Buttsimp/buttsimp.ino at master · OpenSimHardware/Buttsimp · GitHub

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#include <Keypad.h>
#include <Keyboard.h>


#define ENABLE_PULLUPS
#define NUMROTARIES 4
#define NUMBUTTONS 25
#define NUMROWS 5
#define NUMCOLS 5


//define the symbols on the buttons of the keypads
char buttons[NUMROWS][NUMCOLS] = {
  {'q','w','e','r','t'},
  {'y','u','i','o','p'},
  {'a','s','d','f','g'},
  {'h','j','k','l','z'},
  {'x','c','v','b','n'},
};


struct rotariesdef {
  byte pin1;
  byte pin2;
  int ccwchar;
  int cwchar;
  volatile unsigned char state;
};

rotariesdef rotaries[NUMROTARIES] {
  {0,1,KEY_RIGHT_ARROW,KEY_LEFT_ARROW,0},
  {2,3,KEY_DOWN_ARROW,KEY_UP_ARROW,0},
  {4,5,KEY_PAGE_UP,KEY_PAGE_DOWN,0},
  {6,7,KEY_HOME,KEY_END,0},
};


//
//Encoders code from Ben Buxton
//More info: http://www.buxtronix.net/2011/10/rotary-encoders-done-properly.html
//

#define DIR_CCW 0x10
#define DIR_CW 0x20

#define R_START 0x0
#define R_CW_FINAL 0x1
#define R_CW_BEGIN 0x2
#define R_CW_NEXT 0x3
#define R_CCW_BEGIN 0x4
#define R_CCW_FINAL 0x5
#define R_CCW_NEXT 0x6

const unsigned char ttable[7][4] = {
  // R_START
  {R_START,    R_CW_BEGIN,  R_CCW_BEGIN, R_START},
  // R_CW_FINAL
  {R_CW_NEXT,  R_START,     R_CW_FINAL,  R_START | DIR_CW},
  // R_CW_BEGIN
  {R_CW_NEXT,  R_CW_BEGIN,  R_START,     R_START},
  // R_CW_NEXT
  {R_CW_NEXT,  R_CW_BEGIN,  R_CW_FINAL,  R_START},
  // R_CCW_BEGIN
  {R_CCW_NEXT, R_START,     R_CCW_BEGIN, R_START},
  // R_CCW_FINAL
  {R_CCW_NEXT, R_CCW_FINAL, R_START,     R_START | DIR_CCW},
  // R_CCW_NEXT
  {R_CCW_NEXT, R_CCW_FINAL, R_CCW_BEGIN, R_START},
};


byte rowPins[NUMROWS] = {21,20,19,18,15}; //connect to the row pinouts of the keypad
byte colPins[NUMCOLS] = {14,16,10,9,8}; //connect to the column pinouts of the keypad

//initialize an instance of class NewKeypad
Keypad buttbx = Keypad( makeKeymap(buttons), rowPins, colPins, NUMROWS, NUMCOLS);


void setup() {
  Keyboard.begin();
  rotary_init();
}


void loop() {

  CheckAllEncoders();

  CheckAllButtons();

}


void CheckAllButtons(void) {
  char key = buttbx.getKey();
  if (key != NO_KEY)  {
    Keyboard.press(KEY_LEFT_CTRL);
    Keyboard.press(KEY_LEFT_ALT);
    Keyboard.press(key);
    delay(150);
    Keyboard.releaseAll();
  }//Keyboard.write(key);
}


/* Call this once in setup(). */
void rotary_init() {
  for (int i=0;i<NUMROTARIES;i++) {
    pinMode(rotaries[i].pin1, INPUT);
    pinMode(rotaries[i].pin2, INPUT);
    #ifdef ENABLE_PULLUPS
      digitalWrite(rotaries[i].pin1, HIGH);
      digitalWrite(rotaries[i].pin2, HIGH);
    #endif
  }
}


/* Read input pins and process for events. Call this either from a
 * loop or an interrupt (eg pin change or timer).
 *
 * Returns 0 on no event, otherwise 0x80 or 0x40 depending on the direction.
 */
unsigned char rotary_process(int _i) {
   unsigned char pinstate = (digitalRead(rotaries[_i].pin2) << 1) | digitalRead(rotaries[_i].pin1);
  rotaries[_i].state = ttable[rotaries[_i].state & 0xf][pinstate];
  return (rotaries[_i].state & 0x30);
}

void CheckAllEncoders(void) {
  for (int i=0;i<NUMROTARIES;i++) {
    unsigned char result = rotary_process(i);
    if (result) {
      Keyboard.write(result == DIR_CCW ? rotaries[i].ccwchar : rotaries[i].cwchar );
    }
  }
}