//Measures the separation of two PW on PFI 9(P2_1) and PFI10(P2_2)
public double Meas2EdgeSeparation(string lines, CITwoEdgeSeparationFirstEdge firstEdge, CITwoEdgeSeparationSecondEdge secondEdge)
{
double PW = 0;
int i_Timeout = 2000; //unit:ms
double minPW_InSeconds = 0.00000010;
double maxPW_InSeconds = 0.838860750;
PW = Meas2EdgeSeparation(lines, minPW_InSeconds, maxPW_InSeconds, firstEdge, secondEdge, i_Timeout);
return(PW);
}
public double Meas2EdgeSeparation(string lines, double min, double max, CITwoEdgeSeparationFirstEdge firstEdge, CITwoEdgeSeparationSecondEdge secondEdge, int Timeout)
{
// This example uses the default source (or gate) terminal for
// the counter of your device. To determine what the default
// counter pins for your device are or to set a different source
// (or gate) pin, refer to the Connecting Counter Signals topic
// in the NI-DAQmx Help (search for "Connecting Counter Signals").
// Uses default PFI 9/P2.1 as the pulse input.
double pulseGap = 0;
Task myTask = null;
NationalInstruments.DAQmx.CounterReader myCounterReader;
try
{
myTask = new Task();
myTask.Stream.Timeout = Timeout;
myTask.CIChannels.CreateTwoEdgeSeparationChannel(
lines, "", min, max,
firstEdge, secondEdge, CITwoEdgeSeparationUnits.Seconds);
myCounterReader = new CounterReader(myTask.Stream);
pulseGap = myCounterReader.ReadSingleSampleDouble();
}
catch (DaqException exception)
{
mstr_Error = exception.Message;
pulseGap = 0;
}
finally
{
if (myTask != null)
{
myTask.Dispose();
}
}
return(pulseGap);
}
