public RS232Task(NationalInstruments.VisaNS.SerialSession device)
{
this.device = device;
}
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();
}
}
public RS232Task(NationalInstruments.VisaNS.SerialSession device)
{
this.device = device;
}
