HELLdu.ino

#include <WaveHC.h>
#include <WaveUtil.h>

#define FSRPin 0 // Pin Num for FSR
#define HS1Pin 1 // Pin Num for HS1
#define HS2Pin 2 // Pin Num for HS2
#define PMPin 3 // Pin Num for PM

#define ledFSR 11  // Pin for LED detect FSR status 
#define ledHS1 12  // Pin for LED detect HS1 status
#define ledHS2 13  // Pin for LED detect HS2 status

#define MaxSoundFiles 8 // max number of Sound files
#define error(msg) error_P(PSTR(msg))

SdReader card;    // This object holds the information for the card
FatVolume vol;    // This holds the information for the partition on the card
FatReader root;   // This holds the information for the volumes root directory
FatReader file;   // This object represent the WAV file for a pi digit or period
WaveHC wave;      // This is the only wave (audio) object, since we will only play one at a time

// put pi in flash memory
const char sound_file[] PROGMEM = "123456789";

uint16_t HS_threshold = 600;
uint16_t FSR_ref = 0; //Holl Sensors' refernce
unsigned digit = 0;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  // setup Digital Output
  pinMode(ledFSR, OUTPUT);
  pinMode(ledHS1, OUTPUT);
  pinMode(ledHS2, OUTPUT);
  
  PgmPrintln("Pi speaker");

  if (!card.init()) {
    error("Card init. failed!");
  }
  if (!vol.init(card)) {
    error("No partition!");
  }
  if (!root.openRoot(vol)) {
    error("Couldn't open dir");
  }

  PgmPrintln("Files found:");
  root.ls();

}

void loop() {
  uint16_t FSR_value = analogRead(0);
  uint16_t HS1_value = analogRead(1);
  uint16_t HS2_value = analogRead(2);
  uint16_t PM_value = analogRead(3);


  boolean FSR_flag = false;
  if (FSR_value >= PM_value) {
    FSR_flag = true;
  } else {
    FSR_flag = false;
  }
  boolean HS1_flag = false;
  if (HS1_value >= HS_threshold) {
    HS1_flag = true;
  } else {
    HS1_flag = false;
  }
  boolean HS2_flag = false;
  if (HS2_value >= HS_threshold) {
    HS2_flag = true;
  } else {
    HS2_flag = false;
  }
  boolean HS_flag = false;
  if (HS1_flag == true || HS2_flag == true ) {
    HS_flag = true;
  } else {
    HS_flag = false;
  }
  Serial.println(FSR_flag);
  Serial.println(HS_flag);
  if (HS_flag == true && FSR_flag == true) {
    Serial.println("SOUND TRIGGER");
    playsound();
  }
  delay(10);
}

void playsound(void) {

  uint8_t soundFileNum = random(MaxSoundFiles); // randomize sound file's Number

  while (soundFileNum == FSR_ref) {
    soundFileNum = random(MaxSoundFiles);
  }
  FSR_ref = soundFileNum;

  char c = pgm_read_byte(&sound_file[soundFileNum]);

  if (c == 0) {
    digit = 0;
    Serial.println();
    return;
  }
  Serial.print("\n\a");
  Serial.write("playing   ");
  Serial.write(c);
  Serial.write(".wav");
  Serial.print("\n\a");

  speakfile(c);

}


/////////////////////////////////// HELPERS

char filename[13];
void speakfile(char c) {
  uint8_t i = 0;

  // copy flash string for 'period' to filename
  strcpy_P(filename, PSTR("0.WAV"));

  if ('0' <= c && c <= '9') {
    // digit - change 'P' to digit
    filename[0] = c;
    i = 1;
  }
  playcomplete(filename);
}
/*
   print error message and halt
*/
void error_P(const char *str) {
  PgmPrint("Error: ");
  SerialPrint_P(str);
  sdErrorCheck();
  while (1);
}
/*
   print error message and halt if SD I/O error
*/
void sdErrorCheck(void) {
  if (!card.errorCode()) return;
  PgmPrint("\r\nSD I/O error: ");
  Serial.print(card.errorCode(), HEX);
  PgmPrint(", ");
  Serial.println(card.errorData(), HEX);
  while (1);
}
/*
   Play a file and wait for it to complete
*/
void playcomplete(char *name) {
  playfile(name);
  while (wave.isplaying);

  // see if an error occurred while playing
  sdErrorCheck();
}
/*
   Open and start playing a WAV file
*/
void playfile(char *name) {
  if (wave.isplaying) {// already playing something, so stop it!
    wave.stop(); // stop it
  }
  if (!file.open(root, name)) {
    PgmPrint("Couldn't open file ");
    Serial.print(name);
    return;
  }
  if (!wave.create(file)) {
    PgmPrintln("Not a valid WAV");
    return;
  }
  // ok time to play!
  wave.play();
}