c# - 从 C++ 到 C# 重写串口通信

Question

我想知道我是否正确地将建立串行端口通信的 C++ 代码映射到 C#。

void some func(...)
{
 *hDev = CreateFile(PortNameUNC, GENERIC_READ|GENERIC_WRITE, 0, NULL, 
      OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);

    if(*hDev == INVALID_HANDLE_VALUE) return false ;

    DCB *dcb = new DCB ;
    memset(dcb, 0x00, sizeof(DCB)) ;
    dcb->DCBlength       = sizeof(DCB);
    dcb->BaudRate        = BaudRate;
    dcb->Parity          = Parity;
    dcb->StopBits        = StopBits;
    dcb->ByteSize        = ByteSize;
    dcb->fBinary         = TRUE;
    dcb->fDsrSensitivity = 0;
    dcb->fDtrControl     = (DTR ? DTR_CONTROL_ENABLE : DTR_CONTROL_DISABLE) ;
    dcb->fRtsControl     = (RTS ? RTS_CONTROL_ENABLE : RTS_CONTROL_DISABLE) ;
    dcb->fOutxCtsFlow    = (CTS ? 1 : 0) ;
    dcb->fOutxDsrFlow    = (DSR ? 1 : 0) ;
    dcb->fOutX           = (XonnXoff ? 1 : 0) ;
    dcb->fInX            = 0 ;      

    if(!SetCommState(*hDev, dcb)) 
    {
      delete dcb ;
      CloseHandle(*hDev) ;
      *hDev = INVALID_HANDLE_VALUE ;
      return false;
    }


    if(!SetTimeOut(readTimeOut, ReadIntervalTimeout) || !Reset())   
    {   
      CloseHandle(*hDev) ;
      *hDev = INVALID_HANDLE_VALUE ;
      return false;
    }
}

bool serial::SetTimeOut(DWORD readTimeOut, DWORD ReadIntervalTimeout)
{
  COMMTIMEOUTS *timeouts = new COMMTIMEOUTS ;
  memset(timeouts, 0, sizeof(COMMTIMEOUTS)) ;
  timeouts->ReadIntervalTimeout          = ReadIntervalTimeout ;
  timeouts->ReadTotalTimeoutMultiplier   = 5 ;
  timeouts->ReadTotalTimeoutConstant     = readTimeOut ; //...
  timeouts->WriteTotalTimeoutConstant    = 0 ; //
  timeouts->WriteTotalTimeoutMultiplier  = 2*BaudRate/8 ;
  const bool ret = SetCommTimeouts(*hDev, timeouts) != FALSE ;
  delete timeouts ;
  m_currentTimeOut = readTimeOut ;
  return ret ;
}

这是我的 C# 映射:

 public SerialPortHASP(string portName, int baudRate, Parity parity, int dataBits, StopBits stopBits, bool dtr, bool rts, bool xonxoff)
        {

            m_port = new SerialPort(portName, baudRate, parity, dataBits, stopBits);

            // Just store parameters user entered
            m_portName = portName;
            m_baudRate = baudRate;
            m_parity = parity;
            m_dataBits = dataBits;
            m_stopBits = stopBits;
            m_xonxoff = xonxoff;
            m_dtr = dtr;
            m_rts = rts;

            // Set XonXoff if set
            if (xonxoff)
                m_port.Handshake = Handshake.XOnXOff;

            // Set DTR/RTS
            m_port.DtrEnable = dtr;
            m_port.RtsEnable = rts;

            m_port.ReadTimeout = 500; // or some other values
            m_port.WriteTimeout = 500;

            // Open the port for communications
            m_port.Open();
        }

我需要执行一些其他的读写操作(根据协议(protocol))，直到我可以测试我的映射是否正确，所以这就是为什么我想仔细检查我是否采用了正确的方法将上述代码映射到 C#？或者我应该服用 this使用 PInvoke 调用路由？或者仍然尝试我目前的方法？谢谢

附言。事情是你可以通过这种方式看到我无法复制 C++ 调用允许制作的所有参数

Answer 1

我会添加到初始化:

m_port.DataReceived += _serial_DataReceived;

从端口获取数据的事件。需要异步工作。

和

void _serial_DataReceived(object sender, SerialDataReceivedEventArgs e)
 {
   int _len = _serial.BytesToRead;
   byte[] _out = new byte[_len];
   _serial.Read(_out, 0, _len);
 }