; Include file, change directory if needed
    #include "p12f675.inc"

;#########################
;## uC Chip settings	##
;#########################
;   Set User ID Memory
	__idlocs		0x55aa
;   Set configuration bits using definitions from the include file, p16f84.inc
	__config	_INTRC_OSC_NOCLKOUT & _WDT_OFF & _CP_OFF & _MCLRE_OFF


;#########################
;## PIN DEFINITIONS	##
;#########################
; GP5	I/O     	()
; GP4	I/O			()
; GP3	nMCLR		()
; GP2	I/O			()
; GP1	OUT	LED1	()
; GP0	OUT LED0	()
LED1_P		EQU	b'111111'


; OUTPUTs
LED1	EQU	GP0
LED0    EQU GP1


; INPUTs

;#########################
;## CONSTANTS		##
;#########################

;#########################
;## GLOBAL REGISTERS	##
;#########################
tmp	EQU	0x20		; Temporary register
count_l	EQU	0x21		;
count_h	EQU	0x22		;

;#########################
;## MACROS		##
;#########################
    #define	PAGE0		bcf	STATUS,RP0	; [M] Switch to page 0 in RAM
    #define PAGE1		bsf	STATUS,RP0	; [M] Switch to page 1 in RAM

;###################################################################################
;###################################################################################
;####			S	T	A	R	T			####
;###################################################################################
;###################################################################################
;Initialization of basic registers
Reset_vector	org	0x0000
	goto	Init

Irq_vector	org	0x0004
    PAGE0
 	movlw	0b01    ; show that interrupt is OK
    bcf     PIR1, EEIF
	PAGE1
	movlw	0x11		; Read address 0x10 from EEPROM
	movwf	EEADR
	bsf		EECON1,RD
	movf	EEDATA,W	; and store it to tmp


    PAGE0
	movwf	GPIO
    retfie

Init
; ##############
; Adjust osc calibration constant, read it from EEPROM

	PAGE1				; Set page 0
	call	0x3ff
	movwf	OSCCAL			; Read osc calibration value and set it
	PAGE0

	movlw	0x07
	movwf	CMCON           ; Disable comparator

    PAGE1
    movlw   0x00
    movwf   ANSEL           ; Disable ADC

    movlw   0x00
    movwf   ADCON0          ; Disable ADC
    PAGE0

	clrwdt				; Reset watchdog
;###############
; Set Inputs/Outputs
	PAGE1
	movlw	~(LED1_P)		; LED1 will be output
	movwf	TRISIO			; Set direction
	PAGE0
; Set GPIO
	movlw	0x00
	movwf	GPIO			; Turn off LED1 and 2 leds, turn on LED3

; configure interrupts
    PAGE1
    bsf     PIE1, EEIE
    PAGE0
    bsf     INTCON, PEIE
    bcf     INTCON, GIE

;wait a bit
;    call wait

;###############
; Read LED state from EEPROM and invert it:
	PAGE1
	movlw	0x11		; Read address 0x10 from EEPROM
	movwf	EEADR
	bsf		EECON1,RD
	movf	EEDATA,W	; and store it to tmp
    addlw   0x01
    PAGE0
	movwf	tmp

    ;incf    tmp         ; increment value by one

; Set GPIO state - all on
	;PAGE0
    ;movlw   0xff
	;movwf	GPIO



; Write back new value:
    movfw   tmp
	PAGE1
	movwf	EEDATA		; Set EEPROM address and data to write
	movlw	0x11
	movfw	EEADR
	bsf 	EECON1,WREN	; Enable write

	movlw	0x55		; Unlock write
	movwf	EECON2
	movlw	0xAA
	movwf	EECON2
	bsf		EECON1,WR	; Write
    bsf     INTCON, GIE

;Loop:					; Wait until the value is written successfully
	;btfsc	EECON1,WR
	;goto	Loop

;#######################################
; MAIN LOOP
;#######################################
	goto	$

wait:
	clrw
	movwf	count_l
	movlw	0x40
	movwf	count_h			; Set counter to 0x40
M_L1:
	incfsz	count_l			; inner loop
	goto	M_L1
	incfsz	count_h			; outer loop
	goto 	M_L1
    return



	end