Jump to content

selfmade trigger on pxi lane


i2dx

Recommended Posts

Hi folks,

I am searching for a possibility to send a "hand made custom" single digital pulse on a PXI lane, to trigger some of my DAQ-tasks. With traditional DAQ that could be done easily: (>>gimme one ping vasilli, only one ping<< ;) )

post-885-1156146101.png?width=400

does anyone know how to archieve this with DAQmx?

I know, I could use the AoStartTrigger, the AiStartTrigger, etc but this is plan B. Plan C would be to create one single pulse with a counter, but first of all, I'd like to be able to set a PXI Line "high" ...

thanks in advance,

CB

Link to comment
Hi folks,

I am searching for a possibility to send a "hand made custom" single digital pulse on a PXI lane, to trigger some of my DAQ-tasks. With traditional DAQ that could be done easily: (>>gimme one ping vasilli, only one ping<< ;) )

post-885-1156146101.png?width=400

does anyone know how to archieve this with DAQmx?

I know, I could use the AoStartTrigger, the AiStartTrigger, etc but this is plan B. Plan C would be to create one single pulse with a counter, but first of all, I'd like to be able to set a PXI Line "high" ...

thanks in advance,

CB

Link to comment

Hi,

I dont believe there is an exact equivant of this functionality in NI-DAQmx. There is a "DAQmx Connect Signal.vi that allows you route various signals to RTSI/PXI lines. You might try routing an internal clock to one of these lines to drive the line. Call DAQmx Disconnect Signal when you are done.

If you have multiple tasks that you want to start together, you can simply use the DAQmx Trigger vi in all the "slave" tasks, and specify "/DevX/aiStartTrigger" as the trigger source. DAQmx takes care of all the routing across the RTSI bus (assuming the devices are connected by RTSI).

Your plan B or C should work as well.

Rajesh Vaidya, Ph.D

Senior Software Engineer

National Instruments

P.S. Apologies for the earlier empty post.. hit the "add reply" button prematurely :oops:

Link to comment
Hi,

I dont believe there is an exact equivant of this functionality in NI-DAQmx. There is a "DAQmx Connect Signal.vi that allows you route various signals to RTSI/PXI lines. You might try routing an internal clock to one of these lines to drive the line. Call DAQmx Disconnect Signal when you are done.

If you have multiple tasks that you want to start together, you can simply use the DAQmx Trigger vi in all the "slave" tasks, and specify "/DevX/aiStartTrigger" as the trigger source. DAQmx takes care of all the routing across the RTSI bus (assuming the devices are connected by RTSI).

Your plan B or C should work as well.

Rajesh Vaidya, Ph.D

Senior Software Engineer

National Instruments

P.S. Apologies for the earlier empty post.. hit the "add reply" button prematurely :oops:

thanks a lot. I am allready using "plan B" in other projects.

If there is no such functionality in DAQmx, then I'll continue using plan B until DAQmx will get that feature :)

Link to comment

I wish I could say "of course it will be in the next release" :)

In all seriousness though, if you would like such a feature in NI-DAQmx, please email me a "feature request" describing

a) how you might use such a feature

b) the problems (if any) with existing alternatives.

This will be discussed at the new features "pow-wow", and might make the cut, especially if there are no good alternatives [ and if the HW folks assure us that such a thing is possible for the new DAQ architectures they are cooking up]

My email is: rajesh.vaidya@ni.com

Cheers,

Rajesh Vaidya, Ph.D

Senior Software Engineer

National Instruments

Link to comment
I wish I could say "of course it will be in the next release" :)

In all seriousness though, if you would like such a feature in NI-DAQmx, please email me a "feature request" describing

a) how you might use such a feature

b) the problems (if any) with existing alternatives.

This will be discussed at the new features "pow-wow", and might make the cut, especially if there are no good alternatives [ and if the HW folks assure us that such a thing is possible for the new DAQ architectures they are cooking up]

thank you. It's not THAT important. I don't want to bother the busy folks with such minor issues. Maybe such a feature comes back sometimes - or someone realy needs it, for whatever reason - but until then, I can wait :)

cheers

CB

Link to comment

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use.