Difference between revisions of "RZ-G/Boards/Yocto"

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Revision as of 12:56, 9 November 2015

This page contains information on building and running Yocto on the Renesas RZ/G1E and Renesas RZ/G1M Starter Kit boards.

Yocto versions

Poky-1.6.1 is supported. Specific commit of meta-openembedded is required.

Preliminary steps

  1. Download proprietary graphics and multimedia libraries and drivers from Renesas. Evaluation version of the libraries is available at
    http://www.renesas.com/support/downloads/download_results/C1000000-C9999999/mpumcu/rz/Evaluation_Software_Package.jsp
    and the drivers can be downloaded from http://am.renesas.com/support/downloads/jq_download_category/rz/RZG_Series_Evaluation_Software_Package_of_Linux_Drivers-20150727.zip The Graphic packages are required for X11 and Wayland. Multimedia drivers are optional.

  2. Install required packages:
    Ubuntu and Debian
    sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \
         build-essential chrpath socat libsdl1.2-dev xterm
    

    Fedora

    sudo yum install gawk make wget tar bzip2 gzip python unzip perl patch \
         diffutils diffstat git cpp gcc gcc-c++ glibc-devel texinfo chrpath \
         ccache perl-Data-Dumper perl-Text-ParseWords perl-Thread-Queue socat \
         SDL-devel xterm
    

    Refer to Yocto Project Quick Start for more information.

Building the BSP for the Renesas RZ/G1 Starter Kit Boards

  1. Create a directory and switch to it
    Warning! Yocto builds require a lot of disk space (up to 100 GB). Make sure you have got enough before starting the build.
    export WORK=<path-to-your-build-directory>
    mkdir $WORK
    cd $WORK
    
  2. Clone the basic Yocto layers:
    cd $WORK
    git clone git://git.yoctoproject.org/poky
    git clone git://git.openembedded.org/meta-openembedded
    git clone git://git.linaro.org/openembedded/meta-linaro.git
    
  3. Switch to proper branches/commits:
    cd $WORK/poky
    git checkout -b tmp yocto-1.6.1
    cd $WORK/meta-openembedded
    git checkout -b tmp dca466c074c9a35bc0133e7e0d65cca0731e2acf
    cd $WORK/meta-linaro
    git checkout -b tmp 8a0601723c06fdb75e62aa0f0cf15fc9d7d90167
    

    Other versions are not tested for compatibility.

  4. Clone the Renesas BSP layer:
    cd $WORK
    git clone https://github.com/renesas-rz/meta-renesas
    
  5. Download the proprietary libraries from
    http://www.renesas.com/support/downloads/download_results/C1000000-C9999999/mpumcu/rz/Evaluation_Software_Package.jsp
    and related kernel drivers from http://am.renesas.com/support/downloads/jq_download_category/rz/RZG_Series_Evaluation_Software_Package_of_Linux_Drivers-20150727.zip You should see the following files:
    $ ls -lh $WORK/proprietary
    total 8.1M
    -rw-rw-r-- 1 builduser builduser 5.8M Oct 27 10:25 RZG_Series_Evaluation_Software_Package_for_Linux-20150727-rzg.tar.gz
    -rw-rw-r-- 1 builduser builduser 2.3M Oct 27 10:25 RZG_Series_Evaluation_Software_Package_of_Linux_Drivers-20150727.tar.gz
    
  6. Populate the meta-renesas layer with graphics and multimedia drivers:
    cd $WORK/meta-renesas/meta-rzg1
    ./copy_gfx_software_<board>.sh ../../proprietary
    ./copy_mm_software_lcb.sh ../../proprietary
    
  7. Setup build environment:
    cd $WORK
    source poky/oe-init-build-env
    
  8. Prepare default configuration files:
    cd $WORK/build
    cp ../meta-renesas/meta-rzg1/templates/<board>/bblayers.conf ./conf
    

    For weston/wayland:

    cp ../meta-renesas/meta-rzg1/templates/<board>/local-wayland.conf ./conf/local.conf
    

    For X11:

    cp ../meta-renesas/meta-rzg1/templates/<board>/local-x11.conf ./conf/local.conf
    

    Edit local.conf to enable/disable graphics and multimedia proprietary drivers support.

  9. Start the build
    For weston/wayland:
    bitbake core-image-weston
    

    For X11:

    bitbake core-image-x11
    

    Building the image can take up to a few hours depending on your host system performance.
    After the build has been completed successfully, you should see the output similar to:

    NOTE: Tasks Summary: Attempted 4704 tasks of which 31 didn't need to be rerun and all succeeded.
    

    and the command prompt should return.

