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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@spreadspace.org>
;;
;; 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=10F206
include "p10f206.inc"
__config _MCLRE_OFF & _CP_OFF & _WDT_OFF
;; -------------------------------------
;; DEFINES
BEACON_INT EQU .60
SECCNT EQU H'0008'
CWOUT EQU GP0
;; -------------------------------------
;; OFFSET
org 0
;; -------------------------------------
;; INIT
init
bcf CMCON0,CMPON
movlw b'11110110'
option
movlw b'11111110'
tris GPIO
bsf GPIO,CWOUT
clrf TMR0
movlw BEACON_INT
movwf SECCNT
goto main
;; -------------------------------------
;; SUBROUTINES
send_beacon
movlw b'00000001'
xorwf GPIO,f
return
;; -------------------------------------
;; MAINLOOP
main
movf TMR0,w
btfss STATUS,Z
goto main
;; this gets called every second
decfsz SECCNT,f
goto waitfor0
movlw BEACON_INT
movwf SECCNT
;; this gets called every BEACON_INT seconds
call send_beacon
;; is the timer above zero?
waitfor0
movf TMR0,w
btfsc STATUS,Z
goto waitfor0
goto main
;; -------------------------------------
;; END
end
|
