PXI-6682 read IEEE-1588 timestamp from 7953R over RTSI bus

Question

Hi,
I am relatively new to LabVIEW
programming, although I have two years of hard experience using LabVIEW
FPGA tools.
So, I
have a PXI-1033 chassis, and I have plugged in an PXI-6682 IEEE-1588
card into slot 2 and a PXI-7953R card into slot 4.  (Random selection
for slot 4)  What I am trying to do is read the GPS timestamp from the
6682 card via the RTSI lines directly into the 7953R FPGA card.
 Unfortunately, I have no idea where to start and what to read, and all
the examples (keywords: RTSI, IEEE-1588)  that I find are for how to
read the IEEE-1588 timestamp inside the Host Operating system and
nothing tells me how to do it directly from the FPGA.  My goal is to
build a machine that timestamps network packets that are being read by
the FPGA hosted inside the PXI-7953R card.
Can anybody point me in the right direction?  I
basically want to learn more about RTSI, where the PXI-6682 outputs its
IEEE-1588 timestamp, and how data is transferred over the RTSI bus from
inside a PXI chassis.
Thanks,
John

Answer 1

Thanks for the response Alejandro,
I have a 7953R FlexRIO board with the Mimas Prevas Dual Gigabit Adapter Module (http://www.prevas.com/ethernet_simulator.html) plugged in.  Ethernet packets enter the Mimas Dual Gigabit Adapter and then go directly to the FPGA as raw Ethernet frames.
From what you are telling me it seems like I cannot have a timestamp go from the PXI-6682 to the 7953R via the RTSI lines and to then be appended to the end of the ethernet frame before being retrasmitted out the other port of the Dual Gigabit Adapter. (With proper recalculation of the 32 bit CRC being done inside the FPGA of course)
I will do some more reading of the manuals and will then call NI Support.
Thanks again!