Renesas
RZ/V AI

7.00

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starting your AI applications.

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How to build RZ/V2L AI SDK Source Code

This page explains how to build Linux with RZ/V2L AI SDK Source Code.

Supported version: RZ/V2L AI SDK v7.00

Introduction

AI SDK is a quick and easy AI Application development environment.
It is specifically made for RZ/V2L 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...).

Requirement

Users have launched RZ/V2L 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 120GB free space is necessary.
Linux PC	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/V2L AI SDK Source Code

Download the RZ/V2L AI SDK Source Code from the link below.

Download Link

AI SDK Source Code (RTK0EF0160F*_linux-src.zip) contains following files:

File name	Description
README.txt	README file.
rzv2l_ai-sdk_yocto_recipe_v*.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/V2L AI SDK.

Step 2: Extract RZ/V2L AI SDK Source Code

This step explains how to extract RZ/V2L 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.
```
<path to the working directory>/ai_sdk_work
```
  If not, please register the working directory path to an environment variable according to Step4: Extract RZ/V AI SDK package in Getting Started.

Make the working directory on your Linux PC.
```
mkdir -p ${WORK}/src_setup
```
Move to the working directory.
```
cd ${WORK}/src_setup
```

Extract RZ/V2L AI SDK Sorce Code zip file.

unzip <Path to the file>/RTK0EF0160F*_linux-src.zip -d ${WORK}/src_setup

Check the working directory to confirm the package contents.
```
ls -1 ${WORK}/src_setup
```
- If the above command prints followings, the package is extracted correctly.
```
README.txt
oss_pkg_rzv_v*.7z 
rzv2l_ai-sdk_yocto_recipe_v*.tar.gz
```

Step 3: Build RZ/V2L AI SDK Source Code

This step explains how to build Linux environment with RZ/V2L AI SDK Source Code

To install necessary sofware, run the following commands on your Linux PC.

sudo apt-get update
sudo apt install build-essential chrpath cpio debianutils diffstat file gawk \
gcc git iputils-ping libacl1 liblz4-tool locales python3 python3-git \
python3-jinja2 python3-pexpect python3-pip python3-subunit socat texinfo unzip \
wget xz-utils zstd

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.
```
git config --global user.email "you@example.com"
git config --global user.name "Your Name"
```

export YOCTO_WORK=${WORK}/src_setup/yocto
mkdir -p ${YOCTO_WORK}

Extract Yocto recipe package.

cd ${YOCTO_WORK}
tar zxvf ${WORK}/src_setup/rzv2l_ai-sdk_yocto_recipe_v*.tar.gz

Check the working directory to confirm Yocto recipes content.
```
ls -1 ${YOCTO_WORK}
```
- If the above command prints followings, Yocto recipes are extracted correctly.
```
extra
meta-arm
meta-openembedded
meta-renesas
meta-rz-features
meta-virtualization
patch
poky
```

Initialize a build using the oe-init-build-env script in Poky and set environment variable TEMPLATECONF to the below path.

cd ${YOCTO_WORK}
TEMPLATECONF=$PWD/meta-renesas/meta-rz-distro/conf/templates/rz-conf/ source poky/oe-init-build-env build

Run the following commands to add necessary layers for AI application to ${YOCTO_WORK}/build/conf/bblayers.conf (configration file for layers).

bitbake-layers add-layer ../meta-rz-features/meta-rz-graphics
bitbake-layers add-layer ../meta-rz-features/meta-rz-codecs
bitbake-layers add-layer ../meta-rz-features/meta-rz-drpai

Run the following commands to extract the OSS package.

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 procedures to apply the patch files.
1. Apply a patch file for AI SDK settings.
  This patch file applies offline build setting, SD card image size setting, eSD boot setting, Cross Compiler setting, and startup screen setting.
```
patch -p1 < ../patch/0000-AI_SDK-settings.patch
```
  Note The default size of the microSD card image created in this guide is approximately 16 GB.
  If you would like to change the microSD card image size, please refer to D1: Change the size of the microSD card image in WIC format.
2. Apply a patch file to add Tesseract Open Source OCR Engine for AI applications.
```
patch -p1 < ../patch/0001-tesseract.patch
```
3. Apply a patch file to add OpenMP for AI applications.
```
patch -p1 < ../patch/0002-openmp.patch
```

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=smarc-rzv2l 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/smarc-rzv2l directory.

