I have the Wave Shield 1.1 working with the wavehc20110508 enhancements and the example code below. Thanks for the updates. Now I'm trying to find code and wiring suggestions to make a piezo mic trigger the playing of sound files.
Code: Select all
/*
* This example plays every .WAV file it finds on the SD card in a loop
*/
#include "WaveHC.h"
#include "WaveUtil.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 volumes root directory
WaveHC wave; // This is the only wave (audio) object, since we will only play one at a time
uint8_t dirLevel; // indent level for file/dir names (for prettyprinting)
dir_t dirBuf; // buffer for directory reads
/*
* Define macro to put error messages in flash memory
*/
#define error(msg) error_P(PSTR(msg))
// Function definitions (we define them here, but the code is below)
void play(FatReader &dir);
//////////////////////////////////// SETUP
void setup()
{
Serial.begin(9600); // set up Serial library at 9600 bps for debugging
putstring_nl("\nWave test!"); // say we woke up!
putstring("Free RAM: "); // This can help with debugging, running out of RAM is bad
Serial.println(FreeRam());
// 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!)
error("Card init. failed!"); // Something went wrong, lets print out why
}
// 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 :(
error("No valid FAT partition!"); // Something went wrong, lets print out why
}
// 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)) {
error("Can't open root dir!"); // Something went wrong,
}
// Whew! We got past the tough parts.
putstring_nl("Files found (* = fragmented):");
// Print out all of the files in all the directories.
root.ls(LS_R | LS_FLAG_FRAGMENTED);
}
//////////////////////////////////// LOOP
void loop()
{
root.rewind();
play(root);
}
/////////////////////////////////// HELPERS
/*
* 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, great for debugging!
*/
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 recursively - possible stack overflow if subdirectories too nested
*/
void play(FatReader &dir)
{
FatReader file;
while (dir.readDir(dirBuf) > 0) { // Read every file in the directory one at a time
// Skip it if not a subdirectory and not a .WAV file
if (!DIR_IS_SUBDIR(dirBuf)
&& strncmp_P((char *)&dirBuf.name[8], PSTR("WAV"), 3)) {
continue;
}
Serial.println(); // clear out a new line
for (uint8_t i = 0; i < dirLevel; i++) {
Serial.print(' '); // this is for prettyprinting, put spaces in front
}
if (!file.open(vol, dirBuf)) { // open the file in the directory
error("file.open failed"); // something went wrong
}
if (file.isDir()) { // check if we opened a new directory
putstring("Subdir: ");
printEntryName(dirBuf);
dirLevel += 2; // add more spaces
// play files in subdirectory
play(file); // recursive!
dirLevel -= 2;
}
else {
// Aha! we found a file that isnt a directory
putstring("Playing ");
printEntryName(dirBuf); // print it out
if (!wave.create(file)) { // Figure out, is it a WAV proper?
putstring(" Not a valid WAV"); // ok skip it
} else {
Serial.println(); // Hooray it IS a WAV proper!
wave.play(); // make some noise!
uint8_t n = 0;
while (wave.isplaying) {// playing occurs in interrupts, so we print dots in realtime
putstring(".");
if (!(++n % 32))Serial.println();
delay(100);
}
sdErrorCheck(); // everything OK?
// if (wave.errors)Serial.println(wave.errors); // wave decoding errors
}
}
}
}
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/* piezo sketch
* lights and LED when the Piezo is tapped
*/
const int sensorPin = 0; // the analog pin connected to the sensor
const int ledPin = 13; // pin connected to LED
const int THRESHOLD = 100;
void setup()
{
pinMode(ledPin, OUTPUT);
}
void loop()
{
int val = analogRead(sensorPin);
if (val >= THRESHOLD)
{
digitalWrite(ledPin, HIGH);
delay(100); // to make the LED visible
}
else
digitalWrite(ledPin, LOW);
}
So now the task is to get the piezo to play sound files from the Wave Shield and wire it so I don't fry the Arduino pin
with the piezo. Having an LED to track the triggering would be nice. Look forward to your responses. Thanks.