public class CRC16Helper
{
/// <summary>
/// CRC校验，参数data为byte数组
/// </summary>
/// <param name="data">校验数据，字节数组</param>
/// <returns>字节0是高8位，字节1是低8位</returns>
public static byte[] CRC16(byte[] data)
{
//crc计算赋初始值
int crc = 0xffff;
for (int i = 0; i < data.Length; i++)
{
crc = crc ^ data[i];
for (int j = 0; j < 8; j++)
{
int temp;
temp = crc & 1;
crc = crc >> 1;
crc = crc & 0x7fff;
if (temp == 1)
{
crc = crc ^ 0xa001;
}
crc = crc & 0xffff;
}
}
//CRC寄存器的高低位进行互换
byte[] crc16 = new byte[2];
//CRC寄存器的高8位变成低8位，
crc16[1] = (byte)((crc >> 8) & 0xff);
//CRC寄存器的低8位变成高8位
crc16[0] = (byte)(crc & 0xff);
return crc16;
}
/// <summary>
/// CRC校验，参数为空格或逗号间隔的字符串
/// </summary>
/// <param name="data">校验数据，逗号或空格间隔的16进制字符串(带有0x或0X也可以),逗号与空格不能混用</param>
/// <returns>字节0是高8位，字节1是低8位</returns>
public static byte[] CRC16(string data)
{
//分隔符是空格还是逗号进行分类，并去除输入字符串中的多余空格
IEnumerable<string> datac = data.Contains(",") ? data.Replace(" ", "").Replace("0x", "").Replace("0X", "").Trim().Split(',') : data.Replace("0x", "").Replace("0X", "").Split(' ').ToList().Where(u => u != "");
List<byte> bytedata = new List<byte>();
foreach (string str in datac)
{
bytedata.Add(byte.Parse(str, System.Globalization.NumberStyles.AllowHexSpecifier));
}
byte[] crcbuf = bytedata.ToArray();
//crc计算赋初始值
int crc = 0xffff;
for (int i = 0; i < crcbuf.Length; i++)
{
crc = crc ^ crcbuf[i];
for (int j = 0; j < 8; j++)
{
int temp;
temp = crc & 1;
crc = crc >> 1;
crc = crc & 0x7fff;
if (temp == 1)
{
crc = crc ^ 0xa001;
}
crc = crc & 0xffff;
}
}
//CRC寄存器的高低位进行互换
byte[] crc16 = new byte[2];
//CRC寄存器的高8位变成低8位
crc16[1] = (byte)((crc >> 8) & 0xff);
//CRC寄存器的低8位变成高8位
crc16[0] = (byte)(crc & 0xff);
return crc16;
}
}方法调用
//例如 我们计算 0x01, 0x06, 0x11, 0x98, 0x00, 0x00 的CRC16
byte[] c1 = CRC16Helper.CRC16(new byte[] { 0x01, 0x06, 0x11, 0x98, 0x00, 0x00 }); //计算结果为 0x0D, 0x19
或者
byte[] c2 = CRC16Helper.CRC16("01 06 11 98 00 00"); //计算结果为 0x0D, 0x19