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Diffstat (limited to 'src/plugins/sensors/blackberry/bbmagnetometer.cpp')
-rw-r--r-- | src/plugins/sensors/blackberry/bbmagnetometer.cpp | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/plugins/sensors/blackberry/bbmagnetometer.cpp b/src/plugins/sensors/blackberry/bbmagnetometer.cpp new file mode 100644 index 00000000..eed1497c --- /dev/null +++ b/src/plugins/sensors/blackberry/bbmagnetometer.cpp @@ -0,0 +1,86 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Research In Motion +** Contact: http://www.qt-project.org/ +** +** This file is part of the QtSensors module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 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 3.0 requirements will be met: +** http://www.gnu.org/copyleft/gpl.html. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include "bbmagnetometer.h" + +BbMagnetometer::BbMagnetometer(QSensor *sensor) + : BbSensorBackend<QMagnetometerReading>(devicePath(), SENSOR_TYPE_MAGNETOMETER, sensor) +{ + setDescription(QLatin1String("Magnetic flux density in Teslas (T)")); +} + +QString BbMagnetometer::devicePath() +{ + return QLatin1String("/dev/sensor/mag"); +} + +bool BbMagnetometer::updateReadingFromEvent(const sensor_event_t &event, QMagnetometerReading *reading) +{ + // TODO: In the future, support returnGeoValues here. Right now, /dev/sensors/mag has no + // geomagnatic mode, but will gain it in the future. + reading->setX(convertValue(event.motion.dsp.x)); + reading->setY(convertValue(event.motion.dsp.y)); + reading->setZ(convertValue(event.motion.dsp.z)); + + const bool returnGeoValues = sensor()->property("returnGeoValues").toBool(); + if (returnGeoValues) { + switch (event.accuracy) { + case SENSOR_ACCURACY_UNRELIABLE: reading->setCalibrationLevel(0.0f); break; + case SENSOR_ACCURACY_LOW: reading->setCalibrationLevel(0.1f); break; + + // We determined that MEDIUM should map to 1.0, because existing code samples + // show users should pop a calibration screen when seeing < 1.0. The MEDIUM accuracy + // is actually good enough not to require calibration, so we don't want to make it seem + // like it is required artificially. + case SENSOR_ACCURACY_MEDIUM: reading->setCalibrationLevel(1.0f); break; + case SENSOR_ACCURACY_HIGH: reading->setCalibrationLevel(1.0f); break; + } + } else { + reading->setCalibrationLevel(1.0f); + } + + return true; +} + +qreal BbMagnetometer::convertValue(float bbValueInMicroTesla) +{ + // Convert from microtesla to tesla + return bbValueInMicroTesla * 1.0e-6; +} |