/// <summary>
/// Initializes the communication port.
/// </summary>
/// Revision History
/// MM/DD/YY who Version Issue# Description
/// -------- --- ------- ------ ---------------------------------------
/// 08/01/05 bdm 7.13.00 N/A Created
private void Init()
{
// create a system event for synchronizing Closing
m_ptrCloseEvent = PortAPI.CreateEvent(true,
false,
m_strCloseEventName);
// create the transmit and receive buffers
m_abytRxBuf = new byte[m_uintRxBufSz];
m_abytTxBuf = new byte[m_uintTxBufSz];
//Default using detailed port settings;
m_portSettings = new DetailedPortSettings();
}
/// <summary>
/// Opens the port passed in as a parameter.
/// </summary>
/// <param name="portName">
/// The communication port to open.
/// </param>
/// <exception cref="CommPortException">
/// Thrown when a port failure occurs.
/// </exception>
/// <example>
/// <code>
/// Communication comm = new Communication();
/// comm.OpenPort("COM4:");
/// </code>
/// </example>
/// Revision History
/// MM/DD/YY who Version Issue# Description
/// -------- --- ------- ------ ---------------------------------------
/// 08/01/05 bdm 7.13.00 N/A Created
public void OpenPort(string portName)
{
byte[] abytReadBuf = new Byte[m_uintRxBufSz];
int intBytesRead = 0;
string strDesc;
try
{
//Only support one port at a time.
if (IsOpen)
{
strDesc = string.Format(m_rmStrings.GetString("PORT_ALREADY_OPEN"));
throw (new Exception(strDesc));
}
m_strPortName = portName;
Init();
//This must be performed after the Init() and before the Open();
m_portSettings = new HandshakeNone();
Open();
//Allow the open port response to be received by the buffer and
//then ReadFile to remove any of the open port bytes received
System.Threading.Thread.Sleep(100);
PortAPI.ReadFile(m_hPort, abytReadBuf,
m_uintRxBufSz, ref intBytesRead);
m_abytRxBuf.Initialize();
m_uintRxBufIx = 0;
}
catch (Exception e)
{
strDesc = string.Format(m_rmStrings.GetString("OPEN_PORT_FAILED"),
e.Message);
throw (new CommPortException(strDesc, e));
}
}