How to run CAN Bus example in QtCreator ?

imene

Hello,
I want to run CAN Bus example in QtCreator but it doesn't exist in QtCreator examples list !
https://stuff.mit.edu/afs/athena/software/texmaker_v5.0.2/qt57/doc/qtserialbus/qtserialbus-can-example.html

This is what i get when i implement it as a new project:

OS: Raspbian GNU/Linux 11 (bullseye) [linux version 5.15.53-v7+]
Qt Creator 4.14.1
Based on Qt 5.15.2 (GCC 10.2.1 20210110, 32 bit)

mpergand

Check you have serialbus added in your .pro

QT += serialbus widgets

I found the can example in:
Qt5.xx⁩ ▸ ⁨Examples⁩ ▸ ⁨Qt-5.xx⁩ ▸ ⁨serialbus⁩ ▸ ⁨can

imene

Hi @mpergand
QT += serialbus widgets doesn't exist in my .pro file should i uncomment line n°9 ? :

i didn't find serialbus example:

JonB

@imene
You have to add it yourself! E.g. put that QT += serialbus widgets as a line beneath the existing QT += ... one.
Oh and after doing that make sure you do a complete new qmake before proceeding to compile.

imene

Hi @JonB
i've made a mistake, i forget to past the right code of .pro from the site this is the right one contain QT += serialbus widgets :

Now i'm facing those issues "invalid initiazation of reference of type 'const QByteArray&' from expression of type 'const QString'":

JonB

@imene
I know nothing about this, but look at your line #199 (connectdialog.cpp, your code?). I see something like an attempt to use a QByteArray & to iterate through a QStringList?

mpergand

Seems you're using an old version, from the version in Qt 5.12, I see no usage of Q_FOREACH nor QByteArray in ConnectDialog.

It seems in the new version, it looks like that:

for (const QCanBusDeviceInfo &info : qAsConst(m_interfaces)) {

And @JonB guessing right, m_interfaces is a QList of QCanBusDeviceInfo

I suggest you to update to a newer version to avoid unnecessary headaches.

imene

Hi @mpergand i can't make an update it's already the newest version available under debian(bullseye) OS Qt 5.15.2 (GCC 10.2.1 20210110, 32 bit)

mpergand

@imene
You are using an incompatible version of the CAN example with Qt 5.15, because of that:
In Qt 5.6 QCanBus class

QList<QByteArray> plugins() const;

In Qt 5.15 :

QStringList QCanBus::plugins() const

The CAN example you are using is not the one provide with Qt 5.15 and you must use the right one otherwise it doesn't compile.

imene

Thanks @mpergand i'm gonna try to implement this example CAN Bus example | Qt Serial Bus 5.15.2 (https://code.qt.io/cgit/qt/qtserialbus.git/tree/examples/serialbus/can?h=5.15.2) i hope it works