private async Task SetCurrentAndTakeELSpec()
{
await Task.Run(async() =>
{
Debug.WriteLine("SetCurrentAndTakeELSpec");
KE2400 = await Keithley2400Controller.CreateAsync();
KE6485 = await Keithley6485Controller.CreateAsync();
ELSpecCurrent = Convert.ToDouble(await CalculateCurrentForELSpec());
await KE2400.SetCurrent(Convert.ToDecimal(ELSpecCurrent));
await Task.Delay(1111).ConfigureAwait(false);
presentPhotoCurrent = await KE6485.FetchPhotocurrentMeasurement();
ELSpecData = new ObservableCollection <ELSpecDatum>(await PRCamera.ELSpecMeasurement().ConfigureAwait(false));
ELSpecPhotoCurrent = Convert.ToDouble((presentPhotoCurrent + await KE6485.FetchPhotocurrentMeasurement()) / 2.0m);
await Task.Delay(1111).ConfigureAwait(false);
}).ConfigureAwait(false);
}
public async Task RunVoltageSweep(CancellationToken token = new CancellationToken(), LJVScanSpec spec = null)
{
await Task.Run(async() =>
{
Debug.WriteLine("RunVoltageSweep Task");
if (spec != null)
{
ActiveLJVScanSpec = spec;
}
await Task.Delay(TimeSpan.FromSeconds(3)).ConfigureAwait(false);
RawLJVData = new ObservableCollection <RawLJVDatum>();
KE2400 = await Keithley2400Controller.CreateAsync().ConfigureAwait(false);
KE6485 = await Keithley6485Controller.CreateAsync().ConfigureAwait(false);
await Task.Delay(TimeSpan.FromSeconds(1)).ConfigureAwait(false);
await KE2400.TurnOnSource(ActiveLJVScanSpec.StartVoltage);
await Task.Delay(TimeSpan.FromSeconds(1)).ConfigureAwait(false);
bool hasTakenCameraMeasurement = false;
PRCamera.ExceededMeasurementRange = false;
//if we're using the PR650 need to set params:
//1:MS-75,2:Sl-1X,0:integration time,1:SI units (cd/m^2)
if (batchTestSystem == "BTS1")
{
await PRCamera.SendCommandAndWaitForResponse("S1,2,,,,0,,1");
}
PresentVoltage = ActiveLJVScanSpec.StartVoltage;
presentLuminance = 0;
presentCurrent = 0;
ELSpecCurrent = -1;
assumedAlpha = 3.33E9;
decimal photoCurrentA;//need separate variable from presentphotocurrent to prevent errors with calcs
int picoRangeCounter = 0;
int sourceRangeCounter = 0;
int timeoutCount = 0;
while (!token.IsCancellationRequested && StopConditionsAreNotMet())
{
if (PresentVoltage > ActiveLJVScanSpec.StartVoltage)
{
await KE2400.SetNextVoltageStep(PresentVoltage).ConfigureAwait(false);
}
//1st photocurrent reading
photoCurrentA = await KE6485.FetchPhotocurrentMeasurement().ConfigureAwait(false);
presentPhotoCurrent = photoCurrentA;
PresentCurrent = await KE2400.FetchCurrentMeasurement().ConfigureAwait(false);
//take a second measurement if range changes to smooth data from unstable devices
if (presentPhotoCurrent > picoRanges[picoRangeCounter])
{
photoCurrentA = await KE6485.FetchPhotocurrentMeasurement();
presentPhotoCurrent = photoCurrentA;
PresentCurrent = await KE2400.FetchCurrentMeasurement();
picoRangeCounter++;
}
//take a second measurement if range changes to smooth data from unstable devices
if (PresentCurrent > sourceRanges[sourceRangeCounter])
{
photoCurrentA = await KE6485.FetchPhotocurrentMeasurement();
presentPhotoCurrent = photoCurrentA;
PresentCurrent = await KE2400.FetchCurrentMeasurement();