  10. Bitbake has generated all the necessary files in ./tmp/deploy/images directory.
    You can verify its content:
    [builduser]$ ls -lh `find ./tmp/deploy/images/skrzg1e/ -maxdepth 1 -type l -print`
    lrwxrwxrwx 1 builduser builduser 56 Oct 27 12:33 ./tmp/deploy/images/skrzg1e/core-image-weston-skrzg1e.manifest -> core-image-weston-skrzg1e-20151027185916.rootfs.manifest
    lrwxrwxrwx 1 builduser builduser 55 Oct 27 12:33 ./tmp/deploy/images/skrzg1e/core-image-weston-skrzg1e.tar.bz2 -> core-image-weston-skrzg1e-20151027185916.rootfs.tar.bz2
    lrwxrwxrwx 1 builduser builduser 87 Oct 27 12:20 ./tmp/deploy/images/skrzg1e/modules-skrzg1e.tgz -> modules--3.10+gitef3cb04de0d01178a64fea73ffa4c5e21e79f310-r0-skrzg1e-20151027185916.tgz
    lrwxrwxrwx 1 builduser builduser 55 Oct 27 12:31 ./tmp/deploy/images/skrzg1e/u-boot.bin -> u-boot-skrzg1e-v2013.01.01+gitAUTOINC+cb82c56b53-r0.bin
    lrwxrwxrwx 1 builduser builduser 55 Oct 27 12:31 ./tmp/deploy/images/skrzg1e/u-boot-skrzg1e.bin -> u-boot-skrzg1e-v2013.01.01+gitAUTOINC+cb82c56b53-r0.bin
    lrwxrwxrwx 1 builduser builduser 56 Oct 27 12:31 ./tmp/deploy/images/skrzg1e/u-boot-skrzg1e.srec -> u-boot-skrzg1e-v2013.01.01+gitAUTOINC+cb82c56b53-r0.srec
    lrwxrwxrwx 1 builduser builduser 56 Oct 27 12:31 ./tmp/deploy/images/skrzg1e/u-boot.srec -> u-boot-skrzg1e-v2013.01.01+gitAUTOINC+cb82c56b53-r0.srec
    lrwxrwxrwx 1 builduser builduser 86 Oct 27 12:20 ./tmp/deploy/images/skrzg1e/uImage -> uImage--3.10+gitef3cb04de0d01178a64fea73ffa4c5e21e79f310-r0-skrzg1e-20151027185916.bin
    lrwxrwxrwx 1 builduser builduser 86 Oct 27 12:20 ./tmp/deploy/images/skrzg1e/uImage+dtb -> uImage+dtb--3.10+gitef3cb04de0d01178a64fea73ffa4c5e21e79f310-r0-skrzg1e-20151027185916
    lrwxrwxrwx 1 builduser builduser 94 Oct 27 12:20 ./tmp/deploy/images/skrzg1e/uImage-r8a7745-skrzg1e.dtb -> uImage--3.10+gitef3cb04de0d01178a64fea73ffa4c5e21e79f310-r0-r8a7745-skrzg1e-20151027185916.dtb
    lrwxrwxrwx 1 builduser builduser 86 Oct 27 12:20 ./tmp/deploy/images/skrzg1e/uImage-skrzg1e.bin -> uImage--3.10+gitef3cb04de0d01178a64fea73ffa4c5e21e79f310-r0-skrzg1e-20151027185916.bin
    lrwxrwxrwx 1 builduser builduser 82 Oct 27 12:20 ./tmp/deploy/images/skrzg1e/zImage -> zImage--3.10+gitef3cb04de0d01178a64fea73ffa4c5e21e79f310-r0-skrzg1e-20151027185916
    lrwxrwxrwx 1 builduser builduser 86 Oct 27 12:20 ./tmp/deploy/images/skrzg1e/zImage+dtb -> zImage+dtb--3.10+gitef3cb04de0d01178a64fea73ffa4c5e21e79f310-r0-skrzg1e-20151027185916
    

    uImage is the kernel image, uImage-r8a7745-skrzg1e.dtb is the device tree file, uImage+dtb is the combined kernel and device tree image, core-image-weston-skrzg1e.tar.bz2 is the rootfs, modules-skrzg1e.tgz are the kernel modules.

