//-------------------------------------------------------------------------------------------------------------------------
/* 
 *  IrDA receive data print program 
 *    IRreceive_print01.ino
 *      2020.5.28

 * Original Scketch
   ATtiny85 IR Remote Control Receiver
   David Johnson-Davies - www.technoblogy.com - 3rd April 2015
   ATtiny85 @ 1 MHz (internal oscillator; BOD disabled)
   CC BY 4.0
   Licensed under a Creative Commons Attribution 4.0 International license: 
   http://creativecommons.org/licenses/by/4.0/
*/

#include <SoftwareSerial.h>//ソフトウェアシリアルの設定を追記
SoftwareSerial mySerial(3, 4); // RX(PB3:Pin2), TX(PB4:Pin3) ソフトウェアシリアルの設定を追記

// LED outputs
int LED = 1;   // LED indicator PB1(Pin6)

volatile int NextBit;
volatile unsigned long RecdData;
volatile int Rcvflag = 0; //受信フラグ
volatile int RcvDATA; //32bitのデータを収納する変数

char HEXprint[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'} ;

//ネオピクセル 
#include <Adafruit_NeoPixel.h>
#ifdef __AVR__
#include <avr/power.h>
#endif

#define PIN 1

// Parameter 1 = number of pixels in strip
// Parameter 2 = Arduino pin number (most are valid)
// Parameter 3 = pixel type flags, add together as needed:
//   NEO_KHZ800  800 KHz bitstream (most NeoPixel products w/WS2812 LEDs)
//   NEO_KHZ400  400 KHz (classic 'v1' (not v2) FLORA pixels, WS2811 drivers)
//   NEO_GRB     Pixels are wired for GRB bitstream (most NeoPixel products)
//   NEO_RGB     Pixels are wired for RGB bitstream (v1 FLORA pixels, not v2)
//   NEO_RGBW    Pixels are wired for RGBW bitstream (NeoPixel RGBW products)
Adafruit_NeoPixel strip = Adafruit_NeoPixel(1, PIN, NEO_GRB + NEO_KHZ800);

// IMPORTANT: To reduce NeoPixel burnout risk, add 1000 uF capacitor across
// pixel power leads, add 300 - 500 Ohm resistor on first pixel's data input
// and minimize distance between Arduino and first pixel.  Avoid connecting
// on a live circuit...if you must, connect GND first.

// Setup **********************************************

void setup() {
  // Set up LEDs
  pinMode(LED, OUTPUT);

  // initialize Serial Port
  mySerial.begin(9600); 
  delay(500);
  mySerial.println("Serial connect"); 

  // Set up Timer/Counter0 (assumes 8MHz clock)
  TCCR0A = 0;                 // No compare matches
  TCCR0B = 5<<CS00;           // Prescaler /64　でもプログラムでは"3"になっていた。これがInternal：1Mhzを8Mhzに変更するClock
  // Set up INT0 interrupt on PB2
  MCUCR = MCUCR | 2<<ISC00;   // Interrupt on falling edge
  GIMSK = GIMSK | 1<<INT0;    // Enable INT0
  NextBit = 32;               // Wait for AGC start pulse

  //ネオピクセル-------
  // This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket
  #if defined (__AVR_ATtiny85__)
    if (F_CPU == 16000000) clock_prescale_set(clock_div_1);
  #endif
  // End of trinket special code

  strip.begin();
  strip.setBrightness(50);
  strip.show(); // Initialize all pixels to 'off'
  //ネオピクセル-------
}

void loop() { //Rcvfla=Receiveflagの略
  if (Rcvflag != 0){ //!=0・・・受信ができた
    Rcvflag = 0; //受信内容を理解したので消している
    char Pdata = (RcvDATA & 0xF0)>>4 ; // pickup upper 4 bits キーデータの最初の４bitだけ取り出している　受信したデータをシリアルコンソールに表示するコード※キーコードのみ（以下54行目〜
    mySerial.print(HEXprint[Pdata]);   // print in HEX
    Pdata = (RcvDATA & 0x0F);          // pickup lower 4 bits 残りの4bitを取り出している
    mySerial.println(HEXprint[Pdata]); // print in HEX
    //ネオピクセル------
    uint32_t c; //int c;を変更
    switch(RcvDATA){
      case 0x16:
        c = 0x000000;
        break;
      case 0x0C:
        c = 0xFF0000;
        break;
      case 0x18:
        c = 0x00FF00;
        break;
      case 0x5E:
        c = 0x0000FF;
        break;                        
    }
    colorWipe(c,0);
    //ネオピクセル------
  }
}

// *** Interrupt service routine - called on every falling edge of PB2 ***

ISR(INT0_vect) {
  int Time = TCNT0;
  int Overflow = TIFR & 1<<TOV0;
  // Keep looking for AGC pulse and gap
  if (NextBit == 32) {
    if ((Time >= 87) && (Time <= 114) && (Overflow == 0)) {
      RecdData = 0; NextBit = 0;
    } else if ((Time >= 80) && (Time <= 97) && (Overflow == 0)) ReceivedCode(1);
  // Data bit
  } else {
    if ((Time > 22) || (Overflow != 0)) NextBit = 32; // Invalid - restart
    else {
      if (Time > 13) RecdData = RecdData | ((unsigned long) 1<<NextBit);
      if (NextBit == 31) ReceivedCode(0);
      NextBit++;
    }
  }
  TCNT0 = 0;                  // Clear counter
  TIFR = TIFR | 1<<TOV0;      // Clear overflow
  GIFR = GIFR | 1<<INTF0;     // Clear INT0 flag
}

// Main Process after IrDA data received
void ReceivedCode(boolean Repeat) {
  // Check for correct remote control
  if ((RecdData & 0xFFFF) != 0xff00) return; // check the maker_code 0xFF
  // Read key pressed
  RcvDATA = RecdData>>16 & 0xFF;

  // Set DATA receivedflag for SerialPrint
  Rcvflag = 1;

}

//colorWipe(c,0);でエラーが起きたので追記
void colorWipe(uint32_t c, uint8_t wait) {
  for(uint16_t i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, c);
      strip.show();
      delay(wait);
  }
}
//colorWipe(c,0);でエラーが起きたので追記