I have been busy on several projects at once, and havn't checked on playing audio files from an SD card for a while.
I made my project that announces a message, controlled from another arduino chip that does the video side, using the wavehc library, which I copied and pasted , but never really understood.
I had one problem when trying to queue the messages ( done on the video chip ) but I got round that by removing the "if playing STOP" part.
I did have hassles with some makes of SD card ( 2Gb) not working, but I used 4 of the same Kingston cards that seemed OK.
2 of these units have had the card fail, one which is a real failure, and the other I can still see the wav files on it, but it doesn't work.
I remember there was some talk about it being fussy with which cards are used.
Will the new SD library overcome this problem ? I am using the 328 chips programmed from a Duemilanove board.
My existing code for the sound chip is below, would it be easy to update?
#include <ArduinoPins.h>
#include <FatReader.h>
#include <FatStructs.h>
#include <mcpDac.h>
#include <SdInfo.h>
#include <SdReader.h>
#include <WaveHC.h>
#include <Wavemainpage.h>
#include <WavePinDefs.h>
#include <WaveUtil.h>
#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
// testing bcd conversion
int talkingPin = 19; // high while audio playing to video chip to keep number on.
int aPin =18; //define pin numbers for bcd inputs from dequeued HT12D
int bPin =17;
int cPin =15;
int dPin =16;
int vtPin = 14; // define pin numbers for valid transmission input from HT12D
int track ; // define audio track number
int bcda ; // define bcd digitalreads for BCD/dec conversion
int bcdb;
int bcdc;
int bcdd;
int valid ; // to be set high if vt in
// 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);
while(1);
}
void setup() {
// set up serial port
Serial.begin(9600);
pinMode (aPin,INPUT); //bcd inputs from HT12
pinMode (bPin,INPUT);
pinMode (cPin,INPUT);
pinMode (dPin,INPUT);
pinMode (vtPin,INPUT); // valid trasnmission input
pinMode (talkingPin,OUTPUT); // display enable to vga chip
putstring_nl("WaveHC with 9 inputs");
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() {
bcda = digitalRead ( aPin ); // read the state of the video micro dequeued "decode" data outputs
bcdb = digitalRead ( bPin );
bcdc = digitalRead ( cPin );
bcdd = digitalRead ( dPin );
valid = digitalRead ( vtPin ); // check if signal received, set valid high
if (bcda==1 && bcdb==0 && bcdc == 0 && bcdd == 0 ) { //bcd / dec decoding to give track number to be read
track = 1;
} // convert bcd to dec
if (bcda==0 && bcdb==1 && bcdc == 0 && bcdd == 0 ) {
track = 2;
}
if (bcda==1 && bcdb==1 && bcdc == 0 && bcdd == 0 ) {
track = 3;
}
if (bcda==0 && bcdb==0 && bcdc == 1 && bcdd == 0 ) {
track = 4;
}
if (bcda==1 && bcdb==0 && bcdc == 1 && bcdd == 0 ) {
track = 5;
}
if (bcda==0 && bcdb==1 && bcdc == 1 && bcdd == 0 ) {
track = 6;
}
if (bcda==1 && bcdb==1 && bcdc == 1 && bcdd == 0 ) {
track = 7;
}
if (bcda==0 && bcdb==0 && bcdc == 0 && bcdd == 1 ) {
track = 8;
}
if (bcda==1 && bcdb==0 && bcdc == 0 && bcdd == 1 ) {
track = 9;
}
//Serial.print ( track);
//Serial.print( bcda);
// Serial.print ( bcdb);
// Serial.print ( bcdc);
// Serial.print( bcdd);
// Serial.println ( valid);
//putstring("."); // uncomment this to see if the loop isnt running
if (track==1) {
playcomplete("doornum1.wav");
}
else;
if (track==2) {
playcomplete("doornum2.wav");
}
else;
if (track==3) {
playcomplete("doornum3.wav");
}
else;
if (track==4) {
playcomplete("doornum4.wav");
}
else;
if (track==5) {
playcomplete("doornum5.wav");
}
else;
if (track==6) {
playcomplete("doornum6.wav");
}
else;
if (track==7) {
playcomplete("doornum7.wav");
}
else;
if (track==8) {
playcomplete("doornum8.wav");
}
else;
if (track==9) {
playcomplete("doornum9.wav");
}
}
// 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);
if (wave.isplaying) {// set display enable high to vga chip
digitalWrite(talkingPin, LOW);
}
else
{
digitalWrite(talkingPin, HIGH);
}
while (wave.isplaying) {
}
// 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;
}
if (valid == 1){
// ok time to play! start playback
wave.play();
}
}
