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ea1423e7
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laforge
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<?xml vesion='1.0' encoding='ISO-8859-1'?>
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<!DOCTYPE article PUBLIC '-//OASIS//DTD DocBook XML V4.3//EN' 'http://www.docbook.org/xml/4.3/docbook.dtd'>
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<article id="openpcd-reference">
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<articleinfo>
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<title>OpenPCD - A 13.56MHz RFID reader</title>
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<authorgroup>
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<author>
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<personname>
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<first>Harald</first>
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<surname>Welte</surname>
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</personname>
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<email>hwelte@hmw-consulting.de</email>
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</author>
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<author>
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<personname>
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<first>Milosch</first>
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<surname>Meriac</surname>
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</personname>
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<email>meriac@bitmanufaktur.de</email>
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</author>
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</authorgroup>
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<copyright>
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<year>2006</year>
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<holder>Harald Welte <hwelte@hmw-consultin.de> </holder>
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</copyright>
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<date>Oct 12, 2006</date>
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<edition>1</edition>
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<releaseinfo>
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$Revision: 1.0 $
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</releaseinfo>
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<abstract>
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<para>
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This is the reference documentation for the OpenPCD RFID
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reader.
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</para>
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<para>
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</para>
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</abstract>
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</articleinfo>
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<section>
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<title>Introduction</title>
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<para>
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The OpenPCD project is about desinging and building both hardware and software
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for a user-programmable reader (proximity coupling device, PCD) of the ISO
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14443 A+B (and later ISO15693) RFID protocols.
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</para>
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<para>
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The hardware is based on the Atmel AT91SAM7S128 microcontroller, featuring a
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48MHz, 32bit ARM7TDMI core with many integrated peripherals, such as USB
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device, SSC, ADC, 128kByte Flash, 32kByte SRAM, ...
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</para>
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<para>
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Next to the AT91SAM7, there is the Pilips CL RC 632 RFID reader ASIC. It
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is attached via SPI (Serial Peripheral Interface) to the AT91SAM7.
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</para>
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<para>
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The SAM7 attaches to a host PC using a USB 1.1 interface. The SAM7 firmware
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implements various forms of interface between the RC632 and the host PC.
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There are multiple firmware images available, some of them acting as a dumb
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transceiver, while others implement the full ISO 14443 protocol suite inside
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the SAM7 firmware.
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</para>
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<para>
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All device firmware and host software source code is released under GNU General
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Public License. The hardware design (schematics, PCB) is released under
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"Creative Commons share-alike attribution" License.
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</para>
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</section> <!-- Introduction -->
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<section>
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<title>Hardware</title>
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<para>
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FIXME: to be filled by milosch
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</para>
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<xi:xinclude href="common-hardware.xml" parse="xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>
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</section>
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<section>
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<title>Software</title>
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<xi:include href="common-usbproto.xml" parse="xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>
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<section>
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<title>PICC specific commands</title>
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<section>
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<title>CMD_PICC_REG_WRITE</title>
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<para>
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Using this command, a given OpenPICC register can be written to.
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</para>
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</section>
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<section>
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<title>CMD_PICC_REG_READ</title>
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<para>
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Using this command, a given OpenPICC register can be read.
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</para>
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</section>
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</section> <!-- PICC specific commands -->
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<section>
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<title>ADC specific commands</title>
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</section> <!-- ADC specific commands -->
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<section>
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<title>GPIO IRQ commands</title>
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<para>
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Using these commands, the host software can request a USB interrupt
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transfer to be sent once a given GPIO pin changes its level
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</para>
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</section> <!-- GPIO IRQ commands -->
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</section> <!-- USB protocol commands -->
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</section> <!-- USB protocol -->
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<xi:include href="common-targetsoftware.xml" parse="xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>
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<section>
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<title>The main_dumbreader firmware</title>
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<para>
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The main_dumbreader firmware implements a very basic PCD/VCD firmware, where
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the USB device only implements an access layer to the RC632 registers and
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FIFO. All protocol and application logic has to be implemented on the host
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PC.
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</para>
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<para>
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This provides the greatest flexibility to the host software, since it can
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easily alter the behaviour of the device completely. Host development is
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easier than cross-compilation and remote debugging required for firmware
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development.
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</para>
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<para>
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Therefore, this firmware is the choice for most security researchers, since
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all timing and every bit of the protocol can be dealt with on the host.
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</para>
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</section> <!-- main_dumbreader -->
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<section>
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<title>The main_librfid firmware</title>
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<para>
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This firmware is called 'main_librfid' because it contains a full copy of the
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librfid library, cross compiled for ARM. The librfid library implements
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various 13.56MHz RFID protocols from layer 2 to layer 4 and higher, including
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ISO 14443, ISO 15693, Mifare classic, Mifare ultralight and others.
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</para>
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<para>
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The USB protocol of this firmware has not yet been fully speicified, also
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there currently is no finished host software that could interface this
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firmware yet. Stay tuned for upcoming news on this subject.
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</para>
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</section> <!-- Target Software -->
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<section>
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<title>Host Software</title>
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<para>
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TBD
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</para>
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<xi:include href="common-hostsoftware.xml" parse="xml" xmlns:xi="http://www.w3.org/2003/XInclude"/>
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</section> <!-- Host Software -->
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</section> <!-- Software -->
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</article>
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