SuperCIC!
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ikari
parent
02d1b4027b
commit
c722b7914d
880
cic/supercic/supercic-lock.asm
Normal file
880
cic/supercic/supercic-lock.asm
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@ -0,0 +1,880 @@
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#include <p16f630.inc>
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processor p16f630
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; ---------------------------------------------------------------------
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; feature enhanced auto region switching SNES CIC clone
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; for PIC Microcontrollers (lock mode)
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;
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; Copyright (C) 2010 by Maximilian Rehkopf (ikari_01) <otakon@gmx.net>
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; This software is part of the sd2snes project.
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;
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; This program is free software; you can redistribute it and/or modify
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; it under the terms of the GNU General Public License as published by
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; the Free Software Foundation; version 2 of the License only.
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;
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; This program is distributed in the hope that it will be useful,
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; but WITHOUT ANY WARRANTY; without even the implied warranty of
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; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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; GNU General Public License for more details.
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;
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; You should have received a copy of the GNU General Public License
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; along with this program; if not, write to the Free Software
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; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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;
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; ---------------------------------------------------------------------
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;
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; pin configuration: (cartridge slot pin) [original 18-pin SMD lock CIC pin]
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;
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;
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; ,-----_-----.
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; +5V (27,58) [18] |1 14| GND (5,36) [9]
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; CIC clk (56) [7] |2 A5 A0 13| CIC lock reset in [8]
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; |3 A4 A1 12| 50/60Hz out
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; |4 A3 A2 11| host reset out [10]
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; LED out (red) |5 C5 C0 10| CIC data i/o 0 (55) [1]
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; LED out (grn) |6 C4 C1 9| CIC data i/o 1 (24) [2]
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; |7 C3 C2 8| CIC slave reset out (25) [11]
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; `-----------'
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;
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; PORTA: in in in out out in
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; PORTC: out out in out out in
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;
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; pin 11 connected to PPU2 reset in
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; pin 13 connected to reset button
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; pin 8 connected to key CIC pin 7 (or clone CIC pin 5)
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; pin 9 connected to key CIC pin 1 (or clone CIC pin 6)
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; pin 10 connected to key CIC pin 2 (or clone CIC pin 7)
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;
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; Host reset out behaves as follows:
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; After powerup it is held low for a couple of us to properly allow the
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; components to power-up.
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; It is then asserted a high level even if the CIC "auth" should fail at
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; any point, thus enabling homebrew or other cartridges without a CIC or
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; CIC clone to be run properly while maintaining compatibility with CIC
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; demanding cartridges like S-DD1 or SA-1 powered ones.
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; The type of key CIC (411/413) is detected automatically.
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;
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; memory usage:
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; -------------------basic CIC functions--------------------
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; 0x20 buffer for seed calc and transfer
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; 0x21 - 0x2f seed area (lock seed)
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; 0x30 buffer for seed calc
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; 0x31 - 0x3f seed area (key seed; 0x31 filled in by lock)
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; 0x40 - 0x41 buffer for seed calc
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; 0x42 input buffer
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; 0x43 variable for key detect
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; 0x4d buffer for eeprom access
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; 0x4e loop variable for longwait
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; 0x4f loop variable for wait
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;
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; -------------------SuperCIC extensions--------------------
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; 0x50 power LED state (no bits except 4 and 5 must be set!!)
