source/src/vm/fmtowns/joypad.cpp

   1 /*
   2         FUJITSU FM Towns Emulator 'eFMTowns'
   3
   4         Author : Kyuma.Ohta <whatisthis.sowhat _at_ gmail.com>
   5         Date   : 2020.00.26 -
   6     History : 2020.09.26 Separate from joystick.cpp/joystick.h .
   7         [ Towns PAD ]
   8
   9 */
  10
  11 #include "./joystick.h"
  12 #include "./joypad.h"
  13
  14 namespace FMTOWNS {
  15 void JOYPAD::initialize()
  16 {
  17         DEVICE::initialize();
  18         _TCHAR tmps[128] = {0};
  19         my_stprintf_s(tmps, sizeof(tmps), _T("FM-Towns JOY PAD #%d"), pad_num);
  20         set_device_name(_T("%s"), tmps);
  21 //      rawdata = emu->get_joy_buffer();
  22         register_frame_event(this);
  23         sel_line = false;
  24 }
  25
  26 void JOYPAD::reset()
  27 {
  28 //      sel_line = true;
  29 //      write_signals(&line_dat,   0);
  30         query_joystick();
  31         write_signals(&line_com,   (enabled) ? 0xffffffff : 0x00000000);
  32 }
  33
  34
  35 void JOYPAD::event_pre_frame(void)
  36 {
  37 }
  38
  39 void JOYPAD::event_frame(void)
  40 {
  41 }
  42
  43 void JOYPAD::query_joystick(void)
  44 {
  45         // enabled
  46         rawdata = emu->get_joy_buffer();
  47         uint32_t stat = 0;
  48         if((rawdata != NULL) && (enabled)) {
  49                 uint32_t d = rawdata[pad_num];
  50 //              out_debug_log(_T("DATA: %08X"), d);
  51                 if((type_6buttons) && (sel_line)) { // 6Buttons Multiplied
  52                         // If COM == 1 THEN CHECK BUTTONS
  53                         // 6Buttons PAD is seems to be this schematic:
  54                         // http://www.awa.or.jp/home/shimojo/towpadx.htm
  55                         // RIGHT <-> C  / LEFT <-> X / UP <-> Z / DOWN <->Y
  56                         uint8_t buttons = (rawdata[pad_num] >> 8) & 0x0f;
  57                         if((buttons & 0x01) != 0) stat |= LINE_JOYPORT_RIGHT;
  58                         if((buttons & 0x02) != 0) stat |= LINE_JOYPORT_LEFT;
  59                         if((buttons & 0x04) != 0) stat |= LINE_JOYPORT_DOWN;
  60                         if((buttons & 0x08) != 0) stat |= LINE_JOYPORT_UP;
  61                 } else {
  62                         // If ((COM != 0) OR (PAD IS 2BUTTONS))  THEN CHECK AXIS
  63                         uint8_t axis = rawdata[pad_num] & 0x0f;
  64                         if((axis & 0x01) != 0) stat |= LINE_JOYPORT_UP;
  65                         if((axis & 0x02) != 0) stat |= LINE_JOYPORT_DOWN;
  66                         if((axis & 0x04) != 0) stat |= LINE_JOYPORT_LEFT;
  67                         if((axis & 0x08) != 0) stat |= LINE_JOYPORT_RIGHT;
  68                 }
  69                 if((rawdata[pad_num] & 0x10) != 0) stat |= LINE_JOYPORT_A;
  70                 if((rawdata[pad_num] & 0x20) != 0) stat |= LINE_JOYPORT_B;
  71                 // SEL = UP + DOWN, RUN = LEFT + RIGHT
  72                 if((rawdata[pad_num] & 0x40) != 0) stat |= (LINE_JOYPORT_LEFT | LINE_JOYPORT_RIGHT);
  73                 if((rawdata[pad_num] & 0x80) != 0) stat |= (LINE_JOYPORT_UP | LINE_JOYPORT_DOWN);
  74         } else {
  75                 // None Connected
  76                 stat = 0x00;
  77         }
  78         write_signals(&line_dat, stat);
  79 }
  80
  81 void JOYPAD::write_signal(int id, uint32_t data, uint32_t mask)
  82 {
  83         uint32_t ndata = data & mask;
  84
  85         switch(id) {
  86         case SIG_JOYPAD_QUERY:
  87                 if(ndata == (1 << pad_num)) {
  88                         if(enabled) query_joystick();
  89                 }
  90                 break;
  91         case SIG_JOYPAD_ENABLE:
  92                 if((ndata & (1 << SIG_JOYPORT_TYPE_2BUTTONS)) != 0) {
  93                         //out_debug_log(_T("SELECT 2BUTTONS PAD"));
  94                         enabled = true;
  95                         type_6buttons = false;
  96                         reset();
  97                 } else if((ndata & (1 << SIG_JOYPORT_TYPE_6BUTTONS)) != 0) {
  98                         //out_debug_log(_T("SELECT 6BUTTONS PAD"));
  99                         enabled = true;
 100                         type_6buttons = true;
 101                         reset();
 102                 } else {
 103                         out_debug_log(_T("DISCONNECTED"));
 104                         enabled = false;
 105                         type_6buttons = false;
 106                         sel_line = false;
 107                         reset();
 108                 }
 109                 break;
 110         case SIG_JOYPAD_SELECT_BUS:
 111 //              out_debug_log(_T("SIG_JOYPAD_SELECT_BUS, VALUE=%08X"), ndata);
 112                 if(enabled) {
 113                         if(ndata != 0) {
 114                                 sel_line = true;
 115                         } else {
 116                                 sel_line = false;
 117                         }
 118                         write_signals(&line_com, (sel_line) ? 0xffffffff : 0x00000000);
 119                 }
 120                 break;
 121         }
 122 }
 123
 124
 125 void JOYPAD::update_config()
 126 {
 127 }
 128
 129
 130 #define STATE_VERSION 3
 131
 132 bool JOYPAD::process_state(FILEIO *state_fio, bool loading)
 133 {
 134         if(!state_fio->StateCheckUint32(STATE_VERSION)) {
 135                 return false;
 136         }
 137         if(!state_fio->StateCheckInt32(this_device_id)) {
 138                 return false;
 139         }
 140         state_fio->StateValue(sel_line);
 141         state_fio->StateValue(type_6buttons);
 142         state_fio->StateValue(pad_num);
 143         state_fio->StateValue(enabled);
 144         return true;
 145 }
 146 }