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embedded_development_Qt_course_aux

Section 2 / Lecture 3

WiFi/SSH access

wpa_supplicant.conf

ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=<Insert 2 letter ISO 3166-1 country code here>

network={
 ssid="<Name of your wireless LAN>"
 psk="<Password for your wireless LAN>"
}

Section 2 / Lecture 4

Touch screen setup

sudo rm -rf LCD-show
git clone https://github.com/goodtft/LCD-show.git
chmod -R 755 LCD-show
cd LCD-show/

and then:

 sudo ./LCD5-show

source: http://www.lcdwiki.com/How_to_install_the_LCD_driver

Packages installation

sudo apt-get install default-libmysqlclient-dev dh-exec firebird-dev freetds-dev libasound2-dev libatspi2.0-dev libcups2-dev libdbus-1-dev libdouble-conversion-dev libfontconfig1-dev libgbm-dev libgl1-mesa-dev libgl-dev libgles2-mesa-dev libglib2.0-dev libglu1-mesa-dev libglu-dev libgtk-3-dev libharfbuzz-dev libicu-dev libinput-dev libjpeg-dev libmtdev-dev libpcre2-dev libpq-dev libproxy-dev libpulse-dev libsqlite3-dev libssl-dev libudev-dev libvulkan-dev libx11-dev libx11-xcb-dev libxcb-icccm4-dev libxcb-image0-dev libxcb-keysyms1-dev libxcb-randr0-dev libxcb-render-util0-dev libxcb-render0-dev libxcb-shape0-dev libxcb-shm0-dev libxcb-sync-dev libxcb-xfixes0-dev libxcb-xinerama0-dev libxcb-xkb-dev libxcb1-dev libxext-dev libxi-dev libxkbcommon-dev libxkbcommon-x11-dev libxrender-dev pkg-kde-tools unixodbc-dev qttools5-dev-tools

Qt base packages installation

Install Qt packages
deb http://raspbian.mirror.uk.sargasso.net/raspbian/ buster main contrib non-free rpi

Available servers: here https://www.raspbian.org/RaspbianMirrors/

  • sudo apt-get update
  • sudo apt-get build-dep qt4-x11
  • sudo apt-get build-dep libqt5gui5
  • sudo apt-get install libudev-dev libinput-dev libts-dev libxcb-xinerama0-dev libxcb-xinerama0
  • sudo apt install devscripts
  • sudo mk-build-deps libqt5gui5
  • sudo dpkg -i ./qtbase-opensource-src-build-deps_5.11.3+dfsg1-1+rpi1+deb10u3_armhf.deb
  • apt install libnss3 libnss3-dev

Symlinks

  • sudo mv /usr/lib/arm-linux-gnueabihf/libEGL.so.1.0.0 /usr/lib/arm-linux-gnueabihf/libEGL.so.1.0.0_backup
  • sudo mv /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2.0.0 /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2.0.0_backup
  • sudo ln -s /opt/vc/lib/libEGL.so /usr/lib/arm-linux-gnueabihf/libEGL.so.1.0.0
  • sudo ln -s /opt/vc/lib/libGLESv2.so /usr/lib/arm-linux-gnueabihf/libGLESv2.so.2.0.0
  • sudo ln -s /opt/vc/lib/libbrcmEGL.so /opt/vc/lib/libEGL.so
  • sudo ln -s /opt/vc/lib/libbrcmGLESv2.so /opt/vc/lib/libGLESv2.so
  • sudo ln -s /opt/vc/lib/libEGL.so /opt/vc/lib/libEGL.so.1
  • sudo ln -s /opt/vc/lib/libGLESv2.so /opt/vc/lib/libGLESv2.so.2

Section 2 / Lecture 6

mkdir rpi0
mkdir -p ~/rpi0/toolchain/src
mkdir -p ~/rpi0/sysroot
mkdir -p ~/rpi0/qt5


rsync -av pi@192.168.x.x:/lib sysroot
rsync -av pi@192.168.x.x:/usr/include sysroot/usr
rsync -av pi@192.168.x.x:/usr/lib sysroot/usr
rsync -av pi@192.168.x.x:/opt/vc sysroot/opt


wget https://raw.githubusercontent.com/Kukkimonsuta/rpi-buildqt/master/scripts/utils/sysroot-relativelinks.py
chmod +x sysroot-relativelinks.py
sudo ./sysroot-relativelinks.py sysroot