  11. You can now boot the RZ/G1E or RZ/G1M Starter Kit boards over TFTP and NFS

Running the Yocto image

Linux kernel can be booted from microSD card or from TFTP. Root FS can be mounted from micro SD card or via NFS.

Loading kernel via TFTP and rootfs via NFS

Follow these steps to setup working TFTP and NFS servers:

  1. Setup a TFTP server:
    Ubuntu and Debian
    Install tftpd-hpa package along with tftp tools:
    sudo apt-get install tftp tftpd-hpa
    

    Fedora

    1. Install necessary packages:
      sudo yum install tftp-server tftp
      

      tftp-server is a part of xinetd. See Fedora manual for more information.

    2. Enable TFTP server:
      sudo vi /etc/xinetd.d/tftp 
      
      Set
      disable = no
      Save file and exit.
    3. Start xinetd:
      sudo systemctl start xinetd.service
      sudo systemctl enable xinetd.service
      
  2. Copy uImage and the dtb file from $WORK/build/tmp/deploy/images/<board>/ to the TFTP server root.
    Note 1: The instructions here use separate kernel and dtb files. See section Loading kernel and rootfs from microSD card for using the combined kernel+dtb image
    Note 2: On Ubuntu/Debian the TFTP server root may be under /srv/tftp instead of /var/lib/tftpboot

    RZ/G1E Starter Kit board:
    cp $WORK/build/tmp/deploy/images/skrzg1e/uImage /var/lib/tftpboot/
    cp $WORK/build/tmp/deploy/images/skrzg1e/uImage-r8a7745-skrzg1e.dtb /var/lib/tftpboot/
    

    RZ/G1M Starter Kit board:

    cp $WORK/build/tmp/deploy/images/skrzg1m/uImage /var/lib/tftpboot/
    cp $WORK/build/tmp/deploy/images/skrzg1m/uImage-r8a7743-skrzg1m.dtb /var/lib/tftpboot/
    
  3. Verify that TFTP server is working.
    tftp localhost -c get uImage && ls uImage
    
  4. Setup NFS server
    Ubuntu and Debian
    1. Install necessary packages:
      sudo apt-get install nfs-kernel-server nfs-common
      
    2. Start NFS server:
      sudo /etc/init.d/nfs-kernel-server start
      

    Fedora

    1. Install necessary packages:
      sudo yum install nfs-utils
      
    2. Enable and start nfs server:
      sudo systemctl enable rpcbind.service 
      sudo systemctl enable nfs-server.service 
      sudo systemctl enable nfs-lock.service 
      sudo systemctl enable nfs-idmap.service
      sudo systemctl start rpcbind.service 
      sudo systemctl start nfs-server.service 
      sudo systemctl start nfs-lock.service 
      sudo systemctl start nfs-idmap.service
      
  5. Export root FS to NFS. (Change IMAGE and MACHINE to fit your build).
    1. Unpack rootfs to a dedicated directory:
      IMAGE=weston|x11|sato|directfb
      MACHINE=skrzg1e|skrzg1m
      NFS_ROOT=/nfs/${MACHINE}
      sudo mkdir -p "${NFS_ROOT}"
      sudo rm -rf "${NFS_ROOT}"/*
      sudo tar -xjf "${WORK}/build/tmp/deploy/images/${MACHINE}/core-image-${IMAGE}-${MACHINE}.tar.bz2" -C "${NFS_ROOT}"
      sync
      
    2. Edit /etc/exports:
      sudo vi /etc/exports
      

      add

      /nfs/skrzg1e	*(rw,no_subtree_check,sync,no_root_squash,no_all_squash)
      /nfs/skrzg1m	*(rw,no_subtree_check,sync,no_root_squash,no_all_squash)
      

      Save the file and exit.

    3. Force NFS server to re-read /etc/exports
      sudo exportfs -a
  6. Verify that NFS is working.
    [builduser@buildmachine ~]$ showmount -e localhost
    Export list for localhost:
    /nfs/skrzg1e *
    /nfs/skrzg1m *
    
  7. Boot into U-Boot command prompt
    For the RZ/G1E Starter Kit board
    1. Make sure SW9 is on pin 1 side.
      Switch pin layout
    2. Connect to serial console over microUSB using minicom or picocom.
    3. Switch the board on or reset it. Press any key to stop U-Boot automatic countdown and go to U-Boot prompt.

