add README.md

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README.md

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+OpenPCD, OpenPICC and SIMtrace device firmware
+==============================================
+
+This repository contains the C-language firmware of a couple of
+different USB devices that share nothing in common but the fact that
+they contain and Atmel AT91SAM7S microcontroller and that Harald Welte
+was involved in their development.
+
+The OpenPCD 1.x and OpenPICC 1.x devices are pretty much obsolete these
+days, so SAM7S based SIMtrace 1.x is the only relevant platform these
+days.
+
+[Osmocom](https://osmocom.org/)
+[SIMtrace](https://osmocom.org/projects/simtrace) is a USB-attached
+peripheral device that is primarily used to sniff the traffic between a
+SIM/USIM card and a Phone or cellular modem.
+
+Homepage
+--------
+
+The official homepage of the project is
+<https://osmocom.org/projects/simtrace/wiki/>
+
+GIT Repository
+--------------
+
+You can clone from the official openpcd.git repository using
+
+	git clone git://git.osmocom.org/openpcd.git
+
+There is a cgit interface at <http://git.osmocom.org/openpcd/>
+
+Documentation
+-------------
+
+Ther homepage (see above) contains a wiki with information as well as
+the SIMtrace user manual.
+
+Mailing List
+------------
+
+Discussions related to SIMtrace are happening on the
+simtrace@lists.osmocom.org mailing list, please see
+<https://lists.osmocom.org/mailman/listinfo/simtrace> for subscription
+options and the list archive.
+
+Please observe the [Osmocom Mailing List
+Rules](https://osmocom.org/projects/cellular-infrastructure/wiki/Mailing_List_Rules)
+when posting.
+
+Contributing
+------------
+
+Our coding standards are described at
+<https://osmocom.org/projects/cellular-infrastructure/wiki/Coding_standards>
+
+We use accept code/patch submissions via e-mail to the above-mentioned
+mailing list.