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Arduino-USB-HID-RetroJoysti.../test/RetroJoystickAdapter-SegaGenesis.ino

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2016-09-07 12:41:05 -04:00
//Sega Megadrive/Genesis 6-button controller adapter by Kurg 2.9.2016
//Tested with Arduino Pro Micro (ATmega32U4, 5V) from Ebay ($4)
//Selected board from Arduino IDE: Arduino Leonardo
//Joystick2 library from https://github.com/MHeironimus/ArduinoJoystickLibrary
//https://www.cs.cmu.edu/~chuck/infopg/segasix.txt
#include "Joystick2.h"
//DB9 pin (9-pin D-connector)
//Select low Select high 3rd pulse
//1=Up Up Z
//2=Down Down Y
//3=Ground Left X
//4=Ground Right
//5=+5V
//6=A B
//7=Control("Select")
//8=Ground
//9=Start C
#define EVENTS_TOTAL 4+6+1 //4 directions, 6 fire-buttons and Start
#define INPUT_PINS_TOTAL 6
//DB9 (port1): 1 2 3 4 6 9
const uint8_t inputPinsPort1[] = {10, 16, 14, 15, 3, A1};
#define VCC_PORT1 A0 //DB9 (port1) pin 5 //comment out if not connected to IO-pin
#define MODE_SELECT_PORT1 A3 //DB9 (port1) pin 7
//DB9 (port 2) pin 8 = GND
//DB9 (port2): 1 2 3 4 6 9
const uint8_t inputPinsPort2[] = { 5, 6, 7, 8, 4, A2};
#define VCC_PORT2 9 //DB9 (port 2) pin 5 //comment out if not connected to IO-pin
#define MODE_SELECT_PORT2 2 //DB9 (port2) pin 7
//DB9 (port 2) pin 8 = GND
uint8_t lastStatusPort1[EVENTS_TOTAL];
uint8_t newStatusPort1[EVENTS_TOTAL];
uint8_t lastStatusPort2[EVENTS_TOTAL];
uint8_t newStatusPort2[EVENTS_TOTAL];
void modeSelect(uint8_t m) {
digitalWrite(MODE_SELECT_PORT1, m);
digitalWrite(MODE_SELECT_PORT2, m);
delayMicroseconds(20);
}
void setup() {
//clear statusarrays (1=OFF, 0=ON)
for (uint8_t i = 0; i < EVENTS_TOTAL; i++) {
lastStatusPort1[i] = 1;
newStatusPort1[i] = 1;
lastStatusPort2[i] = 1;
newStatusPort2[i] = 1;
}
#if defined(VCC_PORT1) && defined(VCC_PORT2)
pinMode(VCC_PORT1, OUTPUT);
pinMode(VCC_PORT2, OUTPUT);
digitalWrite(VCC_PORT1, HIGH);
digitalWrite(VCC_PORT2, HIGH);
#endif
for (int i=0; i < INPUT_PINS_TOTAL; i++) {
pinMode(inputPinsPort1[i], INPUT_PULLUP);
pinMode(inputPinsPort2[i], INPUT_PULLUP);
}
pinMode(MODE_SELECT_PORT1, OUTPUT);
pinMode(MODE_SELECT_PORT2, OUTPUT);
modeSelect(HIGH);
Joystick[0].begin(false);
Joystick[1].begin(false);
}
void read3buttons() {
modeSelect(LOW);
newStatusPort1[4] = digitalRead(inputPinsPort1[4]); //A1
newStatusPort1[7] = digitalRead(inputPinsPort1[5]); //Start1
newStatusPort2[4] = digitalRead(inputPinsPort2[4]); //A2
newStatusPort2[7] = digitalRead(inputPinsPort2[5]); //Start2
modeSelect(HIGH);
for (uint8_t i=0; i < 4; i++) {
newStatusPort1[i] = digitalRead(inputPinsPort1[i]); //AXES1