    Refer to RZ/G1E Starter Kit board page for more information.
    For the RZ/G1M Starter Kit board

    1. TBD
  8. Configure Ethernet, TFTP, and kernel command line in U-Boot:
    setenv ipaddr <board-ip>
    setenv serverip <your-computer-ip>
    setenv bootcmd 'tftp 0x40007fc0 uImage; tftp 0x40f00000 uImage-r8a7745-slrzg1e.dtb; bootm 0x40007fc0 - 0x40f00000'
    setenv bootargs 'console=ttySC10,38400 ignore_loglevel rw root=/dev/nfs nfsroot=<your-computer-ip>:<nfs-path>,nfsvers=3 ip=<board-ip>:<your-computer-ip>::255.255.255.0:skrzg1e vmalloc=384M'
    saveenv
    

    Replace <board-ip> with the proper IP address for the board. Replace <your-computer-ip> with the IP address of your computer, where tftp and nfs servers are installed. Replace <nfs-path> with the exported path of the root FS.
    For example:

    setenv ipaddr 192.168.1.3
    setenv serverip 192.168.1.2
    setenv bootcmd 'tftp 0x40007fc0 uImage; tftp 0x40f00000 uImage-r8a7745-skrzg1e.dtb; bootm 0x40007fc0 - 0x40f00000'
    setenv bootargs 'console=ttySC10,38400 ignore_loglevel rw root=/dev/nfs nfsroot=192.168.1.2:/nfs/skrzg1e,nfsvers=3 ip=192.168.1.3:192.168.1.2::255.255.255.0:skrzg1e vmalloc=384M'
    saveenv
    

    The last command writes the configuration to SPI flash.

    => saveenv                                                                                                                                  
    Saving Environment to SPI Flash...                                                                                                          
    SF: Detected S25FL512S with page size 256 KiB, total 64 MiB                                                                                 
    Erasing SPI flash...Writing to SPI flash...done 
    

    You can also use

    dhcp
    

    command to obtain information from DHCP server.
    Note: You can always see the environment with printenv command. Refer to U-Boot manual for details.

  9. Verify the connection over Ethernet from U-Boot:
    ping <your-computer-ip>
    

    You should see:

    => ping 192.168.1.2                                                                                                                
    sh_eth Waiting for PHY auto negotiation to complete... done
    sh_eth: 100Base/Full
    Using sh_eth device
    host 192.168.1.2 is alive
    
  10. Reset the board by pushing SW5 "Reset".
  11. The board should boot the kernel:
    SKRZG1E SPI_LOADER V0.07c 2014.10.20                                                                                                           
    DEVICE S25FL512                                                                                                                             
                                                                                                                                               
    U-Boot 2013.01.01-gcb82c56-dirty (Sep 20 2015 - 21:30:23)
    
    CPU: Renesas Electronics R8A7745 rev 2.0
    Board: RZ/G1E Starter Kit Board
    
    DRAM:  1 GiB
    MMC:   sh-sdhi: 0, sh-sdhi: 1
    SF: Detected S25FL512S with page size 256 KiB, total 64 MiB
    In:    serial
    Out:   serial
    Err:   serial
    Net:   sh_eth                                                                                                                             
    Hit any key to stop autoboot:  0                                                                                                            
    sh_eth Waiting for PHY auto negotiation to complete... done                                                                                 
    sh_eth: 100Base/Full                                                                                                                        
    Using sh_eth device                                                                                                                         
    TFTP from server 192.168.1.2; our IP address is 192.168.1.3                                                                             
    Filename 'uImage'.                                                                                                                          
    Load address: 0x40007fc0                                                                                                                    
    Loading: #################################################################                                                                  
             #################################################################                                                                  
             #################################################################                                                                  
             ##############################################                                                                                     
             3.5 MiB/s                                                                                                                          
    done                                                                                                                                        
    Bytes transferred = 3525472 (35cb60 hex)                                                                                                    
    sh_eth:1 is connected to sh_eth.  Reconnecting to sh_eth                                                                                    
    sh_eth Waiting for PHY auto negotiation to complete... done                                                                                 
    sh_eth: 100Base/Full                                                                                                                        
    Using sh_eth device                                                                                                                         
    TFTP from server 192.168.1.2; our IP address is 192.168.1.3                                                                             
    Filename 'uImage-r8a7745-skrzg1e.dtb'.                                                                                                         
    Load address: 0x40f00000                                                                                                                    
    Loading: ##                                                                                                                                 
             3 MiB/s                                                                                                                            
    done                                                                                                                                        
    Bytes transferred = 24859 (611b hex)                                                                                                        
    ## Booting kernel from Legacy Image at 40007fc0 ...                                                                                         
       Image Name:   Linux-3.10.31-ltsi                                                                                                         
       Image Type:   ARM Linux Kernel Image (uncompressed)                                                                                      
       Data Size:    3525408 Bytes = 3.4 MiB                                                                                                    
       Load Address: 40008000                                                                                                                   
       Entry Point:  40008000                                                                                                                   
       Verifying Checksum ... OK                                                                                                                
    ## Flattened Device Tree blob at 40f00000                                                                                                   
       Booting using the fdt blob at 0x40f00000                                                                                                 
       XIP Kernel Image ... OK                                                                                                                  
    OK                                                                                                                                          
       Loading Device Tree to 40ef6000, end 40eff11a ... OK                                                                                     
                                                                                                                                                
