qtmobility/plugins/sensors/maemo6/maemo6magnetometer.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Wed, 23 Jun 2010 19:08:38 +0300
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Revision: 201023 Kit: 2010125
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "maemo6magnetometer.h"
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char const * const maemo6magnetometer::id("maemo6.magnetometer");
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bool maemo6magnetometer::m_initDone = false;
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maemo6magnetometer::maemo6magnetometer(QSensor *sensor)
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    : maemo6sensorbase(sensor)
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{
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    const QString sensorName = "magnetometersensor";
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    initSensor<MagnetometerSensorChannelInterface>(sensorName, m_initDone);
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    if (m_sensorInterface){
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        if (!(QObject::connect(m_sensorInterface, SIGNAL(dataAvailable(const MagneticField&)),
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                               this, SLOT(slotDataAvailable(const MagneticField&)))))
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            qWarning() << "Unable to connect "<< sensorName;
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    }
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    else
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        qWarning() << "Unable to initialize "<< sensorName;
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    setReading<QMagnetometerReading>(&m_reading);
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    // metadata
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    addDataRate(1, 130); // 43 Hz
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    addOutputRange(-0.000614, 0.000614, 0.0000003); // -600 ... 600 mikroteslas, 0.3 uT resolution
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    setDescription(QLatin1String("Measures magnetic flux density in teslas"));
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}
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void maemo6magnetometer::start(){
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    maemo6sensorbase::start();
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    QVariant v = sensor()->property("returnGeoValues");
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    m_isGeoMagnetometer =  v.isValid() && v.toBool()? true: false;
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}
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void maemo6magnetometer::slotDataAvailable(const MagneticField& data)
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{
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    if (m_isGeoMagnetometer){
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        m_reading.setX( 0.0000003 * data.x() );
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        m_reading.setY( 0.0000003 * data.y() );
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        m_reading.setZ( 0.0000003 * data.z() );
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        m_reading.setCalibrationLevel( ((float) data.level()) / 3.0 );
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    } else {
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        m_reading.setX( 0.0000003 * data.rx() );
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        m_reading.setY( 0.0000003 * data.ry() );
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        m_reading.setZ( 0.0000003 * data.rz() );
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        m_reading.setCalibrationLevel(1);
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    }
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    m_reading.setTimestamp(data.timestamp());
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    newReadingAvailable();
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}