segatools/doc/nfc.txt

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2018-11-28 16:49:55 +00:00
N.B. Quoted strings are NOT NUL-terminated unless otherwise noted.
Useful reading: https://www.nxp.com/docs/en/data-sheet/MF1S50YYX_V1.pdf
(AiMe branded cards are Mifare Classic cards. Other technologies exist though)
Summary
-------
Hardware:
Assembly connector:
5V Host in
Tx;Rx;GND Host RS232 in
Tx;Rx;GND Daisy-chain out
Main board (probably LED controller):
Silk "837-15084"
CN1: Host 5V power in, ?V NFC-sub power out
CN2: Host RS232 Tx;Rx;GND in, NFC-sub Tx;Rx out
CN3: LED-Sub power and data(?) out
DIPSW1: Set to hex nibble 8.
Contains ADM3222 RS232 transceiver IC
Contains ATMega32 MCU
NFC subboard:
Sticker: Model "TN32MSEC003S"
CN1: ?V power and Tx;Rx;GND in, Tx;Rx;GND ass'y CN daisy out.
DIPSW1: Set to hex nibble 0.
Contains ATmega168 MCU
Contains ADM3202A RS232 transceiver IC
Contains shielded RF circuit
Entire non-ground-plane PCB area is visible through the chassis
torx screws lol
LED subboard:
Silk: "837-15120"
CN1: ?V power and Tx;Rx;GND in.
Five RGB LEDs and a bunch of resistors
No visible logic ICs..?
No DIPSW.
JVS framing:
E0 sync
D0 escape (+1 to unescape)
Checksum is sum of bytes after unescaping
Frame header:
Frame length (including length byte itself)
Address
Sequence no, hopefully loops before hitting esc byte...
Command byte
Bus addressing:
Low nibble set using DIPSWs
High nibble ???
Daisy chaining mechanism unknown (RS232 wires probably multi-tap)
Startup
-------
Addr 00 Command 62:
Req:
00 Payload length
Resp:
00 Status byte
00 Payload length
Description:
Unknown. Reset?
Addr 00 Command 30:
Req:
00 Payload length
Resp:
00 Status byte
17 Payload length
.. "TN32MSEC003S F/W Ver1.2E"
Description:
Get firmware version
Addr 00 Command 32:
Req:
00 Payload length
Resp:
00 Status byte
17 Payload length
.. "TN32MSEC003S H/W Ver3.0J"
Description:
Get hardware version
Addr 08 Command f5:
Req:
00 Payload length
Resp:
00 Status byte
00 Payload length
Description:
LED sub-board reset.
Won't accept LED commands until you do this.
Addr 08 Command f0:
Req:
00 Payload length
Resp:
00 Status byte
09 Payload length
.. "15084" (part nr for LED board)
FF ??
11 ??
00 ??
12 ??
Description:
Get board "info"
Addr 00 Command 54:
Req:
06 Payload length
57 'W'
43 'C'
43 'C'
46 'F'
76 'v'
32 '2'
Resp:
00 Status byte?
00 ??
Description:
Set Mifare KeyA.
"WCCF" might refer this this SEGA arcade game:
https://en.wikipedia.org/wiki/World_Club_Champion_Football
It's quite old and has AiMe readers, maybe where they first appeared?
Addr 00 Command 50:
Req:
06 Payload length
60 ??
90 ??
D0 ?? (This is escaped of course)
06 ??
32 ??
F5 ??
Resp:
00 Status byte
00 Payload length
Description:
Possibly Mifare KeyB.
Polling
-------
Addr 00 Command 40:
Req:
01 Payload length
03 ??
Resp:
00 Status byte
00 Payload length
Description:
Poll some other NFC technology?
Addr 00 Command 42:
Req:
00 Payload length
Resp if no MiFare card:
00 Status byte
01 Payload length
00 (represents nothing i guess)
Resp if MiFare card:
00 Status byte?
07 Payload length
01 Chunk length?
10 ?? Block size maybe?
04 Chunk length?
.. Mifare UID, four bytes.
Description:
Check for Mifare card presence?
Addr 00 Command 41:
Req:
00 Payload length
Resp:
00 Status byte
00 Payload length
Description:
Unknown. Poll some other NFC technology?
Card read
---------
Addr 00 Command 43:
Req:
04 Payload length
.. Mifare UID, four bytes.
Resp:
00 Status byte
00 Payload length
Description:
Select MiFare by UID?
Addr 00 Command 55:
Req:
05 Payload length
.. Mifare UID, four bytes.
03 ??
Resp:
00 Status byte
00 Payload length
Description:
Unknown.
Block 3 on a Mifare sector contains keys and an access control list.
It is generally not accessed directly (unless being provisioned?)
Addr 00 Command 52:
Req:
05 Payload length
.. Mifare UID, four bytes.
.. Block number, 1 or 2.
Resp for Block 1:
00 Status byte
10 Payload length (1 block)
.. "SBSD"
00 00 00 00
00 00 00 00
00 4E C6 22
Resp for Block 2:
00 Status byte
10 Payload length (1 block)
.. 00 00 00 00 00 00 xx xx
xx xx xx xx xx xx xx xx
Description:
Probably reads blocks 1 and 2 from Mifare sector 0.
Block 0 contains the "vendor information" and UID.
Block 1 contents are unknown, probably AiMe DB info.
Block 2 last 10 bytes hex are printed on the card ("local unique id").
(Block 3 contains encryption keys so is not allowed to be read)
LED
---
Addr 08 Command 81:
Req:
03 Payload length
ff Red intensity
ff Green intensity
ff Blue intensity
Resp:
None! Command is not acknowledged
Description:
Set LED color