The New Hobbyist

/*
  Motion activated "Attack Creeper"
 
Detects motion using a PIR sensor. When motion is detected plays two wave files and activates RC remote.
 
Code examples edited and reworked from http://wwww.ladyada.net
 
TheNewHobbyist 2011 <http://www.thenewhobbyist.com>
 
 */
 
#include <FatReader.h>
#include <SdReader.h>
#include <avr/pgmspace.h>
#include "WaveUtil.h"
#include "WaveHC.h"
 
 
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 filesystem on the card
FatReader f;      // This holds the information for the file we're play
 
WaveHC wave;      // This is the only wave (audio) object, since we will only play one at a time
 
  // for PIR
  int ledPin = 13;                // choose the pin for the LED
  int inputPin = 6;               // choose the input pin (for PIR sensor)
  int pirState = LOW;             // we start, assuming no motion detected
  int val = 0;                    // variable for reading the pin status
 
 
#define DEBOUNCE 5  // button debouncer
 
// this handy function will return the number of bytes currently free in RAM, great for debugging!   
int freeRam(void)
{
  extern int  __bss_end; 
  extern int  *__brkval; 
  int free_memory; 
  if((int)__brkval == 0) {
    free_memory = ((int)&free_memory) - ((int)&__bss_end); 
  }
  else {
    free_memory = ((int)&free_memory) - ((int)__brkval); 
  }
  return free_memory; 
} 
 
void sdErrorCheck(void)
{
  if (!card.errorCode()) return;
  putstring("nrSD I/O error: ");
  Serial.print(card.errorCode(), HEX);
  putstring(", ");
  Serial.println(card.errorData(), HEX);
  while(1);
}
 
void setup() {
  byte i;
 
  // set up serial port
  Serial.begin(9600);
  putstring_nl("WaveHC with ");
  putstring_nl("buttons");
 
  putstring("Free RAM: ");       // This can help with debugging, running out of RAM is bad
  Serial.println(freeRam());      // if this is under 150 bytes it may spell trouble!
 
  // Set the output pins for the DAC control. This pins are defined in the library
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, INPUT);
  pinMode(8, OUTPUT);
 
  //  if (!card.init(true)) { //play with 4 MHz spi if 8MHz isn't working for you
  if (!card.init()) {         //play with 8 MHz spi (default faster!)  
    putstring_nl("Card init. failed!");  // Something went wrong, lets print out why
    sdErrorCheck();
    while(1);                            // then 'halt' - do nothing!
  }
 
  // enable optimize read - some cards may timeout. Disable if you're having problems
  card.partialBlockRead(true);
 
// Now we will look for a FAT partition!
  uint8_t part;
  for (part = 0; part < 5; part++) {     // we have up to 5 slots to look in
    if (vol.init(card, part)) 
      break;                             // we found one, lets bail
  }
  if (part == 5) {                       // if we ended up not finding one  :(
    putstring_nl("No valid FAT partition!");
    sdErrorCheck();      // Something went wrong, lets print out why
    while(1);                            // then 'halt' - do nothing!
  }
 
  // Lets tell the user about what we found
  putstring("Using partition ");
  Serial.print(part, DEC);
  putstring(", type is FAT");
  Serial.println(vol.fatType(),DEC);     // FAT16 or FAT32?
 
  // Try to open the root directory
  if (!root.openRoot(vol)) {
    putstring_nl("Can't open root dir!"); // Something went wrong,
    while(1);                             // then 'halt' - do nothing!
  }
 
  // Whew! We got past the tough parts.
  putstring_nl("Ready!");
 
  TCCR2A = 0;
  TCCR2B = 1<<CS22 | 1<<CS21 | 1<<CS20;
 
  //Timer2 Overflow Interrupt Enable
  TIMSK2 |= 1<<TOIE2;
 
}
 
SIGNAL(TIMER2_OVF_vect) {
  check_switches();
}
 
void check_switches()
{
 
}
 
void loop(){
  digitalWrite(8,HIGH);
  val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, HIGH);  // turn LED ON
    if (pirState == LOW) {
      // Oh hey movement!
      Serial.println("Motion detected!");
       // Make scary eyes
       Serial.println("playing");
       // SSSSSSSSS.... That's a nice everything you have
       playcomplete("fuse.wav");
       // Move forward for 1 second
       digitalWrite(8, LOW);
      delay(2000);
       digitalWrite(8, HIGH);    // MOVE
       Serial.println("Move finished");
       // End Movement
       // Explode
       Serial.println("time to explode");
       playcomplete("explode.wav");
       // Go back to sleep
       Serial.println("resetting for next run");
       delay(10000);
 
      // We only want to print on the output change, not state
      pirState = HIGH;
    }
  } else {
    digitalWrite(ledPin, LOW); // turn LED OFF
    if (pirState == HIGH){
      // we have just turned of
      Serial.println("Motion ended!");
 
      // We only want to print on the output change, not state
      pirState = LOW;
    }
  }
}
 
// Plays a full file from beginning to end with no pause.
void playcomplete(char *name) {
  // call our helper to find and play this name
  playfile(name);
  while (wave.isplaying) {
  // do nothing while its playing
  }
  // now its done playing
}
 
void playfile(char *name) {
  // see if the wave object is currently doing something
  if (wave.isplaying) {// already playing something, so stop it!
    wave.stop(); // stop it
  }
  // look in the root directory and open the file
  if (!f.open(root, name)) {
    putstring("Couldn't open file "); Serial.print(name); return;
  }
  // OK read the file and turn it into a wave object
  if (!wave.create(f)) {
    putstring_nl("Not a valid WAV"); return;
  }
 
  // ok time to play! start playback
  wave.play();
}