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; 0x51 last reset button state
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; 0x52 mode dirty flag
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; 0x53 tmr overflow counter
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; 0x54 region output (0: 60Hz, 2: 50Hz)
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; 0x55 final mode setting
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; 0x56 temp LED state
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; 0x57 detected mode (0: 60Hz, 2: 50Hz)
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; 0x58 forced mode (0: 60Hz, 2: 50Hz)
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;
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; ---------------------------------------------------------------------
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; -----------------------------------------------------------------------
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__CONFIG _EC_OSC & _WDT_OFF & _PWRTE_OFF & _MCLRE_OFF & _CP_OFF & _CPD_OFF
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; -----------------------------------------------------------------------
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; code memory
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org 0x0000
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nop
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nop
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nop
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goto init
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trap
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org 0x0004
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goto trap
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rst ; we jump here after powerup or RC0=1
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bcf PORTC, 0 ; clear stream i/o
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bcf PORTC, 1 ; clear stream i/o
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bcf PORTC, 2 ; disable slave reset
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bcf PORTA, 2 ; hold the SNES in reset
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movlw 0x30 ; prescaler 1:8
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movwf T1CON ;
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clrf PIR1
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rst_loop
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btfsc PORTA, 0 ; stay in "reset" as long as RA0=1
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goto rst_loop
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clrf 0x51 ; clear reset button state
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clrf 0x52 ; clear modechange flag
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clrf 0x53
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clrf 0x54 ; clear user mode
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clrf 0x57 ; clear key mode
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clrf 0x58 ; clear forced mode
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banksel EEADR ; fetch current mode from EEPROM
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clrf EEADR ; address 0
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bsf EECON1, RD ;
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movf EEDAT, w ;
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banksel PORTA
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movwf 0x55 ; store saved mode in mode var
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movwf 0x56 ; and temp LED
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movwf 0x50 ; and final LED
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movlw 0x3 ; mask
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andwf 0x50, f ;
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swapf 0x50, f ; and nibbleswap for actual output
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clrf PIR1 ; reset overflow bit
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clrf TMR1L ; reset counter
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clrf TMR1H
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bsf T1CON, 0 ; start the timer
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goto main ; go go go
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init
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banksel PORTA
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clrf PORTA
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movlw 0x07 ; GPIO2..0 are digital I/O (not connected to comparator)
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movwf CMCON
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movlw 0x00 ; disable all interrupts
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movwf INTCON
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banksel TRISA
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movlw 0x39 ; in in in out out in
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movwf TRISA
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movlw 0x09 ; out out in out out in
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movwf TRISC
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movlw 0x00 ; no pullups
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movwf WPUA
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movlw 0x80 ; global pullup disable
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movwf OPTION_REG
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banksel PORTA
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bcf PORTA, 2 ; hold SNES in reset
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goto rst
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main
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movlw 0x40 ; wait a bit before initializing the slave + console
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call longwait
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nop
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bsf PORTC, 2 ; trigger the slave
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nop
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nop
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bcf PORTC, 2
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banksel TRISC
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bcf TRISC, 0
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bsf TRISC, 1
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banksel PORTC
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; --------INIT LOCK SEED (what we must send)--------
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movlw 0xb
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movwf 0x21
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movlw 0x1
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movwf 0x22
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movlw 0x4
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movwf 0x23
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movlw 0xf
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movwf 0x24
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movlw 0x4
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movwf 0x25
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movlw 0xb
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movwf 0x26
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movlw 0x5
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movwf 0x27
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movlw 0x7
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movwf 0x28
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movlw 0xf
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movwf 0x29
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movlw 0xd
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movwf 0x2a
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movlw 0x6
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movwf 0x2b
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movlw 0x1
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movwf 0x2c
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movlw 0xe
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movwf 0x2d
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movlw 0x9
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movwf 0x2e
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movlw 0x8
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movwf 0x2f
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; --------INIT KEY SEED (what the key sends)--------
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movlw 0xf ; we always request the same stream for simplicity
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movwf 0x31
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movlw 0x0 ; this is filled in by key autodetect
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movwf 0x32
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movlw 0xa
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movwf 0x33
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movlw 0x1
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movwf 0x34
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movlw 0x8
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movwf 0x35
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movlw 0x5
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movwf 0x36
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movlw 0xf
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movwf 0x37
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movlw 0x1
