#include "P18F4455.INC"

LIGHTS_ON_OUT  EQU 30H
LIGHTS_OFF_OUT EQU 00H
CONST_BUTTON_PRESSED  EQU 0EH ; when button is pressed

CBLOCK 0X00
	VAR_BUTTON_PRESSED
	TEMP
	INC_VAR
ENDC

	ORG 0x00

	GOTO	MAIN_PROGRAM

#include "increment_proc.inc"

MAIN_PROGRAM:

	CALL	INCREMENT_PROC

;;;;;;;;;;;;;; CONFIGURE PORTA ;;;;;;;;;;;;
	CLRF	PORTA
	CLRF	LATA

	MOVLW	0Fh
	MOVWF	ADCON1

	MOVLW	07h
	MOVWF	CMCON

	MOVLW	0CFh
	MOVWF	TRISA
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

	MOVLW	CONST_BUTTON_PRESSED
	MOVWF	VAR_BUTTON_PRESSED

	MOVLW	0FH
	MOVWF	TEMP

MAIN_LOOP:

	MOVF	PORTA, W
	ANDWF	TEMP, W
	CPFSEQ	VAR_BUTTON_PRESSED
	GOTO	ON_BUTTON_NOT_PRESSED

	; if button is pressed
	MOVLW	LIGHTS_ON_OUT
	MOVWF	PORTA
	GOTO	MAIN_LOOP

ON_BUTTON_NOT_PRESSED:
	; if button is not pressed .. output lights off
	MOVLW	LIGHTS_OFF_OUT
	MOVWF	PORTA
	GOTO	MAIN_LOOP

	END