Interested in learning a little about embedded Linux? Have you worked with Xilinx FPGAs and want to explore some of the software related to their implementation? If you answered yes, then welcome! If you answered no to at least the first question then you should read through anyway, because this is pretty cool stuff. This GSG will be using the For some more info on MicroBlaze, check out this guide.
This guide will walk you through the steps of initial setup for PetaLinux on your Linux machine and the implementation of a pre-built design on the Zybo. By the end of this Instructable, you will be able to begin tinkering with the design from either the hardware description language HDL side, or create custom applications you can run within the Linux system running on your board.
Lets get started! Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. You will need to download the installer for PetaLinux of the same version as the Vivado and SDK installation you should have on your system.
Meaning if you have Vivado and SDK The download may take a while. Once the download has completed, make a directory in which you would like the PetaLinux tools to be installed in. From your terminal, change directory cd into the directory the installer was downloaded into likely Downloads and run the installer with a specified path to the directory you just created.
In your terminal, change directory cd into the directory the installer was downloaded into likely Downloads and run the installer with a specified path to the directory you just created. Starting from your home directory, enter the following commands also in screenshot above. This is just one option of installation location. You can install PetaLinux into any typical directory and it will work fine, as long as you have the tools sourced correctly, which we will cover.
As with many software development tools, there are a variety of dependencies that you will need to have in order for PetaLinux to operate. Many of the packages may already be installed on your computer, but some may not.
A full list of the dependencies is included below for Ubuntu. PetaLinux operates using dependencies on bit libraries, so including those specific libraries indicated is required in order for it to operate correctly even if some may seem redundant. In addition, PetaLinux can utilize a tftp server to streamline the development process, but it is not a requirement for it to function. The specified server package to use is tftpd, however I used tftpd-hpa and would suggest you do the same.
If you are unfamiliar with the process of setting it up, you can take a look at this quick Instructable. Downloading these is the same as any other module that you can get through apt-get, but when you make the following function call or see image above you can simply enter each module's name in the same line with spaces between.
The list of dependencies for other Linux distributions can also be found in the PetaLinux documentationstarting on page The PetaLinux tools require you to use 'bash' as your shell rather than 'dash', which is likely your default shell if you're running Ubuntu. To change this, just enter the following command, which will set your default from 'dash' to 'bash'.
The next thing to take care of will be to source the tools for PetaLinux to use within the terminal window.This installment of the Embedded Linux Adventure has come a bit later than I would have liked.
However in the meantime, I have traversed quite a bit of new material regarding embedded Linux development. This post will primarily be a short instruction set to get you started with PetaLinux and introduce you to some of the documentation that is available.
My Embedded Linux Adventure – Intro to PetaLinux
The short answer is that PetaLinux is a set of software tools that allows for streamlined embedded Linux development. Browsing the Xilinx documentation for PetaLinux of which there is a lot, see the links at the end reveals a few important things. For instance, while Xilinx provides tool for multiple operating systems, the PetaLinux tools are designed for Linux usage only.
Specific Linux-supported distros include Red Hat Enterprise 6. You will need a lot. As far as storage goes, your experience may be different but just prepare for massive usage. The last thing you want is to be nearly done with your project and run into road blocks due to a lack of storage space.
Getting started with PetaLinux is fairly straightforward, though it involves a lot of download and install time. Assuming you already have a version of Vivado and SDK installed if not, get them hereyou will need to download the PetaLinux installer of the same version number. The download is over 5GB between the installer and the final downloadso start it, and then go make a sandwich and watch a couple episodes of a show you like; unless you have a blazing fast connection, it will take a while.
The directory you install it into is not of tremendous consequence. Just cd into the directory the installer is located and run petalinux-v20XX. PetaLinux uses the same licensing tools as other Xilinx software, so if you already have your other tools licensed then you should not have any issues.
Once the install is complete, you will need to download a few other development libraries, including some bit compatible libraries even if you already have the 64 bit versions of the samesince some parts of the toolchain are bit executables.
A complete table of all the additional downloads is provided in the PetaLinux Reference Guide UG on page 10 also linked at the end of the post. I am leaving the whole thing out since it is quite long, but here is a screenshot of what I installed in line. Once all the installs have been completed, you can set up your tools and create a PetaLinux project directory. Subsequently, you will need to source the PetaLinux, and possibly the Vivado tool settings within the terminal environment you are using.
You can do this by typing in the two following commands:. Alternatively, you can add the two commands to the. The screenshots below show the modifications I made. Once this is done, change to the directory you want to create your project in and run the command shown in the screenshot below. In the next post I will go over the steps of configuring and building a project from a board support package BSPand adding a custom application into your Linux image.
November 13, November 6, April 17, June 4, Asked by jmccabe. BIN and image. However, when I use the files built at this point, the CoraZ gets stuck at "Starting kernel Please feel free to ask for more details; I'm new to this so, if there's something you need, you might have to tell me the command I need to use to get it sorry about that. After a successful build the components get packed then installed in the rootfs. Then the rootfs gets included in image.
Just thought I'd let you know your suggestion worked, so I've marked it as the answer.
Thank you for that. You need to be a member in order to leave a comment. Sign up for a new account in our community. It's easy! Already have an account? Sign in here. Embedded Linux Search In. Help needed on adding a custom app to Petalinux for CoraZ Asked by jmccabe coraz Posted May 14, edited. I'm just starting out with the CoraZ and having what seems like a weird issue. I'm hoping that someone can spot whether there's something I'm missing! John Edited May 14, by jmccabe.
Share this post Link to post Share on other sites. Recommended Posts. Posted May 15, BIN Steps above are same as a clean build, this solves the issue.I have a script that I would like to include in my PetaLinux root file system to have it execute at system startup. Xilinx - Adaptable.