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movwf 0x38
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movwf 0x39
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movlw 0xe
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movwf 0x3a
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movlw 0x1
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movwf 0x3b
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movlw 0x0
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movwf 0x3c
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movlw 0xd
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movwf 0x3d
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movlw 0xe
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movwf 0x3e
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movlw 0xc
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movwf 0x3f
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; --------wait before sending stream ID--------
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movlw 0xba
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call wait
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nop
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nop
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; --------lock sends stream ID. 15 cycles per bit--------
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; bsf GPIO, 0 ; (debug marker)
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; bcf GPIO, 0 ;
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btfsc 0x31, 3 ; read stream select bit
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bsf PORTC, 0 ; send bit
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nop
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nop
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bcf PORTC, 0
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movlw 0x1 ; wait=7
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call wait ; burn 10 cycles
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nop
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nop
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; bsf GPIO, 0
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; bcf GPIO, 0
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btfsc 0x31, 0 ; read stream select bit
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bsf PORTC, 0 ; send bit
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nop
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nop
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bcf PORTC, 0
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movlw 0x1 ; wait=3*W+5
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call wait ; burn 11 cycles
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nop
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nop
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; bsf GPIO, 0
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; bcf GPIO, 0
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btfsc 0x31, 1 ; read stream select bit
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bsf PORTC, 0 ; send bit
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nop
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nop
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bcf PORTC, 0
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movlw 0x1 ; wait=3*W+5
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call wait ; burn 11 cycles
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nop
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nop
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; bsf GPIO, 0
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; bcf GPIO, 0
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btfsc 0x31, 2 ; read stream select bit
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bsf PORTC, 0 ; send bit
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nop
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nop
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bcf PORTC, 0
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movlw 0x1 ; wait=3*0+7
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call wait ; burn 10 cycles
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banksel TRISC
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bsf TRISC, 0
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bcf TRISC, 1
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banksel PORTC
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movlw 0x24 ; "wait" 1
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call wait ; wait 112
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; nop
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movlw 0x1 ; 'first time' bit
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movwf 0x43 ; for key detection
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; --------main loop--------
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loop
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movlw 0x1
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loop0
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addlw 0x20 ; lock stream
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movwf FSR ; store in index reg
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loop1
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movf INDF, w ; load seed value
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movwf 0x20
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bcf 0x20, 1 ; clear bit 1
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btfsc 0x20, 0 ; copy from bit 0
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bsf 0x20, 1 ; (if set)
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nop ; bsf 0x20, 4 ; run console
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nop ; bcf 0x20, 2 ; run slave
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movf 0x50, w ; get LED state
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iorwf 0x20, f ; combine with data i/o
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movf 0x20, w
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movwf PORTC
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movf PORTC, w ; read input
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movwf 0x42 ; store input
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movf 0x50, w ; get LED state
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movwf PORTC ; reset GPIO
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call checkkey
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call checkrst
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call checktmr
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movlw 0x10 ; wait 52 cycles
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call wait
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btfsc PORTC, 0 ; both pins must be low...
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nop; goto die
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btfsc PORTC, 1 ; ...when no bit transfer takes place
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nop; goto die ; if not -> lock cic error state -> die
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incf FSR, f ; next one
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movlw 0xf
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andwf FSR, w
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btfss STATUS, Z
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goto loop1
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movlw 0x1 ; wait 7
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call wait ;
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nop
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nop
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call mangle
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call mangle
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call mangle
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btfsc 0x37, 0
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goto swap
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banksel TRISC
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bsf TRISC, 0
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bcf TRISC, 1
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goto swapskip
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swap
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banksel TRISC
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bcf TRISC, 0
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bsf TRISC, 1
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nop
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swapskip
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banksel PORTA
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bsf 0x54, 2 ; run the console
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movf 0x54, w ; read resolved mode
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movwf PORTA
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clrf 0x43 ; don't check key region anymore
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movf 0x37, w
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andlw 0xf
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btfss STATUS, Z
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goto loop0
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goto loop
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; --------calculate new seeds--------
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; had to be unrolled because PIC has an inefficient way of handling
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; indirect access, no post increment, no swap, etc.
