Arduinoでテレビのリモコンを作る方法

#define SW 2
#define IR_LED 5
#define frequency 38000

/*テスト用*/
#define LED 3

void LED_ON(void);
void LED_OFF(void);

void T_Wait(unsigned char wait_time);

void LED_Send_Reader(void);
void LED_Send_Data(unsigned char data);
void LED_Send_Stop(void);

void IR_Send(void);

/*グローバル変数*/
unsigned char Customcode = 0;
unsigned char Customcode_Checksum = 0;
unsigned char Data = 0;
unsigned char Data_Checksum = 0;

void setup() {
  Customcode = 0x40;
  Customcode_Checksum = 0xBF;
  Data = 0x12;
  Data_Checksum = 0xED;
  
  pinMode(IR_LED, OUTPUT);
  pinMode(SW, INPUT);

  /*テスト用*/
  pinMode(LED, OUTPUT);
}

void loop() {
  if (digitalRead(SW) == 1) {
    IR_Send();
    while(digitalRead(SW) == 1);
  }
}

void LED_ON(void) {
  tone(IR_LED, frequency);
  digitalWrite(LED, HIGH);
}

void LED_OFF(void) {
  noTone(IR_LED);
  digitalWrite(LED, LOW);
}

void T_Wait(unsigned char wait_time) {
  while(wait_time != 0) {
    delayMicroseconds(270); /*本来は562*/
    wait_time--;
  }
}

void LED_Send_Reader(void) {
  LED_ON();
  T_Wait(16);
  LED_OFF();
  T_Wait(16);
}
void LED_Send_Data(unsigned char data) {
  int i = 0;

  for(i = 0; i < 8; i++) {
    LED_ON();
    T_Wait(1);

    LED_OFF();
    if ((data & 0x01) == 0x01) {
      T_Wait(6);
    } else {
      T_Wait(2);
    }
    data = data >> 1;
  }
}
void LED_Send_Stop(void) {
  LED_ON();
  T_Wait(1);
  LED_OFF();
}

void IR_Send(void) {
  /*リーダーコード*/
  LED_Send_Reader();

  /*カスタムコード*/
  LED_Send_Data(Customcode);
  LED_Send_Data(Customcode_Checksum);

  /*データ*/
  LED_Send_Data(Data);
  LED_Send_Data(Data_Checksum);

  /*ストップビット*/
  LED_Send_Stop();
}

#include 

LiquidCrystal lcd(3, 4, 5, 6, 7, 8);

#define Sensor 2

struct format {
  unsigned int header_High;
  unsigned int header_Low;
  unsigned char custom_code;
  unsigned char custom_code_checksum;
  unsigned char data;
  unsigned char data_checksum;
};

struct format receive_data;

void judge(unsigned char *data);

void setup() {
  lcd.begin(16, 2);
  pinMode(Sensor, INPUT);
}

void loop() {
  
  /*ヘッダーの判定*/
  receive_data.header_Low = pulseIn(Sensor, HIGH);

  if ((receive_data.header_Low > 4053) && (receive_data.header_Low < 4954)) {
    judge(&receive_data.custom_code);
    judge(&receive_data.custom_code_checksum);
    judge(&receive_data.data);
    judge(&receive_data.data_checksum);

    if((receive_data.custom_code + receive_data.custom_code_checksum) != 0xFF) {
      //エラー
    } else {
      if((receive_data.data + receive_data.data_checksum) != 0xFF) {
        //エラー
      }
    }
    lcd.clear();
    lcd.setCursor(0,0);
    lcd.print(receive_data.data);
  } else {
    //エラー
  }
}

void judge(unsigned char *data) {
  int i = 0;
  unsigned bit_data = 0;

  *data = 0;
  
  for (i = 0; i < 8; i++) {
     if(pulseIn(Sensor, HIGH) > 619) {
        bit_data = 1;
     } else {
        bit_data = 0;
     }
     *data |= bit_data << i;
  }
}