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1  Using Arduino / Audio / Re: Adafruit WaveShield + PIR SENSOR on: September 24, 2012, 02:46:40 pm
I just found my solution, the code above works well if I comment this line :

  // enable optimize read - some cards may timeout. Disable if you're having problems
 // card.partialBlockRead(true);

2  Using Arduino / Audio / Adafruit WaveShield + PIR SENSOR on: September 23, 2012, 02:10:33 pm

I'm trying to use Adafruit WaveShield with a PIR sensor (what to generate an alarm when a motion is detected).

The code below is unfortunatly not working. smiley-confuse

Without the PIR sensor (and code updated), the .wav file keep playing well. The PIR sensor is also working well with a buzzer.

Can a helpfull mind check the code below and see what's wrong ?

I'm using an Arduino Uno.

#include <FatReader.h>
#include <SdReader.h>
#include <avr/pgmspace.h>
#include "WaveUtil.h"
#include "WaveHC.h"

int ledPin        = 13;  // on board LED
int inputPin      = 12;  // input pin for the PIR sensor
int pirStatus     = LOW; // set to LOW (no motion detected)
int pirValue      = 0;   // variable for reading inputPin status

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

// 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("\n\rSD I/O error: ");
  Serial.print(card.errorCode(), HEX);
  putstring(", ");
  Serial.println(card.errorData(), HEX);

void setup() {
  // set up serial port
  pinMode(ledPin, OUTPUT);   // set pinMode of the onboard LED to OUTPUT
  pinMode(inputPin, INPUT);  // set PIR inputPin and listen to it as INPUT

  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);
  //  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
    while(1);                            // then 'halt' - do nothing!
  // enable optimize read - some cards may timeout. Disable if you're having problems
// 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.


//////////////////////////////////// LOOP//START:main_loop
void loop() {
  pirValue = digitalRead(inputPin); // poll the value of the PIR
  if (pirValue == HIGH) {          // If motion is detected
    digitalWrite(ledPin, HIGH);  // turn the onboard LED on
    if (pirStatus == LOW) { // Trigger motion
      Serial.println("Motion detected");

      delay(1000);          // wait a second

      pirStatus = HIGH;     // set the pirStatus flag to HIGH to stop
                            // repeating motion
   else {
    digitalWrite(ledPin, LOW); // turn the onboard LED off
    if (pirStatus == HIGH){
      Serial.println("No motion");
      pirStatus = LOW;      // set the pirStatus flag to LOW to
                            // prepare it for a motion event

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

// Plays a full file from beginning to end with no pause.
void playcomplete(char *name) {
  // call our helper to find and play this 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 (!, name)) {
    putstring("Couldn't open file ");
  // 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;

Thanks for your help !!
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