newStatusPort2[i] = digitalRead(inputPinsPort2[i]); //AXES2
}
newStatusPort1[5] = digitalRead(inputPinsPort1[4]); //B1
newStatusPort1[6] = digitalRead(inputPinsPort1[5]); //C1
newStatusPort2[5] = digitalRead(inputPinsPort2[4]); //B2
newStatusPort2[6] = digitalRead(inputPinsPort2[5]); //C2
}
uint8_t flag1 = 0;
uint8_t flag2 = 0;
void loop() {
read3buttons();
//read X,Y,Z
modeSelect(LOW);
modeSelect(HIGH);
modeSelect(LOW);
modeSelect(HIGH);
newStatusPort1[8] = digitalRead(inputPinsPort1[2]); //X1
newStatusPort1[9] = digitalRead(inputPinsPort1[1]); //Y1
newStatusPort1[10] = digitalRead(inputPinsPort1[0]); //Z1
newStatusPort2[8] = digitalRead(inputPinsPort2[2]); //X2
newStatusPort2[9] = digitalRead(inputPinsPort2[1]); //Y2
newStatusPort2[10] = digitalRead(inputPinsPort2[0]); //Z2
delayMicroseconds(1000);
//check for changes - do not raise a flag if nothing changes
for (uint8_t i=0; i < EVENTS_TOTAL; i++) {
if (newStatusPort1[i] != lastStatusPort1[i]) {
lastStatusPort1[i] = newStatusPort1[i];
flag1 = 1;
}
if (newStatusPort2[i] != lastStatusPort2[i]) {
lastStatusPort2[i] = newStatusPort2[i];
flag2 = 1;
}
}
if (flag1) {
Joystick[0].setYAxis(0);
Joystick[0].setXAxis(0);
if (!newStatusPort1[0]) Joystick[0].setYAxis(-127); //UP
if (!newStatusPort1[1]) Joystick[0].setYAxis(127); //DOWN
if (!newStatusPort1[2]) Joystick[0].setXAxis(-127); //LEFT
if (!newStatusPort1[3]) Joystick[0].setXAxis(127); //RIGHT
Joystick[0].setButton(0, !newStatusPort1[4]); //BUTTON1
Joystick[0].setButton(1, !newStatusPort1[5]); //BUTTON2
Joystick[0].setButton(2, !newStatusPort1[6]); //BUTTON3
Joystick[0].setButton(3, !newStatusPort1[7]); //BUTTON4
Joystick[0].setButton(4, !newStatusPort1[8]); //BUTTON5
Joystick[0].setButton(5, !newStatusPort1[9]); //BUTTON6
Joystick[0].setButton(6, !newStatusPort1[10]); //BUTTON7
Joystick[0].sendState();
flag1 = 0;
}
if (flag2) {
Joystick[1].setYAxis(0);
Joystick[1].setXAxis(0);
if (!newStatusPort2[0]) Joystick[1].setYAxis(-127); //UP
if (!newStatusPort2[1]) Joystick[1].setYAxis(127); //DOWN
if (!newStatusPort2[2]) Joystick[1].setXAxis(-127); //LEFT
if (!newStatusPort2[3]) Joystick[1].setXAxis(127); //RIGHT
Joystick[1].setButton(0, !newStatusPort2[4]); //BUTTON1
Joystick[1].setButton(1, !newStatusPort2[5]); //BUTTON2
Joystick[1].setButton(2, !newStatusPort2[6]); //BUTTON3
Joystick[1].setButton(3, !newStatusPort2[7]); //BUTTON4
Joystick[1].setButton(4, !newStatusPort2[8]); //BUTTON5
Joystick[1].setButton(5, !newStatusPort2[9]); //BUTTON6
Joystick[1].setButton(6, !newStatusPort2[10]); //BUTTON7
Joystick[1].sendState();
flag2 = 0;
}
}