I am working on a project and am admittedly novice to arduino programming and have run out of ideas with a little problem I am having.
I am trying to interface my arduino and waveshield with some equipment in a museum I work for. They used to use crestron processors to communicate with a BANNED player via RS232 then play a track on the BANNED. The BANNED players have since stopped working and I would like to replace these with Arduinos to cut down on moving parts.
The commands that the processor issues to the BANNED player are:
"?C" What track are you currently playing? It expects a reply of two digits with a carriage return
CHXXSL play this chapter where XX is the chapter number. It expects a reply of an R with a carriage return
I am trying to get the arduino to reply with "01" to when it receives "?" over the serial port and play track T1.WAV when it receives "1" etc.
The problem I am having is that the arduino will only play T6.WAV correctly, It plays when it receives the command and restarts when I send the command again. It will do it for no other tracks. I think it probably has something to do with DEC to ASCII or however the arduino reads the command and the command for number 6 just happens to work.
Any ideas? Thanks for any help you can give.
Geoff
Here is the code I am using that only works properly for playing T6.WAV:
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 incomingByte = 0;
// 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(4800);
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!
// 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() {
//putstring("."); // uncomment this to see if the loop isnt running
{
if (Serial.available() > 0) {
incomingByte = Serial.read();
if (incomingByte == 63)
Serial.println('01');
if (incomingByte == '1')
playfile("T1.WAV");
if (incomingByte == '2')
playfile("T2.WAV");
if (incomingByte == '3')
playfile("T3.WAV");
if (incomingByte == '4')
playfile("T4.WAV");
if (incomingByte == '5')
playfile("T5.WAV");
if (incomingByte == '6')
playfile("T6.WAV");
}
}
Serial.flush();
}
// 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();
Serial.print('R');
}