Address the WM8753 directly

[Al Johnson]

On Thursday 11 November 2010, Ed Kapitein wrote:
> On Wed, 2010-11-10 at 12:57 -0800, W. B. Kranendonk wrote:
> > --- On Wed, 11/10/10, Al Johnson <openmoko at mazikeen.demon.co.uk> wrote:
> > > From: Al Johnson <openmoko at mazikeen.demon.co.uk>
> > > 
> > > > The ultimate goal is to make a FR to FR modem
> > > 
> > > conection, using the GSM
> > > 
> > > > voice band.
> > > 
> > > Why? Is this just to see whether it's possible, or how bad
> > > the voice channel
> > > is as a data connection when compared to the data channel?
> > 
> > I can imagine using such a solution on a flatfee subscribtion that does
> > not include data traffic. Just don't tell me you want to use the
> > resulting connection for VoIP :-P
> > 
> > Boudewijn
> > 
> > 
> > 
> > 
> > _______________________________________________
> > Openmoko community mailing list
> > community at lists.openmoko.org
> > http://lists.openmoko.org/mailman/listinfo/community
> 
> Hi all,
> 
> Yes, i would like to see if it is possible and refresh my C programming
> skills.

As good a reason as any :-)

> It is indeed a flat fee voice subscription, data would cost extra.
> VOIP is not what i had in mind ;-)

You've probably checked this, but just in case...On many subscriptions GSM 
data calls are treated the same as voice calls, not like GPRS or 3G data 
connections. It's like using an analogue or ISDN modem, circuit switched to a 
phone number just like a voice call, but carrying arbitrary data rather than 
encoded voice.

> But i think i can use it to send GPS data from one FR to another.
> Or use it for a commandline connection.

That sounds plausible, going back to ancient bit rates. Good luck - you'll be 
an expert in the workings of voice codecs by the end of this!