[bergerc]

Hi,

I'm trying to developp an API to the lbs services to use the N95 internal GPS device. My first version of the extension is located here (mercurial repository) : https://air.mosomuso.com/pubhg/pyext/

It returns lat, lon, alt, accuracy (hor, vert) and name of the module used but it requires a DevCert signature with Location capabilities.

I'm looking forward to get advices or comments. I didn't integrate it to location extension, but it would be logical to do it.

And, also, I'm trying to make it non-blocking, but I don't find how to do it, Python crashes when I just make a Positioner.NotifyPositionUpdate(PosInfo, Status) without waiting for the Async call to return. I'm not experienced with Symbian programming and I may not well understanding how it goes on.

I also looking to make it coherant with the functionning of lbs (updates, returning or not a position if the GPS is online or if the value is old...)

Thanks

[dpeddi]

May this thread solve your problem?

http://discussion.forum.nokia.com/fo...ead.php?t=7597

Eddi

[bergerc]

Originally Posted by dpeddi

May this thread solve your problem?

http://discussion.forum.nokia.com/fo...ead.php?t=7597

I may miss something but it still blocks the process waiting for the response to be available, isn't it ?
I'm using the same thing based on an example of the module ext/location of PyS60.

I was wondering if it was possible to do something like :

* Do the request
* returns with value None (no value available)
* The request finishes and the value is updated in the object
* the next call returns the actual value and a new request is issued.

What would be better is :
A timer that refreshes the value every 10 seconds, and the accessor only returns the value present in the object (with optionnaly a timestamp to evaluate the accuracy of the value returned)

I tried to do that but Python crashes... no idea what I was doing wrong.

=> can I just bypass the CActiveSchedulerWait::Start not to wait the response to come ?
Code I took from the asynccallhandler.cpp file in PyS60 ext/location folder:

iWait=new (ELeave) CActiveSchedulerWait;

  this->iPositioner.NotifyPositionUpdate(posInfo, status);
  this->SetActive();
  this->iWait->Start();
  status=this->iStatus;

Thanks

[jplauril]

Note that you must always release the interpreter lock before entering the Active Scheduler and reacquire it upon return. In the above code you must do:

PyEval_SaveThread();
this->iWait->Start();
PyEval_RestoreThread(PYTHON_TLS->thread_state);

[bergerc]

Originally Posted by jplauril

Note that you must always release the interpreter lock before entering the Active Scheduler and reacquire it upon return. In the above code you must do:

PyEval_SaveThread();
this->iWait->Start();
PyEval_RestoreThread(PYTHON_TLS->thread_state);

Well, this is done with Py_BEGIN_ALLOW_THREADS and Py_END_ALLOW_THREADS, isn't it ?
So it is done but a little bit before and after this code block.

[jplauril]

Yes, these two calls do the same thing.

[simo.salminen]

If you wonder how to do async callbacks in pys60 from c++ to python code, look the code of e32.ao_sleep. Tell if you have problems.

[marciallus]

Hello

I've writed two simple App which can perhaps give you so tricks to use the LBS API :
http://www.newlc.com/playing-n95
and http://www.newlc.com/playing-n95-use...pi-and-so-more

perhaps it can helps

--
MarCo

[bergerc]

Hi,

Originally Posted by marciallus

Hello

I've writed two simple App which can perhaps give you so tricks to use the LBS API :

I will look at it.

Thank you

[carknue]

Does it work with E90?

[bergerc]

It should work with the E90 as it runs the same system/version as the N95 which I used to test it.

[bergerc]

I comitted a new version of the gps_location module, it now uses active object but still has problems. If someone wants to review the code it will be appreciated.

mercurial repository : https://air.mosomuso.com/pubhg/pyext/

I comitted an other module to perform wlan scanning, it returns data about seen wlan networks (SSID, BSSID, Rx Level...) but uses an API from the Extensions plug-in package for S60 3rd Edition SDK for Symbian OS, for C++, MR, Version 4 (http://forum.nokia.com/info/sw.nokia...Pack1.zip.html)

please feel free to test it.

[bergerc]

Originally Posted by bergerc

I comitted a new version of the gps_location module, it now uses active object but still has problems. If someone wants to review the code it will be appreciated.

mercurial repository : https://air.mosomuso.com/pubhg/pyext/

I've just seen that the 1.3.23 PyS60 version includes a position module... so mine is no longer interesting...

[aaaaapo]

Originally Posted by bergerc

I've just seen that the 1.3.23 PyS60 version includes a position module... so mine is no longer interesting...

import positioning
pos = positioning.position()

This just replaced 723 lines of my BtGpsReader.py + NMEAParser.py + Position.py code.

I love high level programming languages like Python for series 60. :-)

[maaysn]

Originally Posted by marciallus

Hello

I've writed two simple App which can perhaps give you so tricks to use the LBS API :
http://www.newlc.com/playing-n95
and http://www.newlc.com/playing-n95-use...pi-and-so-more

perhaps it can helps

--
MarCo

hi marco ,

i have got a problem here. i build your application example at newLC. i sent it to my phone but when i try to install it it gives me error like "Required application access not guaranteed" (phone is NOKIA N95)

how can i solve this?