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mangle
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call mangle_lock
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nop
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nop
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mangle_key
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movf 0x2f, w
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movwf 0x20
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mangle_key_loop
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addlw 0x1
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addwf 0x21, f
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movf 0x22, w
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movwf 0x40
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movf 0x21, w
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addwf 0x22, f
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incf 0x22, f
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comf 0x22, f
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movf 0x23, w
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movwf 0x41 ; store 23 to 41
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movlw 0xf
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andwf 0x23, f
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movf 0x40, w ; add 40(22 old)+23+#1 and skip if carry
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andlw 0xf
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addwf 0x23, f
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incf 0x23, f
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btfsc 0x23, 4
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goto mangle_key_withskip
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mangle_key_withoutskip
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movf 0x41, w ; restore 23
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addwf 0x24, f ; add to 24
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movf 0x25, w
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movwf 0x40 ; save 25 to 40
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movf 0x24, w
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addwf 0x25, f
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movf 0x26, w
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movwf 0x41 ; save 26 to 41
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movf 0x40, w ; restore 25
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andlw 0xf ; mask nibble
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addlw 0x8 ; add #8 to HIGH nibble
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movwf 0x40
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btfss 0x40, 4 ; skip if carry to 5th bit
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addwf 0x26, w
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movwf 0x26
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movf 0x41, w ; restore 26
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addlw 0x1 ; inc
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addwf 0x27, f ; add to 27
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movf 0x27, w ;
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addlw 0x1 ; inc
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addwf 0x28, f ; add to 28
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movf 0x28, w ;
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addlw 0x1 ; inc
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addwf 0x29, f ; add to 29
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movf 0x29, w ;
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addlw 0x1 ; inc
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addwf 0x2a, f ; add to 2a
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movf 0x2a, w ;
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addlw 0x1 ; inc
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addwf 0x2b, f ; add to 2b
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movf 0x2b, w ;
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addlw 0x1 ; inc
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addwf 0x2c, f ; add to 2c
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movf 0x2c, w ;
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addlw 0x1 ; inc
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addwf 0x2d, f ; add to 2d
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movf 0x2d, w ;
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addlw 0x1 ; inc
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addwf 0x2e, f ; add to 2e
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movf 0x2e, w ;
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addlw 0x1 ; inc
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addwf 0x2f, f ; add to 2f
