Forget Robotics for a moment. How comfortable are you with 8052 in the first place ?

If you are new to both, boy, then we have a major problem!!

OK I was just joking - in future when you post kinldy be specific and ask for one question at a time. That way the posting will be a help to you and all those like you.

I think Chris has already given you a ton to contend with.

Good Luck

Raghu