====== キーボードの動作模倣 ======

{{:key.png?400|}}


#include "Keyboard.h"

const int KEYIN[] = { 8, 9 };
const int KEYOUT[] = { 2, 3, 4, 5 };

unsigned long previousMillis = 0;
const long interval = 30;
int columnNum = 0;
int sw[4][2] = { 0 };
char keyMap[4][2] = {
  { 'A', 'B' },
  { 'C', 'D' },
  { 'E', 'F' },
  { 'G', 'H' }
};

void setup() {
  for (int i = 0; i < 4; i++) {
    pinMode(KEYOUT[i], OUTPUT);
    digitalWrite(KEYOUT[i], LOW);
  }
  for (int i = 0; i < 2; i++) {
    pinMode(KEYIN[i], INPUT);
  }
  Keyboard.begin();
}

void loop() {
  unsigned long currentMillis = millis();

  if (currentMillis - previousMillis >= interval) {
    previousMillis = currentMillis;
    digitalWrite(KEYOUT[columnNum], HIGH);

    for (int rowNum = 0; rowNum < 2; rowNum++) {
      int readValue = digitalRead(KEYIN[rowNum]);
      if (readValue != sw[columnNum][rowNum] && readValue == HIGH) {
        keyPress(keyMap[columnNum][rowNum]);
      }

      sw[columnNum][rowNum] = readValue;
      delay(10);
      Keyboard.releaseAll();
    }

    digitalWrite(KEYOUT[columnNum], LOW);
    columnNum++;
    columnNum %= 4;
  }
}

void keyPress(char key) {
  switch (key) {
    case 'A':
      Keyboard.write('p');
      Keyboard.write('r');
      Keyboard.write('i');
      Keyboard.write('n');
      Keyboard.write('t');
      Keyboard.write('(');
      Keyboard.write(')');
      break;

    case 'B':
      Keyboard.press(KEY_LEFT_ALT);
      Keyboard.press(KEY_RIGHT_ARROW);
      break;

    case 'C':
      Keyboard.press(KEY_LEFT_GUI);
      Keyboard.press('/');
      break;

    case 'D':
      Keyboard.press(KEY_LEFT_ALT);
      Keyboard.press(KEY_LEFT_ARROW);
      break;

    case 'E':
      Keyboard.press(KEY_LEFT_GUI);
      Keyboard.press(KEY_LEFT_CTRL);
      Keyboard.press('j');
      break;

    case 'F':
      Keyboard.press(KEY_LEFT_GUI);
      Keyboard.press(KEY_RIGHT_ARROW);
      break;

    case 'G':
      Keyboard.press(KEY_LEFT_CTRL);
      Keyboard.press('i');
      break;

    case 'H':
      Keyboard.press(KEY_LEFT_GUI);
      Keyboard.press(KEY_LEFT_ARROW);
      break;

    default:
      break;
  }
}