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movf 0x20, w ; restore original 0xf
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andlw 0xf
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addlw 0xf
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movwf 0x20
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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btfss 0x20, 4 ; skip if half-byte carry
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goto mangle_return ; +2 cycles in return
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nop
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goto mangle_key_loop
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; 69 when goto, 69 when return
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; CIC has 78 -> 9 nops
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mangle_key_withskip
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movf 0x41, w ; restore 23
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addwf 0x23, f ; add to 23
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movf 0x24, w
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movwf 0x40 ; save 24 to 40
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movf 0x23, w
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addwf 0x24, f
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movf 0x25, w
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movwf 0x41 ; save 25 to 41
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movf 0x40, w ; restore 24
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andlw 0xf ; mask nibble
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addlw 0x8 ; add #8 to HIGH nibble
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movwf 0x40
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btfss 0x40, 4 ; skip if carry to 5th bit
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addwf 0x25, w
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movwf 0x25
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movf 0x41, w ; restore 25
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addlw 0x1 ; inc
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addwf 0x26, f ; add to 26
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movf 0x26, w ;
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addlw 0x1 ; inc
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addwf 0x27, f ; add to 27
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movf 0x27, w ;
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addlw 0x1 ; inc
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addwf 0x28, f ; add to 28
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movf 0x28, w ;
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addlw 0x1 ; inc
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addwf 0x29, f ; add to 29
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movf 0x29, w ;
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addlw 0x1 ; inc
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addwf 0x2a, f ; add to 2a
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movf 0x2a, w ;
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addlw 0x1 ; inc
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addwf 0x2b, f ; add to 2b
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movf 0x2b, w ;
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addlw 0x1 ; inc
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addwf 0x2c, f ; add to 2c
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||||
movf 0x2c, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x2d, f ; add to 2d
|
||||
|
||||
movf 0x2d, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x2e, f ; add to 2e
|
||||
|
||||
movf 0x2e, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x2f, f ; add to 2f
|
||||
|
||||
movf 0x20, w ; restore original 0xf
|
||||
andlw 0xf
|
||||
addlw 0xf
|
||||
movwf 0x20
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
btfss 0x20, 4 ; skip if half-byte carry
|
||||
goto mangle_return ; +2 cycles in return
|
||||
nop
|
||||
goto mangle_key_loop
|
||||
mangle_return
|
||||
return
|
||||
; 73 when goto, 73 when return
|
||||
; CIC has 84 -> 11 nops
|
||||
|
||||
mangle_lock
|
||||
movf 0x3f, w
|
||||
movwf 0x30
|
||||
mangle_lock_loop
|
||||
addlw 0x1
|
||||
addwf 0x31, f
|
||||
movf 0x32, w
|
||||
movwf 0x40
|
||||
movf 0x31, w
|
||||
addwf 0x32, f
|
||||
incf 0x32, f
|
||||
comf 0x32, f
|
||||
movf 0x33, w
|
||||
movwf 0x41 ; store 33 to 41
|
||||
movlw 0xf
|
||||
andwf 0x33, f
|
||||
movf 0x40, w ; add 40(32 old)+33+#1 and skip if carry
|
||||
andlw 0xf
|
||||
addwf 0x33, f
|
||||
incf 0x33, f
|
||||
btfsc 0x33, 4
|
||||
goto mangle_lock_withskip
|
||||
mangle_lock_withoutskip
|
||||
movf 0x41, w ; restore 33
|
||||
addwf 0x34, f ; add to 34
|
||||
movf 0x35, w
|
||||
movwf 0x40 ; save 35 to 40
|
||||
movf 0x34, w
|
||||
addwf 0x35, f
|
||||
movf 0x36, w
|
||||
