Re: Siemens SX56

On Tue, 03 Jun 2003 20:54:45 -0600
Josh Hansen <doctorj_at_softhome.net> wrote:
> Hello,
Hi!

> This is my first post to the Familiar list! I own a Siemens SX56
> Pocket PC phone, which includes GSM cell phone service provided by
> AT&T wireless. Its hardware is basically the same as an iPAQ - it has
> a StrongARM 206 MHz CPU, 32MB RAM, 32MB ROM, and [sigh] Pocket PC 2002
>
> Phone Edition OS. It has a slot for SD/MMC memory cards, too. My goal

Oh oh... this does not say much about the really crucial internals.
Look at the 3870 iPaq. The obvious specs are almost the same as the 36xx
and 37xx but you would never be able to get the same kernel running
there since the 38xx own a special ASIC doing lots of important stuff.
Though I would like to believe it's that easy I fear it isn't :(

> is to get Linux and hopefully an environment like Opie running on this
> device.
> So far, I have patched /usr/src/linux/drivers/usb/serial/ipaq.h
> and
> .c to support the Siemens device over USB. I have been able to
> establish some sort of connection with the device using the SynCE
> tools. From all indications, it looks like it will be simple to
> actually get Familiar running on the SX56. However, I am wondering if

Still a long way to go.
First problem is getting a decent bootloader to run.

> there is any available software to utilize the cell phone
> functionality of the device? So far, I haven't been able to find any
> information on the particular circuitry involved in the phone
> capabilities, so maybe it will have to be reverse engineered... unless
> this has already been done for a similar handheld? I hope to get the
> phone features working because otherwise, there is no point in having
> a cell phone built into my PDA.
> Any ideas?

The GSM/cellphone part is mostly attached using one of the StrongARM
UARTs and are pretty straight forward GSM/cellphone modem devices which
can be controlled using AT commands.

> Thanks!
> - Josh Hansen
CU
  nils faerber

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