231 lines
7 KiB
C++
231 lines
7 KiB
C++
/*
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* Copyright (C) 2002-2007 The DOSBox Team
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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; either version 2 of the License, or
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* (at your option) any later version.
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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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/* $Id: joystick.cpp,v 1.20 2008-10-05 14:44:52 qbix79 Exp $ */
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#include <string.h>
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#include "dosbox.h"
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#include "inout.h"
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#include "setup.h"
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#include "joystick.h"
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#include "pic.h"
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#include "support.h"
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#define RANGE 64
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#define TIMEOUT 10
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#define OHMS 120000/2
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#define JOY_S_CONSTANT 0.0000242
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#define S_PER_OHM 0.000000011
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struct JoyStick {
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bool enabled;
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float xpos,ypos;
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double xtick,ytick;
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Bitu xcount,ycount;
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bool button[2];
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};
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JoystickType joytype;
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static JoyStick stick[2];
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static Bit32u last_write = 0;
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static bool write_active = false;
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static bool swap34 = false;
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bool button_wrapping_enabled = true;
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extern bool autofire; //sdl_mapper.cpp
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static Bitu read_p201(Bitu port,Bitu iolen) {
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/* Reset Joystick to 0 after TIMEOUT ms */
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if(write_active && ((PIC_Ticks - last_write) > TIMEOUT)) {
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write_active = false;
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stick[0].xcount = 0;
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stick[1].xcount = 0;
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stick[0].ycount = 0;
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stick[1].ycount = 0;
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// LOG_MSG("reset by time %d %d",PIC_Ticks,last_write);
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}
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/** Format of the byte to be returned:
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** | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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** +-------------------------------+
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** | | | | | | | |
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** Joystick B, Button 2 ---+ | | | | | | +--- Joystick A, X Axis
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** Joystick B, Button 1 -------+ | | | | +------- Joystick A, Y Axis
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** Joystick A, Button 2 -----------+ | | +----------- Joystick B, X Axis
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** Joystick A, Button 1 ---------------+ +--------------- Joystick B, Y Axis
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**/
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Bit8u ret=0xff;
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if (stick[0].enabled) {
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if (stick[0].xcount) stick[0].xcount--; else ret&=~1;
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if (stick[0].ycount) stick[0].ycount--; else ret&=~2;
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if (stick[0].button[0]) ret&=~16;
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if (stick[0].button[1]) ret&=~32;
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}
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if (stick[1].enabled) {
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if (stick[1].xcount) stick[1].xcount--; else ret&=~4;
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if (stick[1].ycount) stick[1].ycount--; else ret&=~8;
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if (stick[1].button[0]) ret&=~64;
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if (stick[1].button[1]) ret&=~128;
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}
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return ret;
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}
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static Bitu read_p201_timed(Bitu port,Bitu iolen) {
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Bit8u ret=0xff;
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double currentTick = PIC_FullIndex();
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if( stick[0].enabled ){
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if( stick[0].xtick < currentTick ) ret &=~1;
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if( stick[0].ytick < currentTick ) ret &=~2;
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}
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if( stick[1].enabled ){
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if( stick[1].xtick < currentTick ) ret &=~4;
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if( stick[1].ytick < currentTick ) ret &=~8;
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}
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if (stick[0].enabled) {
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if (stick[0].button[0]) ret&=~16;
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if (stick[0].button[1]) ret&=~32;
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}
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if (stick[1].enabled) {
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if (stick[1].button[0]) ret&=~64;
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if (stick[1].button[1]) ret&=~128;
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}
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return ret;
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}
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static void write_p201(Bitu port,Bitu val,Bitu iolen) {
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/* Store writetime index */
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write_active = true;
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last_write = PIC_Ticks;
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if (stick[0].enabled) {
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stick[0].xcount=(Bitu)((stick[0].xpos*RANGE)+RANGE);
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stick[0].ycount=(Bitu)((stick[0].ypos*RANGE)+RANGE);
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}
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if (stick[1].enabled) {
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stick[1].xcount=(Bitu)(((swap34? stick[1].ypos : stick[1].xpos)*RANGE)+RANGE);
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stick[1].ycount=(Bitu)(((swap34? stick[1].xpos : stick[1].ypos)*RANGE)+RANGE);
