Eyeglass Project_Student

//import libraries downloaded from Sparkfun at https://github.com/sparkfun/LilyPad_MP3_Player
// 3.3V, 8Mhz, Pro-Mini

#include <SPI.h>              // To talk to the SD card and MP3 chip
#include <SdFat.h>            // SD card file system
#include <SFEMP3Shield.h>     // MP3 decoder chip

//DEFINE ports on MP3 Board
#define T1 A0       // Trig1 analog port
#define T2 A4       // Trig2 analog port
#define T3 A5       // Trig3 analog port

#define MP3_ENABLE A2  // Amp enable + MIDI/MP3 mode select
#define SD_SEL 9       // Chip Select for SD card
#define MIN_VOL 255    // Define volume settings for MP3 Board
#define MAX_VOL 0

#define REFERENCE_VOLTAGE 3.3   // Set source battery voltage for MP3 board
#define SAMPLE_WINDOW 250       // Sampling time for sensors (ms)
#define LIGHT_THOLD 2.0         // Threshold for light sensor
#define SOUND_THOLD 1.2         // Threshold for sound sensor

//Create variables
int T1_sample;      // Store sensor value from Trig1
int T2_sample;      // Store sensor value from Trig2
int T3_output;      // Store value to write to Trig3

byte result;                      // Store results from calls to MP3 methods, 0-255 values only
char filename1[]="track001.mp3";  //filename to play, must be 8.3 format only!!

// Create objects
SFEMP3Shield MP3player;
SdFat sd;

void setup() {
  // Start serial monitor
  Serial.begin(9600);

  // Set port input and output
  pinMode(T1,INPUT);   // Sensor #1
  pinMode(T2,INPUT);   // Sensor #2
  pinMode(T3,OUTPUT);  // LED

  // Initialize SD Card and display result
  result = sd.begin(SD_SEL,SPI_HALF_SPEED);
  Serial.println("SD Card Initialized (1 for success) = "+String(result));

  // Initialize MP3 board and LED in this order
  pinMode(MP3_ENABLE,OUTPUT);            //Enable MP3 mode
  digitalWrite(MP3_ENABLE,LOW);          //Turn off amplifier
  result = MP3player.begin();            //Start board
  digitalWrite(MP3_ENABLE,HIGH);         //Turn on amplifier
  delay(2);
  Serial.println("MP3 Enable (0 or 6 for success) = "+String(result));

} // end setup

void loop() {
  int sensor1_Max = 0.0;          // Define maximum signal as 0 to start
  int sensor1_Min = 1024.0;       // Define minimum signal as 1024 to start
  int sensor2_Max = 0.0;          // Define maximum signal as 0 to start
  int sensor2_Min = 1024.0;       // Define minimum signal as 1024 to start

  // Sample sensor1 and sensor 2
  unsigned long start= millis();         // Set start of sample window

  while (millis() - start < SAMPLE_WINDOW) {
   T1_sample = analogRead(T1);
   T2_sample = analogRead(T2);

        if (T1_sample > sensor1_Max)
          {
            sensor1_Max = T1_sample;          // save just the max levels
          }
        else if (T1_sample < sensor1_Min)
          {
            sensor1_Min = T1_sample;          // save just the min levels
          }


         if (T2_sample > sensor2_Max)
          {
            sensor2_Max = T2_sample;          // save just the max levels
          }
        else if (T2_sample < sensor2_Min)
          {
            sensor2_Min = T2_sample;          // save just the min levels
          }
  } // end while

  // Print Max volts detected from sensor 1
  float sensor1_max_volt = (sensor1_Max * REFERENCE_VOLTAGE)/1024;
  Serial.println("Sensor1 Volts Reading = "+String(sensor1_max_volt));

  // Print Peak voltage detected from sensor 2
  float sensor2_peak_volt = (sensor2_Max - sensor2_Min) * REFERENCE_VOLTAGE/1024;
  Serial.println("Sensor2 Peak Volts Reading = "+String(sensor2_peak_volt));

  delay(250);
} // end loop