This post is about building bit Linux systems for Raspberry Pi boards using software from the Yocto Project. If you are interested in bit systems for the RPi4 see this post. Yocto is a set of tools for building a custom embedded Linux distribution. The systems are usually targeted for a particular application like a commercial product.
If you are looking to build a general purpose development system with access to pre-built packages, I suggest you stick with a more user-friendly distribution like Raspbian. And while the Yocto system is very powerful, it does have a substantial learning curve. You may want to look at another popular, but simpler tool for building embedded systems Buildroot. Yocto uses meta-layers to define the configuration.
Within each meta-layer are recipes, classes and configuration files that support the primary build tool, a python app called bitbake. I have created a custom meta-layer for the RPi boards called meta-rpi. The systems built from this layer use the same GPU firmware, linux kernel and include the same dtb overlays as the official Raspbian systems.
It is only the userland software that differs and that is completely configurable by you. There are a some example images in meta-rpi that support the programming languages and tools that I commonly use in my own projects.
When using this repository for customer projects, I first fork and move it to another repository, usually with a different name. I recommend you do the same if you require stability. I use the meta-rpi layer for my experiments. I am using the official Yocto meta-raspberrypi layer, but have updated recipes for the Linux kernel and gpu firmware to keep them more current.
If you want a quick look at the resulting systems, you can download some pre-built images here. All systems are setup to use a serial console. Note: There is a firewall rule that will lock out your IP for 2 minutes after 5 failed logins.
The Yocto version is 3. The 4. These are sysvinit systems using eudev. The Qt version is 5. Qt GUI applications can be run fullscreen using one of the Qt embedded linux plugins like eglfs or linuxfbboth are provided. The default is eglfs. Raspicam the command line tool for using the Raspberry Pi camera module is installed.
There is an example image that I use for a couple of Raspberry Pi music systems. For all versions of Ubuntu, you should change the default Ubuntu shell from dash to bash by running this command from a shell. The directory layout I am describing here is my preference. All of the paths to the meta-layers are configurable. If you choose something different, adjust the following instructions accordingly.
My own common meta-layer changing some upstream package defaults and adding a few custom recipes. Create a separate sub-directory for the meta-rpi repository before cloning. This is where you will be doing your customization.The guideline is not valid using the community BSP. To get the Yocto Project expected behavior in a Linux Host Machine, the packages and utilities described below must be installed.
An important consideration is the hard disk space required in the host machine. For example, when building on a machine running Ubuntu, the minimum hard disk space required is about 50 GB for the X11 backend. It is recommended that at least GB is provided, which is enough to compile any backend.
The recommended minimum Ubuntu version is Earlier versions may cause the Yocto Project build setup to fail, because it requires python versions only available starting wtih Ubuntu See The Yocto Project reference manual for more information. Note: Ubuntu To fix this comment out in local. You can go to Yocto Project Quick Start and check for the packages that must be installed for your build machine.
Essential Yocto Project host packages:. The configuration tool uses the default version of grep that is on your build machine. If there is a different version of grep in your path, it may cause builds to fail. One workaround is to rename the special version to something not containing "grep". Repo is a tool built on top of Git that makes it easier to manage projects that contain multiple repositories, which do not need to be on the same server. Repo complements very well the layered nature of the Yocto Project, making it easier for customers to add their own layers to the BSP.
Add the following line to the. Exit from the root and create a home directory For example, a directory called imx-yocto-bsp is created for the project. At this point you can use seco-setup.
Then as the script suggests choose your Seco board ram-configuration, distro, board and build-folder. Now start to bitbake. For example after:. With space scroll all therminal log anche click "y" to accept EULA conditions. Configuration is done, start to bitbake. The Yocto Project provides some images which are available on different layers.
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Poky provides some images, meta-fsl-arm and meta-fsl-demos provide others, and additional image recipes are provided in the meta-fsl-bsp-release layer. The following table lists various key images, their contents, and the layers that provide the image recipes. An image with Sato, a mobile environment and visual style for mobile devices.
The image supports X11 with a Sato theme, Pimlico applications. Not logged in Log in. MX 6 Tegra TK1 i. Helper Recent changes Help. NEWS i. Wiki tools Special pages.Act now. The Yocto Project is an open source collaboration project that provides templates, tools, and methods supporting custom Linux-based systems for embedded products, regardless of the hardware architecture.
For those of you who are wondering about the name, the term yocto is the smallest SI unit. The Yocto Project, a Linux Foundation-sponsored open source project funded by major hardware companies and operating systems vendors, provides industry-class tools, methods, and metadata for building Linux systems.
