How do I change the pulse frequency of a continious pulse generation while the task is running ?

[udicom]

I create the task:

IOTask.COChannels.CreatePulseChannelFrequency(c, "x", COPulseFrequencyUnits.Hertz, COPulseIdleState.Low, 0, f, d);

IOTask.Timing.SampleTimingType = SampleTimingType.Implicit;

// IOTask.Timing.ConfigureSampleClock("internal", 10000000, SampleClockActiveEdge.Rising, SampleQuantityMode.ContinuousSamples, 1000);

IOTask.Control(TaskAction.Start);

and it is doning fine.

Then I try to change the frequency:

f = f + amount;

IOTask.Control(TaskAction.Stop);

IOTask.COChannels["x"].PulseFrequency = f;

IOTask.Control(TaskAction.Start);

This does not throw an exception but creates only one pulse after the start and does not go to continious mode.

Any ideas why ???

Thanks,  Bernhard

[Dippi]

Hi Bernhard,

we need more information about your problem.

Which device are you using, which driver,...

Best regards

Dippi 

[udicom]

We are using a USB6212 with NIDaqMx 8.6

[Dippi]

Hi Bernhard,

unfortunately it is not possible to change the frequency while the task is running.

You have to stop the task, change the frequency and start it again.

This is implemented in DAQmx driver like this.

Best regards

Dippi