how can I make a labview application for a usb-device?

[nicolas 538]

I've built an application using the FT8U245AM from FTDI. This is a chip that converts signals into usb signals. Now I want to set parameters using labview. There is a driver provided with the chip, that makes it possible to turn the usb port into a virtual com-port. But how do I continue from here? Do I write my application as if it were a classic serial port device, using VISA, or is it more complicated than this?

[Chris_Rake]

Since the device comes with a driver that behaves as a regular serial com port, then you should be able to use the VISA serial vi's to communicate. The device driver will then be responsible for handling USB commincation "under the hood" - and out of your hands. In this case, you'll be sending / receiving serial data per the driver's specifications. Hope this helps!