Re: Accessing USB ports

From: Grant Edwards (grante_at_visi.com)
Date: 01/17/05 

Date: 17 Jan 2005 21:58:56 GMT

On 2005-01-17, Larry Martell <natkelcri@yahoo.com> wrote:

>> What USB device are you using?
>
> No device.

Not an option. There has to be a device on each end of a USB
cable for anything useful to happen.

> I want to send data to another computer via USB. Is this
> doable?

For current PC USB ports there has to be a slave device on the
other end. That slave device has to act like something that
Linux knows about (e.g. serial port, network interface, mass
storage, HID). You can't connect two hosts to each other using
current USB controllers (I think there's a spec for
peer-to-peer USB, but I don't think it's escaped into the
wild).

There _are_ "host<->host" USB cables available with a lump of
electronics in the middle. That lump is essentially two
back-to-back slave devices (IIRC, the cable looks like a
network interface to both of the hosts). 

-- 
Grant Edwards                   grante             Yow!  This ASEXUAL
                                  at               PIG really BOILS
                               visi.com            my BLOOD... He's
                                                   so... so... URGENT!!

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