177 lines
4.6 KiB
C++
177 lines
4.6 KiB
C++
/******************************************************************************/
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/* Mednafen Sega Saturn Emulation Module */
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/******************************************************************************/
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/* 3dpad.cpp:
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** Copyright (C) 2016-2017 Mednafen Team
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**
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** This program is free software; you can redistribute it and/or
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** modify it under the terms of the GNU General Public License
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** as published by the Free Software Foundation; either version 2
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** of the License, or (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 Foundation, Inc.,
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** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "common.h"
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#include "3dpad.h"
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namespace MDFN_IEN_SS
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{
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IODevice_3DPad::IODevice_3DPad() : dbuttons(0), mode(false)
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{
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}
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IODevice_3DPad::~IODevice_3DPad()
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{
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}
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void IODevice_3DPad::Power(void)
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{
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phase = -1;
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tl = true;
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data_out = 0x01;
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}
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void IODevice_3DPad::UpdateInput(const uint8* data, const int32 time_elapsed)
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{
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const uint16 dtmp = MDFN_de16lsb(&data[0]);
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dbuttons = (dbuttons & 0x8800) | (dtmp & 0x0FFF);
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mode = (bool)(dtmp & 0x1000);
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for(unsigned axis = 0; axis < 2; axis++)
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{
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int32 tmp = 32767 + MDFN_de16lsb(&data[0x2 + (axis << 2) + 2]) - MDFN_de16lsb(&data[0x2 + (axis << 2) + 0]);
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if(tmp >= (32767 - 128) && tmp < 32767)
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tmp = 32767;
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tmp = (tmp * 255 + 32767) / 65534;
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thumb[axis] = tmp;
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}
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for(unsigned w = 0; w < 2; w++)
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{
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shoulder[w] = (MDFN_de16lsb(&data[0xA + (w << 1)]) * 255 + 16383) / 32767;
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// May not be right for digital mode, but shouldn't matter too much:
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if(shoulder[w] <= 0x55)
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dbuttons &= ~(0x0800 << (w << 2));
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else if(shoulder[w] >= 0x8E)
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dbuttons |= 0x0800 << (w << 2);
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}
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}
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uint8 IODevice_3DPad::UpdateBus(const uint8 smpc_out, const uint8 smpc_out_asserted)
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{
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uint8 tmp;
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if(smpc_out & 0x40)
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{
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phase = -1;
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tl = true;
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data_out = 0x01;
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}
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else
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{
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if((bool)(smpc_out & 0x20) != tl)
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{
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if(phase < 15)
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{
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tl = !tl;
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phase++;
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}
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if(!phase)
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{
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if(mode)
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{
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buffer[ 0] = 0x1;
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buffer[ 1] = 0x6;
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buffer[ 2] = (((dbuttons >> 0) & 0xF) ^ 0xF);
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buffer[ 3] = (((dbuttons >> 4) & 0xF) ^ 0xF);
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buffer[ 4] = (((dbuttons >> 8) & 0xF) ^ 0xF);
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buffer[ 5] = (((dbuttons >> 12) & 0xF) ^ 0xF);
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buffer[ 6] = (thumb[0] >> 4) & 0xF;
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buffer[ 7] = (thumb[0] >> 0) & 0xF;
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buffer[ 8] = (thumb[1] >> 4) & 0xF;
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buffer[ 9] = (thumb[1] >> 0) & 0xF;
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buffer[10] = (shoulder[0] >> 4) & 0xF;
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buffer[11] = (shoulder[0] >> 0) & 0xF;
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buffer[12] = (shoulder[1] >> 4) & 0xF;
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buffer[13] = (shoulder[1] >> 0) & 0xF;
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buffer[14] = 0x0;
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buffer[15] = 0x1;
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}
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else
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{
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phase = 8;
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buffer[ 8] = 0x0;
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buffer[ 9] = 0x2;
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buffer[10] = (((dbuttons >> 0) & 0xF) ^ 0xF);
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buffer[11] = (((dbuttons >> 4) & 0xF) ^ 0xF);
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buffer[12] = (((dbuttons >> 8) & 0xF) ^ 0xF);
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buffer[13] = (((dbuttons >> 12) & 0xF) ^ 0xF);
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buffer[14] = 0x0;
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buffer[15] = 0x1;
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}
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}
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data_out = buffer[phase];
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}
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}
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tmp = (tl << 4) | data_out;
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return (smpc_out & (smpc_out_asserted | 0xE0)) | (tmp &~ smpc_out_asserted);
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}
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static const char* const ModeSwitchPositions[] =
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{
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gettext_noop("Digital(+)"),
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gettext_noop("Analog(○)"),
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};
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IDIISG IODevice_3DPad_IDII =
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{
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{ "up", "D-Pad UP ↑", 0, IDIT_BUTTON, "down" },
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{ "down", "D-Pad DOWN ↓", 1, IDIT_BUTTON, "up" },
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{ "left", "D-Pad LEFT ←", 2, IDIT_BUTTON, "right" },
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{ "right", "D-Pad RIGHT →", 3, IDIT_BUTTON, "left" },
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{ "b", "B", 6, IDIT_BUTTON },
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{ "c", "C", 7, IDIT_BUTTON },
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{ "a", "A", 5, IDIT_BUTTON },
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{ "start", "START", 4, IDIT_BUTTON },
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{ "z", "Z", 10, IDIT_BUTTON },
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{ "y", "Y", 9, IDIT_BUTTON },
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{ "x", "X", 8, IDIT_BUTTON },
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{ NULL, "empty", 0, IDIT_BUTTON },
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IDIIS_Switch("mode", "Mode", 17, ModeSwitchPositions, sizeof(ModeSwitchPositions) / sizeof(ModeSwitchPositions[0])),
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{ "analog_left", "Analog LEFT ←", 15, IDIT_BUTTON_ANALOG },
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{ "analog_right", "Analog RIGHT →", 16, IDIT_BUTTON_ANALOG },
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{ "analog_up", "Analog UP ↑", 13, IDIT_BUTTON_ANALOG },
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{ "analog_down", "Analog DOWN ↓", 14, IDIT_BUTTON_ANALOG },
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{ "rs", "Right Shoulder (Analog)", 12, IDIT_BUTTON_ANALOG },
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{ "ls", "Left Shoulder (Analog)", 11, IDIT_BUTTON_ANALOG },
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};
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}
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