/***************************************************
DFPlayer - A Mini MP3 Player For Arduino
 <https://www.dfrobot.com/index.php?route=product/product&search=mp3&description=true&product_id=1121>
 
 ***************************************************
 This example shows the basic function of library for DFPlayer.
 
 Created 2014-8-28
 By [Angelo qiao](Angelo.qiao@dfrobot.com)
 
 GNU Lesser General Public License.
 See <http://www.gnu.org/licenses/> for details.
 All above must be included in any redistribution
 ****************************************************/

/***********Notice and Trouble shooting***************
 1.Connection and Diagram can be found here
 <>
 2.This code is tested on Arduino Uno, Leonardo, Mega boards.
 ****************************************************/

#include "Arduino.h"
#include "SoftwareSerial.h"
#include "DFRobotDFPlayerMini.h"
// rx 3

#include <avr/sleep.h>
#define BODS 7                     //BOD Sleep bit in MCUCR
#define BODSE 2                    //BOD Sleep enable bit in MCUCR

#define RX    3   // *** D3, Pin 2
#define TX    4   // *** D4, Pin 3

SoftwareSerial softSerial(RX, TX); // RX, TX
DFRobotDFPlayerMini myDFPlayer;
void printDetail(uint8_t type, int value);

void setup()
{
  softSerial.begin(9600);
 
  
  if (!myDFPlayer.begin(softSerial)) {  //Use softwareSerial to communicate with mp3.
    
  }
  myDFPlayer.outputDevice(DFPLAYER_DEVICE_SD);
  myDFPlayer.enableDAC();
  delay(200);
  myDFPlayer.volume(30);  //Set volume value. From 0 to 30
  myDFPlayer.play(1);  //Play the first mp3
}

void loop()
{
  if (myDFPlayer.available()) {
    uint8_t type = myDFPlayer.readType();
    if (type == DFPlayerPlayFinished)
    {
      // sleep();
      // myDFPlayer.play(1);
      myDFPlayer.disableDAC();
      myDFPlayer.sleep();
      mcu_sleep();
    }
  }
}

void mcu_sleep()
{
  byte  mcucr1, mcucr2;

  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
  sleep_enable();
  MCUCR &= ~(_BV(ISC01) | _BV(ISC00));      //INT0 on low level
  ADCSRA &= ~_BV(ADEN);                     //disable ADC
  cli();                                    //stop interrupts to ensure the BOD timed sequence executes as required
  mcucr1 = MCUCR | _BV(BODS) | _BV(BODSE);  //turn off the brown-out detector
  mcucr2 = mcucr1 & ~_BV(BODSE);            //if the MCU does not have BOD disable capability,
  MCUCR = mcucr1;                           //  this code has no effect
  MCUCR = mcucr2;
  sleep_cpu();
}