I am developing a Test station using VXI based systems.
I am using Agilent E1401B Mainframe, with NI VXI-MXI-2 card.
I have never done any rogramming with VXI systems before, so to start, I write a simple code to read " *IDN? " from the cards installed in the mainframe.
I am using C# 2010 to develop the whole system.
Heare is an example code I wrote to access the VXI cards installed and try to read IDN?.
But it gives an exception "The given session or object reference does not support this operation.."
using Ivi.Visa.Interop;
namespace VXI
{
class Program
{
static void Main(string[] args)
{
ResourceManager ioMgr = new ResourceManagerClass();
string[] resources = ioMgr.FindRsrc("?*");
FormattedIO488 instrument = new Ivi.Visa.Interop.FormattedIO488Class();
instrument.IO = (IMessage)ioMgr.Open("VXI0::1::INSTR", AccessMode.NO_LOCK, 1000, "");
string cmd = "*IDN?";
instrument.WriteString(cmd, true);
string responseString = instrument.ReadString();
try
{
instrument.IO.Close();
}
catch { }
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(instrument);
}
catch { }
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(ioMgr);
}
catch { }
}
}
}
Please someone help me to kickstart this VXI interface with Visual C#.
I am stucked here and dont know what to do next. searched all over the internet and couldnt find a good reference for C# in this problem.
could some plese help me with a sample code to read IDN of card installed in the VXI mainframe, with VXI-MXI-2 interface.
BR,
Pradeeban
