My goal is to have an Android phone (Samsung Galaxy Nexus) communicate with
a TI TRF7970A card in emulation mode (emulates ISO-14443 type B tag)
through NFC.
I understand that the PCD (Android phone) sends out a "REQB" with a given
AFI and then which ever PICC's (in my case only PICC is the TI TRF7970
card) that have a matching AFI will send an "ATQB" back to the PCD.
In some TRF7970A firmware the "ATQB" response was set up like so:
0x50; //
//PUPI
0x80; // PUPI_0
0x12; // PUPI_1
0x34; // PUPI_2
0x56; // PUPI_3
//Application DATA
0x40; // APP_0 AFI Telecommunication (Telephone,GSM) All Sub families
1-F
0xE2; // APP_1 CRC_B of the AID (multibyte application identifier code
which identifies an application provider or issuer and indicates if the
application provider is registered with ISO)
0xAF; // APP_2 CRC_B of the AID
0x11; // APP_3 # of applications (1)
//Protocol DATA
0x80; // Data rate capabilities (Same bit rate from PCD to PICC and
from PICC to PCD compulsory)
0x71; // Max Frames (128 bytes) / Protocol Type (supports PICC ISO
14443-4)
0x85; // FWI (0b1000 - 8192 ETUs or 77328.6 us) / ADC (0b01 -
determines what APP_0-3 are if 0b00 then App data can be anything) / FO
(0b01 - CID Supported - used for identification of multiple cards in the
Active state)
This "ATQB" has the PCD (Android phone) automatically launch the web
browser with URL "http://www.Cisco Auth Complete".
Question:
(1) Which field tells the phone to automatically launch the web browser?
How can I change that field so that I can manually chose which application
acts on the intent?
I've tried looking online to learn how I can manipulate the fields but have
had no luck.
I read 3 Type B 14443-4 Smart Cards (MAXIM-MAX66020k-00AA+) with my Android
phone and the "ATQB"'s were as follows:
Card 1 Card 2 Card 3
0x50 0x50 0x50
//PUPI
0xd8 0x99 0x1a
0x60 0x5c 0x61
0x02 0x02 0x02
0x00 0x00 0x00
//Application Data
0x10 0x20 0x10
0x10 0x00 0x10
0x11 0x2b 0x11
0x11 0xe0 0x11
//Protocol Data
0x00 0x00 0x00 106Kbits/sec
0x00 0x00 0x00 16 bytes / Not type B -4 complient)
0x00 0x00 0x00 32 ETUs / Application is proprietary / Nad "nor" CID are
supported
I tried sending these exact ATQB messages with the TI TRF7970A card but the
Android phone still does not act on the "ATQB" response.
Question:
(2) Can you point out a reason why any of these last 3 "ATQB"'s wouldn't be
excepted?
(3) What are some legit "ATQB"'s that when sent to my Android phone it will
create an intent?
(4) Are there rules I can follow so that my android phone always creates an
intent on the "ATQB"'s I respond with from the TI TRF7970A?
If you could direct me to a source that can explain any of this, it would
be greatly appreciated.
Thanks in advance!
-Derek
--
You received this message because you are subscribed to the Google Groups
"Android Discuss" group.
To view this discussion on the web visit
https://groups.google.com/d/msg/android-discuss/-/t9ooanOQO4oJ.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/android-discuss?hl=en.
