How to control USB using Labview?

[vishhh]

Hi,

Can any one tell me how Can I control USB(actually i want input through USB) devise using Labview?

I tried with "inport.vi" and gave address of my enhanced USB host controller in the address field, but could not satisfy me.

I want to check frequency of TTL signal coming from Function generator.

For that i want to count number of pulses in a specified time.

I have tried with Parallel port, but i could count only for 5kHz frequency signal.

and I want count for signal in 1M Hz range.

Can any one give me example code for taking input from USB ?

Thanks.

Regards,

Vishal

[Mathan]

If you have time please go through these nice nuggets 1 and 2

Message Edited by nilovers on 04-03-2009 01:44 AM

[JK1]

Look at the tutorial link given here: http://zone.ni.com/devzone/cda/tut/p/id/4478

It gives introduction to access USB devices (NI and non NI).  Have a look at it and post back for queries.