CNC Keypad / Custom USB Keyboard for LinuxCNC

cnc_keypad.ino

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

const int KEYDELAY = 100;
const int SEQDELAY = 500;

const byte ROWS = 2;
const byte COLS = 4;
// Define the Keymap
/* 
  Cycle Start | Resume | Touch Off | Pause
  Up | Down | Left | Right
*/
char keys[ROWS][COLS] = {
  {'1','2','3','4'},
  {'5','6','7','8'}
};

byte rowPins[ROWS] = { 10, 16 }; 
byte colPins[COLS] = { 6, 7, 8, 9 };

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

void setup() {
  keypad.addEventListener(keypadEvent); // Add an event listener for this keypad
}


void loop() {
  char key = keypad.getKey();
  if(key)  // Check for a valid key.
  {
    switch (key)
    {
      case '1':
        // Cycle Start
        Keyboard.begin();
        
        Keyboard.press('r');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        Keyboard.end();
        break;
      case '2':
        // Resume
        Keyboard.begin();
        
        Keyboard.press('s');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        Keyboard.end();
        break;
      case '3':
        // Touch Off
        Keyboard.begin();
        
        Keyboard.press('x');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(200);
        
        Keyboard.press(KEY_END);
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(SEQDELAY);
        
        Keyboard.press('0');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(200);
        
        Keyboard.press(KEY_RETURN);
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(SEQDELAY);
        
        Keyboard.press('y');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(200);
        
        Keyboard.press(KEY_END);
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(SEQDELAY);
        
        Keyboard.press('0');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(200);
        
        Keyboard.press(KEY_RETURN);
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(SEQDELAY);
        
        Keyboard.press('z');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(200);
        
        Keyboard.press(KEY_END);
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(SEQDELAY);
        
        Keyboard.press('0');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(200);
        
        Keyboard.press(KEY_RETURN);
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        delay(SEQDELAY);
        
        Keyboard.press('x');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        Keyboard.end();
        break;
      case '4':
        // Pause
        Keyboard.begin();
        
        Keyboard.press('p');
        delay(KEYDELAY);
        Keyboard.releaseAll();
        
        Keyboard.end();
        break;
    }
  }
}

// Taking care of some special events.
void keypadEvent(KeypadEvent key){
    switch (keypad.getState()){
    case PRESSED:
        if (key == '5') {
          Keyboard.begin();
          Keyboard.press(KEY_UP_ARROW);
        } else if (key == '6') {
          Keyboard.begin();
          Keyboard.press(KEY_DOWN_ARROW);
        } else if (key == '7') {
          Keyboard.begin();
          Keyboard.press(KEY_LEFT_ARROW);
        } else if (key == '8') {
          Keyboard.begin();
          Keyboard.press(KEY_RIGHT_ARROW);
        }
        break;

    case RELEASED:
        if (key == '5') {
          Keyboard.releaseAll();
          Keyboard.end();
        } else if (key == '6') {
          Keyboard.releaseAll();
          Keyboard.end();
        } else if (key == '7') {
          Keyboard.releaseAll();
          Keyboard.end();
        } else if (key == '8') {
          Keyboard.releaseAll();
          Keyboard.end();
        }
        break;

    case HOLD:

        break;
    }
}