Re: [iPAQ] more iPAQ questions

George France wrote:

> Hello Joshua;
>
> >
> > How does the PC Card expansion pack work with Linux? Can I
> > use the same
> > cards that are supported by Linux presently with the iPAQ? like SCSI,
> > Ethernet, mass storage?
>
> I have used the Socket CF Ethernet driver and the CF IBM Micro drive in my
> iPAQ without any problems.
>
> >
> > How is the power management?
> >
>
> We have not done any power management work except for the screen saver.
> After we are certain that all the low level drivers work, then we will work
> on the power management issues, unless somebody else does it first. :-)
>
> > Does the light sensor that controls the iPAQ's contrast work
> > or do you need
> > to develop special software?
>
> The light sensor does work but we have not done anything with it in Linux.
> If you would like to write an interface for the light sensor the specs are
> at http://www.handhelds.org/Compaq/iPAQH3600/iPAQ_H3600.html

From memory this spec does not address the s/w issues.

The hooks for a sensor are in place but presently not connected. It should only
take a few hours If nobody else beats me to it I should get around to it soon.

For anybody interested the sensor is a response to a command. This command is
formatted exactly like the backlight commands . The source for which is found
at:

http://www.handhelds.org/cgi-bin/viewcvs.cgi/apps/h3600_test/bl.c

Once the hook is in place you will be able to read the light sensor data using
the back light command.
To do this you set the mode parameter to 3, issue the command and you will get
a single byte returned.
This byte ( I assume ) is the light sensor data (0-255) which you can use to
control the back light. I havn't tested it works yet though!.

You will need the modified ts driver installed (h3650_ts.c).

>
>
> >
> > Can you use different windows managers than those in the
> > pics, like KDE?
>
> In theory yes, but I do not believe that anybody has tried.
>
> >
> > Can you presently have a boot loader in main memory and the
> > filesystem on a
> > 64 MB CF disk and run Linux with a boot option and keep winCE
> > on the main
> > memory? how would you accomplish something like that?
>
> I would look at the www.linuxce.org site. They have done similar things with
> other PDA's.
>
> I hope this helps.
>
> Best Regards,
>
> --George
>
> George France, france@crl.dec.com
> Cambridge Research Laboratory, Compaq Computer Corporation
> One Cambridgecenter MS: CRL
> Cambridge, MA 02142 USA
>
>
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Received on Wed Aug 16 17:43:03 2000