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Diffstat (limited to 'plugins/sensors/blackberry/bbmagnetometer.cpp')
-rw-r--r-- | plugins/sensors/blackberry/bbmagnetometer.cpp | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/plugins/sensors/blackberry/bbmagnetometer.cpp b/plugins/sensors/blackberry/bbmagnetometer.cpp new file mode 100644 index 0000000000..d6d952ba8f --- /dev/null +++ b/plugins/sensors/blackberry/bbmagnetometer.cpp @@ -0,0 +1,90 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Research In Motion <blackberry-qt@qnx.com> +** Contact: http://www.qt-project.org/legal +** +** This file is part of the Qt Mobility Components. +** +** $QT_BEGIN_LICENSE:LGPL$ +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 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, Digia gives you certain additional +** rights. These rights are described in the Digia 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. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#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. + float x = convertValue(event.motion.dsp.x); + float y = convertValue(event.motion.dsp.y); + float z = convertValue(event.motion.dsp.z); + remapAxes(&x, &y, &z); + reading->setX(x); + reading->setY(y); + reading->setZ(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; +} |