Most bare-bones application to show the use of timers. Not clean, but very simple, concise, and contained to this directory. Uses the armtimer interrupt to tick at 1Hz and toggles the ACT LED as well as displaying on console.

Authors: Dawson Engler engler@cs.stanford.edu Philip Levis pal@cs.stanford.edu Date: 5/18/17

Why are sp and lr special?

sub lr, lr, #4 // re-execute instruction