HELL_test4.ino

/*
 * HELL_STAMP SOUND PLAY 
 * 
 */
#include <WaveHC.h>
#include <WaveUtil.h>

// put pi in flash memory
const char sound_file[] PROGMEM = "12345789";

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


#define FSRPin 0 // Pin Num for FSR
#define FSR_threshold 1000 // threshold for FSR
#define HollSens_threshold 1000 // threshold for FSR
#define MaxSoundFiles 6 // max number of Sound files
uint8_t FSR_ref = 0; // sound number reference
boolean FSR_flag = 0; //FSR's flag


#define HollSensPin1 1 // Pin Num for HolleSensor1
#define HollSensPin2 2 // Pin Num for HolleSensor2
#define ledPin 13  // Pin for LED 
boolean Holl_flag = 0; //Holl Sensors' flag
boolean Holl_ref = 0; //Holl Sensors' refernce

/*
 * Define macro to put error messages in flash memory
 */
#define error(msg) error_P(PSTR(msg))

//////////////////////////////////// SETUP

void setup() {
  //set up LED pin to output
  pinMode(ledPin, OUTPUT);
  // set up Serial library at 9600 bps
  Serial.begin(9600);

  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();
}

/////////////////////////////////// LOOP

unsigned digit = 0;

void loop() {

  //FSR Read
  uint32_t FSR_value = analogRead(FSRPin); 

  if (FSR_value <= FSR_threshold) {
    FSR_flag = 1;
  }
  else {
    FSR_flag = 0;
  }

  //Hall Sensor Read
  uint16_t HS1_value = analogRead(HollSensPin1); 
  uint16_t HS2_value = analogRead(HollSensPin2); 

  //Hall Sensors Judge
  if (HS1_value > HollSens_threshold || HS2_value > HollSens_threshold) {
    Holl_flag = 1; 
    digitalWrite(ledPin, HIGH);
  } 
  else {
    Holl_flag = 0; 
    digitalWrite(ledPin, LOW);
  }


  // Holl_flag debuging
  if (Holl_ref != Holl_flag){
    if(Holl_flag == 1){
      Serial.println("Holl_flag = HIGH");
    }
    else {
      Serial.println("Holl_flag = LOW");
    }
  } 

   Holl_ref = Holl_flag;

  //Triger of playing a sound file
  if (FSR_flag == 1 && Holl_flag == 1) {
    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();
}