For standard protocols (mass storage, ptp, audio, etc.) just having the protocol and subprotocol ID in the descriptors set should be enough to get the device working. All of these protocols are specced by the USB people and should be available at USB.org . - Marcel On 11/20/06, William Chops Westfield wrote: > >> So... is there some way with the > >> SiLab or FTDI chips to get something similar? No driver required? > >> > It's not that no drivers are required, it's just that the drivers > for certain common usb->serial converters are already included. > For that to happen, you need to have both the correct chip AND you > have to tell the OS that you're one of the recognized serial converters > rather than some strange vendor with some strange device. (Unless there > is some way to tell the OS that you conform to a particular driver spec > even though you have an otherwise unrecognized USB ID?) > > BillW > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist