This page explains how to build Linux with RZ/V2N AI SDK Source Code.
Supported version: RZ/V2N AI SDK v6.30
Introduction
AI SDK is a quick and easy AI Application development environment.
It is specifically made for RZ/V2N Evaluation Board Kit with fixed Linux components.
(For more information, please refer to Getting Started and AI SDK.)
To modify Linux component, you need to build AI SDK from source code.
AI SDK Source Code can generate the same Linux environment as AI SDK.
This page explains how to build AI SDK Source Code.
After you have completed this page, you would be able to change the source code and customize Linux environment (i.e., memory map, additional OSS etc...).
To customize the Linux environment, please refer to RZ/V2N BSP Manual Set.
Requirement
Users have launched RZ/V2N Evaluation Board Kit according to Getting Started, which means they can run AI Application on the board.
To build Yocto Linux, the below equipment should be prepared.
Equipment
Details
Linux PC
Approximately 200GB free space is necessary.
OS
Ubuntu 22.04 LTS
64bit OS must be used.
Now you are ready to build your Linux development environment.
Let's get started!!
Step 1: Obtain RZ/V2N AI SDK Source Code
Download the RZ/V2N AI SDK Source Code from the link below.
AI SDK Source Code (RTK0EF0189F*_linux-src.zip) contains following files:
File name
Description
README.txt
README file.
rzv2n_ai-sdk_yocto_recipe_*.tar.gz
Yocto recipe.
Yocto recipes are text files that contains necessary information to build Yocto Linux.
oss_pkg_rzv_v*.7z
OSS package.
OSS package is a set of Open Source Software source code used when building the Yocto Linux.
AI SDK Source Code provides this file to reproduce the same Linux environment provided in RZ/V2N AI SDK.
Step 2: Extract RZ/V2N AI SDK Source Code
This step explains how to extract RZ/V2N AI SDK Source Code zip file.
On your Linux PC, check you have already registered the environment variable WORK with the below command.
printenv WORK
If the above command prints followings, proceed next step.
Run the following commands and set the user name and email address before starting the build procedure.
It is needed to avoid errors when using git command to apply patches.
Run the following procedures to apply the patch file.
Optional: Apply patch file for bus setting release.
If you want to maximize the performance of DRP-AI, please apply the bus setting release patch.
This patch disables the control that minimizes the impact on operation when each RZ/V2N unit accesses DDR.
Applying this patch will improve the performance of single functions such as DRP-AI and Codec.
However, when combining various functions for compound control, the compound operation may not be executed correctly.
(Streaming stops, problems with the HDMI output screen, etc.)
such as the stream stopping. Please apply this patch at your own risk.
cp <Path to the file>/0001-remove-system-setting-for-RZV2N-AI_SDK-v6.30.patch ${YOCTO_WORK}cd${YOCTO_WORK}
patch -p1 < 0001-remove-system-setting-for-RZV2N-AI_SDK-v6.30.patch
Get e-CAM22_CURZH camera driver (MIPI) from e-con Systems.
The e-CAM22_CURZH camera driver (MIPI) used in AI SDK is not included in the RZ/V2N AI SDK Source Code.
The required driver needs to be obtained through the following procedure.
To build the e-CAM22_CURZH camera driver (MIPI) for RZ/V2N Evaluation Board Kit, contact e-con Systems at this link to obtain the patch file below.
File name
Description
e-CAM22_CURZ*.patch
e-CAM22_CURZH camera driver (MIPI) Yocto patch file for RZ/V2N
Copy and apply the patch file.
cp <Path to the file>/e-CAM22_CURZ*.patch ${YOCTO_WORK}cd${YOCTO_WORK}
patch -p1-i e-CAM22_CURZ*.patch
Check the working directory to confirm Yocto recipes content.
ls-1${YOCTO_WORK}
If the above command prints followings, Yocto recipes are extracted correctly.
Apply a patch file to add Tesseract Open Source OCR Engine for AI applications.
patch -p1 < ../patch/0001-tesseract.patch
Apply a patch file to add OpenMP for AI applications.
patch -p1 < ../patch/0002-openmp.patch
Run the following procedures to extract the OSS package.
Run the following commands to extract the OSS package to the ${YOCTO_WORK}/build directory.
cp${WORK}/src_setup/oss_pkg_rzv_*.7z ${YOCTO_WORK}
7z x ${YOCTO_WORK}/oss_pkg_rzv_*.7z -o${YOCTO_WORK}/build
Check the working directory to confirm the package contents.
ls-1${YOCTO_WORK}/build
If the above command prints followings, the package is extracted correctly.
conf
downloads
Run the following command to build the Linux kernel files.
(It takes a few hours to finish building depending on the user's host PC performance)
MACHINE=rzv2n-evk bitbake core-image-weston
All necessary files listed below will be generated by the build command and
they will be located in ${YOCTO_WORK}/build/tmp/deploy/images/rzv2n-evk directory.
A necessary file listed below will be generated by the build command and the cross compiler installer will be located in ${YOCTO_WORK}/build/tmp/deploy/sdk/rz-vlp-glibc-x86_64-core-image-weston-cortexa55-rzv2n-evk-toolchain-*.sh.
