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|
;;
;; mur.sat
;;
;; Somewhen in the year 2011, mur.at will have a nano satellite launched
;; into a low earth orbit (310 km above the surface of our planet). The
;; satellite itself is a TubeSat personal satellite kit, developed and
;; launched by interorbital systems. mur.sat is a joint venture of mur.at,
;; ESC im Labor and realraum.
;;
;; Please visit the project hompage at sat.mur.at for further information.
;;
;;
;; Copyright (C) 2011 Christian Pointner <equinox@mur.at>
;;
;; This file is part of mur.sat.
;;
;; mur.sat 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.
;;
;; mur.sat 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 mur.sat. If not, see <http://www.gnu.org/licenses/>.
;;
;; -------------------------------------
;; PREAMBLE
LIST p=16F887
include "p16f887.inc"
;; TODO: set correct configuration bits
__config _DEBUG_OFF & _LVP_OFF & _FCMEN_OFF & _IESO_OFF & _BOR_OFF & _CPD_OFF & _CP_OFF & _MCLRE_OFF & _PWRTE_OFF & _WDT_OFF & _XT_OSC
;; -------------------------------------
;; DEFINES
;; constants
;; I/O Pins
LED EQU 5
;; variables
;; page 0 only
CNT0 EQU H'0020'
CNT1 EQU H'0021'
;; all pages
W_TEMP EQU H'007E'
STATUS_TEMP EQU H'007F'
;; bits
;; -------------------------------------
;; Reset Vector
org 0
goto init
;; -------------------------------------
;; Interrupt Vector
org 4
;; save context
movwf W_TEMP
swapf STATUS,W
movwf STATUS_TEMP
bcf STATUS,RP0
bcf STATUS,RP1
;; TODO: implement interrupt service routines
interrupt_end
;; restore context
swapf STATUS_TEMP,W
movwf STATUS
swapf W_TEMP,F
swapf W_TEMP,W
retfie
;; -------------------------------------
;; INIT
init
;; bank 1
bsf STATUS,RP0
bcf STATUS,RP1
movlw b'11000111'
movwf OPTION_REG
clrf PSTRCON
movlw b'00010000'
movwf OSCCON
movlw b'11011111'
movwf TRISD
bcf STATUS,RP0
;; bank 0
bsf PORTD,LED
clrf TMR0
goto main
;; -------------------------------------
;; TABLES
;; TODO: add lookup tables if needed
;; -------------------------------------
;; SUBROUTINES
;; TODO: add subroutines
;; -------------------------------------
;; MAINLOOP
main
bcf INTCON,T0IF
loop
btfss INTCON,T0IF
goto loop
movlw b'00100000'
xorwf PORTD,f
goto main
powerdown
sleep
nop
goto main
;; -------------------------------------
;; END
end
|
