Building the Yocto BSP (DIVELK)
|As the DIVELK kit is based on Yocto, the implementation of the MVM follows the approach described here. As such, the reading of this section is highly recommended.|
|Jun 2017||DIVELK 3.0.0|
|4.0.0||Apr 2018||DIVELK 4.0.0|
|Repository||BSP Manifest||Yocto BSP Layer|
|divelk-image-devel||minimal for development/debugging image|
|divelk-image-matrix||based on TI matrix GUI rfs|
This is a quickstart guide to build Yocto BSP for DIVA SOM, to rebuild the binaries (U-Boot, Linux kernel, root file system) provided with the DIVELK releases.
For more information regarding the Yocto build system, go to its dedicated category page
Build system prerequisites
DIVELK MVM is already configured to build this Yocto version/configuration, however, users typically don't use a VirtualBox VM for Yocto builds for performance reasons.
You can refer to Yocto manual setup section for a list of supported Linux distribution and their configuration to create your own build environment on your favorite distribution.
Building the DIVELK Yocto BSP
To build DIVELK BSP first you need to download Linaro toolchain from
install it and add it to the PATH.
Initialize the build environment
DIVELK Yocto BSP uses git-repo tool to fetch all the required git repositories to build
dvdk@vagrant-ubuntu-trusty-64:~/diva$ curl http://commondatastorage.googleapis.com/git-repo-downloads/repo > repo dvdk@vagrant-ubuntu-trusty-64:~/diva$ chmod a+x repo dvdk@vagrant-ubuntu-trusty-64:~/diva$ ./repo init -u email@example.com:diva/diva-bsp.git -b diva-morty dvdk@vagrant-ubuntu-trusty-64:~/diva$ ./repo sync
Build the Yocto BSP image
Please note that even the basic root file system requires a few hours to build on a mid/hi range desktop (4-6 cores, 8-12 GiB RAM) also depending on your Internet connection speed (all sources are fetched from the network). Nearly 20GiB of disk space is required for the build. Moreover, building inside the DVDK adds some overhead, since the performances of a virtual machine are reduced if compared to the physical hardware. Thus, it's recommended to check the hardware capabilities of the host system and, when building with Yocto is required, developers should consider the following options:
- migrating the build system to a physical machine
- assuming that the host system has the required resources, extending the hardware capabilities of the default DVDK (eg: adding more cores and disk space)
Once completed the initialization phase, developers can launch the Yocto image build process with the following commands:
dvdk@vagrant-ubuntu-trusty-64:~/diva$ source diva-bsp-init-env.sh dvdk@vagrant-ubuntu-trusty-64:~/diva/build$ bitbake divelk-image-matrix
The resulting files (kernel, devicetree and u-boot binaries, plus .tar.gz root file system) will then be available inside build/tmp/deploy/images/diva.
To build an SDK that can be used with Eclipe Yocto ADT, use a image based SDK, e.g.:
dvdk@vagrant-ubuntu-trusty-64:~/diva/build$ bitbake -c populate_sdk divelk-image-devel
Build the QT5 image
divelk-image-matrix target already generate a proper RFS with QT5 libraries and examples, based on Weston backend.
On the other side, to build an SDK that can be used with QT Creator to build QT5 applications, use the following target instead of
dvdk@vagrant-ubuntu-trusty-64:~/diva/build$ bitbake meta-toolchain-arago-tisdk
divelk-image-devel: a small image with some useful development and debugging tools divelk-image-networking: based on divelk-image-devel, add lots of networking tools
Build additional packages
To build additional packages the user must first enter the directory where the
diva-bsp-init-env.sh is placed and source it
And then can run any of the bitbake command.