universal USB Driver for Labview

[Robert Hecker]

Hello Everybody,

I'm using LabView 6i and I want to communicate to an Microcontroller over
the USB interface. I never heard about a Driver-Libary for LabView which can
be used to send Data over the USB Interface. Is such an Driver available for
LabView?
The only USB Driver I found on the National Instruments home page are Driver
for specific USB Devices like DAQ-Cards etc. But this doesen't help me.

It would be great, if somebody know something about this.

Thanks a lot

Robert

[Aaron Marks]

There are currently no VI's designed to communicate through USB. The reason is this: It is best not to think of USB as a serial port, but rather as a bus. It is like asking when there will be a "PCI Read.vi" and "PCI Write.vi". The protocol for talking to a USB device is specific to each device. You have to open up some channels to the device (how many is specific to the device), and then you have to peek and poke values over those channels in a device-dependent way. I have heard of some users trying to use USB by direct register access or by accessing the windows low level USB API, but I don't know how successful they were.

[Glenn Crompton]

Hi Robert,
Here's something that might help.
I have got a device called a LabJack. go to www.labjack.com
These guys will know what you are talking about as the LabJack interfaces to LabVIEW (and other things) via USB. They have written USB Code Interface Nodes for LabVIEW.
Glenn