FastTransferModeCommand字节大小读取为什么会这样？

我正在编写一个自定义应用程序，将传感器信息的字节从我自己的自定义板传输到我基于ST25SDK（特别是V1.2.0）的应用程序。我的应用程序无法通过RF通道读取邮箱（是的，已启用），未通过“ST25SDK：传输完成并显示错误消息”。
当我下载ST25AndroidApp并从源代码编译时，我在尝试从标签读取数据传输时也遇到了同样的错误消息。在查看我的调试输出时，它似乎试图读取比我在嵌入式应用程序中写入少1个字节。
更多细节：所以我的应用程序将18个字节的数据写入快速邮箱。当我调试Read from Tag命令时，以下行显示为读取嵌入式（I2C）应用程序写入的18个字节。
INT
长度= mST25DVTag
.readMailboxMessageLength（）;

但是，进一步关闭该功能，当我进一步进入函数并进入mST25DVTag.readMialboxMessage时......
tmpBuffer =
mST25DVTag
.readMailboxMessage（（字节
）偏移，
尺寸）;

我最终从库中遇到了以下行（FastTransferModeCommand.class）;
归还这个
.mIso15693CustomCommand.readMsg（（字节
）mbAddress，这个
.computeMsgLengthParam（大小），
国旗，这个
.mUid）;

this.computeMsgLengthParam（size）取消我的18字节消息框长度，减去1并从消息框中只读取17个字节。
题：
有人能帮助我理解为什么会这样吗？
这可能是我的'传输完成错误'消息的来源吗？

＃st25dv04k #NFC＃st25sdk



以下为原文




I am writing a custom application that transfers bytes of sensor information from my own custom board to an app I am basing off of the ST25SDK (specifically V1.2.0). My application was failing to read the mailbox (yes, it's enabled) through the RF channel, failing with an 'ST25SDK: transfer finished with error message'.
When I download the ST25AndroidApp and compile from source, I also ran into this same error message when attempting to read a Data transfer from the tag. In looking at my debug output, it appears to be trying to read 1 less byte than I write in my embedded application.
More details: So my application writes 18 bytes of data into the Fast Mailbox. When I debug the Read from Tag command, the following line appears to read my 18 bytes written by the embedded (I2C) app.

int
length = mST25DVTag
.readMailboxMessageLength();

However, further down that function, when I step further into the function and enter into mST25DVTag.readMialboxMessage ...
tmpBuffer =
mST25DVTag
.readMailboxMessage((byte
) offset,
size);

I eventually run into the following line from within the library (FastTransferModeCommand.class);

return this
.mIso15693CustomCommand.readMsg((byte
)mbAddress, this
.computeMsgLengthParam(size),
flag, this
.mUid);

this.computeMsgLengthParam(size) takes my 18 byte message box length, subtracts 1 and reads only 17 bytes from the message box.
Question:
Can someone help me understand why this is the case?
Could this be the source of my 'transfer finished with error'  message?

#st25dv04k #nfc #st25sdk