These Release Notes contain information on building the meta-cedartrail BSP layer, and booting the images contained in the /binary directory.
The 'Cedar Trail' platform consists of the Intel® Atom™ N2600, N2800 and D2700 processors, plus the Intel® NM10 Express Chipset.
Building the meta-cedartrail BSP Layer
In order to build an image with BSP support for a given release, you need to download the corresponding BSP tarball from the Board Support Package (BSP) Downloads page.
Having done that, and assuming you extracted the BSP tarball contents at the top level of your build tree, you can build a Cedartrail image by adding the location of the meta-cedartrail layer to bblayers.conf as follows:
To enable the cedartrail layer, add the cedartrail MACHINE to local.conf:
MACHINE ?= "cedartrail"
You should then be able to build an Cedartrail image with the following commands:
$ source oe-init-build-env
$ bitbake core-image-sato
At the end of a successful build, you should have a live image that you can boot from a USB flash drive (see instructions on how to do that below, in the section Booting the images from /binary).
As an alternative to downloading the BSP tarball, you can also work directly from the meta-intel git repository. For each BSP in the meta-intel repository, there are multiple branches, one corresponding to each major release starting with 'laverne' (0.90), in addition to the latest code which tracks the current master (note that not all BSPs are present in every release). Instead of extracting a BSP tarball at the top level of your build tree, you can equivalently check out the appropriate branch from the meta-intel repository at the same location.
Booting the Images in /binary
This BSP contains bootable live images, which can be used to directly boot Yocto off of a USB flash drive.
Under Linux, insert a USB flash drive. Assuming the USB flash drive takes device /dev/sdf, use dd to copy the live image to it. For example:
# dd if=core-image-sato-cedartrail-20101207053738.hddimg of=/dev/sdf
# eject /dev/sdf
This should give you a bootable USB flash device. Insert the device into a bootable USB socket on the target, and power on. This should result in a system booted to the Sato graphical desktop.
If you want a terminal, use the arrows at the top of the UI to move to different pages of available applications, one of which is named 'Terminal'. Clicking that should give you a root terminal.
If you want to ssh into the system, you can use the root terminal to ifconfig the IP address and use that to ssh in. The root password is empty, so to log in type 'root' for the user name and hit 'Enter' at the Password prompt.
If you find corrupt images on the USB (it doesn't show the syslinux boot: prompt, or the boot: prompt contains strange characters), try doing this first:
# dd if=/dev/zero of=/dev/sdf bs=1M count=512