Here are a couple of exaples using the PCF8583 from other

http://www.decadenet.com/pub/kashin.txt which is part of a video overlay project at http://www.decadenet.com/bob2/bob2.html

This one is actually for Proton+ so may be a liitle confusing, but it is similar enough to hlp.
http://users.picbasic.org/projects/D...ata_logger.htm