[yocto] can one lay hands on a galileo-based dev kit?

[Paul Eggleton]

On Tuesday 13 May 2014 15:33:33 Alex J Lennon wrote:
> On 13/05/2014 14:56, Robert P. J. Day wrote:
> > On Tue, 29 Apr 2014, Alex J Lennon wrote:
> >> On 29/04/2014 17:34, Robert P. J. Day wrote:
> >>>   i've just been asked to design a linux device drivers course based
> >>> 
> >>> on the arduino-compatible intel galileo processor, so my first TODO
> >>> item is to lay hands on a galileo-based dev kit, for which this looks
> >>> like the obvious choice:
> >>> 
> >>> https://software.intel.com/en-us/iotdevkit
> >>> 
> >>> but that page says "upcoming". does it exist? my normal go-to source
> >>> up here, digikey.ca, shows zero in stock. where can i lay hands on
> >>> one (if possible)? thanks.
> >> 
> >> If it helps I had a Galileo Dev Kit delivered from RS (UK) a couple of
> >> days ago.
> >> 
> >> http://uk.rs-online.com/web/p/processor-microcontroller-development-kits/
> >> 7919611/
> >> 
> >> (I'm actually a bit confused about how the Galileo IoT collection of
> >> meta-foo layers relates to the primary meta-foo
> >> 
> >>  sources, as I can't seem to find an independent meta-clanton ;ayer
> >> 
> >> which I guess I'd need. Early days yet, but am planning
> >> 
> >>  on working through this as soon as I get some time as I want to test a
> >> 
> >> build with meta-moo support on Galileo)
> >> 
> >   i finally have time to play with this, and am interested in using
> > 
> > yocto to build a bootable system for the galileo. i see that there is
> > a version "1.0.0" of the firmware for this board -- is there a
> > convenient yocto recipe that involves just downloading the layer info
> > and not what looks like the current entire tarball that's stuffed with
> > all the sources?
> > 
> >   i suspect that, within a day or two, i'll figure that out once i
> > 
> > start digging around. if it's already documented somewhere, that would
> > be even better. :-)
> 
> Still a bit up in the air with this here Robert.
> 
> I've not been able to work out if there's a primary source for
> meta-clanton independent
> of the packaged iot layer, so I grabbed meta-intel-iot-devkit in its
> entirety from
>  git://git.yoctoproject.org/meta-intel-iot-devkit
> 
> I built one of my own custom mono images based on core-image-sato
> thinking I could
> put that on a uSD and it would "just boot" (oh the optimism... :)
> 
> No joy there so I took a quick look through that Quark BSP guide and it
> seemed to be
> talking about booting some odd kind of image format from a file on uSD.
> 
> I stepped back and had it build the iot-devkit-image which seemed to
> need be to make a
> change to an image dependency on python to python-core.
> 
> That's where I had to leave it as I ran out of time. I was planning on
> hooking up serial to the
> Tx/Rx pins to see if anything is happening there, getting something
> building, then replacing
> the meta-intel-iot-devkit references in BBLAYERS (aside from
> meta-clanton) with the daisy
> layers I'm using on a day to day basis.

So apologies for not replying earlier - I've not been directly involved in the
BSP for Galileo, but I have been providing support for the team doing the IoT
DevKit work. You should be able to build images for Galileo using what's in
meta-intel-iot-devkit directly; you could also use the layers within it
separately using your own separate OE-Core / Poky tree, but it's not really
designed to be used in that way. If you really want to do it separately you
should take care to use all three layers (meta-clanton-bsp, meta-galileo, and
meta-iot-devkit) and set your DISTRO = "iot-devkit".

FYI as of yesterday there is also now a "devkit-daisy" branch which is
updated on top of the daisy branch, but it is a work-in-progress at the
moment so don't be too surprised if something breaks (although it did work
well for me here).

To create a partitioned image file suitable for dd'ing to an SD card, the
easiest way is to use the wic tool - for example, to build a final image 
from an image called "iot-devkit-image" that you just built using the build
system:

  wic create iot-devkit -e iot-devkit-image

("iot-devkit" here points to scripts/lib/image/canned-wks/iot-devkit.wks which
tells wic how to format the image).

I'd recommend you then use the ddimage helper script that we have since it
provides a measure of assurance that you've got the right device before
overwriting its contents, for example:

  sudo ../scripts/contrib/ddimage /var/tmp/wic/build/iot-devkit-NNNNN-mmcblkp0.direct /dev/mmcblk0

Cheers,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre