How to grow and scale the project?

Sébastien Lorquet squalyl at
Mon Apr 19 15:02:15 UTC 2010


just to let the list know that the sim project is not dead, but just like
you I have other (paid) works to complete before. I'm working on it with
feedback and testing from Dieter. We're not so far from having something
functional for osmocombb. I should have posted an update before, and of
course I'll announce when it's complete^W openly publishable.

Let me say that anyone with javacard skills, or willing to develop such
skills, is welcome. my code is not in oscombb git yet, but is still
available to anyone asking from svn.

Knowning that we're building the world's first free software GSM stack is a
good motivation for me, and I'm glad to help where I can.


On Mon, Apr 19, 2010 at 4:35 PM, Harald Welte <laforge at> wrote:

> Hi!
> As you can see, there is not really that much progress throughout the last
> 2
> weeks or so.  Dieter and myself were the only two who actually looked at
> how
> to driver the DSP, TPU and RF hardware, write the drivers for it and the
> existing layer1 code.  Now we're both busy with other (paid) work, and
> the project almost seems stuck.
> I would like to see this change.  I'm quite sure there are some other folks
> on this list who would be interested in diving in those lower layer bits
> of the system.  However, I also understand there is not all too much that
> can be done without running your own non-hopping BTS (as we don't do
> frequency
> hopping at the moment).  So a working OpenBTS, OpenBSC setup or something
> like a CMD55 or Racal 6103 are a precondition.
> Nonetheless, a number of people on this list have access to those devices.
> I'd like to encourage some other people to also look at this and remove the
> dependence on Dieter and myself in that area.
> Furthermore, members of the IRC channel have certainly noticed the growing
> interest in a potential port to the Mediatek chipset based devicees.
>  Mediatek
> is churning out more than 95 million chipsets every quarter, so there is
> plenty
> of phones around.
> The data sheets, reference schematics and other training materials can
> easily
> be found on a lot of chinese developer websites - as is the Mediatek SDK.
> However, the critical layer1 and DSP API part is only provided in object
> code,
> and the documentation does not document it.
> Still I believe it is feasible.  So if you want to stay out of the GSM
> part,
> feel like the Calypso is too boring for you: Why not work on getting a
> minimal
> custom software image for the MT622x running, including bootloader support,
> keypad/touchscreen and graphics output?  If that is done by the wider
> community, the so-called experts can focus on looking at the GSM side of
> things
> once they have time.
> Even on the Calypso there are many tasks that still need to be finished,
> including battery charging, power management, file system, SIM Card API,
> etc.
> If you know somebody who understands C development for microcontrollers and
> wants to help building the worlds first Free Software GSM baseband chipset
> software, please motivate them to join.  We can really need every helping
> hand
> we get.
> Happy hacking,
>        Harald
> --
> - Harald Welte <laforge at>
> ============================================================================
> "Privacy in residential applications is a desirable marketing option."
>                                                  (ETSI EN 300 175-7 Ch. A6)
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