Can bus using Peak Can

Giampietro

Hello, I need to use Pcan basic for comunicate on can bus.
I download the pcan-basic.zip from peak site, but I don't know how use it in QT.

I need to include pcan dll in the project (which files dll, lib, h should I use??)
How include these files il a QT project ??

I am using windows 10 and Qt 5.11.1 (MSVC 2015, 32 bit)

Thankyou

Christian Ehrlicher

There is no difference using an external library in a Qt project or a plain C++ project. So I don't see a Qt problem here. Afaik the library brings some example on how to access it.

aha_1980

Hi @Giampietro,

have you already seen Qt CAN bus?

The Peak plugin is described here. In short - you need the device drivers and the DLL to run your program.

Regards.

Giampietro

Hello all,
I've already saw Qt CAN Bus
And I create a widget project fon comunication on can bus.
I imported the sample in the link pages :

In the .pro file I used: QT += core gui widgets serialbus

in the form cpp file I used :
#include <QCanBus>

and the code is :
if (QCanBus::instance()->plugins().contains(QStringLiteral("peakcan"))) {
// plugin available
qDebug() << "plugin "peakcan" available ";
}

QString errorString;
QCanBusDevice *device = QCanBus::instance()->createDevice(
    QStringLiteral("peakcan"), QStringLiteral("usb0"), &errorString);
if (!device) {
    // Error handling goes here
    qDebug() << errorString;
} else {
    device->connectDevice();
}

as illustrated into web page.
When I run the project I find into ouput this :

plugin "peakcan" available
qt.canbus.plugins.peakcan: Cannot load library pcanbasic: Impossibile trovare il modulo specificato.
"Cannot load library pcanbasic: Impossibile trovare il modulo specificato."

I find the pcanbasic.dll in peak website (download pcan-basic.zip) but I don't understand which files .h include in project.
there are header pcanbasic.h files for C#·, C++_Builder, C++_CLR, C++_MFC. which should I use??

So, I understand that pcan basic is missing from the project: How import it with the relative .h ?

I used also sample find here : CAN Bus example
But I have the same answer in output : Cannot load library pcanbasic.

How use pcanbasic.dll??

Thankyou for help

aha_1980

Hi @Giampietro,

I'd suggest you to try with the CAN bus example first.

Have you installed the Peak device drivers? I.e. do you have the hardware successfully installed in device manager?
QtSerialBus loads the pcanbasic.dll at runtime. So either copy it to the same folder your executable resides, or make sure it is in a directory which is contained in the PATH environment variable.

That should be all you need, no header files, no lib files etc.

Regards

Giampietro

Hello aha_1980,
I find the solution :

the problem was the wrong drivers:
I used 4.1.4.247 version driver. With this, the problem is present.
Now I use a 4.0.18.96 driver version (an older version), and the problem is solved.
My test application and also CAN bus example works fine.

Thnkyou all for help!.

aha_1980

Hi @Giampietro

Glad you figured it out. So please mark this topic as SOLVED now. Thanks!

alpacino

hi Giampietro
i have the same issue..
if i use the example of CAN Bus example in qt , do i need to add the dll to the app ? if the response is yes which files.h I should include and how I add the library ??
and thank u

aha_1980

@alpacino

please see my post above:

https://forum.qt.io/topic/94197/can-bus-using-peak-can/5

Regards