3G dongle connected to N900?

On Monday 08 March 2010 15:17:23 Matan Ziv-Av wrote:
> On Mon, 8 Mar 2010, Xavier Bestel wrote:
> > So basically the Euro spec forbids host mode on phones.
>
> No, that is a myth. The facts are:
[useful info about the MoU removed]

Unfortunately commercial considerations mean that any phone which does not
support micro USB charging, without some extra dongle to carry around, will
suffer in the marketplace. The MoU is a way to get around anti-trust issues
and allow the manufacturers to offer what the users want: everything charging
from the same charger.

If micro USB charging really does conflict with host mode then we won't see
host mode on any device: it is as simple as that. Does anyone else have any
info on whether host mode can be supported along with microUSB charging?

Graham

>________________________________________
>From: maemo-users-bounces@maemo.org [maemo-users-bounces@maemo.org] On Behalf Of ext Xavier Bestel [xavier.bestel@free.fr]
>Sent: Monday, March 08, 2010 4:38 PM
>To: Klaus Rotter
>Cc: maemo-users@maemo.org
>Subject: Re: 3G dongle connected to N900?
>
>On Mon, 2010-03-08 at 10:31 +0100, Klaus Rotter wrote:
>> Am 07.03.2010 02:07, schrieb Peter Flynn:
>> > Jan Knutar wrote:
>> >> N900 does not have USB Host Mode, so no.
>> >
>> > You're kidding? Did they not learn from the N800 at all?
>>
>> The problem is to use the USB port as a plug in for the charger/ac
>> adapter. On the N8x0, there was a separate input for the charger. All
>> new cellular phones in the EU must have a micro USB port as a connector
>> for an ac adapter (in the future). There are some problems to use the
>> USB port both as power input and also power output (required in host
>> mode). And yes, I really want a USB host mode, too.

Some problems don't mean impossible. It may not be possible within specs with
integrated circuits used in N900 but it does not maen that it can't be never done

>IIRC it's forbidden by the USB spec. Also the spec says you can't have
>OTG and more than one USB connector.
>
>So basically the Euro spec forbids host mode on phones.

Not absolutely, it may be difficult but not impossible.

Kate

Am 08.03.2010 19:26, schrieb kate.alhola@nokia.com:
> Some problems don't mean impossible. It may not be possible within specs with
> integrated circuits used in N900 but it does not maen that it can't be never done
[...]
> Not absolutely, it may be difficult but not impossible.

So this problem belongs to TI, as the USB feature is integrated in the
OMAP 34xx chip. Which means, _maybe_ new chips could solve it. And maybe
a new device. Unfortunatly, Bluetooth isn't a solution for everything.
Anyone heard of a BT MIDI interface? Sometimes a USB-RS232 cable would
be nice (I'm doing some kind of embedded development. I haven't tried a
BT serial soultion yet).

--
Klaus Rotter * klaus at rotters dot de * www.rotters.de