Método de tabla de búsqueda CRC16 para verificar la programación

Verificación CRC
La verificación de redundancia cíclica es una función de detección de errores de transmisión de datos, que realiza un cálculo polinómico de los datos y agrega el resultado de la verificación a la trama para generar una nueva trama y enviarla al dispositivo de comunicación.
Polinomio CRC16: x16 + x15 + x2 + 1
Lista de verificación CRC16: CRC-CCITT

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Collections;
namespace Crc_Eg
{
    
    
    class Program
    {
    
    
     public static UInt16 CRC16_INIT_VAL = 0x0000;
     //CRC16静态表
     public static UInt16[] Crc16Table = new UInt16[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>
        /// 计算Crc16 查表法
        /// </summary>
        /// <param name="buffer"></param>
        /// <returns></returns>
        public static UInt16 Crc16(byte[] buffer)
        {
    
    
            UInt16 ulCrc = CRC16_INIT_VAL;
            int i=0;
            while(i<buffer.Length)
            {
    
    
                ulCrc=(UInt16)((ulCrc<<8)^Crc16Table[((ulCrc>>8)^buffer[i++])&0xff]);
            }
            return ulCrc;
        }
        /// <summary>
        /// 十六进制转换为字节
        /// </summary>
        /// <param name="s"></param>
        /// <returns></returns>
        public static byte[] HexStringToByteArray(string s)
        {
    
    
            string  str=s.Replace(" ","");
            byte[] buffer = new byte[str.Length / 2];
            for (int i = 0; i < str.Length; i += 2)
            {
    
    
                buffer[i / 2] = (byte)Convert.ToByte(str.Substring(i,2),16);
            }
            return buffer;

        }
        static void Main(string[] args)
        {
    
    
            //7E 00 01 00 04 30 70 01 01 E6 96 7F
            byte[] buffer = HexStringToByteArray("00 01 00 04 30 70 01 01");
            UInt16 crc = Crc16(buffer);
            //高字节两位
            string CrcHigh = string.Format("{0:X}",crc/256).PadLeft(2,'0');
            //低字节两位
            string CrcLow = string.Format("{0:X}", crc % 256).PadLeft(2, '0');
            Console.WriteLine(CrcHigh+" "+CrcLow);
            Console.ReadLine();
        }
    }
}