RE: Embedded gPhoto

1. Like someone else said earlier, you need to have the board up and running
and you need to have Linux working on your board.
2. You need a standard usb host driver that fit in the linux usb host stack.
Or libusb won't work.
3. You need to have a toolchain setup to target your board.
4. Playing some ./configure tricks (setting up the right environment and
argument) to configure libusb and libgphoto2.

That is pretty much it.  In my case, I had to patch the libgphoto2/Makefile
and libgphoto2_port/Makefile.  This is because I am using the --prefix when
I do the ./configure to allow me to do make install later on.  

Without my patch, everything install fine but app linked against libgphoto2
won't work.  That is because the configure builds Makefile and create a
define passed in the code (used to load the ports and camlib at runtime) and
the defines are build as "-D${libdir}/foo".   And libdir is created based on
the --prefix value.

So in my case I am doing --prefix=/mnt/myboardfs.  So the code at runtime
tries to open /mnt/myboardfs/lib/gphoto2/...  Which of course when I run on
the board is /lib/gphoto2.  So I created patch files to patch the makefiles
right after I do ./configure to replace ${libdir} with /lib.

This is probably the wrong way to do it but it works!

Pat

-----Original Message-----
From: gphoto-devel-admin@xxxxxxxxxxxxxxxxxxxxx
[mailto:gphoto-devel-admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Richard
Taylor
Sent: Saturday, February 18, 2006 5:35 AM
To: gphoto-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: RE: [gphoto-devel] Embedded gPhoto

I'm using an Atmel AVR Mega32 at the moment which I think is RISC
architecture. I note from http://www.open-research.org.uk/ARMuC/ that the
Atmel AT91xx series use ARM. 

Could you tell me a little more about how you are running libgphoto on an
Arm processor and what is involved to get the thing up and running?

Richard

-----Original Message-----
From: gphoto-devel-admin@xxxxxxxxxxxxxxxxxxxxx
[mailto:gphoto-devel-admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Patrick
Laplante
Sent: 17 February 2006 18:45
To: 'Dan Fandrich'; gphoto-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: RE: [gphoto-devel] Embedded gPhoto

Yeah Pic would be painful!!

I have libgphoto running on an Arm processor right now... Works like a
charm! 

-----Original Message-----
From: gphoto-devel-admin@xxxxxxxxxxxxxxxxxxxxx
[mailto:gphoto-devel-admin@xxxxxxxxxxxxxxxxxxxxx] On Behalf Of Dan Fandrich
Sent: Friday, February 17, 2006 1:13 PM
To: gphoto-devel@xxxxxxxxxxxxxxxxxxxxx
Subject: Re: [gphoto-devel] Embedded gPhoto

On Fri, Feb 17, 2006 at 03:24:05PM -0000, Richard Taylor wrote:
> Is it possible to use a microcontroller to run basic camera control
commands
> over USB?  Initially I would like to be able to set ISO speed with 
> Canon
and
> Nikon DSLRs.

When you say "microcontroller" are you talking about something like an ARM
or something like a PIC?  The answer is yes to the former, but if you manage
the latter, you'll probably get yourself a front-page story on Slashdot.

>>> Dan
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