QCanBus on Qt5.8

duarna

Hi!

When visiting the main page of Qt5.8, we can read "Fast & easy integration and communication with devices and peripherals using Qt Serial Bus API".

My problem is quite simple: my CAN connection works well with Qt5.7, but fails with Qt5.8.
I'm using a PEAK device, and I follow this example. It's a little bit different from the Qt5.7 version. e.g QCanBus::instance()->plugins() returns a QStringList in Qt5.8 while it returned a QByteArray in Qt5.7 but anyway, I modified my code to match with these new prototypes.

Here is a sample of my code:

 if(QCanBus::instance()->plugins().contains(QStringLiteral("peakcan")))
    {
        foreach (QString bus, listBus) //listBus contains usbbus0, usbbus1, usbbus2,...
        {
            device = QCanBus::instance()->createDevice("peakcan", bus);

            if(device!=nullptr)
            {
                // apply filters
                device->setConfigurationParameter(QCanBusDevice::BitRateKey, 500000);//500kbits/s
                device->setConfigurationParameter(QCanBusDevice::ReceiveOwnKey, false); //readonly
                device->setConfigurationParameter(QCanBusDevice::RawFilterKey, QVariant::fromValue(filterList));

                if(device->connectDevice()) /******returns false******/
                {
                    //blablabla
                }
            }

connectDevice() always returns false, and I really don't get why.
Any help would be appreciated, thank you in advance!

Arnaud

duarna

Ok, I finally used the peak lib instead of QCanBus, where it is possible to use the filters and much more options.

Thank you all!

SGaist

Hi,

I haven't used that module yet but did you try to print the value returned by QCanBusDevice::errorString ?

kuzulis

said in QCanBus on Qt5.8:

connectDevice() always returns false, and I really don't get why.

Did you read documentation? The PeakCAN still supports only one property as QCanBusDevice::BitRateKey!

duarna

Ok, I finally used the peak lib instead of QCanBus, where it is possible to use the filters and much more options.

Thank you all!