LCD×タクトスイッチ文字入力

LCD.ino

// LCDキャラクタディスプレイ関数のインクルード
#include <LiquidCrystal.h>

// 接続メモ
// LiquidCrystal display with:
// rs on pin 12
// rw on pin 11
// enable on pin 10 
// d0, d1, d2, d3 on pins 5, 4, 3, 2
// 使用するピンの定義
LiquidCrystal lcd(12, 11, 10, 5, 4, 3, 2);

int UP_KEY = 8;
int RIGHT_KEY = 9;
int BOTTOM_KEY = 7;
int LEFT_KEY = 6;

int pos = 0;
int c = 0x41;
int cnt = 0;

boolean isPushed = false;

void setup()
{
  lcd.begin(2, 16);
  lcd.clear();
  lcd.print("Type Message");
  delay(500);
}

void loop()
{
  lcd.setCursor(pos, 1);
  
  if (cnt < 5 || isPushedSelect) {
    lcd.write(c);
  } else {
    lcd.write(0xFF);
  }
  cnt++;
  cnt = cnt % 10;

  if (isPushed == false) {
    if (digitalRead(UP_KEY) == HIGH) {
      charStep();
      cnt = 0;
    } else if (digitalRead(BOTTOM_KEY) == HIGH) {
      charBackStep();
      cnt = 0;
    } else if (digitalRead(RIGHT_KEY) == HIGH) {
      lcd.setCursor(pos, 1);
      lcd.write(c);
  
      pos++;
      pos = pos % 16;
      c = 0x20;
      cnt = 0;
    } else if (digitalRead(LEFT_KEY) == HIGH) {
      lcd.setCursor(pos, 1);
      lcd.write(c);
  
      pos += 15;
      pos = pos % 16;
      c = 0x20;
      cnt = 0;
    }
  }
  
  isPushed = (digitalRead(UP_KEY) == HIGH) ||
             (digitalRead(BOTTOM_KEY) == HIGH) ||
             (digitalRead(RIGHT_KEY) == HIGH) ||
             (digitalRead(LEFT_KEY) == HIGH);

  delay(100);
}

void charStep()
{
  if (c == 0x5A) {
    c = 0x20;
  } else if (c == 0x20) {
    c = 0x41;
  } else {
    c++;
  }
}

void charBackStep()
{
  if (c == 0x41) {
    c = 0x20;
  } else if (c == 0x20) {
    c = 0x5A;
  } else {
    c--;
  }
}