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    41 //Symbian

    42 #include <e32std.h>

    43 #include <rrsensorapi.h>

    44 

    45 // Local

    46 #include "qs60sensorapiaccelerometer.h"

    47 

    48 // Constants

    49 const int KAccelerometerSensorUID = 0x10273024;

    50 

    51 const char *QS60SensorApiAccelerometer::id("s60sensorapi.accelerometer");

    52 

    53 QS60SensorApiAccelerometer::QS60SensorApiAccelerometer(QSensor *sensor)

    54     : QSensorBackend(sensor)

    55     , m_nativeSensor(NULL)

    56     , m_sampleFactor(0.0f)

    57 {

    58     TRAPD(err, findAndCreateNativeSensorL());

    59     if(err != KErrNone) {

    60         sensorStopped();

    61         sensorError(err);

    62     }

    63     

    64     setReading<QAccelerometerReading>(&m_reading);

    65     

    66     // http://www.st.com/stonline/products/literature/ds/12726/lis302dl.pdf

    67     // That 3D accelerometer inside N95 , N93i or N82 is from STMicroelectronics (type LIS302DL).

    68     // http://wiki.forum.nokia.com/index.php/Nokia_Sensor_APIs.

    69     // Sensor is set to 100Hz 2G mode and no public interface to switch it to 8G

    70     

    71     // 2G - mode

    72     addDataRate(100, 100);

    73     sensor->setDataRate(100);

    74     addOutputRange(-22.418, 22.418, 0.17651);

    75     setDescription(QLatin1String("lis302dl"));

    76     

    77     //Synbian interface gives values between -680 - 680

    78     m_sampleFactor =  this->sensor()->outputRanges()[0].maximum / 680.0f;

    79 }

    80 

    81 QS60SensorApiAccelerometer::~QS60SensorApiAccelerometer()

    82 {

    83     stop();

    84     delete m_nativeSensor;

    85     m_nativeSensor = NULL;

    86 }

    87 

    88 void QS60SensorApiAccelerometer::start()

    89 {

    90     if(!m_nativeSensor)

    91         return;

    92     

    93     m_nativeSensor->AddDataListener(this);    

    94 }

    95 

    96 void QS60SensorApiAccelerometer::stop()

    97 {

    98     if(!m_nativeSensor)

    99         return;

   100     

   101     m_nativeSensor->RemoveDataListener();

   102 }

   103 

   104 void QS60SensorApiAccelerometer::poll()

   105 {

   106     //empty implementation

   107 }

   108 

   109 

   110 void QS60SensorApiAccelerometer::HandleDataEventL(TRRSensorInfo aSensor, TRRSensorEvent aEvent)

   111 {

   112     if (aSensor.iSensorId != KAccelerometerSensorUID) 

   113         return; 

   114     

   115     TTime time;

   116     time.UniversalTime();

   117     m_reading.setTimestamp(time.Int64());

   118     m_reading.setX((qreal)aEvent.iSensorData2 * m_sampleFactor);

   119     m_reading.setY((qreal)aEvent.iSensorData1 * -m_sampleFactor);

   120     m_reading.setZ((qreal)aEvent.iSensorData3 * -m_sampleFactor);

   121     newReadingAvailable();

   122 }

   123 

   124 void QS60SensorApiAccelerometer::findAndCreateNativeSensorL()

   125 {

   126     if(m_nativeSensor)

   127         return;

   128     

   129     RArray<TRRSensorInfo> sensorList;

   130     CRRSensorApi::FindSensorsL(sensorList);

   131     CleanupClosePushL(sensorList);

   132 

   133     TInt index = 0;

   134     do {

   135         if (sensorList[index].iSensorId == KAccelerometerSensorUID)

   136             m_nativeSensor = CRRSensorApi::NewL(sensorList[index]);

   137     } while(!m_nativeSensor && ++index < sensorList.Count());

   138         

   139     if (!m_nativeSensor)

   140         User::Leave(KErrHardwareNotAvailable);

   141     

   142     CleanupStack::PopAndDestroy(&sensorList);

   143 }