Using non NI usb raw device

[DrG]

I have a J&J engineering physiological monitoring system,model: I-330C2 GP Plus.
I have problem to communicate with this device. The device is a USB RAW device, the device came with its own software, but i'd like to develope my system using labview. This device has its own unique command set and I don't know this command set. How can I bypass this problem to communicate with the device using labview? If you have some examples i'll be glad to recieve them. If anyone had worked with that type of devices before please send me a command set.
Thank you.

[JoshuaP]

Reverse engineering a USB device that you did not build or design is extremely difficult to impossible without having an in-depth understanding on all of the commands that are required to configure and setup the device correctly. Every USB RAW device is different and there is no stand on how the commands are layed out in the USB firmware. You could try using some tools like USB Monitor to see what information is being transferred when you are using the driver, but it is not going to be easy to recreate the driver using VISA or any other API. This isn't serial or GPIB.

You would be better off just reusing their DLL in LabVIEW. You could use the Call Library Function Node in LabVIEW to make calls to their DLL. This way all you have to do is figure out what
functions and parameters are required when calling their DLL. The manufacturer might even be able to tell you exactly what all of the functions and parameters are if they support any kind of C API. You could even put each function in its own sub-vi, so from a high level in LabVIEW you would only be calling sub-VIs. This may sound difficult, but it would be easier to reuse their DLL then trying to reverse engineer the instrument. Working with USB is just as difficult as working with PCI.

I hope this helps out.

-Josh