Boot mode	File name	Description
eSD	core-image-weston-smarc-rzv2l.rootfs.wic.bmap core-image-weston-smarc-rzv2l.rootfs.wic.gz	WIC format SD card image
QSPI	core-image-weston-smarc-rzv2l.rootfs.wic.bmap core-image-weston-smarc-rzv2l.rootfs.wic.gz Flash_Writer_SCIF_RZV2L_SMARC_PMIC_DDR4_2GB_1PCS.mot bl2_bp_spi-smarc-rzv2l_pmic.srec fip-smarc-rzv2l_pmic.srec	Boot loader and WIC format SD card image

Run the following command to build cross compiler installer.
```
MACHINE=smarc-rzv2l bitbake core-image-weston -c populate_sdk
```
A necessary file listed below will be generated by the build command and the cross compiler installer will be located in build/tmp/deploy/sdk/rz-vlp-glibc-x86_64-core-image-weston-cortexa55-smarc-rzv2l-toolchain-*.sh.

File name Description

rz-vlp-glibc-x86_64-core-image-weston-cortexa55-smarc-rzv2l-toolchain-*.sh Cross compiler installer
Note If some errors occurred during the build, please clean the directory and rebuild it after a period of time according to the below commands.
```
cd ${YOCTO_WORK}/build
MACHINE=smarc-rzv2l bitbake core-image-weston -c cleanall
```
And run the build command again.
- For Linux kernel files
```
MACHINE=smarc-rzv2l bitbake core-image-weston
```
- For cross compiler installer
```
MACHINE=smarc-rzv2l bitbake core-image-weston -c populate_sdk
```

File name	Description
rz-vlp-glibc-x86_64-core-image-weston-cortexa55-smarc-rzv2l-toolchain-*.sh	Cross compiler installer

This is the end of how to build AI SDK Source Code.

You have prepared following files, which is same as the one provided in Step 3: Obtain RZ/V2L AI SDK in Getting Started, and you can run AI Applications according to Getting Started.
For more information on how to use each files, see the link in the How to use column.

Path	File name	Description	How to use
${YOCTO_WORK}/build/tmp/deploy/images/smarc-rzv2l	core-image-weston-smarc-rzv2l.rootfs.wic.bmap core-image-weston-smarc-rzv2l.rootfs.wic.gz	WIC format SD card image	Step 7-1: Setup RZ/V2L EVK in RZ/V2L EVK Getting Started
${YOCTO_WORK}/build/tmp/deploy/images/smarc-rzv2l	Flash_Writer_SCIF_RZV2L_SMARC_PMIC_DDR4_2GB_1PCS.mot bl2_bp_spi-smarc-rzv2l_pmic.srec fip-smarc-rzv2l_pmic.srec	Boot loader used when booting from QSPI	D2.How to boot from QSPI in Developer's Guide
${YOCTO_WORK}/build/tmp/deploy/sdk	rz-vlp-glibc-x86_64-core-image-weston-cortexa55-smarc-rzv2l-toolchain-*.sh	Cross compiler installer	After replacing the file in `${WORK}/ai_sdk_setup` directory with this file, follow the steps below to setup RZ/V AI SDK. Step 5: Setup RZ/V AI SDK in Getting Started

Note 1 For more Yocto Project information, please refer the link below:
https://docs.yoctoproject.org/5.0.11/brief-yoctoprojectqs/index.html

Note 2 When customizing Linux development environment, following link may help.
https://docs.yoctoproject.org/

Note 3 Regarding the eSD (Embedded SD) booting, please note the following:

The eSD boot procedure using microSD card described in this guide is for evaluation purposes only.
If you use the eSD boot, please implement the eSD on your board according to the standard "SD Specification Part 1 eSD Addendum (version 2.10)".

If you have any questions about AI SDK Source Code,
please add new issues to AI SDK GitHub issues.

Go to GitHub issues

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