Used to do Vs Be used to doing

Used to do
"Used to do" is used to describe a habitual action in the past. Typically, the action is already finished in present time.
EG :
He used to play football every evening (he doesn't do so now)
He used to sleep early. (he doesn't do so now)

Be used to doing
"Be used to doing" is habitual action (present)
EG :
He is used to sleeping in class. (he still does it now...and does it frequently)
He is used to skipping 8.30 lectures (he still does it now)