Two major components of the Yocto Project are maintained in conjunction with the OpenEmbedded project: BitBake, the build engine, and OpenEmbedded-Core, the core set of recipes used to run the build process.
These pieces are referred to as projects within the overall Yocto Project, and they include build tools, build instruction metadata called recipeslibraries, utilities, and graphical user interfaces GUIs. Poky is a reference build system for the Yocto Project. The name Poky also refers to the default Linux distribution resulting from using the reference build system, which can be extremely minimal core-image-minimal or a full Linux system with a GUI core-image-sato.
You can think of the Poky build system as a reference system for the entire project—a working example of the process in action. When you download the Yocto Project, you actually download an instance of those tools, utilities, libraries, toolchain, and metadata that you can use to build the default system, as described here.
That reference system and the reference distribution it creates are both named Poky. You can also use this as a starting point to create your own distribution, which of course you can name anything you like. One item that all build systems require is a toolchain : a compiler, assembler, linker, and other binary utilities necessary for creating binary executable files for a given architecture.
Poky uses a technique known as cross-compilation : using a toolchain on one architecture to build binary executable files for a different architecture for example, building an ARM distribution on an xbased system.
The metadata set is arranged in layerssuch that each layer can provide separate functionality to the layers beneath it.
The base layer is OpenEmbedded-Core, or oe-corewhich provides recipes, classes, and associated functions that are common and necessary for all builds. You can then customize builds by adding new layers on top of oe-core. One layer that separates the Yocto Project from OpenEmbedded is the meta-yocto layer, which provides the Poky distribution configuration and a core set of reference BSPs.
The OpenEmbedded project itself is a separate open source project with largely interchangeable recipes and similar goals to the Yocto Project, but different governance and scope. A BSP contains the essential packages and drivers necessary for building Linux for a specific board or architecture. These are often maintained by the hardware manufacturers who make the boards.
BSPs are the interface between the Linux operating system and the hardware that runs it. Note that it is also possible to create BSPs for virtual machines. BitBake is a build engine.Toaster is a web interface to the Yocto Project's OpenEmbedded build system. The interface enables you to configure and run your builds.
Information about builds is collected and stored in a database. You can use Toaster to configure and start builds on multiple remote build servers. This release of Toaster does allow you to configure and initiate builds. However, you cannot use Toaster to customize image recipes, which still must either be done by hand or through Hob. As Toaster matures, it eventually will equal and surpass Hob functionality, at which time Hob will be deprecated.
Analysis Mode: In Analysis Mode, you can record builds and statistics. In this Mode, you directly access the bitbake command, which you then use to build images.
Analysis Mode requires you to have first started Toaster and then to initiate your build using the bitbake command from the shell. Toaster must be started before the build or it will not collect build data. See what was built recipes and packages and what packages were installed into your final image. See the value of all variables in your build configuration, and which files set each value. Examine error, warning and trace messages to aid in debugging.
See information about the BitBake tasks executed and reused during your build, including those that used shared state. See dependency relationships between recipes, packages and tasks. In this mode, all your interaction with the build system happens through the web interface. You do not have direct access to the bitbake command.
Using this mode, you configure and start your builds within Toaster's GUI. Each project can be configured for a specific version of the build system. As shipped, Toaster supports Yocto Project Releases 1. Toaster has all the same capabilities in Build Mode as it does in Analysis Mode plus the following:. Browse layers listed in the various layer sources that are available in your project e. You can set Toaster up to run as a local instance or as a shared hosted service.
Regardless of how you set up Toaster, both Analysis and Build Modes are available. When Toaster is set up as a local instance, all the components reside on a single build host. Fundamentally, a local instance of Toaster is suited for a single user developing on a single build host. Toaster as a hosted service is suited for multiple users developing across several build hosts.
When Toaster is set up as a hosted service, its components can be spread across several machines:. This chapter describes how you need to prepare your system in order to use Toaster. You first need to be sure your build system is set up to run the Yocto Project. Toaster requires extra Python dependencies and daemon in order to run. A Toaster requirements file named toaster-requirements. The requirements file is located in the bitbake directory, which is located in the root directory of the Source Directory e.
The dependencies appear in a pipinstall-compatible format. It is highly recommended that you use a Python virtual environment that allows you to maintain a dedicated Python executable and its own set of installed modules.The Group moderators are responsible for maintaining their community and can address these issues.
