TwoWireThreeSwitch.ino

// 二線で三つのスイッチを読む
// 2017/06/12
// edy
//

#include "Keyboard.h"
int analogPin = A0;
int ADCresult = 0;
int SW = 0;

void setup() {
  Keyboard.begin();
  analogReference(DEFAULT);
}

void loop() {
  SW = readSW();
  switch (SW) {
    case 5: // open
      break;
    case 4: // all off
      break;
    case 3:  tab_key();
      break;
    case 2: shift_tab_key();
      break;
    case 1:
      break;
    case 0: // short
      break;
    default:
      break;
  }
  delay(100);
}

int readSW(void)
{
  int ADCresult = analogRead(analogPin);
  return (ADCresult + 102) / 205;
}

void tab_key(void)
{
  Keyboard.press(KEY_TAB);
  delay(100);
  Keyboard.releaseAll();//  Keyboard.release(KEY_TAB);

  while (readSW() == 3) {
    delay(100);
  }
}

void shift_tab_key(void)
{
  Keyboard.press(KEY_LEFT_SHIFT);
  Keyboard.press(KEY_TAB);
  delay(100);
  Keyboard.releaseAll();

  while (readSW() == 2) {
    delay(100);
  }
}