c# ModBus Rtu 算出CRC校验码

public static byte[] ToModbus(byte[] byteData)
    {
        byte[] CRC = new byte[2];

        UInt16 wCrc = 0xFFFF;
        for (int i = 0; i < byteData.Length; i++)
        {
            wCrc ^= Convert.ToUInt16(byteData[i]);
            for (int j = 0; j < 8; j++)
            {
                if ((wCrc & 0x0001) == 1)
                {
                    wCrc >>= 1;
                    wCrc ^= 0xA001;//异或多项式
                }
                else
                {
                    wCrc >>= 1;
                }
            }
        }

        CRC[1] = (byte)((wCrc & 0xFF00) >> 8);//高位在后
        CRC[0] = (byte)(wCrc & 0x00FF);       //低位在前
        return CRC;

    }

测试.

byte[] k = new byte[] { 0x01, 0x03, 0x00, 0x01, 0x00, 0x02 };
byte[] t = ToModbus(k);
string str = "";
for (int i = 0; i < t.Length; i++)
 {
       str+=t[i].ToString("X");//10->16
  }
  //-->95CB