    Starting kernel ...                                                                                                                         
    

Loading kernel and rootfs from microSD card

Both kernel and root FS can be loaded from a microSD card. The approach requires only a console cable. No Ethernet connection is needed.

  1. Find a reliable microSD card with an adapter to fit your computer. 4 GB should be enough for the task.
  2. Plug the SD card into you computer. Locate the proper device for it, typically /dev/mmcblk0. Use
    dmesg | tail
    

    to print latest messages if in doubt.
    WARNING! Be very careful. Do not select you root partition or any other device with important information. It may be destroyed!
    Double-check that device name is correct by mounting and examining it's content.

  3. Make sure the SD card doesn't contain any important files.
    WARNING! Next step may erase the SD card completely. All files my be lost.
  4. Format the card with one partition with EXT3 file system.
    TBD Update this page with a script which formats the card
  5. Copy root fs to the sd card:
    SD=<path-to-your-device-partition>
    SD_ROOT=/tmp/sd-tool
    sudo umount "${SD}"
    sudo mkdir -p "${SD_ROOT}"
    sudo mount "${SD}" "${SD_ROOT}"
    sudo rm -rf "${SD_ROOT}"/*
    sudo cp "${BUILDDIR}/tmp/deploy/images/${MACHINE}/uImage+dtb" "${SD_ROOT}/boot/"
    sudo tar -xjf "${BUILDDIR}/tmp/deploy/images/${MACHINE}/core-image-${IMAGE}-${MACHINE}.tar.bz2" -C "${SD_ROOT}"
    sudo umount "${SD}"
    
  6. Insert the SD card into microSD slot on the board.
  7. Boot the board into U-Boot command prompt. Refer to section Boot into U-Boot command prompt

  8. Configure kernel command line in U-Boot:
    setenv bootcmd 'ext4load mmc 1:1 0x40007fc0 /boot/uImage+dtb; bootm 0x40007fc0'
    setenv bootargs 'console=ttySC10,38400 ignore_loglevel rw rootfstype=ext3 root=/dev/mmcblk0p1 rootwait vmalloc=384M'
    saveenv
    

    The last command writes the configuration to SPI flash.

    => saveenv                                                                                                                                  
    Saving Environment to SPI Flash...                                                                                                          
    SF: Detected S25FL512S with page size 256 KiB, total 64 MiB                                                                                 
    Erasing SPI flash...Writing to SPI flash...done 
    
  9. Reset the board by pushing SW5 "Reset" on the RZ/G1E Starter Kit board, SW9 "Reset" on the RZ/G1M Starter Kit board
  10. The board should boot the kernel:
    SKRZG1E SPI_LOADER V0.07c 2014.10.20                                                                                                           
    DEVICE S25FL512                                                                                                                             
                                                                                                                                                
                                                                                                                                                
    U-Boot 2013.01.01-gcb82c56-dirty (Sep 20 2015 - 21:30:23)
    
    CPU: Renesas Electronics R8A7745 rev 2.0
    Board: RZ/G1E Starter Kit Board
    
    DRAM:  1 GiB
    MMC:   sh-sdhi: 0, sh-sdhi: 1
    SF: Detected S25FL512S with page size 256 KiB, total 64 MiB
    In:    serial
    Out:   serial
    Err:   serial
    Net:   sh_eth                                                                                                                            
    Hit any key to stop autoboot:  0                                                                                                            
    3534603 bytes read in 498 ms (6.8 MiB/s)                                                                                                    
    ## Booting kernel from Legacy Image at 40007fc0 ...                                                                                         
       Image Name:   'Linux-3.10.31-ltsi'                                                                                                       
       Image Type:   ARM Linux Kernel Image (uncompressed)                                                                                      
       Data Size:    3534539 Bytes = 3.4 MiB                                                                                                    
       Load Address: 40008000                                                                                                                   
       Entry Point:  40008000                                                                                                                   
       Verifying Checksum ... OK                                                                                                                
       XIP Kernel Image ... OK                                                                                                                  
    OK                                                                                                                                          
                                                                                                                                                
    Starting kernel ...      
    

