// // SegaControllers32U4.cpp // // Authors: // Jon Thysell // Mikael Norrgård // // (Based on the code by Jon Thysell, but the interfacing is almost completely // rewritten by Mikael Norrgård) // // Copyright (c) 2017 Jon Thysell // // 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. #include "Arduino.h" #include "SegaControllers32U4.h" SegaControllers32U4::SegaControllers32U4(void) { // Setup input pins (A0,A1,A2,A3,14,15 or PF7,PF6,PF5,PF4,PB3,PB1) DDRF &= ~B11110000; // input PORTF |= B11110000; // high to enable internal pull-up DDRB &= ~B00001010; // input PORTB |= B00001010; // high to enable internal pull-up // Setup input pins (TXO,RXI,2,3,4,6 or PD3,PD2,PD1,PD0,PD4,PE6) DDRD &= ~B10011111; // input PORTD |= B10011111; // high to enable internal pull-up for(byte i=0; i<=1; i++) { *_ddrSelect[i] |= _maskSelect[i]; // Select pins as output *_portSelect[i] |= _maskSelect[i]; // Select pins high _inputReg[i] = 0; _currentState[i] = 0; _connected[i] = 0; _sixButtonMode[i] = false; _ignoreCycles[i] = 0; _pinSelect[i] = true; } } word SegaControllers32U4::getStateMD(byte gp) { // "Normal" Six button controller reading routine, done a bit differently in this project // Cycle TH out TR in TL in D3 in D2 in D1 in D0 in // 0 LO Start A 0 0 Down Up // 1 HI C B Right Left Down Up // 2 LO Start A 0 0 Down Up (Check connected and read Start and A in this cycle) // 3 HI C B Right Left Down Up (Read B, C and directions in this cycle) // 4 LO Start A 0 0 0 0 (Check for six button controller in this cycle) // 5 HI C B Mode X Y Z (Read X,Y,Z and Mode in this cycle) // 6 LO --- --- --- --- --- --- // 7 HI --- --- --- --- --- --- // Set the select pin low/high _pinSelect[gp] = !_pinSelect[gp]; (!_pinSelect[gp]) ? *_portSelect[gp] &= ~_maskSelect[gp] : *_portSelect[gp] |= _maskSelect[gp]; // Set LOW on even cycle, HIGH on uneven cycle // Short delay to stabilise outputs in controller delayMicroseconds(SC_CYCLE_DELAY); // Read input register(s) _inputReg[0] = *_pinInputs[gp][0]; _inputReg[1] = *_pinInputs[gp][1]; if(_ignoreCycles[gp] <= 0) { if(_pinSelect[gp]) // Select pin is HIGH { if(_connected[gp]) { // Check if six button mode is active if(_sixButtonMode[gp]) { // Read input pins for X, Y, Z, Mode (bitRead(*_pinInputs[gp][SC_PIN1_BIT], _bitInputs[gp][SC_PIN1_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_Z : _currentState[gp] &= ~SC_BTN_Z; (bitRead(*_pinInputs[gp][SC_PIN2_BIT], _bitInputs[gp][SC_PIN2_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_Y : _currentState[gp] &= ~SC_BTN_Y; (bitRead(*_pinInputs[gp][SC_PIN3_BIT], _bitInputs[gp][SC_PIN3_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_X : _currentState[gp] &= ~SC_BTN_X; (bitRead(*_pinInputs[gp][SC_PIN4_BIT], _bitInputs[gp][SC_PIN4_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_MODE : _currentState[gp] &= ~SC_BTN_MODE; _sixButtonMode[gp] = false; _ignoreCycles[gp] = 2; // Ignore the two next cycles (cycles 6 and 7 in table above) } else { // Read input pins for Up, Down, Left, Right, B, C (bitRead(*_pinInputs[gp][SC_PIN1_BIT], _bitInputs[gp][SC_PIN1_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_UP : _currentState[gp] &= ~SC_BTN_UP; (bitRead(*_pinInputs[gp][SC_PIN2_BIT], _bitInputs[gp][SC_PIN2_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_DOWN : _currentState[gp] &= ~SC_BTN_DOWN; (bitRead(*_pinInputs[gp][SC_PIN3_BIT], _bitInputs[gp][SC_PIN3_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_LEFT : _currentState[gp] &= ~SC_BTN_LEFT; (bitRead(*_pinInputs[gp][SC_PIN4_BIT], _bitInputs[gp][SC_PIN4_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_RIGHT : _currentState[gp] &= ~SC_BTN_RIGHT; (bitRead(*_pinInputs[gp][SC_PIN6_BIT], _bitInputs[gp][SC_PIN6_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_B : _currentState[gp] &= ~SC_BTN_B; (bitRead(*_pinInputs[gp][SC_PIN9_BIT], _bitInputs[gp][SC_PIN9_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_C : _currentState[gp] &= ~SC_BTN_C; } } else // No Mega Drive controller is connected, use SMS/Atari mode { // Clear current state _currentState[gp] = 0; // Read input pins for Up, Down, Left, Right, Fire1, Fire2 if (bitRead(*_pinInputs[gp][SC_PIN1_BIT], _bitInputs[gp][SC_PIN1_BIT]) == LOW) { _currentState[gp] |= SC_BTN_UP; } if (bitRead(*_pinInputs[gp][SC_PIN2_BIT], _bitInputs[gp][SC_PIN2_BIT]) == LOW) { _currentState[gp] |= SC_BTN_DOWN; } if (bitRead(*_pinInputs[gp][SC_PIN3_BIT], _bitInputs[gp][SC_PIN3_BIT]) == LOW) { _currentState[gp] |= SC_BTN_LEFT; } if (bitRead(*_pinInputs[gp][SC_PIN4_BIT], _bitInputs[gp][SC_PIN4_BIT]) == LOW) { _currentState[gp] |= SC_BTN_RIGHT; } if (bitRead(*_pinInputs[gp][SC_PIN6_BIT], _bitInputs[gp][SC_PIN6_BIT]) == LOW) { _currentState[gp] |= SC_BTN_A; } if (bitRead(*_pinInputs[gp][SC_PIN9_BIT], _bitInputs[gp][SC_PIN9_BIT]) == LOW) { _currentState[gp] |= SC_BTN_B; } } } else // Select pin is LOW { // Check if a controller is connected _connected[gp] = (bitRead(*_pinInputs[gp][SC_PIN3_BIT], _bitInputs[gp][SC_PIN3_BIT]) == LOW && bitRead(*_pinInputs[gp][SC_PIN4_BIT], _bitInputs[gp][SC_PIN4_BIT]) == LOW); // Check for six button mode _sixButtonMode[gp] = (bitRead(*_pinInputs[gp][SC_PIN1_BIT], _bitInputs[gp][SC_PIN1_BIT]) == LOW && bitRead(*_pinInputs[gp][SC_PIN2_BIT], _bitInputs[gp][SC_PIN2_BIT]) == LOW); // Read input pins for A and Start if(_connected[gp]) { if(!_sixButtonMode[gp]) { (bitRead(*_pinInputs[gp][SC_PIN6_BIT], _bitInputs[gp][SC_PIN6_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_A : _currentState[gp] &= ~SC_BTN_A; (bitRead(*_pinInputs[gp][SC_PIN9_BIT], _bitInputs[gp][SC_PIN9_BIT]) == LOW) ? _currentState[gp] |= SC_BTN_START : _currentState[gp] &= ~SC_BTN_START; } } } } else { _ignoreCycles[gp]--; } return _currentState[gp]; }