I used this code which uses an LDR to play a file:
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
uint8_t dirLevel; // indent level for file/dir names (for prettyprinting)
dir_t dirBuf; // buffer for directory reads
WaveHC wave; // This is the only wave (audio) object, since we will only play one at a time
int LDR = 0; // LDR Pin
int val = 0; // variable to store the value coming from the sensor
// Function definitions (we define them here, but the code is below)
void lsR(FatReader &d);
void play(FatReader &dir);
void setup() {
Serial.println(analogRead(0)); // print out value of light sensor on analog pin 0
val = analogRead(LDR); // read the value from the sensor
if ( val > 500 ) play(root);
Serial.begin(9600); // set up Serial library at 9600 bps for debugging
pinMode(LDR, INPUT); // declare the LDR as an INPUT
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());
// 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
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!
}
// 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("Files found:");
dirLevel = 0;
// Print out all of the files in all the directories.
lsR(root);
}
//////////////////////////////////// LOOP
void loop() {
root.rewind();
// play(root);
val = analogRead(LDR); // read the value from the sensor
if ( val > 500 ) play(root);
}
/////////////////////////////////// HELPERS
// 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;
}
/*
* print error message and halt if SD I/O error, great for debugging!
*/
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);
}
/*
* print dir_t name field. The output is 8.3 format, so like SOUND.WAV or FILENAME.DAT
*/
void printName(dir_t &dir)
{
for (uint8_t i = 0; i < 11; i++) { // 8.3 format has 8+3 = 11 letters in it
if (dir.name[i] == ' ')
continue; // dont print any spaces in the name
if (i == 8)
Serial.print('.'); // after the 8th letter, place a dot
Serial.print(dir.name[i]); // print the n'th digit
}
if (DIR_IS_SUBDIR(dir))
Serial.print('/'); // directories get a / at the end
}
/*
* list recursively - possible stack overflow if subdirectories too nested
*/
void lsR(FatReader &d)
{
int8_t r; // indicates the level of recursion
while ((r = d.readDir(dirBuf)) > 0) { // read the next file in the directory
// skip subdirs . and ..
if (dirBuf.name[0] == '.')
continue;
for (uint8_t i = 0; i < dirLevel; i++)
Serial.print(' '); // this is for prettyprinting, put spaces in front
printName(dirBuf); // print the name of the file we just found
Serial.println(); // and a new line
if (DIR_IS_SUBDIR(dirBuf)) { // we will recurse on any direcory
FatReader s; // make a new directory object to hold information
dirLevel += 2; // indent 2 spaces for future prints
if (s.open(vol, dirBuf))
lsR(s); // list all the files in this directory now!
dirLevel -=2; // remove the extra indentation
}
}
sdErrorCheck(); // are we doign OK?
}
/*
* 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 . and .. directories
if (dirBuf.name[0] == '.')
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
Serial.println("file.open failed"); // something went wrong :(
while(1); // halt
}
if (file.isDir()) { // check if we opened a new directory
putstring("Subdir: ");
printName(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 "); printName(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!
while (wave.isplaying) { // playing occurs in interrupts, so we print dots in realtime
putstring(".");
delay(100);
}
sdErrorCheck(); // everything OK?
// if (wave.errors)Serial.println(wave.errors); // wave decoding errors
}
}
}
}I added these bottom two lines at the top:
int LDR = 0; // LDR Pin
int val = 0; // variable to store the value coming from the sensor
int LDR2 = 1; // LDR Pin
int val2 = 1; // variable to store the value coming from the sensor
As well as these few lines:
Serial.println(analogRead(1)); // print out value of light sensor on analog pin 0
val = analogRead(LDR2); // read the value from the sensor
if ( val > 100 ) wave.stop();
To this section:
Code: Select all
void setup() {
Serial.println(analogRead(0)); // print out value of light sensor on analog pin 0
val = analogRead(LDR); // read the value from the sensor
if ( val > 100 ) play(root);
Serial.println(analogRead(1)); // print out value of light sensor on analog pin 0
val = analogRead(LDR2); // read the value from the sensor
if ( val > 100 ) wave.stop();Code: Select all
void loop() {
root.rewind();
// play(root);
val = analogRead(LDR); // read the value from the sensor
if ( val > 500 ) play(root);
}Code: Select all
void loop() {
root.rewind();
// play(root);
val = analogRead(LDR); // read the value from the sensor
if ( val < 100 ) play(root);
val2 = analogRead(LDR2);
if ( val2 < 100) wave.stop(); // stop it;
}Is there something obvious I am missing out?
I feel like I'm soo close lol
