1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://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: http://www.gnu.org/copyleft/fdl.html.
** $QT_END_LICENSE$
**
****************************************************************************/
/*!
\page qtserialbus-tinycan-overview.html
\title Using TinyCAN Backend
\brief Overview of how to use the TinyCAN backend.
The TinyCAN backend encapsulates the low-level API to work with the
\l{http://www.mhs-elektronik.de/}{MHS Elektronik} CAN adapters.
\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("tinycan"))) {
// backend available
}
\endcode
Where \e tinycan is the backend name.
Next, a connection to a specific interface can be established:
\code
QCanBusDevice *device = QCanBus::instance()->createDevice(
QStringLiteral("tinycan"), QStringLiteral("channela"));
device->connectDevice();
\endcode
Where \e channela is the active CAN interface name. The TinyCAN backend
provides two interfaces, \e channela and \e channelb.
\note Only the USB adapters are currently supported by this backend.
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 new frames are available
for reading:
\code
QCanBusFrame frame = device->readFrame();
\endcode
TinyCAN 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, 1000000.
\endtable
*/
|
