Hello,I’m trying to read data continuously from a NI USB-6251, I’ve already look at the examples and trying to find how to do it.I would like to acquire an array of bool and then process it to determine the duration of a pulse (I’ve already made it on the counter, but now I need to do it on without counter); I want to do it for a single channel.Thanks for your help!My code for now:***********************************************************myTask = new Task(pTaskName);myTask.DIChannels.CreateChannel(pChan, pTaskName + "Chan", ChannelLineGrouping.OneChannelForEachLine);/*myTask.Timing.ConfigureSampleClock("", 200, SampleClockActiveEdge.Rising, SampleQuantityMode.ContinuousSamples, 200);*/ myCallBack = new AsyncCallback(FlushBuffer);myDIReader = new DigitalSingleChannelReader(myTask.Stream);myDIReader.BeginReadSingleSampleMultiLine(myCallBack, null);-------------------------------------------------- public void FlushBuffer(IAsyncResult ar) { Trace.Write("ReadChan FlushBuffer : "); try { bool[] myTabs = myDIReader.ReadSingleSampleMultiLine(); Trace.Write(myTabs.Length); } catch (DaqException daqex) { MessageBox.Show(daqex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error); } }***********************************************************I want to do it with the external clock.

I’ve saw on this forum, that only one task cans access to a port even if this port is divided into multichannel, is that right?So, I’ve got to find another way to measure pulse width without counter? (I’ve maybe an idea).

Digital I/O

[C#] Digital Read Continuous

Solved!

Nice to hear you solved it!. Congrats;-)

You can always put your code in a zip file and add is as an attachement to your post if it doesn't fit in a regular message. It would be nice to have it available for the community.

Best Regards

Michiel
Applications Engineer
NI Belgium
http://www.ni.com/ask

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There it's 🙂

Vincent.
Belgian student doing his placement, trying to speak English...
Trying to use NI USB-6251 with C# w/ Measurement Studio.

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Digital I/O

[C#] Digital Read Continuous

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