Description Solution. Description I have a script that I would like to include in my PetaLinux root file system to have it execute at system startup. How do I have the PetaLinux build process incorporate this code properly? Solution To have the PetaLinux build tools incorporate pre-build binary code, follow this general flow: PetaLinux Use the petalinux-new-app to create an application. The -e option for petalinux-new-app will automatically select the application from menuconfig and will allow the application to be automatically built when the PetaLinux system is built.
Ensure that the all: and clean: sections of the makefile are empty. PetaLinux The --enable option for petalinux-create will automatically select the application from menuconfig and will allow the application to be automatically built when the PetaLinux system is built.
Ensure that the all:build:and clean: sections of the makefile are empty. Below is an example of the modifications:. Was this Answer Record helpful? Yes No. PetaLinux PetaLinux - What is the most straight-forward way to add some existing software for example, python interpreter to a petalinux-built image?
Of course, this is linux, and there are a lot of ways to do any operation. I'm thinking of at least two ways to solve my problem, but both seem to be not very elegant. View solution in original post.
Just thought that there is a simpler way, like binary there are a lot of prebuilt repos for arm, I think or source package install in conventional linux distros. May be Yocto is what I'm looking for, but I don't know anything about it, and not sure where to start from. Will dig there later, perhaps. I've also seen those pages, but they all require that I do the building from source.
I would hope expect? In my specific case, I'd like to add python. If there were a way to tie into that stage and specify some additional. Can anyone suggest a way to do this? At the same time, I'm trying to build an image from scratch using Yocto, but that opens up a whole other can of worms.
If someone could provide help on how to ensure the root file system includes Python, then I can abandon figuring out Yocto and just use PetaLinux. Sorry, I have not.
In my case Python was just a nice-to-have tool I would have liked to have going forward, so I gave up quickly. In the current PetaLinux version Also i compiled with yocto the meta-petalinux packages but I dont know how to add them i just need python to the petalinux image. I selected several libraries, but did not see a good python3 option. I will play around with it some more. If some one gets this to work with python3, let me know which library you selected. Sign In Help. Turn on suggestions.The PetaLinux Tools offers everything necessary to customize, build and deploy Embedded Linux solutions on Xilinx processing systems.
PetaLinux tools eases the development of Linux-based products; all the way from system boot to execution with the following tools:. With these tools developers can customize the boot loader, Linux kernel, or Linux applications.
They can add new kernels, device drivers, applications, libraries, and boot and test software stacks on the included full system simulator QEMU or on physical hardware via network or JTAG. PetaLinux tools enable developers to synchronize the software platform with the hardware design as it gains new features and devices. PetaLinux tools will automatically generate a custom, Linux Board Support Package including device drivers for Xilinx embedded processing IP cores, kernel and boot loader configurations.
Such capability allows software engineers to focus on their value-added applications rather than low level development tasks. PetaLinux includes tools to customize the boot loader, Linux kernel, file system, libraries and system parameters. These configuration tools are fully aware of Xilinx hardware development tools and custom-hardware-specific data files so that, for example, device drivers for Xilinx embedded IP cores will be automatically built and deployed according to the engineer-specified address of that device.
PetaLinux tools integrate development templates that allow software teams to create custom device drivers, applications, libraries and BSP configurations. PetaLinux provides a complete, reference Linux distribution that has been integrated and tested for Xilinx devices. The reference Linux distribution includes both binary and source Linux packages including:.
Built-in tools allow a single command to deploy and boot these elements to either physical hardware, or to the included full QEMU system emulator. With PetaLinux, developers can have their Xilinx-based hardware booted and running within about 5 minutes after installation; ready for application, library and driver development.
My Embedded Linux Adventure – Intro to PetaLinux
The PetaLinux Tools License is no longer required. Users can install and use PetaLinux tools to deploy royalty free OS images. PetaLinux Tools. Xilinx - Adaptable. PetaLinux Tools host. Embedded Software Ecosystem. Linux Configuration Tools.This post lists how to install an initscript into a build using PetaLinux Tools. Looking for PetaLinux help? Email inquiries centennialsoftwaresolutions. If you need help installing PetaLinux Tools check out link.
Note: I had to run all three of these commands, in this order, to have bootscript installed into the rootfs. Boot the rootfs:. PetaLinux Tools Yocto Project Mega-Manual 2.Tutorial 03 Running PetaLinux on ZedBoard (A-Z)
The pathname of the work directory in which the OpenEmbedded build system builds a recipe. This directory is located within the TMPDIR directory structure and is specific to the recipe being built and the system for which it is being built. The actual directory depends on several things:. In this case, the work directory the build system uses to build the package would be as follows:.
The OpenEmbedded build system provides support for starting services two different ways:. SysVinit: SysVinit is a system and service manager that manages the init system used to control the very basic functions of your system. The init program is the first program started by the Linux kernel when the system boots.
Init then controls the startup, running and shutdown of all other programs. To enable a service using SysVinit, your recipe needs to inherit the update-rc. The class helps facilitate safely installing the package on the target. To enable a service using systemd, your recipe needs to inherit the systemd class. See the systemd. This variable is used in recipes when using update-rc. The variable is mandatory. Specifies the options to pass to update-rc. Here is an example:.
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The variable's default value is "defaults", which is set in the update-rc. For more information on valid parameters, please see the update-rc. The destination directory. Caution Tasks that read from or write to this directory should run under fakeroot.
This variable can have two separate functions depending on the context: a recipe name or a resulting package name. PN refers to a recipe name in the context of a file used by the OpenEmbedded build system as input to create a package.
The name is normally extracted from the recipe file name.