This includes: harm to minors, violence or threats, harassment or privacy invasion, impersonation or misrepresentation, fraud or phishing. Note: Your email address is included with the abuse report. Toggle navigation. Help Log In. Home Messages Hashtags Subgroups. Search Cancel. Fred Baksik. I'm having difficulties debugging using a GUI front-end for gdb.
I didn't have these many problems with Yocto Jethro. I've followed the Development Guide instructions when building the default Poky core-image-minimal.
The debugger itself is just fine at the command line. But when trying to setup a GUI debugger I keep getting the following types of errors: warning: Unable to find dynamic linker breakpoint function. GDB will be unable to debug shared library initializers and track explicitly loaded dynamic code. Warning: Cannot insert breakpoint 1. Cannot access memory at address 0x43d10 Cannot insert breakpoint Cannot access memory at address 0x43d20 Any advice or recommendations?
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The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I do know that Yocto has a something called SATO to serve as a user interface but I couldn't find much information on it and I'm not sure how to use it develop a GUI application that can run on an Embedded Linux image created through Yocto.
Learn more. Asked 3 years, 11 months ago. Active 3 years, 11 months ago. Viewed times. I do know that Yocto has a something called SATO to serve as a user interface but I couldn't find much information on it and I'm not sure how to use it develop a GUI application that can run on an Embedded Linux image created through Yocto I'd really prefer Java but I'm open to other languages too.
Thanks in advance for any help. Rohit Rohit 10 10 bronze badges. I suggest you to use Qt Creator. Here is a wiki of one of the Yocto Project Board that have the set up wiki. Apr 25 '16 at Active Oldest Votes.
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Dark Mode Beta - help us root out low-contrast and un-converted bits. Related Welcome to the Yocto Project! The Yocto Project is an open-source collaboration project whose focus is developers of embedded Linux systems. The BitBake and OE components are combined together to form a reference build host, historically known as Poky. If you do not have a system that runs Linux and you want to give the Yocto Project a test run, you might consider using the Yocto Project Build Appliance.
The Build Appliance allows you to build and boot a custom embedded Linux image with the Yocto Project using a non-Linux development system.
See the Yocto Project Build Appliance for more information. This quick start is written so that you can quickly get a build host set up to use the Yocto Project and then build some Linux images. Rather than go into great detail about the Yocto Project and its many capabilities, this quick start provides the minimal information you need to try out the Yocto Project using a supported Linux build host.
Reading and using the quick start should result in you having a basic understanding of what the Yocto Project is and how to use some of its core components. You will also have worked through steps to produce two images: one that is suitable for emulation and one that boots on actual hardware. The examples highlight the ease with which you can use the Yocto Project to create images for multiple types of hardware.
For more detailed information on the Yocto Project, you can reference these resources:. Website: The Yocto Project Website provides the latest builds, breaking news, full development documentation, and access to a rich Yocto Project Development Community into which you can tap. While this screencast is somewhat dated, the introductory and fundamental concepts are useful for the beginner.
Provides a recent Linux kernel along with a set of system commands and libraries suitable for the embedded environment. For devices that do not have a display or where you wish to use alternative UI frameworks, these components need not be installed. Creates a focused and stable core compatible with the OpenEmbedded project with which you can easily and reliably build and develop. Provides a layer mechanism that allows you to easily extend the system, make customizations, and keep them organized.
You can use the Yocto Project to generate images for many kinds of devices. As mentioned earlier, the Yocto Project supports creation of reference images that you can boot within and emulate using QEMU.
Beyond emulation, you can use the layer mechanism to extend support to just about any platform that Linux can run on and that a toolchain can target. The following list shows what you need in order to use a Linux-based build host to use the Yocto Project to build images:. Build Host A build host with a minimum of 50 Gbytes of free disk space that is running a supported Linux distribution i.
Build Host Packages Appropriate packages installed on the build host. The Yocto Project team verifies each release against recent versions of the most popular Linux distributions that provide stable releases.
In general, if you have the current release minus one of the following distributions, you should have no problems. The OpenEmbedded build system should be able to run on any modern distribution that has the following versions for Git, tar, and Python.
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Python 2. If your build host does not meet any of these three listed version requirements, you can take steps to prepare the system so that you can still use the Yocto Project. Required build host packages vary depending on your build machine and what you want to do with the Yocto Project.
For example, if you want to build an image that can run on QEMU in graphical mode a minimal, basic build requirementthen the build host package requirements are different than if you want to build an image on a headless system or build out the Yocto Project documentation set. Collectively, the number of required packages is large if you want to be able to cover all cases.