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README.md

PetaLinux project

Description

This PetaLinux project is to build and put together:

  • the Linux kernel
  • the root file system (rootfs)
  • the programs (colorbars, sdr-app, wsjtx, jt9 etc) to run the main "EBAZ4205 SDR and Spectrum" project

Getting Started with this PetaLinux project

build the PetaLinux Image of the SD card

Of course you need to have:

  • PetaLinux 2022.2 installed on Ubuntu 20.04 LTS or
  • PetaLinux 2023.1 on Ubuntu 22.04 LTS

  1. Git or download/unzip this folder to your PC in a directory of your choice

  2. cd to the PetaLinux folder

cd  /home/guido/Github/EBAZ4205_SDR_spectrum/PetaLinux/
  1. source PetaLinux there, so that the petalinux command can be launched
source /tools/Xilinx/PetaLinux/2022.2/bin/settings.sh
  1. Specify the directory where you exported the XSA file (hardware description) by Vivado
petalinux-config --get-hw-description=/home/guido/Github/EBAZ4205_SDR_spectrum/Vivado
  1. Build the project. The very first time it will take a lot of time (more than one hour on my Intel i9 12900H 32GB RAM vs 5 minutes in case of rebuilding after a Vivado hardware modification)
petalinux-build
  1. Create the files composing the image (BOOT.bin system.dtb uImage ...) to be flashed on the SD card. You'll find all these files in PetaLinux/images/linux
petalinux-package --boot --force --fsbl ./images/linux/zynq_fsbl.elf --fpga ./project-spec/hw-description/ebaz4205_wrapper.bit --u-boot
  1. Create the wic file (SD card image) in ...PetaLinux/images/linux/petalinux-sdimage.wic
petalinux-package --wic
  1. Flash the file on an SD card (>= 8 GB) using Balena-Etcher

test PetaLinux

  1. Insert the SD card in the EBAZ4205 slot
  2. Connect any kind of tty terminal set at 115200,8,n,1 to the serial port of EBAZ4205
  3. Power on

After a few seconds, you should see the PetaLinux boot sequence.

build PetaLinux sysroot and get (cross)compilers

If you want to build Linux applications for PetaLinux using your host PC (with Ubuntu) you need a sysroot. In fact Qt Creator installed on Ubuntu can build applications for the PetaLinux version installed in the Zynq7010 of your EBAZ4205 but, to do this, it needs a special compiler and linker which, running on Ubuntu, can build Cortex A9 32 bits executables for PetaLinux, using the proper shared libraries and their include files.

  1. cd to the PetaLinux folder
cd  /home/guido/EBAZ4205_SDR_spectrum/PetaLinux/
  1. source PetaLinux there, so that the petalinux commands can be launched
source /tools/PetaLinux/2022.2/bin/settings.sh
  1. Temporarily exclude "openssh-sftp-server" from building (because of a PetaLinux bug, the sysroot cannot be created with it!)
petalinux-config -c rootfs

  1. Navigate to "Filesystem Packages → console → network → openssh"

  2. Uncheck [ ] openssh-sftp-server

  3. exit saving

  4. Build the sysroot

petalinux-build -s

At the end, you'll find the SDK installer in ...PetaLinux/images/linux/sdk.sh

  1. Execute sdk.sh to explode the sysroot

cd to the PetaLinux/images/linux

cd  /home/guido/EBAZ4205_SDR_spectrum/PetaLinux/images/linux
  1. Run sdk.sh. The default destination directory is: /opt/PetaLinux/2022.2/
./sdk.sh
  1. Revert what you did at step 3 re-including "openssh-sftp-server" in building
petalinux-config -c rootfs
  1. Navigate to "Filesystem Packages → console → network → openssh"
  2. Check [X] openssh-sftp-server
  3. exit saving