/// <summary>
/// Public constructor for the Receiver class.
/// </summary>
/// <param name="serialPort">The serial port object to which the receiver is connected</param>
/// <param name="portName">The name of the port (i.e. COM1, COM2, etc.)</param>
/// <param name="dispatcher">The event queue dispatcher where events generated by this class are sent</param>
/// <remarks>
/// After opening the port, the constructor calls the init() method which determines whether the hardware connect
/// is, in fact, a VEMCO reciever and then proceeds to configure it. After returning, the constructor then instructs
/// the receiver to start sending "Real Time" data. Finally the run() method is called and the objects stays in
/// the run method until it shutdown() is called. With the exception of whether the class in run()ing or not, no state
/// is maintained by the class.
/// </remarks>
public Receiver(string serialNumber, string model, Dispatcher dispatcher)
{
VEMCO_SerialNumber = serialNumber;
VEMCO_Model = model;
Dictionary<int, string> configFiles = new Dictionary<int, string>();
this.TTL = DEFAULT_TTL;
this.serialPort = serialPort;
this.portName = portName;
this.dispatcher = dispatcher;
//serialPort.Open();
encoder = null;
//init();
if (encoder != null)
{
//this.textReader = new StreamReader(serialPort.BaseStream, serialPort.Encoding);
//Object[] r = {"0"};
//write("RTMPROFILE", r);
//write("START");
//Thread.Sleep(500);
//while (serialPort.BytesToRead > 0)
//{
// dispatcher.enqueueEvent(new NoteReceiver("Read: " + serialPort.ReadExisting(),
// this, this.portName, this.VEMCO_SerialNumber, this.VEMCO_Model, this.encoder.encoderConfig));
//}
//run();
dispatcher.enqueueEvent(new NewReceiver(this, this.portName, this.VEMCO_SerialNumber, this.VEMCO_Model, this.encoder.encoderConfig));
}
else
{
ReceiverExceptions re = new ReceiverExceptions(this, "(FATAL) Failed to configure encoder during init().", true);
//dispatcher.enqueueEvent(new ExcepReceiver(re,re.fatal,
// this, "test port name", this.VEMCO_SerialNumber, this.VEMCO_Model, this.encoder.encoderConfig));
//serialPort.Close();
//throw re;
}
}
/// <summary>
/// Objects of this class spend most of their execution time in this method. It simply waits asynchronously (control
/// is returned to the constructor and then returned here on an interrupt) for data. When data is read it is packaged
/// and sent to the event dispatcher.
/// </summary>
/// <returns></returns>
/// <exception cref="ReceiverExceptions">Thrown when the EOF is reached on the read stream (contains an
/// EndOfStreamException</exception>
public async Task run()
{
while (goState > 0)
{
var ret = string.Empty;
var buffer = new char[1]; // Not the most efficient...
while (!ret.Contains("\n") && (!ret.Contains("\r")))
{
var charsRead = await textReader.ReadAsync(buffer, 0, 1);
if (charsRead == 0)
{
EndOfStreamException eose = new EndOfStreamException();
ReceiverExceptions re = new ReceiverExceptions(this,"End of stream reached on serial port.",true,eose);
dispatcher.enqueueEvent(new ExcepReceiver(re, re.fatal,
this, this.portName, this.VEMCO_SerialNumber, this.VEMCO_Model, this.encoder.encoderConfig));
throw re;
}
ret += buffer[0];
}
if (ret.Length > 1)
{
dispatcher.enqueueEvent(new UnparsedMessage(ret,
this, this.portName, this.VEMCO_SerialNumber, this.VEMCO_Model, this.encoder.encoderConfig));
}
}
goState = -1;
}
