[SOLVED] QT Serial Communication with Beaglebone

[seiko]

Are you sure from install qt 4.8 ?
Because the error still exist "QElapsedTimer"

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qserialport_unix.cpp:58:34: error: QtCore/qelapsedtimer.h: No such file or directory
qserialport_unix.cpp: In member function ‘bool QSerialPortPrivate::waitForReadyRead(int)’:
qserialport_unix.cpp:427: error: ‘QElapsedTimer’ was not declared in this scope
@

By enter follow command you should see what's your qt version

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/opt/qt/bin/qmake -v && /opt/qt/bin/moc -v
@

[Tilapia21]

Here's the result :

QMake version 2.01a
Using Qt version 4.8.2 in /opt/qt/lib

[seiko]

first of all check qt doc link "check qt doc link...":http://qt-project.org/wiki/QtSerialPort and re-extract to get a clean dir of QtSerialPort
because what I see here from your log
looks like duplicated qmake or you moc version isn't the same as qmake
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/home/julian/Downloads/qt-qtserialport/src/serialport/moc_qserialport.cpp:14:2: error: #error “This file was generated using the moc from 4.6.3. It”
/home/julian/Downloads/qt-qtserialport/src/serialport/moc_qserialport.cpp:15:2: error: #error “cannot be used with the include files from this version of Qt.”
/home/julian/Downloads/qt-qtserialport/src/serialport/moc_qserialport.cpp:16:2:
@
check your moc version
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/opt/qt/bin/moc -v
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Also your qtopia using old qt flags
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WARNING: /usr/local/angstrom/arm/arm-angstrom-linux-gnueabi/usr/share/qtopia/mkspecs/common/g++.conf:44: Variable QMAKE_RPATH is deprecated; use QMAKE_LFLAGS_RPATH instead.
WARNING: /usr/local/angstrom/arm/arm-angstrom-linux-
@

[Tilapia21]

Qt Meta Object Compiler version 63 (Qt 4.8.2)

Would it help if I uninstall qt4-emebedded ?

I think it has worked this time.
So I downloaded qt-qtserialport once more and extracted it.
Then :
@cd ~/Downloads/qt-qtserialport
/opt/qt/bin/qmake ~/Downloads/qt-qtserialport/qtserialport.pro
make
sudo make install
@
and it finished without errors. I'm gonna check how it's going in QTCreator.

[Tilapia21]

Ok, last step would be having it in QtCreator obviously.

When I add :
#include <QtSerialPort/QSerialPort>
#include <QtSerialPort/QSerialInfo>
and try to build, it says :
No such file or directory.
Another parameter to configure ?

[seiko]

Because you forget to add
@
CONFIG += serialport
@
in your .pro file

Note: CONFIG += serialport must be the first or second line in your .pro file.

[seiko]

Would it help if I uninstall qt4-emebedded ?
I don't think so , If you upgraded your qt version to 4.8 so your qt4-emebedded gonna upgraded too

[quote author="Tilapia21" date="1391776804"]
I think it has worked this time.
So I downloaded qt-qtserialport once more and extracted it.
Then :
@cd ~/Downloads/qt-qtserialport
/opt/qt/bin/qmake ~/Downloads/qt-qtserialport/qtserialport.pro
make
sudo make install
@
and it finished without errors. I'm gonna check how it's going in QTCreator.[/quote]

Here was my guess you used qmake version 4.6.3 then after you upgrade
you used qmake version 4.8.2 without clean the old moc files and MakeFile

so I think everything gonna work fine with you this time

[Tilapia21]

Sorry, I forgot to mention I had done it too.

@QT += core gui
CONFIG += serialport
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = QTTest2
target.files = QTTest2
target.path = /home/root

INSTALLS += target
TEMPLATE = app

SOURCES += main.cpp
mainwindow.cpp

HEADERS += mainwindow.h

FORMS += mainwindow.ui@

[seiko]

Well in that case qt creator has different qmake
since you had been upgraded your qt you have to add a new qt kit
for /opt/qt/bin/qmake and make it a default qt for your project

[Tilapia21]

You're right it had gone back to qt 4.6.3 qmake.
All errors have disappeared.
I'm gonne make a small test program and mark this subject as solved if everything goes fine.

Thank you for your help ! Great community !
Special thanks to you seiko !

[Tilapia21]

Ok, just a last problem then I think I'll be ready to fly on my own.

I compiled the "terminal" example and it was displayed on the beaglebone screen. But I wanted to change the mainWindow resolution cause the example was really small and I should have made sth wrong cause now I get this error :

16:06:32: Running steps for project terminal...
16:06:32: Configuration unchanged, skipping qmake step.
16:06:32: Starting: "/usr/bin/make"
arm-angstrom-linux-gnueabi-g++ -Wl,-rpath-link,/opt/qt/lib -o terminal main.o mainwindow.o settingsdialog.o console.o moc_mainwindow.o moc_settingsdialog.o moc_console.o qrc_terminal.o -L/home/julian/Downloads/qt-qtserialport/src/serialport -L/usr/local/angstrom/arm/arm-angstrom-linux-gnueabi//usr/lib -lglib-2.0 -lQtSerialPort -lQtGui -lQtCore -lpthread
/usr/local/angstrom/arm/lib/gcc/arm-angstrom-linux-gnueabi/4.3.3/../../../../arm-angstrom-linux-gnueabi/bin/ld: cannot find -lQtGui
collect2: ld returned 1 exit status
make: *** [terminal] Error 1
16:06:32: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project terminal (kit: BeagleboneKit)
When executing step 'Make'
16:06:32: Elapsed time: 00:00.

[seiko]

@
/usr/local/angstrom/arm/lib/gcc/arm-angstrom-linux-gnueabi/4.3.3/../../../../arm-angstrom-linux-gnueabi/bin/ld: cannot find -lQtGui
collect2: ld returned 1 exit status
@
the linker can't find QtGui because in follow directory you should have
QT library and I don't why qt qmake didn't even provide the path of lib maybe you should recall qmake
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/usr/local/angstrom/arm/arm-angstrom-linux-gnueabi/usr/lib
@