TS-4900 - Build Yocto Distribution

Recommended reading

• Yocto Documentation
• Yocto quick start guide
• Freescale Yocto instructions

Build Yocto

To get started, install repo. This is a tool for downloading and updating a set of git repositories.

mkdir ~/bin
curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
chmod a+x ~/bin/repo
export PATH=${PATH}:~/bin

Check out our BSP:

mkdir ts-bsp
cd ts-bsp
repo init -u https://github.com/embeddedarm/ts-oe-bsp.git -b dizzy
repo sync # This will take a while while it downloads around 10 git repos

Once it is downloaded the environment needs to bet set up:

## The SDK will default to the architecture of the build system
## or you can override it with one of the following:
#export SDKMACHINE="x86_64"
#export SDKMACHINE="i686"
# Generate the image based on quad or solo
#export MACHINE="ts4900-quad"
#export MACHINE="ts4900-solo"
## The SDK and MACHINE can be changed later by modifying build/conf/local.conf

source ./setup-environment build

#Install our BB layers file.  This includes a set of common layers used
#in our images.
cp ../.repo/manifests/bblayers.conf conf/bblayers.conf

Edit the file conf/local.conf. To build our default distribution, change

 DISTRO ?= 'poky'

to

 DISTRO ?= 'poky-systemd'

Also to match our image add these options to the QT build and whitelist commercial licenses for the gstreamer playback.

 PACKAGECONFIG_append_pn-qtbase = " icu accessibility"
 LICENSE_FLAGS_WHITELIST = "commercial_libav commercial"

You will need to select which image to build. Our default image is ts-x11-image. You can view the images we provide with:

ls -l ../sources/meta-ts/recipes-*/images/*

These images may change in the future, or more may be added. There are descriptions in the top comments of each file.

1. Build our common image with X11/QT support

bitbake ts-x11-image

1. Alternatively, this is a smaller image with X11/QT omitted
2. bitbake ts-headless-image

After the build has finished, it will be available in

# for the quad build
cd tmp/deploy/images/ts4900-quad
# for the solo build
cd tmp/deploy/images/ts4900-solo

Use gparted or fdisk+mkfs to format an SD card with a single partition.

From your pc, mount the SD card. Assuming /dev/sdc is the SD card

mkdir /mnt/sd
sudo mount /dev/sdc1 /mnt/sd
sudo mkfs.ext4 /dev/sdc1
sudo tar -xf ts-x11-image-ts4900-quad.tar.bz2 -C /mnt/sd
sudo umount /mnt/sd/
sync

Updating the distribution

Occasionally we will make updates to Yocto. To pull these down:

export PATH=${PATH}:~/bin
cd ts-bsp
repo sync

source ./setup-environment build

From here, you can bitbake your desired image which will include any updates.