This BSP has been built against revision 8639a836d388812887ecd28bd4e7c66a7763ee8e of meta-intel and the Yocto Project 1.1.1 release.
This README file contains information on building the meta-cedartrail BSP layer, and booting the images contained in the /binary directory. Please see the corresponding sections below for details.
Without modification, the pre-built images contain a 10-day timer. If you boot the pre-built images on target hardware, the hardware will automatically reboot after 10 days at which time the timer will reset itself to another 10-day period. To disable this timer, you must rebuild the BSP image using the Yocto Project
The 'Cedar Trail' platform consists of the Cedarview (Intel® Atom™ N2600, N2800 and D2700) processor, plus the Tiger Point (Intel® NM10 Express) Chipset.
Table of Contents
- Building the meta-cedartrail BSP layer
- Booting the images in /binary
- Miscellaneous Notes
1. 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 of the Yocto Project website.
Having done that, and assuming you extracted the BSP tarball contents at the top-level of your yocto build tree, you can build a cedartrail image by adding the location of the meta-cedartrail layer to bblayers.conf e.g.:
The meta-cedartrail layer contains support for two different machine configurations. These configurations are identical except for the fact that the one prefixed with 'cedartrail' makes use of Intel' proprietary PowerVR Graphics/Media drivers to enable Graphics and Media acceleration in the processor, while the one prefixed with 'cedartrail-nonopvr' uses non-accelerated graphics driver (VESA).
If you want to enable the layer that supports Power VR graphics add the following to the local.conf file:
MACHINE ?= "cedartrail"
Power VR Graphics user-space driver binaries are covered by a "Intel Free Distribution Binary License". The build of this driver can be enabled by adding the following line to the local.conf file:
PVR_LICENSE = "yes"
If you want to enable the layer that does not support Power VR graphics add the following to the local.conf file:
MACHINE ?= "cedartrail-nopvr"
You should then be able to build a cedartrail image as such:
$ 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. Instead of extracting a BSP tarball at the top level of your yocto build tree, you can equivalently check out the appropriate branch from the meta-intel repository at the same location.
2. 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-20111209003350.hddimg of=/dev/sdf
# eject /dev/sdf
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: and you should be in.
If you find you're getting 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
3. Miscellaneous Notes
Video and Music Samples
This BSP includes recipes to download Ogg format video and music files that can be played-back with the Video and music players included in the sato images. The sample files are installed in /home/Music and /home/Videos directories.
Adding Glxgears to image
Glxgears can be added to the generated image by adding "tools-testapps" option to the extra image features variable in the default local.conf before building the BSP.
e.g. to add Glxgears, locate the following line in local.conf:
EXTRA_IMAGE_FEATURES = "debug-tweaks"
and change it line to the following:
EXTRA_IMAGE_FEATURES = "debug-tweaks tools-testapps"