sorry for this rather basic question :
i have an N-sample (multi channel) task that takes , say.. 100 milliseconds or less,
and i want it to run exactly once.
this code i wrote to output a TTL (single channel, obviously) just keeps outputting the TTL over and over again,
which is sort of the opposite of "exactly once" .
double[] TTL = { 0, 7, 7, 0 };
double outRate = 5000;
NIDAQ.Task oTask = new NIDAQ.Task("TTL");
oTask.AOChannels.CreateVoltageChannel(
this.textBox1.Text, "", -10, 10, NIDAQ.AOVoltageUnits.Volts); //TTL
oTask.Timing.ConfigureSampleClock("",
outRate, NIDAQ.SampleClockActiveEdge.Rising,
NIDAQ.SampleQuantityMode.ContinuousSamples);
this.TTLWriter = new NationalInstruments.DAQmx.AnalogSingleChannelWriter(oTask.Stream);
TTLWriter.WriteMultiSample(true, this.TTL);
i've also tried using a False argument in the WriteMultiSample,
as in:
TTLWriter.WriteMultiSample(false, this.TTL);
oTask.Start();
oTask.WaitUntilDone();
oTask.Stop();
oTask.Dispose();
but that has the same effect -- sending a neverending stream of TTLs !
how do i just run an output task exactly once?
(the device i'm using is a PCI 6733)
thanks!
