Synopsis¶

Methods¶

def availableDevices()
def createDevice()
def plugins()

Static functions¶

def instance()

Note

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Detailed Description¶

QCanBus loads Qt CAN Bus plugins at runtime. The ownership of serial bus plugins is transferred to the loader.

availableDevices()¶

Return type:: tuple

Returns the available devices for all plugins, i.e. all available CAN interfaces.

In case of failure, the optional parameter errorMessage returns a textual error description.

Note

Some plugins might not or only partially support this function.

See also

createDevice()

The function returns a tuple of (device_list, error_string).

availableDevices(plugin)

Parameters:: plugin – str
Return type:: tuple

Returns the available interfaces for plugin. In case of failure, the optional parameter errorMessage returns a textual error description.

Note

Some plugins might not or only partially support this function.

For example, the following call returns a list of all available SocketCAN interfaces (which can be used for createDevice() ):

QString errorString;
const QList<QCanBusDeviceInfo> devices = QCanBus::instance()->availableDevices(
    QStringLiteral("socketcan"), &errorString);
if (!errorString.isEmpty())
    qDebug() << errorString;

See also

createDevice()

The function returns a tuple of (device_list, error_string).

createDevice(plugin, interfaceName)¶

Parameters:

plugin – str
interfaceName – str

Return type:

tuple

Creates a CAN bus device. plugin is the name of the plugin as returned by the plugins() method. interfaceName is the CAN bus interface name. In case of failure, the optional parameter errorMessage returns a textual error description.

Ownership of the returned plugin is transferred to the caller. Returns nullptr if no suitable device can be found.

For example, the following call would connect to the SocketCAN interface vcan0:

QString errorString;
QCanBusDevice *device = QCanBus::instance()->createDevice(
    QStringLiteral("socketcan"), QStringLiteral("vcan0"), &errorString);
if (!device)
    qDebug() << errorString;
else
    device->connectDevice();

Note

The interfaceName is plugin-dependent. See the corresponding plugin documentation for more information: CAN Bus Plugins . To get a list of available interfaces, availableDevices() can be used.