Mp3 player

Placed on 2020-06-27

The code

In this code we use the TMPpcm and SD library. Normally the SD library is already installed. The others can be found at this link: https://github.com/TMRh20/TMRpcm . To install the library press: Scetch > Include library > Add zip library.

To begin with, we define our libraries and variables

#include "SD.h"
#define SD_ChipSelectPin 10
#include "TMRpcm.h"

const int LED_SD =  8;   
const int BUTTON_PIN1 = 2;
const int BUTTON_PIN2 = 3; 
const int BUTTON_PIN3 = 4; 
int buttonState1 = 0;   
int buttonState2 = 0;
int buttonState3 = 0;
int setvolume = 6;
int song = 1;
int names[] = {"1.wav","2.wav","3.wav","4.wav","5.wav","6.wav"};

TMRpcm audio;

then we set everything up

void setup(){
  pinMode(BUTTON_PIN1, INPUT_PULLUP);
  pinMode(BUTTON_PIN2, INPUT_PULLUP);
  pinMode(BUTTON_PIN3, INPUT_PULLUP);
  
  audio.speakerPin=9;
  Serial.begin(9600);
}

Finally, we add the functions of our light and buttons. The light will illuminate if no µSD card is detected. The other buttons are there to pause the song and switch songs. So to start the music you have to press the 'next' or 'previous' button

void loop() {
  if(!SD.begin(SD_ChipSelectPin)){
    digitalWrite(LED_SD, HIGH);
    Serial.println("SD fail");
  return;
  }
  buttonState1 = digitalRead(BUTTON_PIN1);  
  buttonState2 = digitalRead(BUTTON_PIN2);
  buttonState3 = digitalRead(BUTTON_PIN3);
  
  if(buttonState1 == LOW){
    audio.pause();         
  }
 
  else if(buttonState2 == LOW){
    song +=1;
    if( song > 6){
      song = 6;
    }
    audio.play(names[song]);       
  }
  
  else if(buttonState3 == LOW){
    song -=1;
    if( song > 1){
      song = 1;
    }
    audio.play(names[song]);          
  }
}

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Mp3 player

The code

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