In Reply to: No Signal in D+ D- of PDIUSBD12 posted by Amir on 07/17/02 at 5:12 PM:
1. no you can't - it is a slave device - the master being the PC.
2. are you getting passed the usb enumeration stage?
Usb isn't your average COM or LTP interface - it takes a whole lot of firmware just to get passed the enumeration stage - that's when you have to start worring about the PC side of things - develop your own driver or enumerate as a standard class device (where the drivers are supplied with the window$ OS)
John Hyde & Jan Axelson have written interesting books covering the practicalities of Usb - check out their websites - do a search at www.google.com
hope this helps