List of default packages in Buster: https://n8henrie.com/2019/08/list-of-default-packages-on-raspbian-buster-lite/

wget https://ftpmirror.gnu.org/binutils/binutils-2.31.tar.bz2
wget https://ftpmirror.gnu.org/gcc/gcc-8.3.0/gcc-8.3.0.tar.gz
tar xf gcc-8.3.0.tar.gz
tar xf binutils-2.31.tar.bz2

export WORKSPACE_ROOT=~/rpi0/toolchain
export PREFIX=${WORKSPACE_ROOT}/toolchain
export TARGET=arm-linux-gnueabihf
export SYSROOT=${WORKSPACE_ROOT}/../sysroot
export PATH=${PREFIX}/bin:$PATH
mkdir -p ${PREFIX}
cd ${WORKSPACE_ROOT}

mkdir -p build/binutils
pushd build/binutils
../../src/binutils-2.31/configure --target=**${**TARGET**}** --prefix=**${**PREFIX**}**--with-arch=armv6 --with-fpu=vfp --with-float=hard --disable-multilib
make -j4
make install
popd

cd ~/rpi0/toolchain/sources/gcc-8.3.0
contrib/download_prerequisites
mkdir -p ../../build/gcc2
pushd build/gcc2
../../src/gcc-8.3.0/configure --prefix=**${**PREFIX**}** --target=**${**TARGET**}** --with-sysroot=**${**SYSROOT**}** --enable-languages=c,c++ --disable-multilib --enable-multiarch --with-arch=armv6 --with-fpu=vfp --with-float=hard
make -j4
make install
popd

Section 3 / Lecture 7

Cross Compiling Qt

git clone git://code.qt.io/qt/qt5.git
git checkout 5.x
git submodule update --init --recursive
mkdir -p ~/rpi0/qt5/build5.x && cd ~/rpi0/qt5/build5.x


sudo ../qt5/configure -release -opengl es2 -device linux-rasp-pi-g++ -device-option CROSS_COMPILE=/home/user/rpi0/toolchain/toolchain/bin/arm-linux-gnueabihf- -opensource -confirm-license -nomake tests -no-pch -eglfs -xcb -skip qtwayland -skip qtwinextras -skip qt3d -skip qtandroidextras -skip qtcharts -skip qtdatavis3d -skip qtmacextras -skip qtpurchasing -skip qtquick3d -skip qtscript -skip qtpim -skip qtcanvas3d -skip qtqa -skip qtquicktimeline -skip qtrepotools -skip qtwebchannel -skip qtwebengine -skip qtwebglplugin -skip qtdocgallery -skip qtactiveqt -skip qtdoc -make libs -sysroot /home/user/rpi0/sysroot -prefix /usr/local/qt/5.15.0 -extprefix /opt/qt/5.15.0/raspbian/sysroot -hostprefix /opt/qt/5.15.0/raspbian -v 2>&1 | tee ../configure.log

make -j4
sudo mkdir -p /opt/qt/5.x
sudo chown ubuntu:ubuntu /opt/qt
sudo make install -j4 2>&1 | tee /home/user/rpi0/qt/install.log

Section 3 / Lecture 8

Copy Qt files over to RPi [Deploy]

Create /usr/local/qt/5.x dir in RPi mkdir -p /usr/local/qt/5.x

sudo rsync -av /opt/qt/5.x/raspbian/sysroot/ root@192.168.x.x:/usr/local/qt/5.x

sudo su
echo /usr/local/qt/5.x/lib > /etc/ld.so.conf.d/00-qt.5.x.conf
ldconfig
exit
sudo reboot

Section 4 / Lecture 11

https://ftp.gnu.org/gnu/gdb/gdb-8.2.1.tar.xz

Section 5 / Lecture 12

sudo systemctl edit --force --full my_app.service

[Unit]
Description=My App Service
Wants=network-online.target
After=network-online.target

[Service]
Type=simple
User=pi
WorkingDirectory=/home/pi/myapp
ExecStart=/home/pi/myapp/bin/myapp

[Install]
WantedBy=multi-user.target

sudo systemctl enable my_app.service

***Alternatively a service can be also created with
sudo nano my_app.service
and once edited, could be placed in the system and activated withe the following commands:
sudo cp my_app.service /lib/systemd/system/.
sudo systemctl daemon-reload
sudo systemctl enable my_app.service
sudo reboot

Section 5 / Lecture 13

  • In /boot/config.txt add: disable_splash=1
  • In /boot/cmdline.txt add:
    logo.nologo consoleblank=0 loglevel=1 quiet vt.global_cursor_default=0
  • and replace console=tty1 with: console=tty3
sudo systemctl disable getty@tty1
sudo systemctl edit --force --full splash_screen.service

[Unit]
Description=Splash Screen Service
DefaultDependencies=no
After=local-fs.target
Before=network-online.target

[Service]
WorkingDirectory=/home/pi/splash
ExecStart=/usr/local/qt/5.x/bin/qmlscene /home/pi/splash/SplashScreen.qml
StandardInput=tty
StandardOutput=tty

[Install]
WantedBy=sysinit.target

sudo systemctl enable splash_screen.service

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