Hi, I am working on a project using a WavTrigger board with Arduino.
The project should do the follwoing:
When a button is pressed a audio file should be playing and continuing playing until finished. while the audio is playing an additional pressing of the button will not effect it.
A led should be ON to indicate that the audio file is playing. The led should go Off the moment the audio file is finished.
Total of 15 buttons and 15 LEDS.
Another thing I would like to do is to count how many tracks are playing in any given time and to change the volume of each track accordingly.
So if only 1 track is playing it will play at unity volume, if another track is playing the new track will play at half of volume and also the track that is already playing will fade over a few seconds (lets say 5 seconds ) to also half of the volume.
If another track will join each of the tracks will play at third of the volume etc etc.
so basically what I try to achieve is that no matter how much track are playing the total volume of all tracks will be unity so will not have any distortion.
I try to achieve it in the code I am sharing down below but without a success.
Regarding the electronics. Assuming a moment all 15 track are playing and therfore a 15 LEDs are ON - can I drive them all from Arduino Mega?
Is it better to use two multiplexer to read the button states and to output the LED states? is that possible?
So What am I asking is help with the code I have (That was used with Arduino Mega)
and to ask if you think I should use the Mega or is better to use 2 multiplexer?
Any other recommendation?
Thanks for Any help!
Code I used in the past:
#include <wavTrigger.h>
/* Arduino Mega Serial port to use: Serial Port 3:
Pin 14: TX
Pin 15: RX
*/
// Buttons //
const int buttonPins[] = {2,3,4,5,6,7,8,9,10,11,12,16,17,18,19,68,69,22,23,24,25,26,27,28}; //array of buttons pins
const int numOfButtons = (sizeof(buttonPins) / sizeof(buttonPins[0])); // size of push buttons
// Leds //
const int ledPins[] ={30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53}; // array of leds pins
const int numOfLeds = (sizeof(ledPins) / sizeof(ledPins[0])); // size of Leds
// Track Lengths //
// formula for milliseconds = (minutes * 60 + seconds) * 1000 = milliseconds //
const unsigned long trackLength[] = {19000,66000,75000,104000,29000,49000,49000,107000,52000,97000,35000,57000,157000,82000,86000,104000,39000,37000,81000,103000,45000,96000,30000,115000};
// array to store the time when button is pressed //
unsigned long timeButtonPressed[numOfButtons] = {0};
//for first run code //
bool firstRun[numOfButtons] = {0};
//for accurate fading track //
bool preButtonState[numOfButtons] = {0};
bool buttonState[numOfButtons] = {0};
// to count how many track are currently playing //
int counter = 0;
const int fadeTime = 5000;
// WAV Trigger object //
wavTrigger wTrig;
//track number//
int gNumTracks;
// firmware version//
char gWTrigVersion[VERSION_STRING_LEN];
//------------------------------------------//
void setup() {
// starting a commuincation with the serial port //
Serial.begin(9600);
// setting up the digital pins for the buttons to be an input //
for (int i = 0; i < numOfButtons; i++)
{
pinMode(buttonPins[i], INPUT);
}
// setting up the digital pins for the leds to be an output //
for (int j = 0; j < numOfLeds; j++)
{
pinMode(ledPins[j], OUTPUT);
}
delay(1000);
// WAV Trigger startup at 57600
wTrig.start();
delay(10);
// Send a stop-all command and reset the sample-rate offset, in case we have
// reset while the WAV Trigger was already playing.
wTrig.stopAllTracks();
wTrig.samplerateOffset(0);
// Enable track reporting from the WAV Trigger
wTrig.setReporting(true);
delay(1000);
/* checking bi-directional communication. should be able
to return the version of the board and number of tracks on the SD card.*/
if (wTrig.getVersion(gWTrigVersion, VERSION_STRING_LEN))
{
Serial.print(gWTrigVersion);
Serial.print("\n");
gNumTracks = wTrig.getNumTracks();
Serial.print("Number of tracks = ");
Serial.print(gNumTracks);
Serial.print("\n");
}
else
Serial.print("WAV Trigger response not available\n");
Serial.print("\n");
Serial.print("Num of Buttons: ");
Serial.println(numOfButtons);
Serial.print("\n");
Serial.print("Num of Leds: ");
Serial.println(numOfLeds);
Serial.print("\n");
// print the length of each track //
for (int i = 0;i < numOfButtons; i++)
{
Serial.print("The Length of track number ");
Serial.print(i+1);
Serial.print(" is: ");
Serial.print(trackLength[i]);
Serial.println(" Milliseconds");
}
// set master gain to 0db;
wTrig.masterGain(0);
}
//------ loop ------//
void loop()
{
wTrig.update();
for (int i = 0; i < numOfButtons; i++)
{
if (digitalRead(buttonPins[i]) == HIGH)
{
if(millis() - timeButtonPressed[i] >= trackLength[i] || firstRun[i] == 0)
{
timeButtonPressed[i] = millis(); //storing the time of button pressed
wTrig.trackPlayPoly(i+1); //play track number i
Serial.print("Track number ");
Serial.print(i+1);
Serial.println(" is playing");
Serial.println("");
digitalWrite(ledPins[i],HIGH); // turn on led corresponding to the track that is playing
buttonState[i] = 1; // store 1 to indicate that the track number i is currently playing
counter++; // count how many track playing
Serial.print("Number of tracks playing: ");
Serial.print(counter);
Serial.println("\n");
firstRun[i] = 1;
Serial.print("counter: ");
Serial.println(counter);
}
}
if (millis() > timeButtonPressed[i] + trackLength[i]) // check if the track number i is finished playing
{
digitalWrite(ledPins[i],LOW); // if so - turn off led
if (millis() > timeButtonPressed[i] + trackLength[i] && buttonState[i] == 1) // check if track number i that finisihed was previusly on
{
counter--; // if so - reduce 1 from counting
buttonState[i] = 0; //store 0 for that button state at track index i
Serial.print("Track number ");
Serial.print(i+1);
Serial.println(" stopped");
Serial.println("");
Serial.print("Number of tracks playing: ");
Serial.print(counter);
Serial.println("\n");
}
}
if(buttonState[i] != preButtonState[i])
{
for (int i = 0; i < numOfButtons; i++)
{
switch (counter)
{
case 1:
wTrig.trackFade(i+1, 0, fadeTime, 0);
break;
case 2:
wTrig.trackFade(i+1, -6, fadeTime, 0);
break;
case 3:
wTrig.trackFade(i+1, -10, fadeTime, 0);
break;
case 4:
wTrig.trackFade(i+1, -12, fadeTime, 0);
break;
case 5:
wTrig.trackFade(i+1, -14, fadeTime, 0);
break;
case 6:
wTrig.trackFade(i+1, -16, fadeTime, 0);
break;
case 7:
wTrig.trackFade(i+1, -17, fadeTime, 0);
break;
case 8:
wTrig.trackFade(i+1, -18, fadeTime, 0);
break;
case 9:
wTrig.trackFade(i+1, -19, fadeTime, 0);
break;
case 10:
wTrig.trackFade(i+1, -20, fadeTime, 0);
break;
case 11:
wTrig.trackFade(i+1, -21, fadeTime, 0);
break;
case 12:
wTrig.trackFade(i+1, -22, fadeTime, 0);
break;
case 13:
wTrig.trackFade(i+1, -22, fadeTime, 0);
break;
case 14:
wTrig.trackFade(i+1, -24, fadeTime, 0);
break;
}
preButtonState[i] = buttonState[i];
}
}
}
}
