RF_TRIO_PLL_ZIG/Basic_Terminal/Func/Crc16.cs

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

namespace RF_TRIO_PLL_ZIG
{
    

    class Crc16
    {
        private readonly ushort[] Table_CRC16 = {
            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
        };
        const int POLYNOMIAL = 0x131; // P(x) = x^8 + x^5 + x^4 + 1 = 100110001
        public enum EtError
        {
            CHECKSUM_ERROR = 0,
            NO_ERROR
        }
        //-----------------------------------------------
        //UART CRC üũ �Լ�
        //-----------------------------------------------
        public ushort CRC16_Generate(byte[] buf_ptr, int len)
        {
            byte dt = 0;
            ushort crc16 = 0;
            ushort index = 4;
            len *= 8;
            for (crc16 = (ushort)0x0000; len >= 8; len -= 8)
            {
                crc16 = (ushort)(Table_CRC16[(crc16 >> 8) ^ (ushort)(buf_ptr[index++])] ^ (crc16 << 8));
            }

            if (len != 0)
            {
                dt = (byte)( buf_ptr[index] << 8);

                while (len != 0)
                {
                    len--;

                    if (((crc16 ^ dt) & ((ushort)1 << 15)) != 0)
                    {
                        crc16 = (ushort)(crc16 << 1);
                        crc16 = (ushort)(crc16 ^ 0x1021);
                    }
                    else
                    {
                        crc16 = (ushort)(crc16 << 1);
                    }
                    dt = (byte)(dt << 1);
                }
            }
            return (crc16);
        }

        public EtError CRC16_Check(byte[] buf_ptr, int len, ushort checksum)
        {
            byte dt = 0;
            ushort crc16 = 0;
            ushort index = 4;

            len *= 8;
            for (crc16 = (ushort)0x0000; len >= 8; len -= 8, index++)
            {
                crc16 = (ushort)(Table_CRC16[(crc16 >> 8) ^ (ushort)(buf_ptr[index])] ^ (crc16 << 8));
            }

            if (len != 0)
            {
                dt = (byte)(buf_ptr[index] << 8);

                while (len != 0)
                {
                    len--;

                    if (((crc16 ^ dt) & ((ushort)1 << 15)) != 0)
                    {
                        crc16 = (ushort)(crc16 << 1);
                        crc16 = (ushort)(crc16 ^ 0x1021);
                    }
                    else
                    {
                        crc16 = (ushort)(crc16 << 1);
                    }
                    dt = (byte)(dt << 1);
                }
            }
            return (crc16 == checksum ? EtError.CHECKSUM_ERROR : EtError.NO_ERROR);
        }
        public byte STH30_CheckCrc(byte[] data, byte nbrOfBytes, byte checksum)
        {
            byte bit;        // bit mask
            int crc = 0xFF; // calculated checksum
            byte byteCtr;    // byte counter
            byte index = 1;

            // calculates 8-Bit checksum with given polynomial
            for (byteCtr = 0; byteCtr < nbrOfBytes; byteCtr++)
            {
                crc ^= (data[index++]);
                for (bit = 8; bit > 0; --bit)
                {
                    if (Convert.ToBoolean(crc & 0x80)) { crc = (crc << 1) ^ POLYNOMIAL; }
                    else crc = (crc << 1);
                }
            }
            if (crc != checksum) return 0;
            else return 1;
        }
        public byte STH30_CreateCrc(byte[] data, byte nbrOfBytes)
        {
            byte bit;        // bit mask
            int crc = 0xFF; // calculated checksum
            byte byteCtr;    // byte counter
            byte index = 1;
            // calculates 8-Bit checksum with given polynomial
            for (byteCtr = 0; byteCtr < nbrOfBytes; byteCtr++)
            {
                crc ^= (data[index++]);
                for (bit = 8; bit > 0; --bit)
                {
                    if (Convert.ToBoolean(crc & 0x80)) { crc = (crc << 1) ^ POLYNOMIAL; }
                    else crc = (crc << 1);
                }
            }
            return (byte)crc;
        }
    }
}