#yocto

Install embedded Linux toolchain on windows

Published at November 25, 2020 ·  2 min read

The toolchain for embedded Linux should be matched for the target image, and that is why we can’t just find and download it from somewhere. Therefore, we should be it. This is a tutorial on how to build and install YOCTO SDK on a windows machine. This allows developing embedded Linux on windows using eclipse or even visual studio. Setup YOCTO build If you already have a YOCTO build, you need to make the following simple steps:...

Simple OpenAMP application for stm32mp157

Published at October 25, 2020 ·  3 min read

The stm32mp157 is SOC from STMicroelectronics , and it has within it a dual-core Cortex-A7 MPU and Cortex-M4 MCU. The Cortex-A7 is the application processor that operates Linux, and the Cortex-m4 runs RTOS or bare-metal application. The Cortex-M4 can be used for real-time tasks, such as creating a periodic and accurate control signal without jitter. In this kind of application, the Cortex-aA7 will run the master application and control the application of the Cortex-m4 using RPMsg Messaging Protocol....

Compile Linux kernel for zynq

Published at October 17, 2020 ·  2 min read

In previous post I shoed how to build and install Linux system on microzed board. When one tries to modify the kernel & u-boot, it is better to build and test it separately outside the Yocto build. I use Yocto’s kernel & u-boot sources and its SDK for the custom build. build the kernel To enable SDK , just type the following command. . /opt/poky/3.0.3/environment-setup-cortexa9t2hf-neon-poky-linux-gnueabi This script will define a series of enviement variables like $CC & $CXX that needed for the build....

install linux on microzed board

Published at August 1, 2020 ·  4 min read

The microzed development board has Xilinx zynq7000 chip. It has an application process unit with cortex a9 and FPGA fabric. The board also contains interfaces like SDIO and QSPI. I want to install Linux on it directly with yocto and without petalinux, which runs yocto behind the scene, so I tried to eliminate the need to use it. Why do so? It is interesting, and I have a lot of experience with yocto and it very easy to work with its script once you know it easy porting to other processors: IMX, stm32Mp157, etc' using build tools like CMake,Autotools, and yocto scripts make it very easy to port SW between different processors....

Custom opkg repository

Published at June 18, 2020 ·  2 min read

The post presenst simple example to create opkg repository to upgrade embbded linux systems using nginx server. The opkg pakcge should be installed as part of the image furing the first instalation. To add opkg to yocto image type type folloing line in file conf/local.conf IMAGE_INSTALL_append = " opkg \ " downlad and install opkg utils: git clone git://git.yoctoproject.org/opkg-utils and create Packages.gz file: cd /path-to-yocto-build/build/tmp/deploy/ipk ~/opkg-utils/opkg-make-index . > Packages.gz install nginx I haved used gentoo system , so inorder to install nginx on gentoo type:...

Install Yocto and kernel development tools of IMX8

Published at February 24, 2020 ·  2 min read

The GCC toolchain and kernel installation. The purpose of this post is to show the installation process of development tools for imx8m-var-dart, which is SOM made by Variscite. When using yocto, the kernel, userspace applications, and toolchain are part of the build. Still, when developing kernel modules, device tree changes, or userspace applications, it is more practical to make a standalone kernel build and to work on it outside the yocto....