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RTE Yocto - Development process description

Intro

We are using the Yocto Project as a build system.

We are using set of the publicly available layers, but also our custom layer meta-rte, which is described there.

The most important repository, which defines a release of the RTE Yocto BSP is the repository where you currently are - meta-rte repository. Tags in this repository correspond to the releases of the whole RTE Yocto BSP. The content (meta layers and their revisions) of given RTE Yocto BSP release is defined by the kas file. Description of kas file add project configuration can be found here.

Prerequisites

Prerequisites for the host PC to run the RTE Yocto BSP.

Hardware requirements

Minimal recommended hardware is:

  • 4 core CPU,
  • 8GB memory,
  • 100G storage.

Software requirements

Setting up the RTE Yocto BSP

Given release of the RTE Yocto BSP can be set up by checkout to proper tag in meta-rte repository.

Building images

mkdir rte-sdk
cd rte-sdk
git clone [email protected]:3mdeb/rte/meta-rte.git
kas-docker --ssh-dir ~/ssh-keys build meta-rte/kas.yml

It will clone layers defined in kas file, set up everything and build recipes defined in target section in kas file. After the RTE Yocto BSP has been set up, the rte-sdk content can look like:

rte-sdk
├── build
├── meta-openembedded
├── meta-rte
├── meta-sunxi
├── meta-swupdate
└── poky

build directory contains a set of sub-directories with configuration data (conf directory) and build results (tmp directory). Output files (e.g. built images) can be found in build/tmp/deploy/images/orange-pi-zero.

Building recipe

A recipe is a set of metadata to build given component. A recipe can build be used to build a small package, Linux kernel, or even the whole image.

Alternatively, you can invoke usual bitbake steps manually, e.g.:

SHELL=bash kas-docker --ssh-dir ~/.ssh/ssh-keys shell meta-rte/kas.yml -c 'bitbake core-image-minimal-swu'

When bash is your default shell, you don't have to set SHELL=bash like it was shown above.

Next steps

Once you are familiar with the RTE Yocto - Development process description, you can continue with the: