WaveHc Syntax: Where to start?

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AKSoapy29
 
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WaveHc Syntax: Where to start?

Post by AKSoapy29 »

I am using the WaveHc library for my Wave Shield, and I was wondering how to use it. I was wondering what the code would be like for a button, where I press the button, and it would play a specific sound file. If I can understand that, then I'm sure I can move onto my bigger project.

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adafruit_support_bill
 
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Re: WaveHc Syntax: Where to start?

Post by adafruit_support_bill »

That is covered in the tutorial here: http://www.ladyada.net/make/waveshield/ ... play6.html
Also, check out the many example sketches.

AKSoapy29
 
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Re: WaveHc Syntax: Where to start?

Post by AKSoapy29 »

So will playcomplete only play the track once?

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adafruit_support_bill
 
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Re: WaveHc Syntax: Where to start?

Post by adafruit_support_bill »

@AKSoapy29: The best way to learn this stuff is to dive in headfirst. Look through the code. Try it on your shield and see if it does what you expect it to do. :D

Nothing is going to go up in smoke if you get it wrong (well.... maybe on a motor shield :wink: )

AKSoapy29
 
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Re: WaveHc Syntax: Where to start?

Post by AKSoapy29 »

Ok, I'll try it this afternoon.

AKSoapy29
 
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Re: WaveHc Syntax: Where to start?

Post by AKSoapy29 »

I got a potentiometer to work, were if it is past a certain point, it will play the music, but how do I stop it? Here's my code.

Code: Select all

#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

#define DEBOUNCE 100  // button debouncer

int pos;

void sdErrorCheck(void)
{
  if (!card.errorCode()) return;
  putstring("\n\rSD I/O error: ");
  Serial.print(card.errorCode(), HEX);
  putstring(", ");
  Serial.println(card.errorData(), HEX);
  while(1);
}

void setup() {
  // set up serial port
  Serial.begin(9600);
  //putstring_nl("WaveHC with 6 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);
 
  // pin13 LED
  pinMode(13, OUTPUT);
 
  // enable pull-up resistors on switch pins (analog inputs)
  /*digitalWrite(14, HIGH);
  digitalWrite(15, HIGH);
  digitalWrite(16, HIGH);
  digitalWrite(17, HIGH);
  digitalWrite(18, HIGH);
  digitalWrite(19, HIGH);*/
 
  //  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!");
}

void loop() {
  pos=analogRead(A0);
  if(pos>=500){
      playcomplete("piano.WAV");
      //playfile("piano.wav");
  }else{
    wave.stop();
  }
  delay(1);
}

// 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();
}

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adafruit_support_bill
 
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Re: WaveHc Syntax: Where to start?

Post by adafruit_support_bill »

Where do you want it to stop?

AKSoapy29
 
Posts: 39
Joined: Sat Jan 07, 2012 6:56 pm

Re: WaveHc Syntax: Where to start?

Post by AKSoapy29 »

There's an if statement in the loop, and in the else I put wave.stop();. Well that doesn't stop it, so if there a different type of play, or is there a stop?

mtbf0
 
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Re: WaveHc Syntax: Where to start?

Post by mtbf0 »

playcomplete() contains a loop that waits until the file has completed before returning. if you wish to be able to interrupt playing use playfile() instead.

note the while loop with the comment // do nothing while its playing

AKSoapy29
 
Posts: 39
Joined: Sat Jan 07, 2012 6:56 pm

Re: WaveHc Syntax: Where to start?

Post by AKSoapy29 »

playfile isn't doing anything. The filename is piano.WAV, and I do playfile("piano.WAV");, and it doesn't play anything. Here is my code:

Code: Select all

#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

#define DEBOUNCE 100  // button debouncer

int pos;
int once=0;

void sdErrorCheck(void)
{
  if (!card.errorCode()) return;
  putstring("\n\rSD I/O error: ");
  Serial.print(card.errorCode(), HEX);
  putstring(", ");
  Serial.println(card.errorData(), HEX);
  while(1);
}

void setup() {
  // set up serial port
  Serial.begin(9600);
  //putstring_nl("WaveHC with 6 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);

  // pin13 LED
  pinMode(13, OUTPUT);

  // enable pull-up resistors on switch pins (analog inputs)
  /*digitalWrite(14, HIGH);
  digitalWrite(15, HIGH);
  digitalWrite(16, HIGH);
  digitalWrite(17, HIGH);
  digitalWrite(18, HIGH);
  digitalWrite(19, HIGH);*/

  //  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!");
}

void loop() {
  pos=analogRead(A0);
  Serial.println(pos);
  if(pos>=500&&once!=1){
    once=1;
    playfile("piano.WAV");
  }else{
    once=0;
    wave.stop();
  }
  /*
  if(pos>=500){
    Serial.println("Correct");
      //playcomplete("piano.WAV");
      playfile("piano.WAV");
  }else{
    wave.stop();
  }
  */
  delay(10);
}

// 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();
}

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adafruit_support_bill
 
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Joined: Sat Feb 07, 2009 10:11 am

Re: WaveHc Syntax: Where to start?

Post by adafruit_support_bill »

After the first time through the loop, 'once' is equal to 1 and you call wave.stop().

AKSoapy29
 
Posts: 39
Joined: Sat Jan 07, 2012 6:56 pm

Re: WaveHc Syntax: Where to start?

Post by AKSoapy29 »

Ok. This works:

Code: Select all

  if(pos>=500&&once==0){
    once=1;
    playfile("piano.WAV");
  }
  else if(pos>=500&&once!=0){
  }else{
    once=0;
    wave.stop();
  }

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