SocketCAN - Cannot load library

Damian7546

Hi ,
I am learning using Openstlinux-eglfs on embedded device.
In my device I turned on the CAN socked in device tree, and socket can0 is available in device:

can0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          UP RUNNING NOARP  MTU:16  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)
          Interrupt:60

Now I would like to access to can0 using qt libraries and, so I try run below example :

if (QCanBus::instance()->plugins().contains(QStringLiteral("socketcan"))) {
        QString errorString;
        QCanBusDevice *device = QCanBus::instance()->createDevice(QStringLiteral("socketcan"), QStringLiteral("can0"), &errorString);
        if (!device)
            qDebug() << device;
        else
            device->setConfigurationParameter(QCanBusDevice::BitRateKey, 1000000);
        device->connectDevice();
}
else
        qDebug() << "Plugin are not available";

But when I deploy my app I get errors:

qt.canbus.plugins.socketcan: Cannot load library socketcan: (socketcan: cannot open shared object file: No such file or directory)
qt.canbus.plugins.socketcan: Cannot load library libsocketcan, some functionality will not be available.
Cannot load library socketcan: (socketcan: cannot open shared object file: No such file or directory)
qt.canbus.plugins.socketcan: Function can_set_bitrate() is not available.
qt.canbus.plugins.socketcan: Cannot apply parameter: 4 with value: 1000000

Any idea what can be wrong ?

Damian7546

@JonB I not tried if the read and write works while the errors appears...

I installed below libraries on device :
IMAGE_INSTALL:append = " libsocketcan can-utils"

and now is without any errors.

JonB

@Damian7546
Cannot load library libsocketcan, some functionality will not be available
https://forum.qt.io/post/692971

Did you try read/write on the canbus? I remember seeing this issue and it still worked and was able to do everything I wanted to on the CANbus.

Read/write OK. Worked.

?

Damian7546

@JonB I not tried if the read and write works while the errors appears...

I installed below libraries on device :
IMAGE_INSTALL:append = " libsocketcan can-utils"

and now is without any errors.