Question

我无法可靠地获得PN532来响应固件信息命令以外的命令。我正在Windows上使用HSU，并使用从Adafruit及其开发板的v1.6获得的FTDI电缆。

黑色读数来自ReadFile呼叫超时，它设置为20，并且禁用了所有流控制内容。

我不认为这是电缆，因为唤醒和固件版本的内容是有效的，并且每次都可以工作。

串行端口开放代码：

// Open the COM port
HANDLE commHandle = CreateFile(
    "\\\\.\\COM5",
    GENERIC_READ | GENERIC_WRITE,
    0,
    null,
    OPEN_EXISTING,
    0,
    null
);

// Get the existing settings
DCB serialSettings;
GetCommState(
    commHandle,
    &serialSettings
);
// Page 26 of the User Manual specifies these settings
serialSettings.BaudRate = CBR_115200;
serialSettings.ByteSize = 8;
serialSettings.StopBits = ONESTOPBIT;
serialSettings.Parity = NOPARITY;

// These did not make it any better or worse
serialSettings.fParity = false;
serialSettings.fOutxCtsFlow = false;
serialSettings.fOutxDsrFlow = false;
serialSettings.fDtrControl = DTR_CONTROL_DISABLE;
serialSettings.fDsrSensitivity = false;
serialSettings.fTXContinueOnXoff = true;
serialSettings.fOutX = false;
serialSettings.fInX = false;
serialSettings.fErrorChar = false;
serialSettings.fNull = false;
serialSettings.fRtsControl = RTS_CONTROL_DISABLE;
serialSettings.fAbortOnError = false;

// Setup the state
SetCommState(
    commHandle,
    &serialSettings
);

// Clean out any buffers or flags
PurgeComm(
    commHandle,
    PURGE_RXCLEAR | PURGE_RXCLEAR | PURGE_TXABORT | PURGE_TXCLEAR
);

使用从输出参数获得的大小来写入HANDLE和从中读取数据。

Write:  55 55 00 00 00 00 00 00 00 00 FF 02 FE D4 02 2A 00
Read:  00 00 FF 00 FF 00 00 00 FF 06 FA D5 03 32 01 06 07 E8 00
Write:  00 00 FF 00 FF 00
Write:  00 00 FF 05 FB D4 14 01 14 01 02 00
Read: 
Write:  00 00 FF 05 FB D4 14 01 14 01 02 00
Read: 
Write:  00 00 FF 05 FB D4 14 01 14 01 02 00
Read: 
Write:  00 00 FF 05 FB D4 14 01 14 01 02 00
Read: 
Write:  00 00 FF 05 FB D4 14 01 14 01 02 00
Read: 
Write:  00 00 FF 05 FB D4 14 01 14 01 02 00
Read: 
Write:  00 00 FF 05 FB D4 14 01 14 01 02 00
Read: 
Write:  00 00 FF 05 FB D4 14 01 14 01 02 00
Read: 
Read:

编辑：这似乎仅在Windows上发生，我在Debian上尝试了相同的过程，并且运行良好。我为此使用Java，因此我只需要重写本机，这样通信本身就可以正常工作。这对我来说很奇怪。

Windows上的PN532 HSU中级读物

0 个答案: