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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"
__config _CONFIG1, _DEBUG_OFF & _LVP_OFF & _FCMEN_OFF & _IESO_OFF & _BOR_NSLEEP & _CPD_OFF & _CP_OFF & _MCLRE_OFF & _PWRTE_ON & _WDT_OFF & _XT_OSC
__config _CONFIG2, _BOR21V & _WRT_OFF
;; -------------------------------------
;; DEFINES
;; constants
RTC_ADDR_W EQU b'11010000'
RTC_ADDR_R EQU b'11010001'
RTC_REG_SEC EQU H'00'
RTC_REG_MIN EQU H'01'
RTC_REG_HOUR EQU H'02'
RTC_REG_DOW EQU H'03'
RTC_REG_DOM EQU H'04'
RTC_REG_MON EQU H'05'
RTC_REG_YEAR EQU H'06'
RTC_REG_A1S EQU H'07'
RTC_REG_A1M EQU H'08'
RTC_REG_A1H EQU H'09'
RTC_REG_A1D EQU H'0A'
RTC_REG_A2M EQU H'0B'
RTC_REG_A2H EQU H'0C'
RTC_REG_A2D EQU H'0D'
RTC_REG_CON EQU H'0E'
RTC_REG_STAT EQU H'0F'
;; I/O Pins
;; PortA
SOLAR_C0 EQU 0
SOLAR_C1 EQU 1
SOLAR_C2 EQU 2
SOLAR_C3 EQU 3
OWIRE EQU 4
SOLAR_C4 EQU 5
;; PortB
DTMF_INT EQU 0
BAT_V EQU 1
SOLAR_V EQU 2
BAT_C EQU 3
RTC_SDA EQU 4
RTC_SCL EQU 5
RTC_INT EQU 6
MPU_INT EQU 7
;; PortC
MPU_PWRDWN EQU 0
MPU_RESET EQU 1
MPU_CS EQU 2
MPU_SCK EQU 3
MPU_SDI EQU 4
MPU_SDO EQU 5
ICOM_TX EQU 6
ICOM_RX EQU 7
;; PortD
DTMF_D0 EQU 0
DTMF_D1 EQU 1
DTMF_D2 EQU 2
DTMF_D3 EQU 3
DTMF_PWRDWN EQU 4
TTX_RESET EQU 5
TTX_SCL EQU 6
TTX_SDA EQU 7
;; PortE
SOLAR_C5 EQU 0
SOLAR_C6 EQU 1
SOLAR_C7 EQU 2
;; variables
;; page 0 only
TMP EQU H'0020'
TTX_BYTE EQU H'0021'
TTX_BIT_CNT EQU H'0022'
TTX_BYTE_CNT EQU H'0023'
TTX_CSUM EQU H'0024'
RTC_BYTE_CNT EQU H'0028'
WAIT_CNT EQU H'0030'
BUF EQU H'0040'
BUF_END EQU H'004F'
;; all pages
RTC_BYTE EQU H'0070'
RTC_BIT_CNT EQU H'0071'
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
btfsc PIR1,RCIF
goto int_uart_rx
goto interrupt_end
int_uart_rx
call uart_rx_byte
btfsc PIR1,RCIF
call uart_rx_byte
btfss RCSTA,OERR
goto int_uart_rx_oe
goto interrupt_end
int_uart_rx_oe
bcf RCSTA,CREN
bsf RCSTA,CREN
interrupt_end
;; restore context
swapf STATUS_TEMP,W
movwf STATUS
swapf W_TEMP,F
swapf W_TEMP,W
retfie
;; -------------------------------------
;; INIT
init
;; bank 3
bsf STATUS,RP0
bsf STATUS,RP1
movlw b'00000000'
movwf BAUDCTL
movlw b'00000111'
movwf ANSELH
;; bank 1
bsf STATUS,RP0
bcf STATUS,RP1
movlw b'11110000'
movwf WPUB
movlw b'11000000'
movwf IOCB
movlw b'01000001'
movwf OPTION_REG
clrf PSTRCON
movlw b'00010000'
movwf OSCCON
movlw b'11111111'
movwf TRISB
movlw b'11111000'
movwf TRISC
movlw b'10001111'
movwf TRISD
movlw b'00100100'
movwf TXSTA
movlw .12
movwf SPBRG
clrf SPBRGH
movlw b'00100000'
movwf PIE1
clrf PIE2
;; bank 0
bcf STATUS,RP0
bcf STATUS,RP1
movlw b'10010000'
movwf RCSTA
movlw B'01000000'
movwf INTCON
clrf PORTB
bsf PORTD,DTMF_PWRDWN
bcf PORTD,TTX_RESET ;reset TTX
nop
nop
bsf PORTD,TTX_RESET
bcf PORTD,TTX_SCL
bcf PORTD,TTX_SDA
clrf TMR0
bsf INTCON,GIE
clrf TMP
call rtc_init
goto main
;; -------------------------------------
;; TABLES
;; TODO: add lookup tables if needed
;; -------------------------------------
;; SUBROUTINES
wait_ms
movwf WAIT_CNT
wait_next
movlw .9
movwf TMR0
bcf INTCON,T0IF
wait_loop
btfss INTCON,T0IF
goto wait_loop
decfsz WAIT_CNT,f
goto wait_next
return
;; -------------------------------------
uart_rx_byte
btfsc RCSTA,FERR
goto uart_rx_fe
movf RCREG,w ; TODO: move to input string
movwf TMP
return
uart_rx_fe
movf RCREG,w
return
;; -------------------------------------
include "ttx.inc"
;; -------------------------------------
include "rtc.inc"
;; -------------------------------------
;; MAINLOOP
main
movf TMP,f
btfsc STATUS,Z
goto main
movlw BUF
movwf FSR
call rtc_get_time
clrf TMP
goto main
powerdown
sleep
nop
goto main
;; -------------------------------------
;; END
end
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