FreeCalypso > hg > fc-sim-sniff

annotate doc/Cardem-plans @ 40:510bef2b2000

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
new README, old stuff goes to doc/Motivation
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 30 Aug 2023 05:39:53 +0000
parents a9e87abeeaa2
children 1068f9fd41d5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
39
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 The long-term goal of SIMtrace3 project is to support both SIM interface
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 sniffing and card emulation. Both functions are needed when working in the
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 realm of Vintage Mobile Phones:
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * Non-invasive, Heisenbug-free Hi-Z sniffing is needed in order to see why
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 certain phone-to-SIM combinations work while others don't, and to see exactly
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 what a given finicky phone requires from that special hard-to-get SIM.
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 * The next step of cloning that special SIM, or producing new SIMs that satisfy
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 the weird requirements of the finicky phone, will often require full emulation
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 of ISO 7816-4 / GSM 11.11 file system and CardOS in software, as we don't have
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 a real smartcard chip that gives us full freedom to implement whatever we
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 like.
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 However, in terms of scheduling priority, all of our initial work focuses on
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 the sniffer, with cardem deferred to some indefinite later time. We do,
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 however, have a preliminary idea of how we envision cardem working:
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 * Hardware setups will be different between sniffing and cardem. Our initial
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 objective is to produce a solidly usable, production quality sniffer pod,
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 described as HW setup version 2 in the Sniffing-hw-setup article. As the
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 name says, this pod will be for sniffing only. For card emulation there will
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 be a different cardem pod.
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 * The cardem pod will be similar to the sniffer pod, with just two changes:
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 - We'll add a 74LVC1G07 OD driver for pulling the I/O line low in exactly the
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 same way how real SIM cards do it;
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 - The SIM socket will be eliminated from the cardem pod, to eliminate any
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 possibility of a real SIM and cardem "fighting" to talk back to the same
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 ME/ID.
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 * FPGA gateware will also be different between sniffing and cardem. The cardem
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 design is expected to be more complex and use more FPGA resources, but there
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 is a good chance it will still fit into iCE40-HX1K FPGA and thus allow us to
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 keep using the same Icestick board.
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 * Right now we have no plans to stick a soft CPU core into the FPGA for cardem,
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 instead the plan is to use the same principal architecture as the sniffer
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 FPGA, using the UART channel at 3 Mbps to communicate with the host - although
a9e87abeeaa2 doc/Cardem-plans: article written
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 this time this UART will be used bidirectionally.