SegaController v1.1 commit

* Added sega_contorller_leo
* Added "MODE" button support
* See blog post at  https://jonthysell.com/2014/09/29/sega-genesis-controllers-and-arduino-revisited/

Author: jonthysell

README.md

@@ -1,8 +1,14 @@
 # SegaController #
 
-SegaController consists of a simple Arduino sketch to read the buttons from the Sega Genesis three and six button controllers.
+SegaController consists of two simple Arduino sketches which read the buttons from the Sega Genesis three and six button controllers.
 
-More details at: [Reading Sega Genesis controllers with Arduino](https://jonthysell.com/2014/07/26/reading-sega-genesis-controllers-with-arduino/)
+1. sega_contoller: Reports button presses via Serial. Tested on the Uno and Leonardo.
+2. sega_controller_leo: Reports button presses via Keyboard. Tested on the Leonardo.
+
+More details at:
+
+* [Reading Sega Genesis controllers with Arduino](https://jonthysell.com/2014/07/26/reading-sega-genesis-controllers-with-arduino/)
+* [Sega Genesis controllers and Arduino revisited](https://jonthysell.com/2014/09/29/sega-genesis-controllers-and-arduino-revisited/)
 
 ## Copyright ##
 

sega_controller/sega_controller.ino

@@ -1,8 +1,8 @@
 /*
  * Sega Controller Reader
  * Author: Jon Thysell <thysell@gmail.com>
- * Version: 1.0
- * Date: 7/26/2014
+ * Version: 1.1
+ * Date: 9/29/2014
  *
  * Reads buttons presses from Sega Genesis 3/6 button controllers
  * and reports their state via the Serial connection. Handles hot
@@ -11,6 +11,8 @@
  *
  */
 
+const int PLAYERS = 2;
+ 
 // Controller Button Flags
 const int ON = 1;
 const int UP = 2;
@@ -24,6 +26,7 @@ const int C = 256;
 const int X = 512;
 const int Y = 1024;
 const int Z = 2048;
+const int MODE = 4096;
 
 // Controller DB9 Pin 7 Mappings
 const int SELECT[] = { 8, 9 };
@@ -40,20 +43,20 @@ typedef struct
 // Controller DB9 Pin to Button Flag Mappings
 // First column is the controller index, second column
 // is the Arduino pin that the controller's DB9 pin is
-// attached to
+// attached to, remaing columns are the button flags
 input inputMap[] = {
-  { 0,  2,  UP,    UP,     Z}, // P0 DB9 Pin 1
-  { 0,  3,  DOWN,  DOWN,   Y}, // P0 DB9 Pin 2
-  { 0,  4,  ON,    LEFT,   X}, // P0 DB9 Pin 3
-  { 0,  5,  ON,    RIGHT,  0}, // P0 DB9 Pin 4
-  { 0,  6,  A,     B,      0}, // P0 DB9 Pin 6
-  { 0,  7,  START, C,      0}, // P0 DB9 Pin 9
-  { 1,  A0, UP,    UP,     Z}, // P1 DB9 Pin 1
-  { 1,  A1, DOWN,  DOWN,   Y}, // P1 DB9 Pin 2
-  { 1,  A2, ON,    LEFT,   X}, // P1 DB9 Pin 3
-  { 1,  A3, ON,    RIGHT,  0}, // P1 DB9 Pin 4
-  { 1,  A4, A,     B,      0}, // P1 DB9 Pin 6
-  { 1,  A5, START, C,      0}  // P1 DB9 Pin 9
+  { 0,  2,  UP,    UP,     Z    }, // P0 DB9 Pin 1
+  { 0,  3,  DOWN,  DOWN,   Y    }, // P0 DB9 Pin 2
+  { 0,  4,  ON,    LEFT,   X    }, // P0 DB9 Pin 3
+  { 0,  5,  ON,    RIGHT,  MODE }, // P0 DB9 Pin 4
+  { 0,  6,  A,     B,      0    }, // P0 DB9 Pin 6
+  { 0,  7,  START, C,      0    }, // P0 DB9 Pin 9
+  { 1,  A0, UP,    UP,     Z    }, // P1 DB9 Pin 1
+  { 1,  A1, DOWN,  DOWN,   Y    }, // P1 DB9 Pin 2
+  { 1,  A2, ON,    LEFT,   X    }, // P1 DB9 Pin 3
+  { 1,  A3, ON,    RIGHT,  MODE }, // P1 DB9 Pin 4
+  { 1,  A4, A,     B,      0    }, // P1 DB9 Pin 6
+  { 1,  A5, START, C,      0    }  // P1 DB9 Pin 9
 };
 
 // Controller State
@@ -71,14 +74,14 @@ void setup()
     pinMode(inputMap[i].pin, INPUT);
     digitalWrite(inputMap[i].pin, HIGH);
   }
-   
+  
   // Setup select pins
-  for (int i = 0; i < 2; i++)
+  for (int i = 0; i < PLAYERS; i++)
   {
     pinMode(SELECT[i], OUTPUT);
     digitalWrite(SELECT[i], HIGH);
   }
-   
+  
   Serial.begin(9600);
 }
 
@@ -90,7 +93,7 @@ void loop()
 
 void readButtons()
 {
-  for (int i = 0; i < 2; i++)
+  for (int i = 0; i < PLAYERS; i++)
   {
     resetState(i);
     if (sixButtonMode[i])
@@ -148,49 +151,49 @@ void read3buttons(int player)
   {
     sixButtonMode[player] = false;
   }
-   
+  
   delayMicroseconds(20);
 }
 
 void read6buttons(int player)
-{ 
+{
   // Poll for three-button states twice
   read3buttons(player);
   read3buttons(player);
-   
+  
   // After two three-button polls, pulse the SELECT line
   // so the six-button reports the higher button states
   digitalWrite(SELECT[player], LOW);
   delayMicroseconds(20);
   digitalWrite(SELECT[player], HIGH);
-   
+  
   for(int i = 0; i < sizeof(inputMap) / sizeof(input); i++)
   {
     if (inputMap[i].player == player && digitalRead(inputMap[i].pin) == LOW)
     {
       currentState[player] |= inputMap[i].pulse3Flag;
     }
   }
-   
+  
   delayMicroseconds(1000);
 }
 
 void sendStates()
 {
   // Only report controller states if at least one has changed
   boolean hasChanged = false;
-   
-  for (int i = 0; i < 2; i++)
+  
+  for (int i = 0; i < PLAYERS; i++)
   {
     if (currentState[i] != lastState[i])
     {
       hasChanged = true;
     }
   }
-   
+  
   if (hasChanged)
-  { 
-    for (int i = 0; i < 2; i++)
+  {
+    for (int i = 0; i < PLAYERS; i++)
     {
       Serial.print((currentState[i] & ON) == ON ? "+" : "-");
       Serial.print((currentState[i] & UP) == UP ? "U" : "0");
@@ -204,10 +207,10 @@ void sendStates()
       Serial.print((currentState[i] & X) == X ? "X" : "0");
       Serial.print((currentState[i] & Y) == Y ? "Y" : "0");
       Serial.print((currentState[i] & Z) == Z ? "Z" : "0");
+      Serial.print((currentState[i] & MODE) == MODE ? "M" : "0");
 
       Serial.print((i == 0) ? "," : "\n");
       lastState[i] = currentState[i];
     }
   }
 }
-