Getting Absolute timestamps from FPGA 7831R

I am using a LIN card in my PXI Chassis. This is not an NI product and it cannot access any triggering lines. The device itself returns an array of timestamped measurements but the problem is that the are relative timestamps. I need to have an absolute timestamp so that I can compare timing with other DAQ devices. The only way I can access this is by using a 5V trigger output line. I can set this to trigger on each identifier.
My problem is how to acquire an absolute timestamp. I would not need to get one very often. once every few seconds would be sufficient at worst case.
I have used an M series card analog input which can be triggered and this has given good results.
But I have to use this card for other measurements at the same time so I cannot normally use it as I wish.
The only other option that I have is an FPGA card. RIO 7831R.
Does anyone know how to get absolute timestamps from such a card without having to connect it to any other card?
This would be a great help.
Thanks in advance
Jimmy

Hi Jimmy,
You can make product suggestions using links on the following web page:
http://digital.ni.com/public.nsf/websearch/EDA7C01C684ACB6286256FF0000238D5?OpenDocument
I'm not sure there is anything else we can do to help you - the only other alternative would be to use the FPGA board to monitor this trigger line, and when it sees a trigger fires an IRQ to the host program which is waiting on this - and then at this point get the current time in software.
I'm not sure that there is a more accurate way of getting this timing information, as it seems its just a limitation of this LIN card that you have.
Regards
Hannah
NIUK & Ireland

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Attachments:
mod_all.png ‏68 KB
fft_all.png ‏52 KB

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>
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File f=new File(Filename);
f.getAbsolutePath();
Now, in the output am getting the absolute path of the file as d:/XYZ/Filename. Is there any way to get the output as xxx.xx.x.x/XYZ/FileName ? Can someone please suggest why the server details are not fetched and instead the directory name is fetched.
I am running the program to get absolute path of a file in my remote machine. and for accessing that remote file from my machine, I use xxx.xx.x.x/XYZ/FileName.
Thanks in advance.

I'm going to take it a step further and guess at what the OP is going to say next.
On host w.x.y.z there's a file /a/b/share/some_dir/file.txt.
Host w.x.y.z is sharing the /a/b/share/ directory as SHARE.
Client mounts \\w.x.y.z\SHARE as D:, so that he sees D:/some_dir/file.txt.
OP now wants to know not just that D:/some_dir/file.txt is \\w.x.y.z\SHARE/some_dir/file.txt, but also wants to know that on w.x.y.z, SHARE corresponds to /a/b/share.
@OP: If that's what you want, forget it. Part of the premise of file common drive/directory sharing protocols is that the client does not know or care and does not need to know or care what the absolute path is on the serving host. It's none of his business.

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