1
0
mirror of https://github.com/MickGyver/DaemonBite-Retro-Controllers-USB synced 2024-12-25 09:18:48 -05:00
DaemonBite-Retro-Controller.../SegaTwoControllersUSB/SegaControllers32U4.cpp

239 lines
10 KiB
C++

//
// SegaControllers32U4.cpp
//
// Authors:
// Jon Thysell <thysell@gmail.com>
// Mikael Norrgård <mick@daemonbite.com>
//
// (Based on the code by Jon Thysell, but the interfacing is almost completely
// rewritten by Mikael Norrgård)
//
// 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.
#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,PD7)
DDRD &= ~B10011111; // input
PORTD |= B10011111; // high to enable internal pull-up
DDRC |= B01000000; // Select pins as output
DDRE |= B01000000;
PORTC |= B01000000; // Select pins high
PORTE |= B01000000;
_pinSelect = true;
for(byte i=0; i<=1; i++)
{
currentState[i] = 0;
_connected[i] = 0;
_sixButtonMode[i] = false;
_ignoreCycles[i] = 0;
}
}
void SegaControllers32U4::readState()
{
// Set the select pins low/high
_pinSelect = !_pinSelect;
if(!_pinSelect) {
PORTE &= ~B01000000;
PORTC &= ~B01000000;
} else {
PORTE |= B01000000;
PORTC |= B01000000;
}
// Short delay to stabilise outputs in controller
delayMicroseconds(SC_CYCLE_DELAY);
// Read all input registers
_inputReg1 = PINF;
_inputReg2 = PINB;
_inputReg3 = PIND;
readPort1();
readPort2();
}
// "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 --- --- --- --- --- Home (Home only for 8bitdo wireless gamepads)
// 7 HI --- --- --- --- --- ---
void SegaControllers32U4::readPort1()
{
if(_ignoreCycles[0] <= 0)
{
if(_pinSelect) // Select pin is HIGH
{
if(_connected[0])
{
// Check if six button mode is active
if(_sixButtonMode[0])
{
// Read input pins for X, Y, Z, Mode
(bitRead(_inputReg1, DB9_PIN1_BIT1) == LOW) ? currentState[0] |= SC_BTN_Z : currentState[0] &= ~SC_BTN_Z;
(bitRead(_inputReg1, DB9_PIN2_BIT1) == LOW) ? currentState[0] |= SC_BTN_Y : currentState[0] &= ~SC_BTN_Y;
(bitRead(_inputReg1, DB9_PIN3_BIT1) == LOW) ? currentState[0] |= SC_BTN_X : currentState[0] &= ~SC_BTN_X;
(bitRead(_inputReg1, DB9_PIN4_BIT1) == LOW) ? currentState[0] |= SC_BTN_MODE : currentState[0] &= ~SC_BTN_MODE;
_sixButtonMode[0] = false;
_ignoreCycles[0] = 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(_inputReg1, DB9_PIN1_BIT1) == LOW) ? currentState[0] |= SC_BTN_UP : currentState[0] &= ~SC_BTN_UP;
(bitRead(_inputReg1, DB9_PIN2_BIT1) == LOW) ? currentState[0] |= SC_BTN_DOWN : currentState[0] &= ~SC_BTN_DOWN;
(bitRead(_inputReg1, DB9_PIN3_BIT1) == LOW) ? currentState[0] |= SC_BTN_LEFT : currentState[0] &= ~SC_BTN_LEFT;
(bitRead(_inputReg1, DB9_PIN4_BIT1) == LOW) ? currentState[0] |= SC_BTN_RIGHT : currentState[0] &= ~SC_BTN_RIGHT;
(bitRead(_inputReg2, DB9_PIN6_BIT1) == LOW) ? currentState[0] |= SC_BTN_B : currentState[0] &= ~SC_BTN_B;
(bitRead(_inputReg2, DB9_PIN9_BIT1) == LOW) ? currentState[0] |= SC_BTN_C : currentState[0] &= ~SC_BTN_C;
}
}
else // No Mega Drive controller is connected, use SMS/Atari mode
{
// Clear current state
currentState[0] = 0;
// Read input pins for Up, Down, Left, Right, Fire1, Fire2
if (bitRead(_inputReg1, DB9_PIN1_BIT1) == LOW) { currentState[0] |= SC_BTN_UP; }
if (bitRead(_inputReg1, DB9_PIN2_BIT1) == LOW) { currentState[0] |= SC_BTN_DOWN; }
if (bitRead(_inputReg1, DB9_PIN3_BIT1) == LOW) { currentState[0] |= SC_BTN_LEFT; }
if (bitRead(_inputReg1, DB9_PIN4_BIT1) == LOW) { currentState[0] |= SC_BTN_RIGHT; }
if (bitRead(_inputReg2, DB9_PIN6_BIT1) == LOW) { currentState[0] |= SC_BTN_A; }
if (bitRead(_inputReg2, DB9_PIN9_BIT1) == LOW) { currentState[0] |= SC_BTN_B; }
}
}
else // Select pin is LOW
{
// Check if a controller is connected
_connected[0] = (bitRead(_inputReg1, DB9_PIN3_BIT1) == LOW && bitRead(_inputReg1, DB9_PIN4_BIT1) == LOW);
