HOWTO generate a pulse for each Image Grabed?

Hello

I use a 7852DAQ card and a PCIe1429 framegrabber.

In the momment I'm images grabing at 20 Hz with analog values PCIe1429 and measurement at 1 kHz with the 7852DAQ card.

Now I would like to synchronize this measure two, I know what analog value is linked to my image.

I think that the best way to get good timing is to generate a signal to each captured image. The best way of communication between the two cards should be triggering RTSI lines.

With the IMAQ generate Pulse3 VI I was able to generate a continuous impulse signal a reading with DAQ card mit but this isn't what I want.

Then I tried the Trigger IMAQ Drive2 VI.

I did IMAQ Init and IMAQ create, IMAQ Grab Setup then the Trigger IMAQ Drive2 VI and then some time loop with IMAQ Grab acquire.

My setup is Type of trigger "RTSI", number "0", trigger "Vertical sync Signal" drive and polarity of command high 'True '.

My time loop has a 50ms in him waiting, so I should get a picture every 50ms and also get a pulse every 50ms. But this isn´t happenig. The pulses come about every second. When I use Trigger Drive 'Start Frame' I get the same behavior.

So, what's the problem? I do not understand IMAQ Trigger Drive2 VI bad functionality?

Thank you

Hello Westgate,

have you tried to use the player to trigger 'Start Frame' or 'Ongoing Acquisition' instead of 'vertical sync?

In addition, you can check your FPGA code running on the R Series DAQ card: how you analyze the trigger in FPGA line, what is the interval of time to detect the pulse,...?

Best regards
Sebastian

Tags: NI Hardware

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