CANCard dll call

[EdDickens]

Greetings to all,

I'm having troubles getting one function of a dll written in C to work for me. I'm sure it's something in my setup, but I can't figure it out because I'm not a C programmer, and none of the C programmers here know how to set things up in LabView. So I was wondering if anyone out there could help me translate the info from C to G.

I have the functional description of the dll, and the source code of a test C program in which the function is called successfully, so I do know the function itself is ok. I also have screen shots of the block diagram and the setup dialog for the call library function.

I have written a simple program to read and write with a Softing CANCard2. It's running on a Toshiba Tecra 8100 with Win2k and LV6
.0.2 The program runs fine as long as I do not run this particular function. If I run the function, LabView immediately crashes. I can restart LabView with no problem and run the program again with no problem.

The files are attached in the zip file.

Thanks
Ed

[wxfield]

Ed,

Lets start with this example. You had a few mistakes in the stuff you sent along. If you want, send along the dll, and I'll try to make a working interface for you. In the meanwhile, see if the attached vi file works for you.

Kindest regards,
Warren Crossfield

[EdDickens]

Warren,

That setup helped. It no longer crashes LabView, but it now produces a timeout error and returns all zeros.

I've attached the dll for you to look at. This is my first attempt at using dll's so it's new to me.

Thanks
Ed

[wxfield]

Ed,

Actually, I think we are all set. I don't have the operational manual to this device so I don't know exactly what needs to be done. BUT..if you look at the C example file that comes with the product (that you origianlly sent along). Main{} has a series of initialization steps that happen to the board before you can query it. If you look at line 518 of the example C file you will see you have to select the DPRM operational mode first. If you don't do this, you will get a -4 timeout on the get_version function we just worked on.

So go thru the main{} function and see what they do to initialize the card, THEN do your operations on it.

Does that help?

Kindest,
Warren