DaemonBite-Retro-Controllers-USB/SegaTwoControllersUSB/SegaControllers32U4.h

//
// SegaControllers32U4.h
//
// Authors:
//       Jon Thysell <thysell@gmail.com>
//       Mikael Norrgård <mick@daemonbite.com>
//
// Copyright (c) 2017 Jon Thysell <http://jonthysell.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#ifndef SegaController32U4_h
#define SegaController32U4_h

enum
{
  SC_CTL_ON     = 1,   // The controller is connected (not used)
  SC_BTN_UP     = 2,
  SC_BTN_DOWN   = 4,
  SC_BTN_LEFT   = 8,
  SC_BTN_RIGHT  = 16,
  SC_BTN_A      = 32,
  SC_BTN_B      = 64,
  SC_BTN_C      = 128,
  SC_BTN_X      = 256,
  SC_BTN_Y      = 512,
  SC_BTN_Z      = 1024,
  SC_BTN_START  = 2048,
  SC_BTN_MODE   = 4096,
  SC_BIT_UP     = 1,
  SC_BIT_DOWN   = 2,
  SC_BIT_LEFT   = 3,
  SC_BIT_RIGHT  = 4,
  SC_PIN1_BIT   = 0,
  SC_PIN2_BIT   = 1,
  SC_PIN3_BIT   = 2,
  SC_PIN4_BIT   = 3,
  SC_PIN6_BIT   = 4,
  SC_PIN9_BIT   = 5,
  DB9_PIN1_BIT1 = 7,
  DB9_PIN2_BIT1 = 6,
  DB9_PIN3_BIT1 = 5,
  DB9_PIN4_BIT1 = 4,
  DB9_PIN6_BIT1 = 3,
  DB9_PIN9_BIT1 = 1,
  DB9_PIN1_BIT2 = 3,
  DB9_PIN2_BIT2 = 2,
  DB9_PIN3_BIT2 = 1,
  DB9_PIN4_BIT2 = 0,
  DB9_PIN6_BIT2 = 4,
  DB9_PIN9_BIT2 = 6
};

const byte SC_CYCLE_DELAY = 10; // Delay (µs) between setting the select pin and reading the button pins

class SegaControllers32U4 {
  public:
    SegaControllers32U4(void);

    word getStateMD(byte);

  private:
    word _currentState[2];

    byte volatile * const _ddrSelect[2] =  { &DDRE, &DDRC }; 
    byte volatile * const _portSelect[2] = { &PORTE, &PORTC }; 
    const byte _maskSelect[2] = {B01000000, B01000000}; 
    boolean _pinSelect[2];

    byte _ignoreCycles[2];

    boolean _connected[2];
    boolean _sixButtonMode[2];

    byte volatile * const _pinInputs[2][7] = { {&PINF,&PINF,&PINF,&PINF,&PINB,&PINB}, {&PIND,&PIND,&PIND,&PIND,&PIND,&PIND} }; 
    byte _bitInputs[2][7] = { {7,6,5,4,3,1}, {3,2,1,0,4,7} };
    byte _inputReg[2];
};

#endif