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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Mobility Components.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 "n900lightsensor.h"
#include <QFile>
#include <QDebug>
char const * const n900lightsensor::id("n900.light");
char const * const n900lightsensor::filename("/sys/class/i2c-adapter/i2c-2/2-0029/lux");
n900lightsensor::n900lightsensor(QSensor *sensor)
: n900filebasedsensor(sensor)
{
setReading<QLightReading>(&m_reading);
// Sensor takes 12-400ms to complete one reading and is triggered by
// a read of the /sys file (no interrupt/timing loop/etc. is used).
addDataRate(1, 2);
setDescription(QLatin1String("tsl2563"));
sensor->setProperty("fieldOfView", 1); // very narrow field of view.
}
void n900lightsensor::start()
{
if (!QFile::exists(QLatin1String(filename)))
goto error;
n900filebasedsensor::start();
return;
error:
sensorStopped();
}
void n900lightsensor::poll()
{
FILE *fd = fopen(filename, "r");
if (!fd) return;
int lux;
int rs = fscanf(fd, "%i", &lux);
fclose(fd);
if (rs != 1) return;
if (m_reading.lux() != lux || m_reading.timestamp() == 0) {
m_reading.setTimestamp(getTimestamp());
m_reading.setLux(lux);
newReadingAvailable();
}
}
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