QCanBus 類

The QCanBus class handles registration and creation of bus plugins. 更多...

頭：	#include <QCanBus>
qmake:	QT += serialbus
Since:	Qt 5.8
繼承：	QObject

公共函數

QList<QCanBusDeviceInfo>	availableDevices (const QString & plugin , QString * errorMessage = nullptr) const
QCanBusDevice *	createDevice (const QString & plugin , const QString & interfaceName , QString * errorMessage = nullptr) const
QStringList	plugins () const

31 公共函數繼承自 QObject

靜態公共成員

QCanBus *	instance ()
const QMetaObject	staticMetaObject

9 靜態公共成員繼承自 QObject

額外繼承成員

1 特性繼承自 QObject
1 公共槽繼承自 QObject
2 信號繼承自 QObject
9 保護函數繼承自 QObject

詳細描述

The QCanBus class handles registration and creation of bus plugins.

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

成員函數文檔編製

QList < QCanBusDeviceInfo > QCanBus:: availableDevices (const QString & plugin , QString * errorMessage = nullptr) const

返迴可用接口，為 plugin . In case of failure, the optional parameter errorMessage returns a textual error description.

注意： 某些插件可能不支持 (或僅部分支持) 此函數。

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;

該函數在 Qt 5.9 引入。

另請參閱 createDevice ().

QCanBusDevice QCanBus:: createDevice (const QString & plugin* , const QString & interfaceName , QString * errorMessage = nullptr) const

Creates a CAN bus device. plugin is the name of the plugin as returned by the plugins () 方法。 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();

注意： The interfaceName is plugin-dependent. See the corresponding plugin documentation for more information: CAN 總綫插件 . To get a list of available interfaces, availableDevices () 可以使用。

另請參閱 availableDevices ().

`[static]` QCanBus *QCanBus:: instance ()

返迴指針指嚮 QCanBus 類。對象會被加載 (若有必要)。 QCanBus 使用 Singleton (單例) 設計模式。

QStringList QCanBus:: plugins () const

返迴所有已加載插件的標識符列錶。

內容