change the driver existing (newbie question)?

Hello

We try to change an existing driver, but we are fairly new to Labview. We have a few generic questions, but I'll give you some specific info on what we are trying to do as well.

We downloaded a driver (for NDI Polaris motion tracker) of the site NOR and want to change that a little bit.

The zip file contains a subdirectory ndipolaris with 2 files .llb and some .mnu files.

Our first problem is that if we just open the .llb files, there are a lot of vi in there (including examples of work), but there is no project files, or class definitions. What seems to prevent us from creating a new class that derives from a class that is apparently set in the driver (but which we don't seem to have the definition). Maybe a driver can be distributed without these definitions such as you can use it only, but not change?

Our second problem is that if we use the method of 'create the new existing driver driver', the Polaris NDI does not appear in the list of existing drivers. (It has copied the directory ndipolaris to the labview/instr.lib directory and restarted labview). (This is probably not a major problem that we could change just the existing driver instead).

Note that the existing driver works well. We just add a timestamp in the data. The existing driver apparently has a class (called "Info Tool", which is a cluster of a few different types of data) for all these info than the Polaris returns, so we thought to change this class or to derive a new class with added timestamp.

Sorry if this is a trivial question. Thanks for the pointers.

Kris

Hi Dennis

Thanks to your suggestions, we settled it. We were baffled by the fact that you cannot add controls for "schema". Here's what we did:

The data group was built using the "bundle by name" function, which takes a bunch of 'model' as input. It is this model that we had to change. However, as the model was a 'constant', it does not appear on the front panel and so we could not add any controls to it. For example, when you view the block diagram, we right-click on the clustering model, converted to a control, and then passed to the façade, created a new control (string) on the front panel and place in the control corresponding to the cluster model. Then we moved to the block diagram and convert our cluster model to a 'constant '.

Not simple I think, but once you know (get help from you and read a bit of the operating instructions...), it's ok.

Thanks again

Kris

Tags: NI Software

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