#include "P18F4455.INC"

	ORG	0X800

CONFIG_PINS:

	BSF		TRISA, 0 ; AN0
	BCF		TRISA, 2 ; VREF-
	BCF		TRISA, 3 ; VREF+

	BCF		TRISA, 4 ; FAN COMMAND
	BCF		TRISA, 5

	CLRF	TRISB
	CLRF	TRISD

	CLRF	PORTB
	
	MOVLW	0X0E
	MOVWF	ADCON1	; only AN0 channel as Analog (the rest digital)

	MOVLW	B'10000000'
	MOVWF	ADCON2
	;SETF	ADCON2

	MOVLW	B'00000011'
	MOVWF	ADCON0	; enable converter

	MOVLW	B'10000011'
	MOVWF	T0CON

	SETF	PORTA
	BSF		PORTA, 2
	BCF		PORTA, 3


WAIT:
	BTFSC	ADCON0, 1
	GOTO	WAIT

	BCF		INTCON, T0IF

DELAY:
	BTFSS	INTCON, T0IF
	GOTO	DELAY

	MOVFF	ADRESL, PORTB
	BSF		ADCON0, 1
	
	BTFSS	ADRESH, 0
	BCF		PORTD, 2

	BTFSC	ADRESH, 0
	BSF		PORTD, 2

	BTFSS	ADRESH, 1
	BCF		PORTD, 3

	BTFSC	ADRESH, 1
	BSF		PORTD, 3
	
;	BTG		PORTD, 2

	MOVLW	0X40
	CPFSGT	PORTB
	BRA		OFF

ON:
	BSF		PORTA, 4
	BRA		WAIT
OFF:
	BCF		PORTA, 4
	BRA		WAIT

	END