[maemo-developers] USB host mode on N800

From: Sebastian Mancke asteban at gmx.de
Date: Fri Nov 23 17:02:50 EET 2007
Hi Dave,

Dave Sullivan schrieb:
> On Friday 23 November 2007 4:20:00 am Sebastian Mancke wrote:
>> Hi.
>> Kees Jongenburger schrieb:
>>> On Nov 22, 2007 5:58 PM, Dave Sullivan <dave at dave-sullivan.com> wrote:
>>>> Hey All,
>>>> I've got the modified kernel image for usb host mode, but before I go
>>>> ahead and try it, what kind of cable hacking is sufficient? I'd assume I
>>>> could just purchase a USB extension cord (A-type to A-type recepticle),
>>>> hack off the A-type and stick on a micro-USB connector.. but doesn't it
>>>> require external power?
>>> Hi
>>> I have measured the vbus voltage and it was only  about 3 volt a
>>> opposed to what would be required (5 volt) (there is no active voltage
>>> pump).
>>> I guess you will often need an external power(if possible just buy
>>> yourself a usb gender changer
>>> and plug the tablet into a powerd hub).
>>> While the patches are available is have not hear of anybody getting
>>> the n800 to work in usb-host mode.
>>> can somebody confirm a working usb-host on n800 or n810 perhaps?
>> We are using the n800 usb-host mode in a productive project.
>> It works absolutely reliable. Smaller devices like an USB Keyboard or
>> the Silabs USB Serial converter (CP2102) can be used without additional
>> power supply. For bigger devices (external hard disc, USB-Network
>> adapter) you have to use a powered USB hub, of course.
>> Regards,
>>   Sebastian
>>> greetings
>>> _______________________________________________
>>> maemo-developers mailing list
>>> maemo-developers at maemo.org
>>> https://lists.maemo.org/mailman/listinfo/maemo-developers
> I have a Nokia cell phone without bluetooth, but I also have a USB cable for 
> it. When plugged into a Linux box, it can work as a modem. I was hoping to 
> try and get this functionality working on the n800... I'd assume it'll take 
> some hacking. So to confirm.. 
Should work.
Maybe you have to enable the specific kernel modules needed for you
modem in the kernel configuration.

> I can use the cable that comes with the n800 
> (USB-A to USB mini-A) and attach a USB-A gender changer to it?
Yes. But these USB gender changer are somewhat rare.

> One more question... where/how would I get the stock kernel so that I can 
> re-flash it if the usbhost kernel messes anything up?
The original fiasco image contains the kernel. You can unpack it and
flash the kernel.


> Thanks!

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