Multiboot

U-Boot allows multiboot configurations. U-Boot can try different boot commands one by one until it finds the first working command. Use command line interface to configure u-boot. Dual source (MMC and NFS) boot configuration for the RZ/G1E Starter Kit board:

setenv mkBootcmdMMC 'setenv bootcmd ext4load mmc 1:1 0x40007fc0 /boot/uImage+dtb; bootm 0x40007fc0'
setenv mkBootargsMMC 'setenv bootargs console=ttySC10,38400 ignore_loglevel rw rootfstype=ext3 root=/dev/mmcblk0p1 rootwait vmalloc=384M'
setenv mkBootcmdTFTP 'setenv bootcmd tftp 0x40007fc0 uImage+dtb; bootm 0x40007fc0'
setenv mkBootargsNFS 'setenv bootargs console=ttySC10,38400 ignore_loglevel rw root=/dev/nfs nfsroot=192.168.1.27:/nfs/skrzg1e,nfsvers=3 ip=192.168.1.107:192.168.1.27::255.255.255.0:skrzg1e vmalloc=384M'
setenv bootMMC 'run mkBootargsMMC; run mkBootcmdMMC; run bootcmd' 
setenv bootNET 'run mkBootargsNFS; run mkBootcmdTFTP; run bootcmd'
setenv bootcmd 'run bootMMC; run bootNET'

For the RZ/G1M Starter kit board mkBootcmdMMC, mkBootargsMMC, mkBootcmdTFTP and mkBootargsNFS should be changed to use the correct names.

Building QT

This section describes building Qt 5 for Renesas RZ-G boards.

  1. Clone the meta-qt5 layer:
    cd $WORK
    git clone https://github.com/meta-qt5/meta-qt5.git
    
  2. Switch to the proper branch/commit:
    cd $WORK/meta-qt5
    git checkout -b tmp 6f0dd9f7cb4166f22b78c0813819c636f6382e4f
    
  3. Edit $WORK/meta-qt5/recipes-qt/qt5/qtmultimedia_git.bb for compatibility with the current bitbake version:
    -EXTRA_QMAKEVARS_PRE += "${@bb.utils.contains_any('PACKAGECONFIG', 'gstreamer gstreamer010', '', 'CONFIG+=done_config_gstreamer', d)}"
    +EXTRA_QMAKEVARS_PRE += "${@bb.utils.contains('PACKAGECONFIG', 'gstreamer', '', 'CONFIG+=done_config_gstreamer', d)}" 
    
  4. Add meta-qt5 and meta-rubby to bblayers.conf:
      ${TOPDIR}/../meta-qt5 \
      ${TOPDIR}/../meta-openembedded/meta-ruby \
    
  5. Create your own configuration for Qt 5 by add the packages that you need to IMAGE_INSTALL:
    IMAGE_INSTALL_append := qtbase ...
    

Building the Renesas demos

This section describes building the demos for Renesas RZ-G boards.

  1. Clone the meta-rzg-demos layer:
    cd $WORK
    git clone https://github.com/renesas-rz/meta-rzg-demos
    
  2. Add meta-rzg-demos to bblayers.conf:
      ${TOPDIR}/../meta-rzg-demos
    
  3. Edit $WORK/meta-linaro/meta-linaro-toolchain/recipes-devtools/gdb/gdb-linaro-7.6.1.inc to fix the URI of the gdb package:
    -SRC_URI = "https://releases.linaro.org/${MMYY}/components/toolchain/gdb-linaro/gdb-${PV}-${RELEASE}.tar.bz2"
    +SRC_URI = "https://releases.linaro.org/archive/${MMYY}/components/toolchain/gdb-linaro/gdb-${PV}-${RELEASE}.tar.bz2"
    
  4. Build core-image-weston:
    bitbake core-image-weston
    

Known issues and limitations

TBD