Department of Computer EngineeringDongguk University.

Prof. Jin-Woo Jungjwjung@dongguk.edu

Qt / Embedded

What is the Qt?

Qt is a cross-platform application development framework, widely used for the development of GUI programs (in which case it is known as a Widget toolkit).

Qt is used for developing non-GUI programs such as console tools and servers.

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Varieties

Qt/X11 — Qt for X Window System (Unix / Linux) Qt/Mac — Qt for Apple Mac OS X .Qt/Windows — Qt for Microsoft WindowsQt/Embedded — Qt for embedded platforms

(PDA, etc ...)Qt Jambi — Qt for Java

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What is the Qt?

Qt: GUI libraryBased on X-window

Qt/EmbeddedBased on Frame Buffer which is resource of kernel

Frame BufferVirtual buffer for graphic hardwareSome graphic cards have physical hardware for

frame bufferSome graphic cards have application for frame

buffer

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What is the Qt?

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The characteristic of Qt/Embedded

650KB ~ 5MB according to options.providing various platforms.providing an environment that is compatible with the

source level of Qt/X11, Qt/Windows, and Qt/MAC.it is possible that applications are concurrently

executed.direct video frame buffer access.providing TrueType and BDF(Bitmap Distribution

Format)providing multi-language, UNICODE, and

globalizationopen source.

Qt/Embedded vs Qt/X11

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Qt/Embedded Install Download SDK Port host environment to use Qt library Porting SDK

Configure SDK source files embedded hardware environmentCompile SDKConfirm porting

Configure target kernel compile configuration Install tmake

Download SDK Configure host environment to use tmake Confirm porting

Configure target board environment to use Qt library

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Download SDK

Homepage of Trolltechhttp://www.trolltech.com

FTP server of Trolltechftp://ftp.trolltech.com/qt/source/qt-embedded-2.3.2.tar.gz

qt-embedded-2.3.2.tar.gzDownload and copy to the directory, “/Qt/”

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Porting SDKRelease compression

Edit the file “/root/.bashrc”

Refresh the path

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# mkdir /Qt# cd /Qt # tar -xzvf qt-embedded-2.3.2.tar.gz

export QTDIR=/Qt/qt-2.3.2 export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATHexport PATH=$PATH:$QTDIR/bin

# source /root/.bashrc# echo $PATH

Porting SDKDefault pointer is for mouse.

LDS2000’s LCD is touch screen.The parameter from kernel to application is

must be touch screen, not mouse values.

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Porting SDKEdit the file “/Qt/qt-2.3.2/src/kernel

/qwsmouse_qws.cpp”

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Porting SDKEdit the file “/Qt/qt-2.3.2/src/kernel

/qwsmouse_qws.cpp”

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Porting SDKEdit the file “/Qt/qt-2.3.2/configs/linux-arm-g+

+-shared”

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-> 9 번째 줄

-> 61 번째 줄

Porting SDKEdit the file “/Qt/qt-2.3.2/Makefile”

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Modify#all: symlinks src-moc src-mt sub-src sub-tools sub-tutorial sub-examples

all: symlinks src-moc src-mt sub-src sub-tools #sub-tutorial sub-examples

Line #11

Porting SDKRun Makefile

License? YesFeature configuration? 5. Everything(5MB)Pixel depth? 16Frame Buffer support? Yes

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# cd $QTDIR/configs# ./configure –xplatform linux-arm-g++-shared

Porting SDK Using the command, “ls -al”, in the directory,

“$QTDIR/lib ”

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Configure target kernel compile configuration Include touch screen driver(ADS7853) to kernel

compile option

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Install tmake - Download

Homepage of Trolltechhttp://www.trolltech.com

FTP server of Trolltechftp://ftp.trolltech.com/freebies/tmake/tmake-

1.8.tar.gz

tmake-1.8.tar.gzDownload and copy to the directory, “/Qt/”

Install tmake - Configure host environment

Release compression

Edit the file “/root/.bashrc”

Refresh the path

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# tar -xzf tmake-1.8.tar.gz

export TMAKEPATH=/Qt/tmake-1.8/lib/qws/linux-arm-g++ export PATH=$PATH:/Qt/tmake-1.8/bin

# source /root/.bashrc# echo $PATH

Install tmake - Confirm porting “cat $QTDIR/examples/hello/hello.pro”

TEMPLATE: project type (app, lib, subdirs)DEPENDPATH: path of library files

Refer the file “~/tmake-1.8/doc/tmake_ref.html”

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Install tmake - Confirm porting

Run tmake (-o option)

progen programGenerage .pro file (-o option)header files and source files needed

include all files in current directory

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# cd $QTDIR/examples/hello# tmake -o Makefile hello.pro

# progen -o hello2.pro hello.h hello.cpp main.cpp

# progen -o hello3.pro

Configure target board environment to use QT library

Copy Qt/Embedded library & font.

Edit the file “/NFS/.bashrc”

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# mkdir /NFS/usr/local/qt-2.3.2# cp –rf $QTDIR/lib /NFS/usr/local/qt-2.3.2

export QTDIR=/usr/local/qt-2.3.2 export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATHexport QWS_DISPLAY=Transformed:Rot0export QWS_MOUSE_PROTO=TPanel:/dev/ts

Configure target board environment to use QT library

Edit the file “/NFS/etc/inittab”not to execute tiny-X

Test hello

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#x:5:respawn:/etc/X11/prefdm –nodaemon (# 을 삭제 하세요 .)

# cd $QTDIR/examples/hello# make# cp -rf hello /NFS

[root@192.168.0.12 /]$ source /.bashrc[root@192.168.0.12 /]$ /hello -qws

Reference

www.wikipedia.org

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