Some questions about A-GPS in Symbian

[Syldinn]

Hello,

I am new to Forum Nokia and Symbian development in general, so feel free to correct me if I am doing things wrong...

Actually, I want to develop an application using my Nokia 6220 classic's A-GPS chipset. I have read some location-related threads and wiki articles and I am quite confused, so I have some questions.

First, I did not understand properly how the Location API deals with the A-GPS chipset. Are there means to :
- configure and monitor the data connection before the fix ?
- switch the chipset ON or OFF to save battery ?

And I did not understand either what happens if the data connection fails. Does the framework automatically switch to a mere GPS fix ?

Thanks for your answers,
Syldinn

[mahbub_s60]

Hello,

I am new to Forum Nokia and Symbian development in general, so feel free to correct me if I am doing things wrong...

Actually, I want to develop an application using my Nokia 6220 classic's A-GPS chipset. I have read some location-related threads and wiki articles and I am quite confused, so I have some questions.

First, I did not understand properly how the Location API deals with the A-GPS chipset. Are there means to :
- configure and monitor the data connection before the fix ?
- switch the chipset ON or OFF to save battery ?

And I did not understand either what happens if the data connection fails. Does the framework automatically switch to a mere GPS fix ?

Thanks for your answers,
Syldinn

Hi,

A GPS is not a chip. Íf the device does not have GPS then there is no AGPS also.
See this http://wiki.forum.nokia.com/index.ph...methods_in_S60

[Syldinn]

Sorry, I wasn't clear enough. My target device can use both GPS and A-GPS.

What I wanted to know was if some specific code had to be developed to use A-GPS instead of mere GPS, or if Symbian APIs already provided such methods.

[mahbub_s60]

You may see this example
Symbian provide that already. However in you settings you have to enable AGPS option if not enabled.

[Syldinn]

OK, thanks a lot for your reply.
I'll test this example and try to learn from it.

[mahbub_s60]

In the SDK there is a file LbsCommon.h and in that there is a enum _TTechnologyType that says what is being used at the moment.
At the beginning A GPS is used and later built in GPS is used.

Just for your information, here is some code I am using for checking if it is using built in GPS

    error = iPosServer.GetNumModules(module);
    if(error != KErrNone)
        {
        iPosServer.Close();
        iGPSAvailable = EFalse;        
        return; 
        }
    
    TPositionModuleInfo info;
    
    for(TUint i = 0; i < module; i++)        
        {
        error = iPosServer.GetModuleInfoByIndex(i,info);
        if(info.TechnologyType()& TPositionModuleInfo::ETechnologyTerminal)
            {
            iGPSAvailable = ETrue;
            break;
            }
        else
            {
            iGPSAvailable = EFalse;    
            }
        }