;***********************************************************
;*	This is the skeleton file for Lab 5 of ECE 375
;*
;*	 Author: Enter your name
;*	   Date: Enter Date
;*
;***********************************************************

.include "m32U4def.inc"			; Include definition file

;***********************************************************
;*	Internal Register Definitions and Constants
;***********************************************************
.def	mpr = r16				; Multipurpose register

.equ	WskrR = 0				; Right Whisker Input Bit
.equ	WskrL = 1				; Left Whisker Input Bit

;***********************************************************
;*	Start of Code Segment
;***********************************************************
.cseg							; Beginning of code segment

;***********************************************************
;*	Interrupt Vectors
;***********************************************************
.org	$0000					; Beginning of IVs
		rjmp 	INIT			; Reset interrupt

		; Set up interrupt vectors for any interrupts being used

		; This is just an example:
;.org	$002E					; Analog Comparator IV
;		rcall	HandleAC		; Call function to handle interrupt
;		reti					; Return from interrupt

.org	$0056					; End of Interrupt Vectors

;***********************************************************
;*	Program Initialization
;***********************************************************
INIT:							; The initialization routine
		; Initialize Stack Pointer

		; Initialize Port B for output

		; Initialize Port D for input

		; Initialize external interrupts
			; Set the Interrupt Sense Control to falling edge

		; Configure the External Interrupt Mask

		; Turn on interrupts
			; NOTE: This must be the last thing to do in the INIT function

;***********************************************************
;*	Main Program
;***********************************************************
MAIN:							; The Main program

		; TODO

		rjmp	MAIN			; Create an infinite while loop to signify the
								; end of the program.

;***********************************************************
;*	Functions and Subroutines
;***********************************************************

;-----------------------------------------------------------
;	You will probably want several functions, one to handle the
;	left whisker interrupt, one to handle the right whisker
;	interrupt, and maybe a wait function
;------------------------------------------------------------

;-----------------------------------------------------------
; Func: Template function header
; Desc: Cut and paste this and fill in the info at the
;		beginning of your functions
;-----------------------------------------------------------
FUNC:							; Begin a function with a label

		; Save variable by pushing them to the stack

		; Execute the function here

		; Restore variable by popping them from the stack in reverse order

		ret						; End a function with RET

;***********************************************************
;*	Stored Program Data
;***********************************************************

; Enter any stored data you might need here

;***********************************************************
;*	Additional Program Includes
;***********************************************************
; There are no additional file includes for this program