movwf 0x41 ; save 36 to 41
|
||||
movf 0x40, w ; restore 35
|
||||
andlw 0xf ; mask nibble
|
||||
addlw 0x8 ; add #8 to HIGH nibble
|
||||
movwf 0x40
|
||||
btfss 0x40, 4 ; skip if carry to 5th bit
|
||||
addwf 0x36, w
|
||||
movwf 0x36
|
||||
|
||||
movf 0x41, w ; restore 36
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x37, f ; add to 37
|
||||
|
||||
movf 0x37, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x38, f ; add to 38
|
||||
|
||||
movf 0x38, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x39, f ; add to 39
|
||||
|
||||
movf 0x39, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3a, f ; add to 3a
|
||||
|
||||
movf 0x3a, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3b, f ; add to 3b
|
||||
|
||||
movf 0x3b, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3c, f ; add to 3c
|
||||
|
||||
movf 0x3c, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3d, f ; add to 3d
|
||||
|
||||
movf 0x3d, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3e, f ; add to 3e
|
||||
|
||||
movf 0x3e, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3f, f ; add to 3f
|
||||
|
||||
movf 0x30, w ; restore original 0xf
|
||||
andlw 0xf
|
||||
addlw 0xf
|
||||
movwf 0x30
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
btfss 0x30, 4 ; skip if half-byte carry
|
||||
goto mangle_return
|
||||
nop
|
||||
goto mangle_lock_loop
|
||||
; 69 when goto, 69 when return
|
||||
; CIC has 78 -> 9 nops
|
||||
|
||||
mangle_lock_withskip
|
||||
movf 0x41, w ; restore 33
|
||||
addwf 0x33, f ; add to 33
|
||||
movf 0x34, w
|
||||
movwf 0x40 ; save 34 to 40
|
||||
movf 0x33, w
|
||||
addwf 0x34, f
|
||||
movf 0x35, w
|
||||
movwf 0x41 ; save 35 to 41
|
||||
movf 0x40, w ; restore 34
|
||||
andlw 0xf ; mask nibble
|
||||
addlw 0x8 ; add #8 to HIGH nibble
|
||||
movwf 0x40
|
||||
btfss 0x40, 4 ; skip if carry to 5th bit
|
||||
addwf 0x35, w
|
||||
movwf 0x35
|
||||
|
||||
movf 0x41, w ; restore 35
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x36, f ; add to 36
|
||||
|
||||
movf 0x36, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x37, f ; add to 37
|
||||
|
||||
movf 0x37, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x38, f ; add to 38
|
||||
|
||||
movf 0x38, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x39, f ; add to 39
|
||||
|
||||
movf 0x39, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3a, f ; add to 3a
|
||||
|
||||
movf 0x3a, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3b, f ; add to 3b
|
||||
|
||||
movf 0x3b, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3c, f ; add to 3c
|
||||
|
||||
movf 0x3c, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3d, f ; add to 3d
|
||||
|
||||
movf 0x3d, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3e, f ; add to 3e
|
||||
|
||||
movf 0x3e, w ;
|
||||
addlw 0x1 ; inc
|
||||
addwf 0x3f, f ; add to 3f
|
||||
|
||||
movf 0x30, w ; restore original 0xf
|
||||
andlw 0xf
|
||||
addlw 0xf
|
||||
movwf 0x30
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
btfss 0x30, 4 ; skip if half-byte carry
|
||||
goto mangle_return
|
||||
nop
|
||||
goto mangle_lock_loop
|
||||
; 73 when goto, 73 when return
|
||||
; CIC has 84 -> 11 nops
|
||||
|
||||
; --------wait: 3*(W-1)+7 cycles (including call+return). W=0 -> 256!--------
|
||||
wait
|
||||
movwf 0x4f
|
||||
wait0 decfsz 0x4f, f
|
||||
goto wait0
|
||||
return
|
||||
|
||||
; --------wait long: 8+(3*(w-1))+(772*w). W=0 -> 256!--------
|
||||
longwait
|
||||
movwf 0x4e
|
||||
clrw
|
||||
longwait0
|
||||
call wait
|
||||
decfsz 0x4e, f
|
||||
goto longwait0
|
||||
return
|
||||
|
||||
; --------die (do nothing, wait for reset)--------
|
||||
die
|
||||
btfsc PORTA, 0
|
||||
goto rst
|
||||
goto die
|
||||
|
||||
; --------check the key input and change "region" when appropriate--------
|
||||
; --------requires 17 cycles (incl. call+return)
|
||||
checkkey
|
||||
btfss 0x43, 0 ; first time?
|
||||
goto checkkey_nocheck ; if not, just burn some cycles
|
||||
movlw 0x22 ; are we at the correct stream offset?
|
||||
xorwf FSR, w
|
||||
btfss STATUS, Z ; if not equal:
|
||||
goto checkkey_nocheck2 ; burn some cycles less.
|
||||
; if equal do the check
|
||||
btfss 0x42, 0 ; if value from slave is set it's a 411
|
||||
goto checkkey_413
|
||||
checkkey_411
|
||||
nop ; to compensate for untaken branch
|
||||
bcf 0x57, 1 ; set detected mode (60Hz)
|
||||
bcf 0x54, 1 ; set output mode (60Hz)
|
||||
movlw 0x9
|
||||
goto checkkey_save
|
||||
checkkey_413
|
||||
bsf 0x57, 1 ; set detected mode (50Hz)
|
||||
bsf 0x54, 1 ; set output mode (50Hz)
|
||||
movlw 0x6
|
||||
goto checkkey_save
|
||||
|
||||
checkkey_nocheck
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
checkkey_nocheck2
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
nop
|
||||
goto checkkey_done
|
||||
checkkey_save
|
||||
movwf 0x32
|
||||
checkkey_done
|
||||
return
|
||||
|
||||
; -------- check reset button, update status LEDs, etc.