// Check for six button mode
_sixButtonMode[0] = (bitRead(_inputReg1, DB9_PIN1_BIT1) == LOW && bitRead(_inputReg1, DB9_PIN2_BIT1) == LOW);
// Read input pins for A and Start
if(_connected[0])
{
if(!_sixButtonMode[0])
{
(bitRead(_inputReg2, DB9_PIN6_BIT1) == LOW) ? currentState[0] |= SC_BTN_A : currentState[0] &= ~SC_BTN_A;
(bitRead(_inputReg2, DB9_PIN9_BIT1) == LOW) ? currentState[0] |= SC_BTN_START : currentState[0] &= ~SC_BTN_START;
}
}
}
}
else
{
if(_ignoreCycles[0]-- == 2) // Decrease the ignore cycles counter and read 8bitdo home in first "ignored" cycle, this cycle is unused on normal 6-button controllers
{
(bitRead(_inputReg1, DB9_PIN1_BIT1) == LOW) ? currentState[0] |= SC_BTN_HOME : currentState[0] &= ~SC_BTN_HOME;
}
}
}
void SegaControllers32U4::readPort2()
{
if(_ignoreCycles[1] <= 0)
{
if(_pinSelect) // Select pin is HIGH
{
if(_connected[1])
{
// Check if six button mode is active
if(_sixButtonMode[1])
{
// Read input pins for X, Y, Z, Mode
(bitRead(_inputReg3, DB9_PIN1_BIT2) == LOW) ? currentState[1] |= SC_BTN_Z : currentState[1] &= ~SC_BTN_Z;
(bitRead(_inputReg3, DB9_PIN2_BIT2) == LOW) ? currentState[1] |= SC_BTN_Y : currentState[1] &= ~SC_BTN_Y;
(bitRead(_inputReg3, DB9_PIN3_BIT2) == LOW) ? currentState[1] |= SC_BTN_X : currentState[1] &= ~SC_BTN_X;
(bitRead(_inputReg3, DB9_PIN4_BIT2) == LOW) ? currentState[1] |= SC_BTN_MODE : currentState[1] &= ~SC_BTN_MODE;
_sixButtonMode[1] = false;
_ignoreCycles[1] = 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(_inputReg3, DB9_PIN1_BIT2) == LOW) ? currentState[1] |= SC_BTN_UP : currentState[1] &= ~SC_BTN_UP;
(bitRead(_inputReg3, DB9_PIN2_BIT2) == LOW) ? currentState[1] |= SC_BTN_DOWN : currentState[1] &= ~SC_BTN_DOWN;
(bitRead(_inputReg3, DB9_PIN3_BIT2) == LOW) ? currentState[1] |= SC_BTN_LEFT : currentState[1] &= ~SC_BTN_LEFT;
(bitRead(_inputReg3, DB9_PIN4_BIT2) == LOW) ? currentState[1] |= SC_BTN_RIGHT : currentState[1] &= ~SC_BTN_RIGHT;
(bitRead(_inputReg3, DB9_PIN6_BIT2) == LOW) ? currentState[1] |= SC_BTN_B : currentState[1] &= ~SC_BTN_B;
(bitRead(_inputReg3, DB9_PIN9_BIT2) == LOW) ? currentState[1] |= SC_BTN_C : currentState[1] &= ~SC_BTN_C;
}
}
else // No Mega Drive controller is connected, use SMS/Atari mode
{
// Clear current state
currentState[1] = 0;
// Read input pins for Up, Down, Left, Right, Fire1, Fire2
if (bitRead(_inputReg3, DB9_PIN1_BIT2) == LOW) { currentState[1] |= SC_BTN_UP; }
if (bitRead(_inputReg3, DB9_PIN2_BIT2) == LOW) { currentState[1] |= SC_BTN_DOWN; }
if (bitRead(_inputReg3, DB9_PIN3_BIT2) == LOW) { currentState[1] |= SC_BTN_LEFT; }
if (bitRead(_inputReg3, DB9_PIN4_BIT2) == LOW) { currentState[1] |= SC_BTN_RIGHT; }
if (bitRead(_inputReg3, DB9_PIN6_BIT2) == LOW) { currentState[1] |= SC_BTN_A; }
if (bitRead(_inputReg3, DB9_PIN9_BIT2) == LOW) { currentState[1] |= SC_BTN_B; }
}
}
else // Select pin is LOW
{
// Check if a controller is connected
_connected[1] = (bitRead(_inputReg3, DB9_PIN3_BIT2) == LOW && bitRead(_inputReg3, DB9_PIN4_BIT2) == LOW);
// Check for six button mode
_sixButtonMode[1] = (bitRead(_inputReg3, DB9_PIN1_BIT2) == LOW && bitRead(_inputReg3, DB9_PIN2_BIT2) == LOW);
// Read input pins for A and Start
if(_connected[1])
{
if(!_sixButtonMode[1])
{
(bitRead(_inputReg3, DB9_PIN6_BIT2) == LOW) ? currentState[1] |= SC_BTN_A : currentState[1] &= ~SC_BTN_A;
(bitRead(_inputReg3, DB9_PIN9_BIT2) == LOW) ? currentState[1] |= SC_BTN_START : currentState[1] &= ~SC_BTN_START;
}
}
}
}
else
{
if(_ignoreCycles[1]-- == 2) // Decrease the ignore cycles counter and read 8bitdo home in first "ignored" cycle, this cycle is unused on normal 6-button controllers
{
(bitRead(_inputReg3, DB9_PIN1_BIT2) == LOW) ? currentState[1] |= SC_BTN_HOME : currentState[1] &= ~SC_BTN_HOME;
}
}
}