> No. The Windows world presents a standard SERIAL DRIVER interface, at
> least that's the theory that is preached. I see no reason why a USB
> serial port wouldn't do the same. USB defines a serial port
> interface, IIRC, which is the same across manufacturers (in theory)
> which would be handled by a single USB driver in our USB stack.
Keep dreaming ...
Example: Mice and keyboards have a well defined standard interface: HID
(Human Interface Devices), but we have found already three ways of doing
things, requiring a rewrite of the probe and attach functionality.
Reason: It's much cheaper to present one device with a special interface
and write the driver (for Windows) for it, than to present two functions
and having to integrate a hub on the device.
You don't want to know what a ethernet/parallel/serial/hub thingie looks
like. I don't have one, so anyone that has one, could you send me the
output of the usb_dump utility avaible from
http://www.etla.net/~n_hibma/usb/usb.pl
> Likewise with parallel ports. Although turning a USB parallel port
> into a bit twiddling interface may present some interesting
> challanges.
There is at least a spec for the parallel port devices.
--
ISIS/STA, T.P.270, Joint Research Centre, 21020 Ispra, Italy
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