|
||||
checkrst
|
||||
movf PORTA, w
|
||||
btfss 0x51, 0
|
||||
goto checkrst_0
|
||||
checkrst_1
|
||||
movwf 0x51
|
||||
btfsc 0x51, 0
|
||||
goto checkrst_1_1
|
||||
checkrst_1_0
|
||||
; if modechange flag is set: clear modechange flag, set mode, save, restart timer
|
||||
; else reset
|
||||
btfss 0x52, 0
|
||||
goto rst ; modechange flag is not set, reset. timing is irrelevant
|
||||
clrf 0x52 ; clear modechange flag
|
||||
movf 0x56, w ; get temp mode
|
||||
movwf 0x55 ; set final mode
|
||||
movwf 0x58
|
||||
banksel EEADR ; save to EEPROM
|
||||
movwf EEDAT
|
||||
bsf EECON1,WREN
|
||||
movlw 0x55
|
||||
movwf EECON2
|
||||
movlw 0xaa
|
||||
movwf EECON2
|
||||
bsf EECON1, WR
|
||||
banksel PORTA
|
||||
movlw 0x2
|
||||
andwf 0x58, f
|
||||
bcf T1CON, 0 ; stop the timer
|
||||
clrf PIR1 ; reset overflow bit
|
||||
clrf TMR1L ; reset counter
|
||||
clrf TMR1H
|
||||
bsf T1CON, 0 ; restart the timer
|
||||
goto checkrst_end
|
||||
checkrst_1_1
|
||||
; check TMR overflow
|
||||
; if overflow, change LED, reset TMR+overflow, set modechange flag
|
||||
; else do nothing
|
||||
btfss PIR1, 0
|
||||
goto checkrst_end
|
||||
bcf T1CON, 0 ; stop the timer
|
||||
clrf PIR1 ; reset overflow bit
|
||||
clrf TMR1L ; reset counter
|
||||
clrf TMR1H
|
||||
bsf T1CON, 0 ; restart the timer
|
||||
incf 0x56, f ; change tmp LED/mode
|
||||
movlw 0x5
|
||||
btfsc 0x56, 2 ; if 4:
|
||||
xorwf 0x56, f ; change back to 1
|
||||
movf 0x56, w
|
||||
andlw 0x03 ; mask
|
||||
movwf 0x50
|
||||
swapf 0x50, f ; adjust for GPIO pins
|
||||
bsf 0x52, 0 ; set modechange flag
|
||||
goto checkrst_end
|
||||
|
||||
checkrst_0
|
||||
movwf 0x51
|
||||
btfsc 0x51, 0
|
||||
goto checkrst_0_1
|
||||
checkrst_0_0
|
||||
; count some overflows, change region from detected to forced unless auto
|
||||
btfsc 0x53, 4 ; past delay?
|
||||
goto checkrst_0_0_setregion
|
||||
btfss PIR1, 0
|
||||
goto checkrst_end
|
||||
clrf PIR1
|
||||
incf 0x53, f ; increment overflow counter
|
||||
btfss 0x53, 4 ; 0x10 reached?
|
||||
goto checkrst_end
|
||||
checkrst_0_0_setregion
|
||||
movlw 0x3
|
||||
xorwf 0x55, w ; mode=auto?
|
||||
btfss STATUS, Z
|
||||
goto checkrst_0_0_setregion_forced
|
||||
checkrst_0_0_setregion_auto
|
||||
movf 0x57, w ; get detected region
|
||||
goto checkrst_0_0_setregion_save
|
||||
checkrst_0_0_setregion_forced
|
||||
movf 0x58, w ; get forced region
|
||||
checkrst_0_0_setregion_save
|
||||
movwf 0x54 ; set to output
|
||||
goto checkrst_end
|
||||
|
||||
checkrst_0_1
|
||||
; reset + start TMR, reset TMR overflow
|
||||
clrf TMR1L ; reset timer register
|
||||
clrf TMR1H
|
||||
clrf PIR1 ; clear overflow bit
|
||||
bsf T1CON, 0
|
||||
|
||||
checkrst_end
|
||||
return
|
||||
checktmr ; TODO
|
||||
return
|
||||
; -----------------------------------------------------------------------
|
||||
; eeprom data
|
||||
DEEPROM CODE
|
||||
de 0x01 ;current mode (default: 60Hz)
|
||||
end
|
||||
; ------------------------------------------------------------------------
|
||||
Loading…
x
Reference in New Issue
Block a user