There is some Arduino DCF77 code in the playground. If that doesn't work for you, I have a library I use but haven't converted it to 0012 yet. Let me know if you need it and I will update and post it here
the link at the playground is pointing to the code I am already trying to get up and running. I've tried also to use another pull up resistor (4.7kOhm) but no success... :-/