Well, options are enabled in cascade. The problem comes because the first
option is not enabled. Besides, if you look at the Wireless Settings
screen, there is only the "NFC Settings" option, but not the one that lets
you enalbe/disable NFC directly from that screen. That is beacuse the Nfc
service in not available. Connection to a computer in debug mode will draw
some light.

Instead of compiling the whole image again I suggest you to compile just
the Nfc.apk system application and replace the original one. You must
remount /system partition in read/write mode and overwrite the apk inside
/system/app. Then you must kill the nfc service by means of DDMS view of
the ADT (you must connnect the phone in debug mode and since you have
compiled in userdebug mode you will see all the running proccesses). The
service will restart automatically.

When it comes to read/write the card by means of an external reader, any
Mifare Classic 4K compatible RFID reader will do. If you try to access
directly to the SE from an Android application I am afraid to disappoint
you but that is not possible, at least I wasn't successful at it and nobody
I know either. The reasons are well described in other posts and on
stackoverflow.

Regards

On Wed, Jan 4, 2012 at 2:56 PM, s.rawat <imsaurabhra...@gmail.com> wrote:

> Thanks !
> I will also try from my side recompiling it.So you mean I should get the
> Check boxes enabled for
> > *Only Card EmulationMode*
> and
> > *Use External SE*
>
> My main aim is to write to the NFC card in card emulation mode so that it
> can be read by any Card Reader.is it possible after your patches are
> applied using teh android SDKs or do we have to write some native
> application.
> Rgds,
> Softy
> "..pain is temporary.....quitting lasts forever......"
>
>
>
>
> 2012/1/4 Fernando Miguélez <fernando.migue...@gmail.com>
>
>> Great work.
>>
>> Obviously there is something wrong with the compilation. Have you tried
>> to connect in debug mode the phone to a computer with Android Development
>> Tools and see what the traces look like. They may offer a clue. My
>> suspicion is that NfcService is crashing. I will review my notes tomorrow
>> if I find something different to the steps you followed to build the image.
>>
>> On Wed, Jan 4, 2012 at 9:17 AM, softy <imsaurabhra...@gmail.com> wrote:
>>
>>> Hi All,
>>> Thanks Fernando Miguélez Palomo for posting the patches.I have applied
>>> it to 2.3.4-r1 Android gingerbread and compiled /flashed it on Samsung
>>> Nexus S and was able to see the NFC Settings changed(though i cant select
>>> them, they are disabled)
>>> I have blogged the whole steps 
>>> here<http://techshek4u.blogspot.com/2012/01/applying-card-emulation-patch-to_03.html>.Plz
>>>  let me know if I miss something.
>>>
>>> @ Fernando Miguélez Palomo
>>> What next after that.How can i test this.Any source code or tool /card
>>> reader description will be enlightening.
>>> Rgds,
>>> softy
>>>
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