Maybe he can use "Direct-Cable-Connection" that comes with Windows,
see ADD/REMOVE WINDOWS COMPONENTS.

KF4HAZ - Lonnie

----- From: "William Chops Westfield" <westfw@
> 
> On Nov 1, 2004, at 7:19 AM, omar kfitz wrote:
> > omar touhami
> > Senior student at Alakhawayn University of Ifrane
> 
> > I have to design an application to transfer files between two computers
> > using their usb ports.
> 
> Ok.  Senior Design project for school or similar?
> 
> > I also need to fabricate the cable USB to USB that will allow me to
> > link the two computers.
> 
> Hmm.  As you've discovered, and as numerous people have mentioned 
> (without
> reading the rest of your message), this is a relatively complex issue.
> There are cheap commercial "host to host file transfer USB cables" that
> do this, but that's no help if your "duty" is to design one.  I have no
> idea how they work.  Presumably, most contain a bit of silicon that does
> almost all of the work, such as the M5632 from Ali:
> 
>      http://www.usb.org/app/search/products/p/40370119/info
>      http://www.ali.com.tw/eng/products/product_detail.php?pserno=51
> 
> It looks pretty simple, conceptually; some buffers that are writable by
> one host and readable by the other.  Designing the same thing out of
> general purpose usb-capable microcontrollers would be considerably
> less simple, IMO.  USB.ORG is probably your friend here; a bit of
> searching should turn up a manufacturer who has good online 
> documentation,
> and perhaps one who would be willing to send you a sample.
> 
> > I'm not much of an electrical engineer!
> 
> It seems to me that if you're not an EE sort of person, designing and
> fabricating the interconnect cable should not be your job, unless 
> perhaps
> "fabricate" is a poor translation from your native language.  No matter
> how you look at it, this would be an EE sort of job (IMO.)  If you just
> have to FIND the appropriate cable, that's much easier...
> 
> Can you be more specific about what part of this application you 
> actually
> need to do?  (obviously, for instance, you're not expecting to write
> complete operating systems for each computer ;-)
> 
> BillW
> 
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