Show and tell?
	Maybe
	I'll see if I can get ahold of it on wifi

If so:
	Powering the pi from batteries
	Distance sensors
	Motor control (PWM, servos, etc)

Real topic:  Putting assembly into C programs
	Can you work with the compiler?

Reference I used 8 years ago:
	http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html
	
Notes I wrote about it back then:
	Basic idea:
		asm("assembly")
		Can we change a register?  Sure!
	Extended asm:
		- It's useful to be able to refer to program variables
		- asm can have four sections
	assembler template: 
		- This is assembly code, but will be processed further
		- Template in CS:  Something which will be filled out later 
		- Use %% for regs here
		- %n for registers identified in input/output section
	output operands:
		- which variables are used for output from the template?
		- Example:  "=r"(foo), "=a"(bar)
			= is a modifier, means that the initial value of the variable is not used
		- "r" will let the compiler pick a register, "a" picks ax / eax / rax
	input operands:
		- Same thing, for input
	clobbered registers:
		- clobbering defined
		- gcc can work with you on the optimization
	volatile keyword

Let's make a new demo!
	
Lab:
	Make up a "what does this do" test question on assembly
	A later lab:  Figure out the answers to everyone else's program!