Using PXI trigger to synchronize controller with fpga

[tom_ifms]

Hi

I have a 8108-controller and a 7852R fpga in a 1062Q-PXI-Chassis. And I would like to run a timed loop on the controller synchronously to the fpga. But I'm not getting anywhere. There are several things that might be usefull:

1. There is a Chassis-clock. But I only manage to access it on the fpga

2. There are chassis trigger lines (is that the same as PXI-Trigger bus?). Also I only mange to access them on the fpga

3. There a trigger input/output on the front of the controller (which I might be able to connect to the clock output of the chassis). But I don't manage to access it in the software.

Can anybody give me a hint on how to achieve my task?

Thanks, Thomas

[Vince_CH]

Hi Thomas,

a very good question!

I think in general this is not possible to rout directly the PXITrigger Line. Normally is it be done over a DAQcard. There you have several methods with the DAQmx driver to route the Tigger line to a task.

What I found is a idea who is realy close to your question:

http://forums.ni.com/t5/LabVIEW-FPGA-Idea-Exchange/Drive-a-host-timed-loop-with-LabVIEW-FPGA-IRQ/idi...