;******************************************************************************
;   This file is a basic template for assembly code for a PIC18F1330. Copy    *
;   this file into your project directory and modify or add to it as needed.  *
;                                                                             *
;   Refer to the MPASM User's Guide for additional information on the         *
;   features of the assembler.                                                *
;                                                                             *
;                                                                             *
;******************************************************************************
;                                                                             *
;    Filename:                                                                *
;    Date:                                                                    *
;    File Version:                                                            *
;                                                                             *
;    Author:                                                                  *
;    Company:                                                                 *
;                                                                             *
;******************************************************************************
;                                                                             *
;    Files Required: P18F1330.INC                                             *
;                                                                             *
;******************************************************************************

    LIST P=18F1330      ;directive to define processor
    #include <P18F1330.INC> ;processor specific variable definitions

;******************************************************************************
;Configuration bits
;Microchip has changed the format for defining the configuration bits, please
;see the .inc file for futher details on notation.  Below are a few examples.


;   Oscillator Selection:
    CONFIG  OSC = INTIO2             ;INTERNAL OSCILLATOR, PORT FUNCTION ON RA6

;   Fail Safe Clock Monitor:
    CONFIG  FCMEN = OFF           ;Fail Safe Clock Monitor disabled

;   Power-Up Timer:
    CONFIG      PWRT = OFF           ;Disabled


;Oscillator Selection
    ;;  __CONFIG   _CONFIG1H, _OSC_LP_1H & _FCMEN_OFF_1H

;Fail Safe Monitor
    ;;  __CONFIG   _CONFIG2L, _PWRT_OFF_2L


;******************************************************************************
;Variable definitions
; These variables are only needed if low priority interrupts are used.
; More variables may be needed to store other special function registers used
; in the interrupt routines.

        CBLOCK  0x080
        WREG_TEMP   ;variable used for context saving
        STATUS_TEMP ;variable used for context saving
        BSR_TEMP    ;variable used for context saving

        ENDC

        CBLOCK  0x000
        EXAMPLE     ;example of a variable in access RAM
        COUNTER1    ;VARIABLE USED IN DELAY1
        COUNTER2_1  ;VARIABLE USED IN DELAY2
        COUNTER2_2  ;VARIABLE USED IN DELAY2
        ENDC

;******************************************************************************
;EEPROM data
; Data to be programmed into the Data EEPROM is defined here

        ORG 0xf00000

        DE  "Test Data",0,1,2,3,4,5

;******************************************************************************
;Reset vector
; This code will start executing when a reset occurs.

        ORG 0x0000

        goto    Main        ;go to start of main code

;******************************************************************************
;High priority interrupt vector
; This code will start executing when a high priority interrupt occurs or
; when any interrupt occurs if interrupt priorities are not enabled.

        ORG 0x0008

        bra HighInt     ;go to high priority interrupt routine

;******************************************************************************
;Low priority interrupt vector and routine
; This code will start executing when a low priority interrupt occurs.
; This code can be removed if low priority interrupts are not used.

        ORG 0x0018

        movff   STATUS,STATUS_TEMP  ;save STATUS register
        movff   WREG,WREG_TEMP      ;save working register
        movff   BSR,BSR_TEMP        ;save BSR register

;   *** low priority interrupt code goes here ***


        movff   BSR_TEMP,BSR        ;restore BSR register
        movff   WREG_TEMP,WREG      ;restore working register
        movff   STATUS_TEMP,STATUS  ;restore STATUS register
        retfie

;******************************************************************************
;High priority interrupt routine
; The high priority interrupt code is placed here to avoid conflicting with
; the low priority interrupt vector.

HighInt:

;   *** high priority interrupt code goes here ***


        retfie  FAST

;******************************************************************************
;Start of main program
; The main program code is placed here.

Main:

    MOVLW   0X01    ;select bank 1
    MOVWF   BSR
    MOVLW   b'00000000'
    MOVWF   TRISA
    GOTO    MAINLOOP
    MOVLW   0X00    ;select bank 0
    MOVWF   BSR

MAINLOOP:

    MOVLW   0X01
    MOVWF   PORTA,RA0
    CALL    DELAY1
    MOVLW   0X00
    MOVWF   PORTA,RA0
    CALL    DELAY2
    GOTO    MAINLOOP

DELAY1:

    MOVLW   0X0F
    MOVWF   COUNTER1

DELAY1_0:

    DECFSZ  COUNTER1
    GOTO    DELAY1_0
    RETURN

DELAY2:

    MOVLW   0X0E
    MOVWF   COUNTER2_1
    MOVLW   0X08
    MOVWF   COUNTER2_2

DELAY2_0:

    DECFSZ  COUNTER2_1
    GOTO    $+2
    DECFSZ  COUNTER2_2
    GOTO    DELAY2_0
    GOTO    $+2
    NOP
    NOP
    RETURN


;******************************************************************************
;End of program

        END