Kvaser Leaf light does not show up in max even after refreshing

[aditya1992]

I am using a Kvaser Leaf light HS hardware for CAN to USB. I have installed all its drivers from the KVASER website. When using with there sotware CANKING it works perfectly. BUT I am not able to detect it in MAX and LABVIEW. Any suggestions?????

[jcarmody]

I'm not sure I've ever seen my Kvaser devices in Max, but I can see them in Windows' device manager.

Here's how I identify the Kvaser leafs in one of my systems:

[aditya1992]

I am new working in labview.... so if you could guide me a little. ...

I am able to see the kvaser hardware in device manager

so, do i need to make this VI posted by you in labview to check the kvaser hardware or is it available in some library?

Also i tried kvCanGetNumberOfChannels.vi and it shows 0.

[jcarmody]

You'll need to initialize before trying to do anything (like getting the channel count).

The snippet in my first post can be dragged into your block diagram (if you're using one of the newer versions of LabVIEW) - http://www.ni.com/white-paper/9330/en

I've attached a copy of that VI saved back to LabVIEW 8.2.  If you don't have the OpenG VIs installed (the green icons on the block diagram) you can just delete them.

<edited to add> Take a look at the example included with the Kvaser pallet (kvCanExample1.vi).

[aditya1992]

I am able to get the number of channels using the vi by Kvaser. But when I run other VI's I get an error stating ''handle is invalid''. I checked the channel handle number from CAN devices application. It is 0 which I entered in the input handle number in the VI's. But still I get the message ''handle is invalid''.... Any suggestions ??

[aditya1992]

[jcarmody]

Are you just running the VIs from the Kvaser pallet or have you written a VI that uses them?  The second method is preferred because you can run the CAN Handle from one VI to the next.

Can you post your code?  That will help us better answer your questions.

[jcarmody]

I just noticed your last post.  Try opening the CAN port and turning the bus on before reading.  The Kvaser sample shows how to configure the port before turning the bus on, too.  You're likely to need to do that in order to communicate with your target.

[aditya1992]

Hey Jim

The last snippet you gave me gives an error '' No more handles '' . It is error code -9. Shall I continue to run with this error or I am making some mistake ???

Thank You

Aditya Dalakoti

[jcarmody]

Does it give you that error right away, or only after you've run it a bunch of times?  Try restarting LabVIEW and running it again.  I've seen that error during development where I repeatedly start my software and restarting LabVIEW fixes it.  I've never tried to resolve it and it has never been a problem in production.  Man, that makes me sound lazy...