/* DaemonBite PC Engine / TurboGrafx-16 controllers to USB Adapter * Author: Mikael Norrgård * * Copyright (c) 2020 Mikael Norrgård * * GNU GENERAL PUBLIC LICENSE * Version 3, 29 June 2007 * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * */ #include "Gamepad.h" #define GAMEPAD_COUNT 2 // Set to 1 or 2 depending if you want to make a 1 or 2 port adapter #define SELECT_PAUSE 20 // How many microseconds to wait after setting select/enable lines? #define FRAME_TIME 16667 // The time of one "frame" in µs (used for turbo functionality) #define UP 0x01 #define DOWN 0x04 #define LEFT 0x08 #define RIGHT 0x02 #define UP_SH 0 #define DOWN_SH 2 #define LEFT_SH 3 #define RIGHT_SH 1 // ATT: 20 chars max (including NULL at the end) according to Arduino source code. // Additionally serial number is used to differentiate arduino projects to have different button maps! const char *gp_serial = "PC Engine to USB"; /* ------------------------------------------------------------------------- PC Engine / TurboGrafx-16 controller wiring PC Engine (P1) Arduino Pro Micro -------------------------------------- 1 VCC VCC 2 UP/I 3 PD0 3 RIGHT/II 2 PD1 4 DOWN/SELECT RXI PD2 5 LEFT/START TXO PD3 6 DSELECT 15 PB1 (Shared with P2) 7 ENABLE 14 PB3 (Shared with P2) 8 GND GND PC Engine (P2) Arduino Pro Micro -------------------------------------- 1 VCC VCC 2 UP/I A3 PF4 3 RIGHT/II A2 PF5 4 DOWN/SELECT A1 PF6 5 LEFT/START A0 PF7 6 DSELECT 15 PB1 (Shared with P1) 7 ENABLE 14 PB3 (Shared with P1) 8 GND GND ------------------------------------------------------------------------- */ // Set up USB HID gamepads Gamepad_ Gamepad[GAMEPAD_COUNT]; // Controllers uint8_t buttons[2][2] = {{0,0},{0,0}}; uint8_t buttonsPrev[2][2] = {{0,0},{0,0}}; uint8_t gp = 0; // Turbo timing uint32_t microsNow = 0; uint32_t microsEnable = 0; void setup() { // Set D0-D3 as inputs and enable pull-up resistors (port1 data pins) DDRD &= ~B00001111; PORTD |= B00001111; // Set F4-F7 as inputs and enable pull-up resistors (port2 data pins) DDRF &= ~B11110000; PORTF |= B11110000; // Set B1 and B3 as outputs and set them LOW PORTB &= ~B00001010; DDRB |= B00001010; // Wait for the controller(s) to settle delay(100); } void loop() { while(1) { // Handle clock for turbo functionality microsNow = micros(); if((microsNow-microsEnable) >= FRAME_TIME) { PORTB |= B00001000; // Set enable pin HIGH to increase clock for turbo delayMicroseconds(SELECT_PAUSE); // Wait a while... PORTB &= ~B00001000; // Set enable pin LOW again microsEnable = microsNow; } // Clear button data buttons[0][0]=0; buttons[0][1]=0; buttons[1][0]=0; buttons[1][1]=0; // Read all button and axes states PORTB |= B00000010; // Set SELECT pin HIGH delayMicroseconds(SELECT_PAUSE); // Wait a while... buttons[0][0] = PIND & B00001111; // Read DPAD for controller 1 if(GAMEPAD_COUNT==2) buttons[1][0] = (PINF & B11110000) >> 4; // Read DPAD for controller 2 PORTB &= ~B00000010; // Set SELECT pin LOW delayMicroseconds(SELECT_PAUSE); // Wait a while... buttons[0][1] = PIND & B00001111; // Read buttons for controller 1 if(GAMEPAD_COUNT==2) buttons[1][1] = (PINF & B11110000) >> 4; // Read buttons for controller 2 // Invert the readings so a 1 means a pressed button buttons[0][0] = ~buttons[0][0]; buttons[0][1] = ~buttons[0][1]; buttons[1][0] = ~buttons[1][0]; buttons[1][1] = ~buttons[1][1]; // Send data to USB if values have changed for(gp=0; gp> DOWN_SH) - ((buttons[gp][0] & UP) >> UP_SH); Gamepad[gp]._GamepadReport.X = ((buttons[gp][0] & RIGHT) >> RIGHT_SH) - ((buttons[gp][0] & LEFT) >> LEFT_SH); buttonsPrev[gp][0] = buttons[gp][0]; buttonsPrev[gp][1] = buttons[gp][1]; Gamepad[gp].send(); } } }}