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/****************************************************************************
**
** Copyright (C) 2016 Andre Hartmann <aha_1980@gmx.de>
** Contact: https://www.qt.io/licensing/
**
** This file is part of the documentation of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:FDL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Free Documentation License Usage
** Alternatively, this file may be used under the terms of the GNU Free
** Documentation License version 1.3 as published by the Free Software
** Foundation and appearing in the file included in the packaging of
** this file. Please review the following information to ensure
** the GNU Free Documentation License version 1.3 requirements
** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\page qtserialbus-SystecCAN-overview.html
\title Using SystecCAN Backend
\brief Overview of how to use the SystecCAN backend.
The SystecCAN backend encapsulates the low-level API to work with the
\l{http://www.systec-electronic.com/}{SYS TEC} CAN adapters.
This plugin requires the SYS TEC CAN device drivers and the usbcan32.dll
(usbcan64.dll for 64 bit builds).
\section1 Creating CAN Bus Devices
At first it is necessary to check that QCanBus provides the desired backend:
\code
if (QCanBus::instance()->plugins().contains(QStringLiteral("systeccan"))) {
// backend available
}
\endcode
Where \e systeccan is the backend name.
Next, a connection to a specific interface can be established:
\code
QCanBusDevice *device = QCanBus::instance()->createDevice(
QStringLiteral("systeccan"), QStringLiteral("can0.0"));
device->connectDevice();
\endcode
Where, \e can0.0 is the active CAN interface name (interface 0, channel 0).
The SystecCAN backend supports 64 USB interfaces (so called modules) from
\e can0.0 to \e can63.1. Each module can have one or two channels, they can
be accessed by the index canX.0 or canX.1.
\note SYS TEC also provides 8 or 16 channel CAN interfaces. These units
consist of an USB hub and multiple two-channel modules internally.
The device is now open for writing and reading CAN frames:
\code
QCanBusFrame frame;
frame.setFrameId(8);
QByteArray payload("A36E");
frame.setPayload(payload);
device->writeFrame(frame);
\endcode
The reading can be done using the \l {QCanBusDevice::}{readFrame()} method.
The \l {QCanBusDevice::}{framesReceived()} signal is emitted when at least
one new frame is available for reading:
\code
QCanBusFrame frame = device->readFrame();
\endcode
SystecCAN supports the following configurations that can be controlled through
\l {QCanBusDevice::}{setConfigurationParameter()}:
\table
\header
\li Configuration parameter key
\li Description
\row
\li QCanBusDevice::BitRateKey
\li Determines the bit rate of the CAN bus connection. The following bit rates
are supported: 10000, 20000, 50000, 100000, 125000, 250000, 500000, 800000,
and 1000000. Note that this configuration parameter can only be adjusted
while the QCanBusDevice is not connected.
\row
\li QCanBusDevice::ReceiveOwnKey
\li The reception of CAN frames on the same channel that was sending the CAN frame
is disabled by default. If this option is enabled, the therefore received frames
are marked with QCanBusFrame::hasLocalEcho()
\endtable
*/
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