[maemo-users] [maemo-users] Wired keyboard and N800

From: Luca Donaggio donaggio at gmail.com
Date: Wed Jan 31 19:19:48 EET 2007
2007/1/31, Jon Smirl <jonsmirl at gmail.com>:
> On 1/31/07, Luca Donaggio <donaggio at gmail.com> wrote:
> > Does anybody tried to use a USB keyboard (attached to a modified USB hub
> for
> > power injection, of course) with the N800 in USB host mode?
> > It doesn't work for me, keybord led doesn't even light up!
> There is no power supplied to the USB port. The only way to make it
> work is to plug a powered hub into the port and then plug the keyboard
> into the hub.
> I consider this a significant design flaw in the N800/770. It would
> really be nice if there was a small amount of power supplied to the
> USB port, just enough to run a keyboard or memory stick. Less than
> 100ma at 5V. Sure it will draw the batteries down but that is the
> price you pay. If you have the N800/770 on wall power the USB port
> should supply power all of the time.
> No power is also tied up in implementing the kernel USB OTG driver for
> the device. The spec says you can't advertise OTG support if the port
> has no power.
> --
> Jon Smirl
> jonsmirl at gmail.com

That's exactly what I've done: I modified a powered hub to inject power to
the N800 too. It used to work on the 770, but not on the N800, so maybe
there's something else involved which I'm not aware of.

Luca Donaggio
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