,,
So what is the problem ?
You need to give much more detail.
What device are you using ?
Can you provide a link to it or much more detail ?
How is it connected to the Arduino ?
How much experience of the Arduino do you have ?
The comments aren't very helpful - maybe if you commented what was being done, rather than how, it would be easier to port.
I'd start with a simple block wiring diagram, with functions (LCD, interrupt in etc) rather than actual ports and devices, to get a better idea of what has to be done.