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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the tools applications of the QtSerialBus module.
**
** $QT_BEGIN_LICENSE:LGPL3$
** 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 Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPLv3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or later as published by the Free
** Software Foundation and appearing in the file LICENSE.GPL included in
** the packaging of this file. Please review the following information to
** ensure the GNU General Public License version 2.0 requirements will be
** met: http://www.gnu.org/licenses/gpl-2.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "canbusutil.h"
CanBusUtil::CanBusUtil(QTextStream &output, QCoreApplication &app, QObject *parent)
: QObject(parent),
m_canBus(QCanBus::instance()),
m_output(output),
m_app(app),
m_readTask(new ReadTask(output, this))
{
}
void CanBusUtil::setShowTimeStamp(bool showTimeStamp)
{
m_readTask->setShowTimeStamp(showTimeStamp);
}
void CanBusUtil::setShowFdFlags(bool showFdFlags)
{
m_readTask->setShowFdFlags(showFdFlags);
}
bool CanBusUtil::start(const QString &pluginName, const QString &deviceName, const QString &data)
{
if (!m_canBus) {
m_output << "Unable to create QCanBus" << endl;
return false;
}
m_pluginName = pluginName;
m_deviceName = deviceName;
m_data = data;
m_listening = data.isEmpty();
if (!connectCanDevice())
return false;
if (m_listening) {
if (m_readTask->isShowFdFlags())
m_canDevice->setConfigurationParameter(QCanBusDevice::CanFdKey, true);
connect(m_canDevice.data(), &QCanBusDevice::framesReceived, m_readTask, &ReadTask::checkMessages);
} else {
if (!sendData())
return false;
QTimer::singleShot(0, &m_app, SLOT(quit()));
}
return true;
}
void CanBusUtil::printPlugins()
{
const QStringList plugins = m_canBus->plugins();
for (int i = 0; i < plugins.size(); i++)
m_output << plugins.at(i) << endl;
}
int CanBusUtil::printDevices(const QString &pluginName)
{
QString errorMessage;
const QList<QCanBusDeviceInfo> devices = m_canBus->availableDevices(pluginName, &errorMessage);
if (!errorMessage.isEmpty()) {
m_output << "Error: " << errorMessage << endl;
return 1;
}
for (const QCanBusDeviceInfo &info : devices)
m_output << info.name() << endl;
return 0;
}
bool CanBusUtil::parseDataField(qint32 &id, QString &payload)
{
int hashMarkPos = m_data.indexOf('#');
if (hashMarkPos < 0) {
m_output << "Data field invalid: No hash mark found!" << endl;
return false;
}
id = m_data.left(hashMarkPos).toInt(nullptr, 16);
payload = m_data.right(m_data.length() - hashMarkPos - 1);
return true;
}
bool CanBusUtil::setFrameFromPayload(QString payload, QCanBusFrame *frame)
{
if (!payload.isEmpty() && payload.at(0).toUpper() == 'R') {
bool validPayloadLength = false;
frame->setFrameType(QCanBusFrame::RemoteRequestFrame);
if (payload.size() == 1) { // payload = "R"
validPayloadLength = true;
} else if (payload.size() > 1) { // payload = "R8"
payload = payload.mid(1);
int rtrFrameLength = payload.toInt(&validPayloadLength);
if (validPayloadLength && rtrFrameLength >= 0 && rtrFrameLength <= 8) {
frame->setPayload(QByteArray(rtrFrameLength, 0));
} else if (validPayloadLength) {
m_output << "The length must be between 0 and 8 (including)." << endl;
validPayloadLength = false;
}
}
if (!validPayloadLength) {
m_output << "Data field invalid: RTR data frame length not specified/valid." << endl;
}
return validPayloadLength;
} else if (!payload.isEmpty() && payload.at(0) == '#') {
frame->setFlexibleDataRateFormat(true);
payload = payload.mid(1);
}
const QRegularExpression re(QStringLiteral("^[0-9A-Fa-f]*$"));
if (!re.match(payload).hasMatch()) {
m_output << "Data field invalid: Only hex numbers allowed." << endl;
return false;
}
if (payload.size() % 2 != 0) {
if (frame->hasFlexibleDataRateFormat()) {
enum { BitrateSwitchFlag = 1, ErrorStateIndicatorFlag = 2 };
const int flags = payload.left(1).toInt(nullptr, 16);
frame->setBitrateSwitch(flags & BitrateSwitchFlag);
frame->setErrorStateIndicator(flags & ErrorStateIndicatorFlag);
payload.remove(0, 1);
} else {
m_output << "Data field invalid: Size is not multiple of two." << endl;
return false;
}
}
QByteArray bytes = QByteArray::fromHex(payload.toLatin1());
const int maxSize = frame->hasFlexibleDataRateFormat() ? 64 : 8;
if (bytes.size() > maxSize) {
m_output << "Warning: Truncating payload at max. size of " << maxSize << " bytes." << endl;
bytes.truncate(maxSize);
}
frame->setPayload(bytes);
return true;
}
bool CanBusUtil::connectCanDevice()
{
if (!m_canBus->plugins().contains(m_pluginName)) {
m_output << "Could not find suitable plugin." << endl;
m_output << "Available plugins:" << endl;
printPlugins();
return false;
}
m_canDevice.reset(m_canBus->createDevice(m_pluginName, m_deviceName));
if (!m_canDevice) {
m_output << "Unable to create QCanBusDevice with device name: " << m_deviceName << endl;
return false;
}
connect(m_canDevice.data(), &QCanBusDevice::errorOccurred, m_readTask, &ReadTask::receiveError);
if (!m_canDevice->connectDevice()) {
m_output << "Unable to connect QCanBusDevice with device name: " << m_deviceName << endl;
return false;
}
return true;
}
bool CanBusUtil::sendData()
{
qint32 id;
QString payload;
QCanBusFrame frame;
if (parseDataField(id, payload) == false)
return false;
if (setFrameFromPayload(payload, &frame) == false)
return false;
if (id < 0 || id > 0x1FFFFFFF) { // 29 bits
id = 0x1FFFFFFF;
m_output << "Warning! Id does not fit into Extended Frame Format, setting id to: " << id << endl;
}
frame.setFrameId(id);
if (frame.hasFlexibleDataRateFormat())
m_canDevice->setConfigurationParameter(QCanBusDevice::CanFdKey, true);
return m_canDevice->writeFrame(frame);
}
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