private void InitDriverChannel(AnalogInChannelsEnum ChannelName, out AgilentU254xAnalogInChannel channel)
{
lock (initDriverChannelLock)
{
switch (ChannelName)
{
case AnalogInChannelsEnum.AIn1:
channel = _driver.AnalogIn.Channels.get_Item(ChannelNamesEnum.AIN1);
break;
case AnalogInChannelsEnum.AIn2:
channel = _driver.AnalogIn.Channels.get_Item(ChannelNamesEnum.AIN2);
break;
case AnalogInChannelsEnum.AIn3:
channel = _driver.AnalogIn.Channels.get_Item(ChannelNamesEnum.AIN3);
break;
case AnalogInChannelsEnum.AIn4:
channel = _driver.AnalogIn.Channels.get_Item(ChannelNamesEnum.AIN4);
break;
default:
throw new ArgumentException();
}
}
}
public void Dispose()
{
if (_channel != null)
{
while (Marshal.ReleaseComObject(_channel) > 0)
{
;
}
_channel = null;
}
}
static void Main(string[] args)
{
Process currProcess = Process.GetCurrentProcess();
// Printing initial memory, occupied by the process
int memsizeInit = getMemoryUsage(ref currProcess);
Console.WriteLine(string.Format("Initial memory occupied by the process is {0}\r\n", memsizeInit));
#region Initializing COM objects
driver = new AgilentU254x();
driver.Initialize(ResourceID, false, true);
driver.DriverOperation.QueryInstrumentStatus = false;
driver.DriverOperation.Cache = false;
driver.DriverOperation.RecordCoercions = false;
driver.DriverOperation.InterchangeCheck = false;
driver.System.TimeoutMilliseconds = 5000;
analogInChannel1 = driver.AnalogIn.Channels.get_Item("AIn1");
analogInChannel2 = driver.AnalogIn.Channels.get_Item("AIn2");
analogInChannel3 = driver.AnalogIn.Channels.get_Item("AIn3");
analogInChannel4 = driver.AnalogIn.Channels.get_Item("AIn4");
analogInChannel1.Configure(AgilentU254xAnalogPolarityEnum.AgilentU254xAnalogPolarityBipolar, 1.25, true);
analogInChannel2.Configure(AgilentU254xAnalogPolarityEnum.AgilentU254xAnalogPolarityBipolar, 1.25, false);
analogInChannel3.Configure(AgilentU254xAnalogPolarityEnum.AgilentU254xAnalogPolarityBipolar, 1.25, false);
analogInChannel4.Configure(AgilentU254xAnalogPolarityEnum.AgilentU254xAnalogPolarityBipolar, 1.25, false);
#endregion
#region Test Acquisition
int samplingFrequency = 500000;
driver.AnalogIn.MultiScan.Configure(samplingFrequency, -1);
driver.AnalogIn.Acquisition.BufferSize = samplingFrequency;
bool acquisitionInProgress = true;
driver.AnalogIn.Acquisition.Start();
var acquisitionTask = Task.Factory.StartNew(new Action(() =>
{
int readingsCounter = 0;
short[] buf = { 0 };
while (acquisitionInProgress)
{
if (driver.AnalogIn.Acquisition.BufferStatus == AgilentU254xBufferStatusEnum.AgilentU254xBufferStatusDataReady)
{
driver.AnalogIn.Acquisition.Fetch(ref buf);
Console.WriteLine(string.Format("Number of readings with sampling frequency {0} is {1}.", samplingFrequency, readingsCounter + 1));
++readingsCounter;
}
}
}));
int numOfSeconds = 10;
Thread.Sleep(numOfSeconds * 1000);
driver.AnalogIn.Acquisition.Stop();
acquisitionInProgress = false;
while (!acquisitionTask.IsCompleted)
{
;
}
#endregion
#region Releasing COM objects
if (analogInChannel4 != null)
{
while (Marshal.ReleaseComObject(analogInChannel4) > 0)
{
;
}
analogInChannel4 = null;
}
if (analogInChannel3 != null)
{
while (Marshal.ReleaseComObject(analogInChannel3) > 0)
{
;
}
analogInChannel3 = null;
}
if (analogInChannel2 != null)
{
while (Marshal.ReleaseComObject(analogInChannel2) > 0)
{
;
}
analogInChannel2 = null;
}
if (analogInChannel1 != null)
{
while (Marshal.ReleaseComObject(analogInChannel1) > 0)
{
;
}
analogInChannel1 = null;
}
if (driver != null)
{
while (Marshal.ReleaseComObject(driver) > 0)
{
;
}
driver = null;
}
#endregion
// Printing memory, occupied by the process after data readings
Console.WriteLine();
int memsizeEnd = getMemoryUsage(ref currProcess);
Console.WriteLine(string.Format("Memory occupied by the process after data readings is {0}\r\n", memsizeEnd));
Console.ReadKey();
}
