VDA5520 VIN Komprimierung/Encoding + EPC Memory Generator nach ISO/IEC 18000-6 (Type C)

nxexoxn

Beschreibung:

Encode/Decode VIN (Vehicle Identification Number) nach VDA5520.

.NET DLL-Bibliothek zum Komprimieren einer 17-stelligen VIN (Vehicle Identification Number) in eine 13-Byte Hex-formatierte VIN samt Protocol Control Bit.
Dieser Hex-formatierte Wert kann in den EPC-Memory eines UHF- Transponders über einen RFID-Reader geschrieben werden.

Beispiel encoding:
VIN.GenerateEpcMemoryData("ABCDEFGH123456789");
Ergebnis:
4D030A4F510D0420C41461C8C72CF4D76DF8E600

Beispiel decoding:
VIN.GetVinFromEpcMemoryData("4D030A4F510D0420C41461C8C72CF4D76DF8E600");
Ergebnis:
ABCDEFGH123456789

C#-Code:

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;



namespace VDA5520

{

    public static class VIN

    {

        public static string GenerateEpcMemoryData(string VIN)

        {

            //string ProtocolControl = "4903";  // Without optional user memory

            string ProtocolControl = "4D03";    // With optional user memory

            string DSFID = "0A";

            string PrecursorVin = "4F";

            string RelativeOid = "51";

            string LengthVin = "0D";

            string Encoded6BitVin = Encode6BitVin(VIN);



            return ProtocolControl + DSFID + PrecursorVin + RelativeOid + LengthVin + Encoded6BitVin;

        }



        public static string GetVinFromEpcMemoryData(string EpcMemoryData)

        {

            string CompressedSixBitVin = EpcMemoryData.Substring(12);



            return Decode6BitVin(CompressedSixBitVin);

        }



        private static string Encode6BitVin(string VIN)

        {

            try

            {

                if (VIN != string.Empty)

                {

                    StringBuilder SixBitVin = new StringBuilder();



                    // Binary 6 Bit

                    for (int i = 0; i < VIN.Length; i++)

                    {

                        string SixBit = Convert.ToString(VIN[i], 2).PadLeft(8, '0');

                        SixBit = SixBit.Substring(2, 6);

                        SixBitVin.Append(SixBit);

                    }



                    // Fill with "10" Padright (at the end)

                    SixBitVin.Append("10");



                    // Bin to hexstring output

                    return BinToHex(SixBitVin.ToString()) + "00";       // Add terminator for last byte

                }

                else

                    return string.Empty;

            }

            catch

            {

                return string.Empty;

            }

        }



        private static string Decode6BitVin(string CompressedSixBitVin)

        {

            try

            {

                string SixBitVin = HexToBin(CompressedSixBitVin);

                StringBuilder UncompressedVin = new StringBuilder();



                // Generate SixBitVinDataTable ASCII: 40 - 93

                Dictionary<string, string> SixBitVinDataTable = new Dictionary<string, string>();

                for (int i = 40; i <= 93; i++)

                {

                    string SixBitBin = HexToBin(i.ToString("X2")).Substring(2);

                    string Ascii = ((char)i).ToString();



                    SixBitVinDataTable.Add(SixBitBin, Ascii);

                }



                // Split SixBitVin into six blocks and lookup for character in SixBitVinDataTable

                for (int i = 0; i < SixBitVin.Length - 6; i += 6)

                {

                    string Value;

                    SixBitVinDataTable.TryGetValue(SixBitVin.Substring(i, 6), out Value);

                    UncompressedVin.Append(Value);

                }



                return UncompressedVin.ToString();

            }

            catch

            {

                return string.Empty;

            }

        }



        private static string BinToHex(string bin)

        {

            StringBuilder Out = new StringBuilder();



            for (int i = 0; i <= bin.Length - 4; i += 4)

                Out.Append(string.Format("{0:X}", Convert.ToByte(bin.Substring(i, 4), 2)));



            return Out.ToString();

        }



        private static string HexToBin(string hexvalue)

        {

            string tmp = "";

            string bin = "";

            int zerofill = 0;

            for (int i = 0; i < hexvalue.Length; i++)

            {

                tmp = Convert.ToString(Convert.ToInt32(hexvalue.Substring(i, 1), 16), 2);

                zerofill = 4 - tmp.Length;

                for (int j = 0; j < zerofill; j++)

                    bin += "0";

                bin += tmp;

            }

            return bin;

        }

    }

}

Awendung:

C#-Code:

VIN.GenerateEpcMemoryData("ABCDEFGH123456789");



VIN.GetVinFromEpcMemoryData("4D030A4F510D0420C41461C8C72CF4D76DF8E600");

Download:

http://nxexoxn.nx.ohost.de/site/vda5520.htm