WaveHc Syntax: Where to start?
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WaveHc Syntax: Where to start?
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.
- adafruit_support_bill
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Re: WaveHc Syntax: Where to start?
That is covered in the tutorial here: http://www.ladyada.net/make/waveshield/ ... play6.html
Also, check out the many example sketches.
Also, check out the many example sketches.
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Re: WaveHc Syntax: Where to start?
So will playcomplete only play the track once?
- adafruit_support_bill
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Re: WaveHc Syntax: Where to start?
@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.
Nothing is going to go up in smoke if you get it wrong (well.... maybe on a motor shield )
Nothing is going to go up in smoke if you get it wrong (well.... maybe on a motor shield )
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Re: WaveHc Syntax: Where to start?
Ok, I'll try it this afternoon.
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Re: WaveHc Syntax: Where to start?
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();
}
- adafruit_support_bill
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Re: WaveHc Syntax: Where to start?
Where do you want it to stop?
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- Joined: Sat Jan 07, 2012 6:56 pm
Re: WaveHc Syntax: Where to start?
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?
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- Joined: Sat Nov 10, 2007 12:59 am
Re: WaveHc Syntax: Where to start?
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
note the while loop with the comment // do nothing while its playing
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- Posts: 39
- Joined: Sat Jan 07, 2012 6:56 pm
Re: WaveHc Syntax: Where to start?
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();
}
- adafruit_support_bill
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- Joined: Sat Feb 07, 2009 10:11 am
Re: WaveHc Syntax: Where to start?
After the first time through the loop, 'once' is equal to 1 and you call wave.stop().
-
- Posts: 39
- Joined: Sat Jan 07, 2012 6:56 pm
Re: WaveHc Syntax: Where to start?
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();
}
Please be positive and constructive with your questions and comments.