Basic SoMLabs Yocto meta-layer - intended to be easy to use as VisionSOM-6ULL projects base
- Somlabs U-Boot bootloader support with SD/NAND/EMMC auto recognition, USB flashing mode and custom splash screen
- U-Boot fw-utils support
- Linux-imx kernel from meta-freescale
- Kernel device-tree structure prepared to be easily inherited by another layers(SOM module/Carrier board levels)
- Murata 1DX Wifi and Bluetooth module support Out-of-Box
- QT5 support with evdev/tslib touch panel/keyboard + gstreamer backend for qtmultimedia
- SOMLabs SL-TFT7-TP-800-480-P LCD+Touch panel support
- PXP support for gstreamer hardware acceleration
- gstreamer PXP plugins support
- Proper sleep/wakeup support
Demo Layer available here: /~https://github.com/QB4-dev/meta-somlabs-demo
On fresh Linux OS installation use this command to install tools needed by Yocto:
sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib \
build-essential chrpath socat cpio python3 python3-pip python3-pexpect \
xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev \
pylint3 xterm
Open terminal window and run following commands:
- create directories
mkdir visionsom_build
mkdir yocto-layers
cd yocto-layers
- download poky - reference Yocto Linux Distribution
git clone -b dunfell git://git.yoctoproject.org/poky.git poky
- download essential layers
git clone -b dunfell git://git.openembedded.org/meta-openembedded
git clone -b dunfell /~https://github.com/Freescale/meta-freescale.git
git clone -b dunfell /~https://github.com/QB4-dev/meta-somlabs-bsp
Init bulid environment
cd ..
source ./yocto-layers/poky/oe-init-build-env visionsom_build
local.conf
Edit yocto/visionsom_build/conf/local.conf file, You can use /conf/local.conf.sample from meta-somlabs-bsp layer as a template
- select proper machine:
MACHINE ??= "visionsom6ull-wifi-cb-std"and DISTRODISTRO ?= "poky"
You can choose between VisionSOM6ULL with or without WiFi module on VisionCB-STD form machine configs defined here: /~https://github.com/QB4-dev/meta-somlabs-bsp/tree/master/conf/machine
bblayers.conf
Edit yocto/visionsom_build/conf/bblayers.conf file, You can use /conf/bblayers.conf.sample from meta-somlabs-bsp layer as a template
Recommended layers list:
YOCTO_ROOT = "${@os.path.abspath(os.path.join("${TOPDIR}", os.pardir))}"
BBLAYERS ?= " \
${YOCTO_ROOT}/yocto-layers/poky/meta \
${YOCTO_ROOT}/yocto-layers/poky/meta-poky \
${YOCTO_ROOT}/yocto-layers/meta-openembedded/meta-oe \
${YOCTO_ROOT}/yocto-layers/meta-openembedded/meta-networking \
${YOCTO_ROOT}/yocto-layers/meta-openembedded/meta-python \
${YOCTO_ROOT}/yocto-layers/meta-freescale \
${YOCTO_ROOT}/yocto-layers/meta-somlabs-bsp \
"
Go back to visionsom_build directory and run:
bitbake core-image-minimal
First build will take a few hours depending on your host PC hardware
To flash complete image onto SD card go to visionsom_build/tmp/deploy/images/visionsom6ull-wifi-cb-std
insert your SD card and find card id using lsblk or dmesg cmd:
sda 8:0 0 465,8G 0 disk
├─sda3 8:3 0 9,7G 0 part [SWAP]
├─sda4 8:4 0 60,4G 0 part /media/projects
└─sda7 8:7 0 113,4G 0 part /mnt/yocto
sdb 8:16 0 119,2G 0 disk
├─sdb1 8:17 0 55,9G 0 part /
└─sdb2 8:18 0 55,9G 0 part /home
mmcblk0 179:0 0 1,9G 0 disk
└─mmcblk0p1 179:1 0 269,7M 0 part /media/mmc
In this example our sd card has been recognized as /dev/mmcblk0
Flash image using gunzip and dd tools:
gunzip -c core-image-minimal-visionsom6ull-wifi-cb-std.wic.gz | sudo dd of=/dev/mmcblk0 bs=1M iflag=fullblock oflag=direct conv=fsync status=progress
Insert card inside Your board and connect power supply
For EMMC/NAND board versions refer to:
https://wiki.somlabs.com/index.php/How_to_write_image_to_VisionSOM-6ULL_eMMC_on_Windows_and_Linux https://wiki.somlabs.com/index.php/How_to_write_image_to_VisionSOM-6ULL_NAND_memory_using_UUU_tool_on_Linux
Happy coding