diff --git a/Examples/RetroJoystickAdapter-SegaGenesis.ino b/Examples/RetroJoystickAdapter-SegaGenesis.ino new file mode 100644 index 0000000..8d3bb36 --- /dev/null +++ b/Examples/RetroJoystickAdapter-SegaGenesis.ino @@ -0,0 +1,173 @@ +//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; + } + + +}