How do I listen to a USB port?

[exo]

I have a separate program running on a Windows Machine.  It transferrs data using a USB port.  Can I monitor the communications in LabView?

[MikeS81]

Hi exo,

where do you like to monitor? How does the data transfer work?

Mike

[exo]

No sure what you mean.  My manufacture supplied detector's code sends data from their electronics to the computer through a USB port.  Can I watch the USB port from LV?

[smercurio_fc]

And we don't really know what you mean. The USB interface isn't like a serial port interface. You're not going to see a nice sequence of commands. You'd basically see some bytes, depending on which transfer is currently being done. And there are 4 types of transfers on the USB bus: isochronous, interrupt, bulk, and control. USB communication is also in the form of packets.

You may want to start with Intaris's excellent nugget on USB communication in LabVIEW.

[slipstick]

I don't know how to monitor it directly, but you might try Snoopy Pro, which monitors USB, and access that via the System exec vi.

[exo]

I would be happy just to be able to monitor whether or not any information is being sent through the port.  I know the sequence of transfers so I should be able to figure out what is being transfered.

[Intaris]

Then snoopy pro is your solution.