ddr pad emulates joystick

Author: arpruss

src/GameControllers.h

@@ -19,12 +19,20 @@
 
 #define INPUT_NOT_IMPLEMENTED ((unsigned)-1)
 
+#define DDR_PAD_EMULATES_STICK
+
 typedef struct {
     gpio_dev* device;
     uint32_t mask;
     uint32_t pinNumber;
 } PortData;
 
+const uint16_t gcmaskDLeft = 0x100;
+const uint16_t gcmaskDRight = 0x200;
+const uint16_t gcmaskDDown = 0x400;
+const uint16_t gcmaskDUp = 0x800;
+const uint16_t gcmaskDPad = 0xF00;
+
 typedef struct {
   uint16_t buttons;
   uint8_t joystickX;

src/gamecube.cpp

@@ -99,6 +99,27 @@ bool GameCubeController::readWithRumble(GameControllerData_t* data, bool rumble)
     data->cY = 1023-rescale(gcData.cY);
     data->shoulderLeft = rescale(gcData.shoulderLeft);
     data->shoulderRight = rescale(gcData.shoulderRight);
+#ifdef DDR_PAD_EMULATES_STICK
+    if (0 == (gcData.buttons & 0x20) && gcData.joystickX == 1 && gcData.joystickY == 1 && gcData.cX == 1 && gcData.cY == 1 && 
+            gcData.shoulderLeft == 1 && gcData.shoulderRight == 1 && gcData.buttons ) {
+        data->joystickX = 512;
+        data->joystickY = 512;
+        
+        if (gcData.buttons & gcmaskDLeft) {
+            data->joystickX = 0;
+        }
+        else if (gcData.buttons & gcmaskDRight) {
+            data->joystickX = 1023;
+        }
+        
+        if (gcData.buttons & gcmaskDUp) {
+            data->joystickY = 0;
+        }
+        else if (gcData.buttons & gcmaskDDown) {
+            data->joystickY = 1023;
+        }        
+    }
+#endif
     return true;
   }
   else {