LabVIEW FPGA PXI - Help on Fast internal Trigger (DStar?)

[bcouraud]

Hello everyone,

I work on a PXIe-1085 chassi, that has a PXIe-8135 controller, and 2 flexrios: one FPGA module 7966, connected on slot 2 and another FPGA module 7975 connected to slot 3. I do not have any system timing controller (although I do not really understand what that is tbh).

I want to send a trigger from module 7975 (slot 3) to module 7966 (slot 2). 

I have used one of the 8 eight triggers configured (PXI Trig_0-7) to do this, but they are too slow.

So I was trying to use another way to send the trigger signal, still using the PXI backplane. 

I have one clock DStarA, and two other DStar ressources namely PXIe_DStarB and PXIe_DStarC. 

I read in different places that PXIe_DStarC could work. So I tried to replace my simple trig that used PXI_Trig0 into a trig that uses PXIe_DStarC, but the result is that no trig signal is seen by the other FPGA. I run this trig in a Timed Loop using the IO Module Clock, as shown in the image attached (as I did for the PXI_Trig0 that worked well).

Therefore, I wanted to know if there are any advice/examples on how to use fast triggers, such as PXIe_DStarC (or A or B, whatever works, even the PXI_Star, but I saw that it requires a System Timing Controller - and I do not have such a module, if this is a module). 

Thanks a LOT for your kind help!!

[pholly]

The DStar triggers connect every slot to the system timing slot. You can send a trigger using DStar from any slot to a timing and sync card in the system timing slot or from a timing and sync card in the system timing slot to any other slot. You cannot send a trigger directly from a regular PXIe module directly to another regular PXIe module using the DStar triggers. To use the DStar trigger you would need to purchase a timing and sync module, such as the PXIe-6674T, which supports the DStar triggers.

What is the Star Trigger on the PXI Backplane? - NI

pxi-timing-and-synchronization-modules.pdf