开发板QT环境变量设置 / QT Environment Setting on Board

[Unit]
Description=Autostart Qt 5 Demo
Wants=systemd-udev-settle.service
After=systemd-udev-settle.service

[Service]
Type=simple
User=root
ExecStart=/usr/bin/qtLauncher /usr/bin/QtDemo

# Detach the framebuffer console from fb0 before starting the QtDemo and
# reattach it after QtDemo has stopped.
# See <linux>/Documentation/fb/fbcon.txt for details.
# NOTE: The dash "-" allows the commands to fail, e.g. if no virtual console
# was started.
# FIXME Is there a better command without shell invocation?
ExecStartPre=-/bin/sh -c "echo 0 > /sys/devices/virtual/vtconsole/vtcon1/bind"
ExecStopPost=-/bin/sh -c "echo 1 > /sys/devices/virtual/vtconsole/vtcon1/bind; echo -n -e '\033[9;0]' > /dev/tty0"

[Install]
WantedBy=multi-user.target

#!/bin/sh
# use interactive shell environment for machine specific env vars
. /etc/profile

if [ -e /dev/input/res-touchscreen ] && [ -e /dev/input/touchscreen0 ]; then
    if [ ! -e /etc/pointercal ]; then
        #res. touchscreen is not calibrate. We should do this first
        /usr/bin/ts_calibrate
    fi
    #forbid libinput when using resistive touchscreens
    export QT_QPA_EGLFS_NO_LIBINPUT=1
    #enable tslib
    export QT_QPA_EGLFS_TSLIB=1
    export QT_QPA_FB_TSLIB=1
    export TSLIB_TSDEVICE="/dev/input/touchscreen0"
fi

# disable qt's audiosink if no audio present
ls -1 /dev/snd/pcm* > /dev/null 2>&1
if [ "$?" != "0" ]; then
    export QT_GSTREAMER_PLAYBIN_AUDIOSINK=fakesink
fi

export QT_QPA_PLATFORM=eglfs
export QT_QPA_EGLFS_KMS_CONFIG=/etc/eglfs_kms.config

# Common Debug Settings
#export QT_DEBUG_PLUGINS=1
#export QT_LOGGING_RULES=qt.qpa.*=true

if [ $# -eq 0 ]; then
    echo 'usage: qtLauncher <your_qt_application>'
else
    $@ #run the application
fi

qtLauncher <your_qt_application>