meta-licheepizero

Instruction how to build an image for Lichee Pi Zero and Lichee Pi Zero Dock in Yocto

Products:

Lichee Pi Zero Version

Lichee Pi Zero Dock Version

General Note:

Assumed that Linux Ubuntu is installed

List of tested elements

Ethernet
Led
Headphone

List of not tested elements

WiFi
Lcd
Touchscreen(aligned driver for kernel 5.15)
Backlight for Lcd
Microphone
Bluetooth - appears during system boot up

How to build an images

First make sure to following packages are installed in system

sudo apt-get install gawk wget git-core diffstat unzip texinfo gcc-multilib build-essential chrpath socat libsdl1.2-dev xterm libmpc-dev libgmp3-dev

Note: More informations can be found on Yocto reference manual.
Download necessary Yocto packaged listed below. Be sure to be in root of home folder.

mkdir yocto
cd yocto
mkdir build
git clone git://git.yoctoproject.org/poky --depth 1 -b kirkstone
cd poky
git clone git://git.openembedded.org/meta-openembedded --depth 1 -b kirkstone
git clone https://github.com/meta-qt5/meta-qt5.git --depth 1 -b kirkstone
git clone https://github.com/voloviq/meta-licheepizero --depth 1 -b kirkstone
Select directory to build Linux

Zero version
source oe-init-build-env ~/yocto/build/licheepizero
Zero Dock version
source oe-init-build-env ~/yocto/build/licheepizero-dock
Modify bblayers.conf(located in ~/yocto/build/licheepizero/conf(or licheepizero-dock/conf))

BBLAYERS ?= " \
${HOME}/yocto/poky/meta \
${HOME}/yocto/poky/meta-poky \
${HOME}/yocto/poky/meta-openembedded/meta-oe \
${HOME}/yocto/poky/meta-openembedded/meta-networking \
${HOME}/yocto/poky/meta-openembedded/meta-python \
${HOME}/yocto/poky/meta-openembedded/meta-multimedia \
${HOME}/yocto/poky/meta-qt5 \
${HOME}/yocto/poky/meta-licheepizero \
"

Note: Please adapt PATH of conf/bblayers.conf if necessary.
Modify local.conf(located in ~/yocto/build/licheepizero/conf(or licheepizero-dock/conf)) file
- modify line with "MACHINE ??" to add "licheepizero-dock" or "licheepizero"
- align DL_DIR = "${HOME}/yocto/downloads"
- align SSTATE_DIR = "${HOME}/yocto/sstate-cache"
- align TMPDIR = "${HOME}/yocto/tmp"
- add at the end following records
  
  RM_OLD_IMAGE = "1"
  INHERIT += "rm_work"
  MACHINEOVERRIDES .= ":use-mailine-graphics"
  LICENSE_FLAGS_ACCEPTED = "commercial"
Note: Please adapt rest of conf/local.conf parameters if necessary.
Build objects
- console image
  bitbake console-image
- qt5 image
  bitbake qt5-image
- qt5 toolchain sdk
  bitbake meta-toolchain-qt5
After compilation images appears in

Zero version
~/yocto/tmp/deploy/images/licheepizero
Zero Dock version
~/yocto/tmp/deploy/images/licheepizero-dock
Insert SD CARD into dedicated CARD slot and issue following command to write an image

Note:
Be 100% sure to provide a valid device name (of=/dev/sde). Wrong name "/dev/sde" dameage Your system file !

Zero version
sudo dd if=~/yocto/tmp/deploy/images/licheepizero/qt5-image-licheepizero.sunxi-sdimg of=/dev/sde bs=1024
Zero Dock verison
sudo dd if=~/yocto/tmp/deploy/images/licheepizero-dock/qt5-image-licheepizero-dock.sunxi-sdimg of=/dev/sde bs=1024

Audio

To play mp3 or ogg files type
mpv ogg-file-name.ogg
mpv mp3-file-name.mp3
cvlc mp3-file-name.mp3
To change volume
amixer set Headphone 10%+
amixer set Headphone 10%-
or just
amixer set Headphone 10%

Amixer available options
amixer scontrols

Microphone on
amixer -c 0 cset numid=12 2

Record some voice from microphone
arecord -D hw:0,0 -d 3 -f S16_LE -r 16000 tmp.wav

To get sound device info
ls /dev/snd

# Limitation

- sunxi_mali is probably not working
- rootfs-resize not working (SD CARD size can be resized manualy)
- no wiringpi or similar library to driver GPIO in C code
- discover problem when WiFi connected to access point (probably some drivers issues), nevertheless WiFi works

voloviq / meta-licheepizero Goto Github PK