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