;;
  ;;  spreadspace pic utils
  ;;
  ;;
  ;;  Copyright (C) 2011-2013 Christian Pointner <equinox@spreadspace.org>
  ;;                         
  ;;  This file is part of spreadspace pic utils.
  ;;
  ;;  spreadspace pic utils is free software: you can redistribute it and/or modify
  ;;  it under the terms of the GNU General Public License as published by
  ;;  the Free Software Foundation, either version 3 of the License, or
  ;;  any later version.
  ;;
  ;;  spreadspace pic utils is distributed in the hope that it will be useful,
  ;;  but WITHOUT ANY WARRANTY; without even the implied warranty of
  ;;  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  ;;  GNU General Public License for more details.
  ;;
  ;;  You should have received a copy of the GNU General Public License
  ;;  along with spreadspace pic utils. If not, see <http://www.gnu.org/licenses/>.
  ;;
  ;; -------------------------------------
  ;; PREAMBLE

  LIST      p=16F887
  include   "p16f887.inc"
  __config  _CONFIG1,  _DEBUG_OFF & _LVP_OFF & _FCMEN_OFF & _IESO_OFF & _BOR_OFF & _CPD_OFF & _CP_OFF & _MCLRE_OFF & _PWRTE_OFF & _WDT_OFF & _INTOSCIO
  __config  _CONFIG2,  _BOR21V & _WRT_OFF

  ;; -------------------------------------
  ;; DEFINES
  
CNT0 EQU H'0020'
CNT1 EQU H'0021'

  ;; -------------------------------------
  ;; OFFSET
  org	      0

  ;; -------------------------------------
  ;; INIT
init
  bsf       STATUS,RP0
  bcf       STATUS,RP1
  movlw     b'00000110'
  movwf     ADCON1
  movlw     b'11111110'
  movwf     TRISA
  bcf       STATUS,RP0

  bcf       PORTA,0

  ;; -------------------------------------
  ;; MAINLOOP
main
  movlw     .255
  movwf     CNT0

outer
  movlw     .255
  movwf     CNT1

inner
  decfsz    CNT1,f
  goto      inner

  decfsz    CNT0,f
  goto      outer

  movlw     b'00000001'
  xorwf     PORTA,f

  goto	    main

  ;; -------------------------------------
  ;; END
  end