FreeCalypso > hg > fc-sim-sniff

annotate README @ 49:7e87b03dd57d

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doc/Sniffing-workflow: document simsniff-dec
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 21 Sep 2023 06:47:03 +0000
parents 510bef2b2000
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1 Welcome to FreeCalypso SIMtrace3
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2 ================================
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4 FC SIMtrace3 (aka SIMtrace-ice) is an alternative implementation of Osmocom
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5 SIMtrace principal idea, using an iCE40 FPGA instead of AT91SAMx MCU as the ISO
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6 7816-3 sniffing receiver. Aside from this change from an MCU to an FPGA and
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7 thus from firmware to gateware, the other principal difference is that SIMtrace3
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8 is electrically clean and proper:
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10 * The sniffing apparatus makes a strictly Hi-Z connection to the SIM bus being
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11 sniffed;
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13 * The SIM bus itself is solidly connected from the phone's SIM socket to the
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14 physical SIM without any switches or pull-ups or other Heisenbug-inducing
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15 artifacts;
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17 * The sniffing apparatus supports all 3 voltage classes that can be put out by
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18 the ME or other interface device: 1.8V, 3V and 5V are all good.
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20 The hardware setup of SIMtrace3 consists of:
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22 * The same SIMtrace FPC cables (going from a SIM socket to the 6-pin FPC
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23 connector) that were originally developed for SIMtrace1/2 and are sold by
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24 Sysmocom;
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26 * An off-the-shelf Lattice Icestick FPGA board;
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28 * A little bit of custom hardware: two very simple boards in the initial
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29 version, intending to consolidate them into one board in the final version,
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30 see doc/Sniffing-hw-setup for the details.
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32 This source repository contains:
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34 boards Design files for little adapter boards
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35 fpga Gateware for the iCE40HX1K FPGA on the Icestick board
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36 sw Host software tools