I2C Interface

[Arne]

Hi,

the OpenPCD reader's I2C interface only supports I2C master, what you
need is I2C slave.
Some of my student created a firmware that implements an I2C software
slave to use the RFID reader with LeJOS. I created a so far untended
Berlios project, which can be found here: http://rfid4lejos.berlios.de/
What also had to be done was to integrate an anti-collision algorithm
into the reader (we needed ISO15693).

While this is principally working I won't suggest this for you if your
main task isn't the integration of RFID readers. We had a lot of
problems but in the end it's working for us.
As far as I know there aren't many I2C readers available. I just
encountered the Skyetek M1 module, but I never managed getting it work
and the docs doesn't say to much. If you find any other, let me know.
Maybe it's a better idea to build an easy I2C-serial adapter with an
I2C-slave aware uC and connect it to one of the various serial RFID readers.

HTH
Arne