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

From: Jon Smirl jonsmirl at gmail.com
Date: Wed Jan 31 19:03:11 EET 2007
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

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