/// <summary>
/// This method outputs new commands when necessary.
/// </summary>
/// <param name="junk"></param>
private bool runTick(uint elaspedTime_ms)
{
if (isDone)
{
return(false);
}
lock (commandBuffer)
{
long elaspedTime = DataStructures.Timing.Shared.MillisecondsToTicks(elaspedTime_ms);
if (currentCommand >= commandBuffer.Count)
{
if (this.Done != null)
{
this.Done(this, new NationalInstruments.DAQmx.TaskDoneEventArgs(null));
}
isDone = true;
return(false);
}
while (elaspedTime >= commandBuffer[currentCommand].commandTime)
{
device.Write(commandBuffer[currentCommand].command);
device.Flush(BufferTypes.OutBuffer, false);
AtticusServer.server.messageLog(this, new MessageEvent("Output rs232 command: " + commandBuffer[currentCommand].command, 1, MessageEvent.MessageTypes.Log, MessageEvent.MessageCategories.Serial));
currentCommand++;
if (currentCommand >= commandBuffer.Count)
{
break;
}
}
}
// }
// catch (Exception e)
// {
// AtticusServer.server.messageLog(this, new MessageEvent("Caught exception in RS232 task: " + e.Message + e.StackTrace));
// AtticusServer.server.messageLog(this, new MessageEvent("Stopping rs232 task."));
// if (this.Done != null)
// {
// this.Done(this, new NationalInstruments.DAQmx.TaskDoneEventArgs(e));
// isDone = true;
// }
// }
return(true);
}
private void Start_Click(object sender, System.EventArgs e)
{
//Read in the selected values from the panel and configure the serial port accordingly.
myAlias = VISAResource.SelectedItem.ToString();
baudRate = int.Parse(BaudRate.Text);
dataBits = short.Parse(DataBits.Text);
parity = Parity.Text;
stopBits = StopBits2.Text;
readDelay = int.Parse(Delay.Text);
flowControlText = FlowControl.Text;
writeBuffer = WriteBuffer.Text;
try
{
//Open a new VISA session by creating an instance of a SerialSession
//object.
mySession = new NationalInstruments.VisaNS.SerialSession(myAlias);
//Configure the VISA session.
mySession.BaudRate = baudRate;
mySession.DataBits = dataBits;
//Set the flow control.
switch (flowControlText)
{
case "XON/XOFF":
mySession.FlowControl = FlowControlTypes.XOnXOff;
break;
case "None":
flowControl = FlowControlTypes.None;
break;
case "RTS/CTS":
flowControl = FlowControlTypes.RtsCts;
break;
case "DTR/DSR":
flowControl = FlowControlTypes.DtrDsr;
break;
}
mySession.FlowControl = flowControl;
//Set the parity.
switch (parity)
{
case "None":
mySession.Parity = NationalInstruments.VisaNS.Parity.None;
break;
case "Even":
mySession.Parity = NationalInstruments.VisaNS.Parity.Even;
break;
case "Odd":
mySession.Parity = NationalInstruments.VisaNS.Parity.Odd;
break;
case "Mark":
mySession.Parity = NationalInstruments.VisaNS.Parity.Mark;
break;
case "Space":
mySession.Parity = NationalInstruments.VisaNS.Parity.Space;
break;
}
//Set the stop bits.
switch (stopBits)
{
case "1.0":
mySession.StopBits = NationalInstruments.VisaNS.StopBitType.One;
break;
case "1.5":
mySession.StopBits = NationalInstruments.VisaNS.StopBitType.OneAndOneHalf;
break;
case "2.0":
mySession.StopBits = NationalInstruments.VisaNS.StopBitType.Two;
break;
}
//Check if the Write button is set to on or off.
if (axCWButton1.Value)
{
mySession.Write(writeBuffer); //Write the data to the buffer
}
//Delay between writing and reading.
Thread.Sleep(readDelay);
//Check if the Read button is set to on or off.
if (axCWButton2.Value)
{
//Read all available data from the buffer and display it onscreen.
readBuffer = mySession.ReadString(mySession.AvailableNumber);
ReadBuffer.Text = readBuffer;
bytesRead = readBuffer.Length;
BytesRead.Text = bytesRead.ToString();
}
}
catch (VisaException ex)
{
MessageBox.Show(ex.Message);
}
finally
{
//Dispose of the SerialSession instance to close the VISA session.
mySession.Dispose();
}
}
