是否可以在UHF RFID标签中写入和读取ASCII字符？

Question

我正在开发摩托罗拉MC9190 RFID手持阅读器的应用程序.

我需要在UHF RFID标签中读取和写入人类可读的信息.所以我决定用ASCII字符写信息.

在进行一些研究时,我发现可以在RFID标签存储器中写入ASCII字符,但它支持较少的字符.直到它少于10个字符我才会介意.

引用:

https://support.tracerplus.com/index.php?/Knowledgebase/Article/View/199/15/encoding-rfid-tags-with-ascii-values-vs-hexadecimal-values-whats-the-difference

http://blog.atlasrfidstore.com/types-of-memory-in-gen-2-uhf-rfid-tags

现在,我有点困惑如何直接在阅读器中编写和读取ASCII字符.

这是用十六进制字符写的代码.

private void writeButton_Click(object sender, EventArgs e)
{
    string dataToWrite="ABCDEF9876";
    Symbol.RFID3.TagAccess.WriteAccessParams m_WriteParams;

    m_WriteParams.AccessPassword = 0;

    m_WriteParams.MemoryBank = MEMORY_BANK.MEMORY_BANK_USER;
    m_WriteParams.ByteOffset = 0;
    m_WriteParams.WriteDataLength = 6;

    byte[] writeData = new byte[m_WriteParams.WriteDataLength];
    for (int index = 0; index < m_WriteParams.WriteDataLength; index += 2)
    {
        writeData[index] = byte.Parse(dataToWrite.Substring(index * 2, 2),
            System.Globalization.NumberStyles.HexNumber);
        writeData[index + 1] = byte.Parse(dataToWrite.Substring((index + 1) * 2, 2),
            System.Globalization.NumberStyles.HexNumber);
    }

    m_WriteParams.WriteData = writeData;
    string m_SelectedTagID = "0123456789ABCDEF";        //for example
    RunWriteOperation(m_SelectedTagID,m_WriteParams);
}


 void RunWriteOperation(string m_SelectedTagID,Symbol.RFID3.TagAccess.WriteAccessParams m_WriteParams)
 {
    if (m_SelectedTagID != String.Empty)
    {
        m_ReaderAPI.Actions.TagAccess.WriteWait(m_SelectedTagID,m_WriteParams, null);
    }
 }

如果我想用ASCII编写,我猜它应该编码为ASCII字节.因此,如果我替换以下代码而不是for循环,它会成功写入吗？

string dataToWrite="HELLOWORLD";
byte[] writeData = ASCIIEncoding.ASCII.GetBytes(dataToWrite);

由于我没有读者,我现在无法测试.

如果它成功,在阅读标签时,如何配置阅读器解码为ASCII字符并显示它或我是否需要以编程方式进行转换？

由于我是RFID技术的新手,我不确定我是否正确地进行了研究.如果我错了,请纠正我.

Answer 1

void hex2dec(unsigned adchex,unsigned value) \n{\nunsigned value[4]; \n\nfor(i=0;i<4;i++)\n{\nvalue[i]=adchex%10;\n// value[i]=adchex%10+0x30; //for ASCII presentation\nadchex=adchex/10; \n}\n}\n

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您还可以在此处查看此 SDK：\n http://www.tsl.uk.com/2013/07/tsls-ios-uhf-ascii-2-0-sdk-v0-8-1-now -可用的/

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TSLAciiCommands.framework - 一组易于使用的 Objective C 类，封装了 TSL UHF ASCII 2.0 协议，作为通用静态框架提供，可与 iOS 设备和 iOS 模拟器一起使用\n- TSL ASCII 2.0 SDK 文档 \xe2 \x80\x93 可作为文档集以 HTML 格式集成到 Xcode 中\n- 快速启动示例 Xcode 项目

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如果您使用 TSLAciiCommands 框架，您可以执行类似的操作。

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-(void)initAndShowConnectedReader\n{\nif( _commander.isConnected )\n{\n    // Display the serial number of the successfully connected unit\n    [self.selectReaderButton setTitle:_currentAccessory.serialNumber  forState:UIControlStateNormal];\n\n    // Ensure the reader is in a known (default) state\n    // No information is returned by the reset command\n    TSLFactoryDefaultsCommand * resetCommand =  [TSLFactoryDefaultsCommand synchronousCommand];\n    [_commander executeCommand:resetCommand];\n\n    // Notify user device has been reset\n    if( resetCommand.isSuccessful )\n    {\n        self.resultsTextView.text = [self.resultsTextView.text  stringByAppendingString:@"Reader reset to Factory Defaults\\n"];\n    }\n    else\n    {\n        self.resultsTextView.text = [self.resultsTextView.text stringByAppendingString:@"!!! Unable to reset reader to Factory Defaults !!!\\n"];\n    }\n\n    // Update the version information for the connected reader\n    [_commander executeCommand:self.versionInformationCommand];\n\n    if( [self.class comparableVersionValue:self.versionInformationCommand.asciiProtocol] < [self.class comparableVersionValue:MINIMUM_ASCII_PROTOCOL_VERSION_FOR_LICENCE_KEY_COMMAND] )\n    {\n        [self updateResults:[NSString stringWithFormat:@"Reader does not support licence keys\\nRequires ASCII protocol: %@\\nReader ASCII protocol: %@\\n",\n                             MINIMUM_ASCII_PROTOCOL_VERSION_FOR_LICENCE_KEY_COMMAND,\n                             self.versionInformationCommand.asciiProtocol\n                             ]];\n    }\n    [self validateReader];\n}\nelse\n{\n    [self.selectReaderButton setTitle:@"Tap to select reader..." forState:UIControlStateNormal];\n    [self updateUIState];\n}\n}\n

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或者

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// Write data to general tag memory\nstring tagDataStr = "HELLO WORLD!";\nbyte[] tagData = ASCIIEncoding.ASCII.GetBytes(tagDataStr);\nbyte memBank = 0; // Different memory banks serve different purposes.      See MC9190 specifications.\nint addr = 0;\nbyte words = (byte)(tagData.Length / 2); // Words = length of msg / 2\n\nif (UHFWriteTagData(theHandle, readerType, memBank,addr, tagData,     (byte)tagData.Length, out errValue) == 0)\n{\n// Handle Error\n}\n\n// Read data from tag memory\nbyte[] readTagData = new byte[512];\nint bytesRead;\n\nif (UHFReadTagData(theHandle, readerType, memBank, addr, words,     readTagData,\nreadTagData.Length, out bytesRead, out errValue) == 0)\n{\n// Handle Error\n}\n\n\n// Display Results\nstring results =\n"Input tag ID: " +\ntagIDStr +\nEnvironment.NewLine +\n"Read tag ID: " +\nASCIIEncoding.ASCII.GetString(readTagID).Replace(\'\\0\',\'-\') +\nEnvironment.NewLine +\n"Input tag data: " +\ntagDataStr +\nEnvironment.NewLine +\n"Read tag data: " +\nASCIIEncoding.ASCII.GetString(readTagData).Replace(\'\\0\', \'-\').Substring(0,bytesRead) +\nEnvironment.NewLine;\n\nMessageBox.Show(results);\n

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