1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** 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.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
// Internal Headers
#include "accelerometersym.h"
#include <sensrvgeneralproperties.h>
#define GRAVITATION_CONSTANT 9.812865328 //According to wikipedia link http://en.wikipedia.org/wiki/Standard_gravity
/**
* set the id of the accelerometer sensor
*/
char const * const CAccelerometerSensorSym::id("sym.accelerometer");
/**
* Factory function, this is used to create the accelerometer object
* @return CAccelerometerSensorSym if successful, leaves on failure
*/
CAccelerometerSensorSym* CAccelerometerSensorSym::NewL(QSensor *sensor)
{
CAccelerometerSensorSym* self = new (ELeave) CAccelerometerSensorSym(sensor);
CleanupStack::PushL(self);
self->ConstructL();
CleanupStack::Pop();
return self;
}
/**
* Destructor
* Closes the backend resources
*/
CAccelerometerSensorSym::~CAccelerometerSensorSym()
{
// Release the backend resources
Close();
}
/**
* Default constructor
*/
CAccelerometerSensorSym::CAccelerometerSensorSym(QSensor *sensor):CSensorBackendSym(sensor),
iScaleRange(0),
iUnit(0)
{
setReading<QAccelerometerReading>(&iReading);
iBackendData.iSensorType = KSensrvChannelTypeIdAccelerometerXYZAxisData;
//Disable property listening
SetListening(ETrue, EFalse);
}
void CAccelerometerSensorSym::start()
{
TSensrvProperty dataFormatProperty;
TInt err;
CSensorBackendSym::start();
TRAP(err, iBackendData.iSensorChannel->GetPropertyL(KSensrvPropIdChannelDataFormat, ESensrvSingleProperty, dataFormatProperty));
if(err == KErrNone)
{
TSensrvProperty scaleRangeProperty;
TRAP(err, iBackendData.iSensorChannel->GetPropertyL(KSensrvPropIdScaledRange, KSensrvItemIndexNone, scaleRangeProperty));
if(err == KErrNone)
{
if(scaleRangeProperty.GetArrayIndex() == ESensrvSingleProperty)
{
if(scaleRangeProperty.PropertyType() == ESensrvIntProperty)
{
scaleRangeProperty.GetMaxValue(iScaleRange);
}
else if(scaleRangeProperty.PropertyType() == ESensrvRealProperty)
{
TReal realScale;
scaleRangeProperty.GetMaxValue(realScale);
iScaleRange = realScale;
}
}
else if(scaleRangeProperty.GetArrayIndex() == ESensrvArrayPropertyInfo)
{
TInt index;
if(scaleRangeProperty.PropertyType() == ESensrvIntProperty)
{
scaleRangeProperty.GetValue(index);
}
else if(scaleRangeProperty.PropertyType() == ESensrvRealProperty)
{
TReal realIndex;
scaleRangeProperty.GetValue(realIndex);
index = realIndex;
}
TRAP(err, iBackendData.iSensorChannel->GetPropertyL(KSensrvPropIdScaledRange, KSensrvItemIndexNone, index, scaleRangeProperty));
if(err == KErrNone)
{
if(scaleRangeProperty.PropertyType() == ESensrvIntProperty)
{
scaleRangeProperty.GetMaxValue(iScaleRange);
}
else if(scaleRangeProperty.PropertyType() == ESensrvRealProperty)
{
TReal realScaleRange;
scaleRangeProperty.GetMaxValue(realScaleRange);
iScaleRange = realScaleRange;
}
}
}
}
}
}
/*
* DataReceived is used to retrieve the sensor reading from sensor server
* It is implemented here to handle accelerometer sensor specific
* reading data and provides conversion and utility code
*/
void CAccelerometerSensorSym::DataReceived(CSensrvChannel &aChannel, TInt aCount, TInt /*aDataLost*/)
{
ProcessData(aChannel, aCount, iData);
}
void CAccelerometerSensorSym::ProcessReading()
{
TReal x = iData.iAxisX;
TReal y = iData.iAxisY;
TReal z = iData.iAxisZ;
//Converting unit to m/s^2
if(iScaleRange && iUnit == ESensevChannelUnitAcceleration)
{
qoutputrangelist rangeList = sensor()->outputRanges();
int outputRange = sensor()->outputRange();
if (outputRange == -1)
outputRange = 0;
TReal maxValue = rangeList[outputRange].maximum;
x = (x/iScaleRange) * maxValue;
y = (y/iScaleRange) * maxValue;
z = (z/iScaleRange) * maxValue;
}
else if(iUnit == ESensrvChannelUnitGravityConstant)
{
//conversion is yet to done
}
// Get a lock on the reading data
iBackendData.iReadingLock.Wait();
// Set qt mobility accelerometer reading with data from sensor server
iReading.setX(x);
iReading.setY(y);
iReading.setZ(z);
// Set the timestamp
iReading.setTimestamp(iData.iTimeStamp.Int64());
// Release the lock
iBackendData.iReadingLock.Signal();
// Notify that a reading is available
newReadingAvailable();
}
/**
* Second phase constructor
* Initialize the backend resources
*/
void CAccelerometerSensorSym::ConstructL()
{
//Initialize the backend resources
InitializeL();
TInt err;
TSensrvProperty unitProperty;
TRAP(err, iBackendData.iSensorChannel->GetPropertyL(KSensrvPropIdChannelUnit, ESensrvSingleProperty, unitProperty));
if(err == KErrNone)
{
unitProperty.GetValue(iUnit);
}
}
|
