public void ReaderThread()
{
for (; ;)
{
// Get the first unread reply off of the queue, send that to the SpectraCyber object for processing
cCommandItem oCommandItem = mReplyQueue.GetFirstItem();
moSSP4.ProcessReply(oCommandItem.Reply, oCommandItem.CommandType);
// The program is closing, gracefully stop this thread
if (oCommandItem.CommandType == eCommandType.Termination)
{
break;
}
}
// The thread is done running, empty out the command queue
mCommandQueue.Clear();
}
// #### Thread functions #### //
public void CommunicationThread()
{
string strCommand;
// Init the serial port, set the timeout value, open the port.
mrSerialPort = new System.IO.Ports.SerialPort(mstrCommPort, miBaudRate, mparParity, miDataBits, mstpBits);
mrSerialPort.ReadTimeout = miTimeout;
if (!(mrSerialPort.IsOpen))
{
try
{
mrSerialPort.Open();
}
catch (Exception e)
{
System.Windows.Forms.MessageBox.Show(e.Message);
}
for (; ;)
{
// Get the first unread item off of the queue (which blocks this thread if no item exists)
cCommandItem oCommandItem = mCommandQueue.GetFirstItem();
// TODO: Figure out how to repeat commands.
if (oCommandItem.CommandType == eCommandType.Repeat)
{
mCommandQueue.Add(oCommandItem.Duplicate());
}
strCommand = oCommandItem.Command;
// Break out of the loop if a eCommandType.Termination command is sent
if (oCommandItem.CommandType == eCommandType.Termination || !(mrSerialPort.IsOpen))
{
// Copy the command into the reply for this queue item.
oCommandItem.Reply = strCommand;
mReplyQueue.Add(oCommandItem);
break;
}
else if (oCommandItem.CommandType == eCommandType.ScanStop)
{
// The command to stop is also the reply, copy that over.
oCommandItem.Reply = strCommand;
// Essentially clear off the command queue by selecting only the repeating commands
List <cCommandItem> lstCommands = mCommandQueue.FindAll(CommandRepeats);
mCommandQueue.Clear();
for (int i = 0; i < lstCommands.Count; i++)
{
mCommandQueue.Add(lstCommands[i]);
}
}
if (!(oCommandItem.CommandType == eCommandType.ScanStart || oCommandItem.CommandType == eCommandType.ScanEnd)) // || oCommandItem.CommandType == eCommandType.ScanStop))
{
mrSerialPort.DiscardInBuffer();
mrSerialPort.WriteLine(strCommand + "\r\n");
}
// DEBUGGING: Set the command window text:
//moSSP4.SetCommandWindowText(strCommand); // Output The Command sent to the SSP-4
//moSSP4.SetCommandWindowText("Waiting for " + oCommandItem.CommandWaitTime); // Output The Waiting Time before data is read from the SSP-4
// Give the Device some time to process the command.
System.Threading.Thread.Sleep(oCommandItem.CommandWaitTime);
// Handle the replies:
if (oCommandItem.CommandType == eCommandType.DataDiscard)
{
mrSerialPort.DiscardInBuffer();
}
else if (oCommandItem.ExpectReply)
{
string strReply = "";
byte tmpByte; // Used in Mono-compatable reading method
//char[] carrInBuffer = new char[miCharInputBufferSize]; // Used in Windows-only reading method
try
{
// Mono-compatable method for reading data from the serial port.
// Read from the serial port using bytes.
tmpByte = (byte)mrSerialPort.ReadByte();
while (tmpByte != 0x0A) // Read until a newline character found.
{
strReply += ((char)tmpByte);
tmpByte = (byte)mrSerialPort.ReadByte();
}
// Windows-only method for reading data.
// Read characters from the input buffer
//mrSerialPort.Read(carrInBuffer, 0, oCommandItem.NumCharactersToRead);
//foreach (char cCharacter in carrInBuffer)
// strReply += cCharacter;
// Clear the buffer:
mrSerialPort.DiscardInBuffer();
}
catch (TimeoutException e) // Probably caused by the box being off or the wrong COMM port being selected
{
oCommandItem.CommandType = eCommandType.Error;
strReply = "COMM_TIMEOUT_ERROR";
}
catch (Exception e)
{
System.Windows.Forms.MessageBox.Show("Unknown Error");
strReply = "UNKNOWN_EXCEPTION";
oCommandItem.CommandType = eCommandType.Error;
}
// Set the reply
oCommandItem.Reply = strReply;
}
else // Remove the first character from the command string and use that as the reply.
{
oCommandItem.Reply = strCommand.Remove(0, 1);
}
// Now, move the command to the other queue
mReplyQueue.Add(oCommandItem);
// Finally, sleep until the next command should be processed
System.Threading.Thread.Sleep(oCommandItem.TimeToNextCommand);
}
}
// The thread is done running. Close the connection to the serial port
mrSerialPort.Close();
}
