xD6, 0xC7, 0xF5, 0xE4, 0x90, 0x81,
0xB3, 0xA2, 0x5A, 0x4B, 0x79, 0x68, 0x1C, 0x0D, 0x3F, 0x2E, 0xE7,
0xF6, 0xC4, 0xD5, 0xA1, 0xB0, 0x82, 0x93, 0x6B, 0x7A, 0x48, 0x59,
0x2D, 0x3C, 0x0E, 0x1F, 0xF7, 0xE6, 0xD4, 0xC5, 0xB1, 0xA0, 0x92,
0x83, 0x7B, 0x6A, 0x58, 0x49, 0x3D, 0x2C, 0x1E, 0x0F }; /**
* CRC16查找表低字节
*/
private static final int[] CRC16TABLE_LO = { 0x00, 0x89, 0x12, 0x9B, 0x24,
0xAD, 0x36, 0xBF, 0x48, 0xC1, 0x5A, 0xD3, 0x6C, 0xE5, 0x7E, 0xF7,
0x81, 0x08, 0x93, 0x1A, 0xA5, 0x2C, 0xB7, 0x3E, 0xC9, 0x40, 0xDB,
0x52, 0xED, 0x64, 0xFF, 0x76, 0x02, 0x8B, 0x10, 0x99, 0x26, 0xAF,
0x34, 0xBD, 0x4A, 0xC3, 0x58, 0xD1, 0x6E, 0xE7, 0x7C, 0xF5, 0x83,
0x0A, 0x91, 0x18, 0xA7, 0x2E, 0xB5, 0x3C, 0xCB, 0x42, 0xD9, 0x50,
0xEF, 0x66, 0xFD, 0x74, 0x04, 0x8D, 0x16, 0x9F, 0x20, 0xA9, 0x32,
0xBB, 0x4C, 0xC5, 0x5E, 0xD7, 0x68, 0xE1, 0x7A, 0xF3, 0x85, 0x0C,
0x97, 0x1E, 0xA1, 0x28, 0xB3, 0x3A, 0xCD, 0x44, 0xDF, 0x56, 0xE9,
0x60, 0xFB, 0x72, 0x06, 0x8F, 0x14, 0x9D, 0x22, 0xAB, 0x30, 0xB9,
0x4E, 0xC7, 0x5C, 0xD5, 0x6A, 0xE3, 0x78, 0xF1, 0x87, 0x0E, 0x95,
0x1C, 0xA3, 0x2A, 0xB1, 0x38, 0xCF, 0x46, 0xDD, 0x54, 0xEB, 0x62,
0xF9, 0x70, 0x08, 0x81, 0x1A, 0x93, 0x2C, 0xA5, 0x3E, 0xB7, 0x40,
0xC9, 0x52, 0xDB, 0x64, 0xED, 0x76, 0xFF, 0x89, 0x00, 0x9B, 0x12,
0xAD, 0x24, 0xBF, 0x36, 0xC1, 0x48, 0xD3, 0x5A, 0xE5, 0x6C, 0xF7,
0x7E, 0x0A, 0x83, 0x18, 0x91, 0x2E, 0xA7, 0x3C, 0xB5, 0x42, 0xCB,
0x50, 0xD9, 0x66, 0xEF, 0x74, 0xFD, 0x8B, 0x02, 0x99, 0x10, 0xAF,
0x26, 0xBD, 0x34, 0xC3, 0x4A, 0xD1, 0x58, 0xE7, 0x6E, 0xF5, 0x7C,
0x0C, 0x85, 0x1E, 0x97, 0x28, 0xA1, 0x3A, 0xB3, 0x44, 0xCD, 0x56,
0xDF, 0x60, 0xE9, 0x72, 0xFB, 0x8D, 0x04, 0x9F, 0x16, 0xA9, 0x20,
0xBB, 0x32, 0xC5, 0x4C, 0xD7, 0x5E, 0xE1, 0x68, 0xF3, 0x7A, 0x0E,
0x87, 0x1C, 0x95, 0x2A, 0xA3, 0x38, 0xB1, 0x46, 0xCF, 0x54, 0xDD,
0x62, 0xEB, 0x70, 0xF9, 0x8F, 0x06, 0x9D, 0x14, 0xAB, 0x22, 0xB9,
0x30, 0xC7, 0x4E, 0xD5, 0x5C, 0xE3, 0x6A, 0xF1, 0x78 };
}
Java CRC16代码
C代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text; namespace GovConsoleSuperior.Common
{
/// <summary>
/// 循环冗余检验：CRC-16-CCITT查表法
/// </summary>
public static partial class CRCITU
{
/// <summary>
/// 计算给定长度数据的16位CRC
/// </summary>
/// <param name="data">要计算CRC的字节数组</param>
/// <returns>CRC值</returns>
public static byte[] GetCrc16(Byte[] buffer)
{
int crc = 0;
int l = buffer.Length;
