Need help inorder to save the data to my cell phone"N97" from Phonecompass applicatio

[abdul_qudoos2003]

Hello All

I need some help from you guys. I found one application on wiki that is for the magnetometer/compass and application is tested in Nokia N97 successfully "http://wiki.forum.nokia.com/index.php/How_to_turn_the_N97_into_a_Magnetic_Compass". full source code is available and the program is written in C++

I installed this application on my N97 and working fine. But the additional output that I want from the application is to store that displayed data in my cellphone, so latter I can see those values after stopping the application.

The values application is displaying on its Application User interface are angle, accuracy. I want to save these values.

Please share your ideas and give me some suggestions about how to proceed with my question

[symbianyucca]

Check where you get the values from, and then just implement a file saving functionality there. Basically the actual method would be depending on how you would want to save the data. You could for exmaple use RFile for making simple plain text files, or you could use for example RDbNamedDatabase for storing the data into the database..

Anyway, how are you planning to use the data later on ?

[abdul_qudoos2003]

Check where you get the values from, and then just implement a file saving functionality there. Basically the actual method would be depending on how you would want to save the data. You could for exmaple use RFile for making simple plain text files, or you could use for example RDbNamedDatabase for storing the data into the database..

Anyway, how are you planning to use the data later on ?

Hello

Yes the data is coming from the magnetometer sensor of the cellphoneand the displayed at the application user interface that data is "angle and accurace" and I want to use the simple plain text file for storing data. Can you please give me more idea about the "RFile method" so that I can proceed with my problem.

By the way I want to anyalyse from the stored data that in which direction I moved and later on I can interpret that data on graphical represnetation for further analysis.
Regards
Abdul

[symbianyucca]

here's one wiki article: http://wiki.forum.nokia.com/index.ph..._writing_files

[abdul_qudoos2003]

hello

can you guide me in detail, I read the article as far as I understand this article is working for both reading and writing "am I correct".

If yes then, I have to write the data only in Nokia N97 buffer. Below is the code for Phone COmpas "can you give me hint where to edit this program in order to save the displayed data". I will b vey much thankful to you.


/*
* sensorchecking.cpp
*
* Created on: Nov 9, 2009
* Author: mrahman
*/

#include "sensorchecking.h"




CSensorchecking* CSensorchecking::NewL( MMagneticSensrDataReceiver & aAppView )
{

CSensorchecking* self = new ( ELeave ) CSensorchecking( aAppView );
CleanupStack::PushL(self);
self->ConstructL();
CleanupStack::Pop(self);
return self;
}

void CSensorchecking::ConstructL()
{

CSensrvChannelFinder* ChannelFinder = CSensrvChannelFinder::NewL();

CleanupStack::PushL(ChannelFinder);
//List of found channels.
RSensrvChannelInfoList ChannelInfoList;
TSensrvChannelInfo ChannelInfo;

ChannelInfo.iChannelType = KSensrvChannelTypeIdMagneticNorthData;
ChannelFinder->FindChannelsL( ChannelInfoList, ChannelInfo );

for(TInt i = 0; i< ChannelInfoList.Count(); i++)
{
ChannelInfo = ChannelInfoList[i];
if(ChannelInfo.iChannelType == KSensrvChannelTypeIdMagneticNorthData)
{
iMagneticNorthSensor = CSensrvChannel::NewL( ChannelInfoList[ i ] );
iMagneticNorthSensor->OpenChannelL();
iMagneticNorthSensor->StartDataListeningL( this,1,1,0 );
}

}

CleanupStack::Pop(ChannelFinder);
delete ChannelFinder;
ChannelFinder = NULL;

}

// -----------------------------------------------------------------------------
// CSensorchecking::CSensorchecking()
// C++ default constructor can NOT contain any code, that might leave.
// -----------------------------------------------------------------------------
//
CSensorchecking::CSensorchecking( MMagneticSensrDataReceiver & aAppView )
: iDataObserver( aAppView )
{

iMagnetometerCalibrationLevel = 0;
iMagnetometerAngleFromNorth = 0;
// No implementation required
}

// -----------------------------------------------------------------------------
// CSensorchecking::~CSensorchecking()
// Destructor.
// -----------------------------------------------------------------------------
//
CSensorchecking::~CSensorchecking()
{

if( iMagneticNorthSensor )
{
iMagneticNorthSensor->StopDataListening();
iMagneticNorthSensor->CloseChannel();
delete iMagneticNorthSensor;
iMagneticNorthSensor = NULL;
}



}

// -----------------------------------------------------------------------------
// CSensorchecking:ataReceived
// New data is available in the receiving buffer.
// -----------------------------------------------------------------------------
//
void CSensorchecking:ataReceived( CSensrvChannel& aChannel,
TInt /*aCount*/,
TInt /*aDataLost*/ )
{

TSensrvChannelInfo Channelinfo = aChannel.GetChannelInfo();
if (Channelinfo.iChannelType == KSensrvChannelTypeIdMagneticNorthData)
{
//TSensrvMagnetometerAxisData
TSensrvMagneticNorthData magNorthData;
TPckg<TSensrvMagneticNorthData> magNorthPackage(magNorthData);
aChannel.GetData(magNorthPackage);
iMagnetometerAngleFromNorth = magNorthData.iAngleFromMagneticNorth;
TSensrvProperty calibration;
aChannel.GetPropertyL(KSensrvPropCalibrationLevel,0,calibration);
calibration.GetValue(iMagnetometerCalibrationLevel);
if(iMagnetometerCalibrationLevel > 0)
{
TRAPD(err, iDataObserver.AngleAndAccuracyReceivedL(iMagnetometerAngleFromNorth, iMagnetometerCalibrationLevel));
}
}

}


// -----------------------------------------------------------------------------
// CSensorchecking:ataReceived
// Data listening failed.
// -----------------------------------------------------------------------------
//
void CSensorchecking:ataError( CSensrvChannel& /*aChannel*/,
TSensrvErrorSeverity /*aError*/ )
{

}

// -----------------------------------------------------------------------------
// CSensorchecking::GetDataListenerInterfaceL
// Get supported interface.
// -----------------------------------------------------------------------------
//
void CSensorchecking::GetDataListenerInterfaceL(
TUid /*aInterfaceUid*/, TAny*& aInterface )
{

// Set interface as NULL to indicate only default interface currently supported.
// If new interface(s) is being introduced and application wants to support that
// aInterfaceUid must be checked and aInterface set accordingly.
aInterface = NULL;
}

[symbianyucca]

I suppose the function AngleAndAccuracyReceivedL gets the data as it comes in. And yes the wiki example appears to have both reading & writing parts.

[abdul_qudoos2003]

Hi all

Actually I am using Phone compass "http://wiki.forum.nokia.com/index.php/How_to_turn_the_N97_into_a_Magnetic_Compass" application in Nokia N97 but its not storing the values in the cell phone that values are "angle and accuracy".

So I want to store these value by using filelogger.
I downloaded the file logger and installed the Y browser in Nokia N97 and create folder in C:\logs\nt.

My question is how to compile the file logger, please guide me through this process so I can Proceed further.

[hotcheese]

What do you mean by the filelogger? Where did you download it from? I can't see anything called filelogger on that web page.

[abdul_qudoos2003]

What do you mean by the filelogger? Where did you download it from? I can't see anything called filelogger on that web page.

Here you can find the file logger "http://wiki.forum.nokia.com/index.php/File_logger" how I can proceed with the file logger to save the values from MagnetometerCompass sensor.

this the application for COmpass "http://wiki.forum.nokia.com/index.php/How_to_turn_the_N97_into_a_Magnetic_Compass" code is freely available.