Labview DAQmx triggering

[sa0237]

Hello all! I would like to output some analog and digital waveforms using my Daq BNC-2110, which uses PCI 6711. I can output them normally without triggering them. However, I wanted to use digital edge triggering out from a DO line and connect the hardwire to a PFI line to have the triggering pulse as in the code. But this is not working. Also, how do I do it without the while loop because it shows some error?

[mcduff]

Not sure I understand completely what you are trying to accomplish, but I see a couple of things that caught my eye:

1. Why are you using the PFI input as the sample clock? Use one of the internal clocks instead in all of your tasks. Your PFI input should only be used for triggering.
2. You have two AO tasks. Does your device support two separate tasks? I would suggest combining both outputs into a single task. Set the write to NChannels instead of 1channel.

[sa0237]

Thank you! I changed the timing to continuous sample and sample clock only, and now this outputs only one waveform. How do I generate them with N channels? I tried building an array and feeding it to write, but it combined them, not unique waveforms.

[sa0237]

This is working, but the sample rate is not equal, which should not be, as I am generating same number of samples. Is there any way to modify it?

[mcduff]

The loop that makes the Ramp signal on your plot does not have the same number of points as the other waveforms in the plot. The other waveforms have 11400 points; if I set the number of cycles to 10 for the Ramp signal with your other default values, you get 11410 points for the Ramp. If I change the flyback points to 139 from 140 then I get 11400 points.

If you explain better what kind of waveforms you want, your loop could probably be greatly simplified.