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}
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}
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static void write_p201_timed(Bitu port,Bitu val,Bitu iolen) {
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// Store writetime index
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// Axes take time = 24.2 microseconds + ( 0.011 microsecons/ohm * resistance )
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// to reset to 0
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// Precalculate the time at which each axis hits 0 here
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double currentTick = PIC_FullIndex();
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if (stick[0].enabled) {
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stick[0].xtick = currentTick + 1000.0*( JOY_S_CONSTANT + S_PER_OHM *
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(double)(((stick[0].xpos+1.0)* OHMS)) );
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stick[0].ytick = currentTick + 1000.0*( JOY_S_CONSTANT + S_PER_OHM *
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(double)(((stick[0].ypos+1.0)* OHMS)) );
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}
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if (stick[1].enabled) {
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stick[1].xtick = currentTick + 1000.0*( JOY_S_CONSTANT + S_PER_OHM *
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(double)((swap34? stick[1].ypos : stick[1].xpos)+1.0) * OHMS);
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stick[1].ytick = currentTick + 1000.0*( JOY_S_CONSTANT + S_PER_OHM *
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(double)((swap34? stick[1].xpos : stick[1].ypos)+1.0) * OHMS);
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}
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}
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void JOYSTICK_Enable(Bitu which,bool enabled) {
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if (which<2) stick[which].enabled=enabled;
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}
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void JOYSTICK_Button(Bitu which,Bitu num,bool pressed) {
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if ((which<2) && (num<2)) stick[which].button[num]=pressed;
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}
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void JOYSTICK_Move_X(Bitu which,float x) {
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if (which<2) {
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stick[which].xpos=x;
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}
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}
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void JOYSTICK_Move_Y(Bitu which,float y) {
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if (which<2) {
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stick[which].ypos=y;
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}
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}
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bool JOYSTICK_IsEnabled(Bitu which) {
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if (which<2) return stick[which].enabled;
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return false;
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}
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bool JOYSTICK_GetButton(Bitu which, Bitu num) {
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if ((which<2) && (num<2)) return stick[which].button[num];
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return false;
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}
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float JOYSTICK_GetMove_X(Bitu which) {
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if (which<2) return stick[which].xpos;
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return 0.0f;
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}
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float JOYSTICK_GetMove_Y(Bitu which) {
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if (which<2) return stick[which].ypos;
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return 0.0f;
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}
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class JOYSTICK:public Module_base{
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private:
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IO_ReadHandleObject ReadHandler;
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IO_WriteHandleObject WriteHandler;
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public:
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JOYSTICK(Section* configuration):Module_base(configuration){
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Section_prop * section=static_cast<Section_prop *>(configuration);
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const char * type=section->Get_string("joysticktype");
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if (!strcasecmp(type,"none")) joytype = JOY_NONE;
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else if (!strcasecmp(type,"false")) joytype = JOY_NONE;
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else if (!strcasecmp(type,"auto")) joytype = JOY_AUTO;
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else if (!strcasecmp(type,"2axis")) joytype = JOY_2AXIS;
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else if (!strcasecmp(type,"4axis")) joytype = JOY_4AXIS;
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else if (!strcasecmp(type,"4axis_2")) joytype = JOY_4AXIS_2;
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else if (!strcasecmp(type,"fcs")) joytype = JOY_FCS;
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else if (!strcasecmp(type,"ch")) joytype = JOY_CH;
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else joytype = JOY_AUTO;
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bool timed = section->Get_bool("timed");
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if(timed) {
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ReadHandler.Install(0x201,read_p201_timed,IO_MB);
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WriteHandler.Install(0x201,write_p201_timed,IO_MB);
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} else {
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ReadHandler.Install(0x201,read_p201,IO_MB);
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WriteHandler.Install(0x201,write_p201,IO_MB);
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}
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autofire = section->Get_bool("autofire");
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swap34 = section->Get_bool("swap34");
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button_wrapping_enabled = section->Get_bool("buttonwrap");
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stick[0].enabled = false;
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stick[1].enabled = false;
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stick[0].xtick = stick[0].ytick = stick[1].xtick =
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stick[1].ytick = PIC_FullIndex();
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}
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};
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static JOYSTICK* test;
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void JOYSTICK_Destroy(Section* sec) {
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delete test;
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}
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void JOYSTICK_Init(Section* sec) {
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test = new JOYSTICK(sec);
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sec->AddDestroyFunction(&JOYSTICK_Destroy,true);
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}
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