EBC Exercise 30 PRU porting pasm to clpru

http://processors.wiki.ti.com/index.php/PRU_Assembly_Instructions#pasm_vs._clpru has better notes that I have here.

Here are some notes on things to watch for when converting from pasm assembly to clpru. Much of this came from http://www.ti.com/lit/ug/spruhv6a/spruhv6a.pdf