sourceRangeCounter++;
}
if (presentCurrent != -1 && presentPhotoCurrent != -1)//-1 response == measurement timeout
{
var rawDatum = new RawLJVDatum
{
Voltage = PresentVoltage,
Current = presentCurrent,
PhotoCurrentA = photoCurrentA,
Resistance = Math.Round(presentVoltage / presentCurrent),//R=V/I
TimeStamp = DateTime.Now
};
Debug.WriteLine("PresentVoltage: " + PresentVoltage);
Debug.WriteLine("PresentCurrent: " + PresentCurrent);
//2nd photocurrent reading
rawDatum.PhotoCurrentB = await KE6485.FetchPhotocurrentMeasurement();
if (Convert.ToDouble(presentPhotoCurrent) * assumedAlpha > 42)
{
if (!PRCamera.ExceededMeasurementRange)
{
var cameraDatum = await PRCamera.LuminanceMeasurement();
if (!PRCamera.ExceededMeasurementRange)
{
rawDatum.CameraLuminance = cameraDatum.Luminance;
rawDatum.CameraCIEx = cameraDatum.CIEx;
rawDatum.CameraCIEy = cameraDatum.CIEy;
//3rd photocurrent reading
rawDatum.PhotoCurrentC = await KE6485.FetchPhotocurrentMeasurement();
presentPhotoCurrent = rawDatum.PhotoCurrentC;
presentLuminance = cameraDatum.Luminance;
assumedAlpha = Convert.ToDouble(cameraDatum.Luminance / rawDatum.PhotoCurrentC);
//presentLuminance = cameraDatum.Luminance;
Debug.Write("Luminance: " + rawDatum.CameraLuminance);
Debug.Write("CIEx: " + rawDatum.CameraCIEx);
Debug.WriteLine("CIEy: " + rawDatum.CameraCIEy);
hasTakenCameraMeasurement = true;
}
else
{
var alphaAndR2 = await DataProcessingService.LEDCalculator.AlphaFromRawData(RawLJVData.ToList());
assumedAlpha = alphaAndR2.Item1;
}
}
}
else
{
rawDatum.PhotoCurrentC = rawDatum.PhotoCurrentA;
}
App.Current.Dispatcher.Invoke((Action) delegate
{
RawLJVData.Add(rawDatum);
RawLJVData.OrderByDescending(x => x.Voltage);
});
PresentVoltage += ActiveLJVScanSpec.StepSize;
}
else if (timeoutCount < 1)//measurement timed out so try again. ONE strikes and you're out
{
timeoutCount++;
await Task.Delay(1111);
}
else//f**k it we're skipping this step
{
PresentVoltage += ActiveLJVScanSpec.StepSize;
}
}
if (!token.IsCancellationRequested && !PRCamera.ExceededMeasurementRange)
{
Debug.WriteLine("LJVScanCoordinator calls for ELSpecMeasurement");
presentPhotoCurrent = await KE6485.FetchPhotocurrentMeasurement();
var elspecMeas = await PRCamera.ELSpecMeasurement(hasTakenCameraMeasurement).ConfigureAwait(false);
ELSpecData = new ObservableCollection <ELSpecDatum>(elspecMeas);
//account for changing current during ELSpec measurement
ELSpecCurrent = Convert.ToDouble((PresentCurrent + await KE2400.FetchCurrentMeasurement()) / 2.0m);
ELSpecPhotoCurrent = Convert.ToDouble((presentPhotoCurrent + await KE6485.FetchPhotocurrentMeasurement()) / 2.0m);
}
else if (PRCamera.ExceededMeasurementRange)
{
await SetCurrentAndTakeELSpec().ConfigureAwait(false);
}
Debug.WriteLine("closing keithleys");
await Task.Delay(1111).ConfigureAwait(false);
await KE2400.CloseGPIBDevice().ConfigureAwait(false);
await KE6485.CloseGPIBDevice().ConfigureAwait(false);
}).ConfigureAwait(false);
}
public static Task <Keithley6485Controller> CreateAsync()
{
var ret = new Keithley6485Controller();
return(ret.InitializeAsync());
}