Department of Computer Engineering

Dongguk University

Prof. Jin-Woo Jung (jwjung@dongguk.edu)Practice hour : 2008/11/14

8. 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 steps 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-free-

3.3.3.tar.gz

qt-embedded-free-3.3.3.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-free-3.3.3.tar.gz#mv qt-embedded-free-3.3.3 qte-3.3.3

export QTDIR=/Qt/qt-3.3.3 export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATHexport PATH=$PATH:$QTDIR/bin

# source /root/.bashrc# echo $PATH

Porting SDKDefault pointer is for mouse.

LDS4000’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 files,

“$QTDIR/src/embedded/qmouse_qws.h”,

“$QTDIR/src/embedded/qmouse_linuxtp_qws.cpp”.Refer to the file setting manual, “LDS2000_

보드에 _QT-e-3.3.3 포팅하기 .pdf”

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Porting SDKEdit the file “/Qt/qt-3.3.3/Makefile”

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Modifyall: 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? YesPixel depth? 16

Make the file

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# cd $QTDIR/configs#./configure -embedded arm -shared -debug -no-cups -continue -thread -qt-mouse-linuxtp

# make

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-3.3.3# cp –rf $QTDIR/lib /NFS/usr/local/qt-3.3.3

export QTDIR=/usr/local/qt-3.3.3 export LD_LIBRARY_PATH=$QTDIR/lib:$LD_LIBRARY_PATHexport QWS_DISPLAY=Transformed:Rot0export QWS_MOUSE_PROTO=linuxtp

Configure target board environment to use QT library

Test hello

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# 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.orgwww.corebell.co.kr

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