CODEWITHSUNDEEP
c#
Pradeep Singh
Pradeep Singh

Reputation: 23

writing to rfid

    public void writeToCard2(string sourceText, string cardType)
    {
        Cursor.Current = Cursors.WaitCursor;

        int itemLength = sourceText.Split(',').Length;
        sourceText = itemLength.ToString() + "," + sourceText + ",";
        byte[] dataByteArray = Encoding.GetEncoding(932).GetBytes(sourceText);
        //textBox2.Text = BitConverter.ToString(dataByteArray);

        int dataByteLength = dataByteArray.Length;
        int writeLength = dataByteLength + 11;
        byte[] writeByteArray = new byte[writeLength];

        writeByteArray[0] = 0x02;//STX
        writeByteArray[1] = 0x00;//アドレス
        writeByteArray[2] = 0x78;//コマンド
        writeByteArray[3] = Convert.ToByte(dataByteLength + 4);//データ長
        writeByteArray[4] = 0xa1;//詳細コマンド
        writeByteArray[5] = 0x00;//書き込み開始ブロック番号
        writeByteArray[6] = Convert.ToByte(dataByteLength);//書き込みバイト数
        for (int i = 0; i < dataByteLength; i++)
        {
            writeByteArray[i + 7] = dataByteArray[i];//書き込みデータ
        }
        writeByteArray[dataByteLength + 7] = 0x40;//オプションフラグ
        writeByteArray[dataByteLength + 8] = 0x03;//ETX
        byte sum = 0x00;
        for (int i = 0; i <= dataByteLength + 8; i++)
        {
            sum += writeByteArray[i];
        }
        writeByteArray[dataByteLength + 9] = sum;//SUM値
        writeByteArray[dataByteLength + 10] = 0x0d;//CR

        //string tempStr = BitConverter.ToString(writeByteArray);

        //port.Write(writeByteArray, 0, writeByteArray.Length);
        serialPort1.Write(writeByteArray, 0, writeByteArray.Length);

        writeCardType = cardType;

        Cursor.Current = Cursors.Default;
    }

the above method writes data on an rfid tag in the line 

serialPort1.Write(writeByteArray, 0, writeByteArray.Length);

writeByteArray is the size of the data which is exceeding the limit of the RFID tag, my boss said convert it to ascii code and then write to RFID.

Will this help can this conversion reduce size of data?

Is there any other way round withoud using a different RFID tag?

Upvotes: 1

Views: 2785

Answers (1)

Tigran
Tigran

Reputation: 62246

Your boss said to convert to ASCII cause device reads information byt per byte. I worked with that devices and that is usual way they read the data stream passed to them.

There is not any allocation benefit in this, cause the size of the data remains the same, what changes is information rapresentation. That is.

Upvotes: 1

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