MC-10 Keyboard Arduino for Teensy 2.0

// MC-10 Keyboard Arduino for Teensy 2.0
// Ray Dios Haque - ray@oddree.com - 10/2012

#include "Keypad.h"

const byte ROWS = 7; //seven rows
const byte COLS = 8; //eight columns
char keys[ROWS][COLS] = {
/*  1   2   3   4   5   6   7   8  */
  {'@','a','b','c','d','e','f','g'}, // ROW 1
  {'h','i','j','k','l','m','n','o'}, // ROW 2
  {'p','q','r','s','t','u','v','w'}, // ROW 3
  {'x','y','z','NO_KEY','NO_KEY','NO_KEY','KEY_ENTER',' '}, // ROW 4
  {'0','1','2','3','4','5','6','7'}, // ROW 5
  {'8','9',':',';',',','-','.','/'}, // ROW 6
  {'KEY_CONTROL','NO_KEY','KEY_BACKSPACE','NO_KEY','NO_KEY','NO_KEY','NO_KEY','KEY_RIGHTSHIFT'}  // ROW 7
};

byte rowPins[ROWS] = {14, 15, 17, 18, 19, 20, 21}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {0, 1, 2, 3, 4, 5, 6, 7}; //connect to the column pinouts of the keypad

Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

boolean shiftkey = false;  // Assuming from the get-go that SHIFT is not pressed!
boolean controlkey = false; // Assuming from the get-go that the Control Key is not pressed!

void setup(){
  //Serial.begin(9600);
}

void loop(){

  char key = keypad.getKey();

  if (key != NO_KEY){
      if (controlkey == true) {
            switch (key) {
            // F1 - F12 keys
              case'1': Keyboard.set_key1(KEY_F1); Keyboard.send_now(); break;
              case'2': Keyboard.set_key1(KEY_F2); Keyboard.send_now(); break;
              case'3': Keyboard.set_key1(KEY_F3); Keyboard.send_now(); break;
              case'4': Keyboard.set_key1(KEY_F4); Keyboard.send_now(); break;
              case'5': Keyboard.set_key1(KEY_F5); Keyboard.send_now(); break;
              case'6': Keyboard.set_key1(KEY_F6); Keyboard.send_now(); break;
              case'7': Keyboard.set_key1(KEY_F7); Keyboard.send_now(); break;
              case'8': Keyboard.set_key1(KEY_F8); Keyboard.send_now(); break;
              case'9': Keyboard.set_key1(KEY_F9); Keyboard.send_now(); break;
              case'0': Keyboard.set_key1(KEY_F10); Keyboard.send_now(); break;
              case':': Keyboard.set_key1(KEY_F11); Keyboard.send_now(); break;
              case'_': Keyboard.set_key1(KEY_F12); Keyboard.send_now(); break;
            // Arrow keys
              case'w': Keyboard.set_key1(KEY_UP); Keyboard.send_now(); break;
              case'z': Keyboard.set_key1(KEY_DOWN); Keyboard.send_now(); break;
              case'a': Keyboard.set_key1(KEY_LEFT); Keyboard.send_now(); break;
              case's': Keyboard.set_key1(KEY_RIGHT); Keyboard.send_now(); break;
            // Need a TAB key, of course
              case'KEY_ENTER': Keyboard.set_key1(KEY_TAB); Keyboard.send_now(); break;
            // Control Backspace (break key) = DELETE
              case'KEY_BACKSPACE': Keyboard.set_key1(KEY_DELETE); Keyboard.send_now(); break;
            // Control twice = ESC
              case'KEY_CONTROL': Keyboard.set_key1(KEY_ESC); Keyboard.send_now(); break;
              }
            Keyboard.set_key1(0); Keyboard.send_now(); // Reset to no keys being pressed
            controlkey = false; // Now leaving control key routine - so we reset the control.
      }
      else if (shiftkey == true) {
            switch (key) {
            // We pressed the shift key, so this is a CAP or uppper
              case '1': Keyboard.print('!'); break;
              case '2': Keyboard.print('"'); break;
              case '3': Keyboard.print('#'); break;
              case '4': Keyboard.print('$'); break;
              case '5': Keyboard.print('%'); break;
              case '6': Keyboard.print('&'); break;
              case '7': Keyboard.print('\''); break; // Note the backslash to escape the single quote!
              case '8': Keyboard.print('('); break;
              case '9': Keyboard.print(')'); break;
              case ':': Keyboard.print('*'); break;
              case '-': Keyboard.print('='); break;

              case ';': Keyboard.print('+'); break;
              case ',': Keyboard.print('<'); break;
              case '.': Keyboard.print('>'); break;
              case '/': Keyboard.print('?'); break;

              case 'a': Keyboard.print('A'); break;
              case 'b': Keyboard.print('B'); break;
              case 'c': Keyboard.print('C'); break;
              case 'd': Keyboard.print('D'); break;
              case 'e': Keyboard.print('E'); break;
              case 'f': Keyboard.print('F'); break;
              case 'g': Keyboard.print('G'); break;
              case 'h': Keyboard.print('H'); break;
              case 'i': Keyboard.print('I'); break;
              case 'j': Keyboard.print('J'); break;
              case 'k': Keyboard.print('K'); break;
              case 'l': Keyboard.print('L'); break;
              case 'm': Keyboard.print('M'); break;
              case 'n': Keyboard.print('N'); break;
              case 'o': Keyboard.print('O'); break;
              case 'p': Keyboard.print('P'); break;
              case 'q': Keyboard.print('Q'); break;
              case 'r': Keyboard.print('R'); break;
              case 's': Keyboard.print('S'); break;
              case 't': Keyboard.print('T'); break;
              case 'u': Keyboard.print('U'); break;
              case 'v': Keyboard.print('V'); break;
              case 'w': Keyboard.print('W'); break;
              case 'x': Keyboard.print('X'); break;
              case 'y': Keyboard.print('Y'); break;
              case 'z': Keyboard.print('Z'); break;

              case 'KEY_RIGHTSHIFT':
              // Tap SHIFT twice to CTRL+ALT+DELETE
                  Keyboard.set_modifier(MODIFIERKEY_CTRL);
                  Keyboard.send_now();
                  Keyboard.set_modifier(MODIFIERKEY_CTRL | MODIFIERKEY_ALT);
                  Keyboard.send_now();
                  Keyboard.set_key1(KEY_DELETE);
                  Keyboard.send_now();
                  Keyboard.set_modifier(0);
                  Keyboard.set_key1(0);
                  Keyboard.send_now();
                  break;
            }
        shiftkey = false; // Now leaving shift key routine - so we reset the shift.
      }
      // Normal key presses
      else {
      switch (key) {
        case 'KEY_BACKSPACE':
          Keyboard.set_key1(KEY_BACKSPACE);
          Keyboard.send_now();
          Keyboard.set_key1(0);
          Keyboard.send_now();
        break;
        case 'KEY_ENTER':
          Keyboard.set_key1(KEY_ENTER);
          Keyboard.send_now();
          Keyboard.set_key1(0);
          Keyboard.send_now();
        break;
        case 'KEY_CONTROL':
          controlkey = true; // Next key will be a CONTROL key
        break;
        case 'KEY_RIGHTSHIFT':
          shiftkey = true; // Next key will be a CAP KEY or upper key
        break;
        default:
          //Serial.println(key);
          Keyboard.print(key);
        break;
        }
      }
  }
}