for (int i = 0; i < l; i++)
{
int by = (crc >> 8) & 0xff;
crc = (crc & 0xffff) << 8;
crc = (crc ^ table[(buffer[i] ^ by) & 0xff]) & 0xffff;
} return GetCRCBytes(crc); }
/// <summary>
/// 获取CRC字节数组
/// </summary>
/// <param name="crc">整形的CRC</param>
/// <returns>两字节的CRC字节数组</returns>
private static byte[] GetCRCBytes(int crc)
{
byte[] result = BitConverter.GetBytes(crc);
Array.Resize(ref result, 2); //只截取前面两个byte字节 return result;
} static int[] table = {
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>
/// 检查给定长度数据的16位CRC是否正确
/// </summary>
/// <param name="FromHeadToVaild">要校验的字节数组</param>
/// <returns>
/// true：正确
/// false：错误
/// </returns>
/// <reamrks>
/// 字节数组最后2个字节为校验码
/// </reamrks>
public static Boolean IsCrc16Good(Byte[] FromHeadToCRC)
{
byte[] FromHeadToVaild = GetHeadToVaildData(FromHeadToCRC); //头到验证域
byte[] CRCFromPackage = GetCRCFromPackage(FromHeadToCRC); //获取客户端传来的包中的CRC数组
byte[] TrueCRCValue = GetCrc16(FromHeadToVaild); //获取客户端传来的包应该的CRC数组
return BytesEquals(CRCFromPackage, TrueCRCValue);
}
/// <summary>
/// 比较两个字节数组是否相等
/// </summary>
/// <param name="b1">byte数组1</param>
/// <param name="b2">byte数组2</param>
/// <returns>是否相等</returns>
private static bool BytesEquals(byte[] b1, byte[] b2)
{
if (b1.Length != b2.Length) return false;
if (b1 == null || b2 == null) return false;
for (int i = 0; i < b1.Length; i++)
if (b1[i] != b2[i])
return false;
return true;
} /// <summary>
/// 获取客户端传来的包中的CRC数组
/// </summary>
/// <param name="FromHeadToCRC">从头到CRC校验域</param>
/// <returns>CRC数组</returns>
private static byte[] GetCRCFromPackage(byte[] FromHeadToCRC)
{
int iCRCLen = 2; //因为CRC占两个字节
byte[] CRCValue = new byte[iCRCLen]; //用于存储包中CRC的值
int i;
for (i = 0; i < iCRCLen; i++) //得到一个临时字节数组
{
CRCValue[i] = FromHeadToCRC[FromHeadToCRC.Length - iCRCLen + i];
}
return CRCValue;
}
/// <summary>
/// 得到从头到有效数据的数据（不包含CRC验证域）
/// </summary>
/// <param name="FromHeadToCRC"></param>
/// <returns></returns>
private static byte[] GetHeadToVaildData(byte[] FromHeadToCRC)
{
int iLengh = FromHeadToCRC.Length - 2; //因为CRC占两个字节
byte[] FromHeadToVaild = new byte[iLengh]; //用于存储包头到有效数据域的bytes
int i;
for (i = 0; i < iLengh; i++) //得到一个临时字节数组
{
FromHeadToVaild[i] = FromHeadToCRC[i];
}
return FromHeadToVaild; } } }
C语言 CRC16代码
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