Next track by pushing button – some code enlightenment

[Anonymous]

Hi,

I have made the mp3 shield work with some funky textile buttons (when you press then, the resistivity changes -> they are diy pressure sensors – not very precise, but with enough variation to be able to measure it.)

Each button is attributed to one sound. (button 1 plays track 1, button 2 plays track 2)

But now, all tracks play until the end.

—> I would like them to stop playing when another button is pushed – but I find myself in a math loop -> of not knowing how to solve this puzzle. It’s probably very simple, but I am a Frankenscript coder!

Thanks a lot for the amazing Github documentation. I went through it, but some things went over my head.. I will see if my local hackerspace can shed some light on certain things like the interrupts..

Here is my current Frankenscript code:

 

//Program by Jeremy Blum and Wendy Van Wynsberghe
//www.jeremyblum.com

//This will turn on an LED after a threshold
int sensePin0 = 0;                   //analog textile button 0
int sensePin1 = 1;                   //analog textile button 1
int sensePin2 = 2;                   //analog textile button 2
int sensePin3 = 3;                   //analog textile button 3
int sensePin4 = 4;                   //analog textile button 4
int sensePin5 = 5;                   //analog textile button 5
int ledPin0 = 12;                    //same led for all buttons
//int inputPinButton0 = 5;              // digital textile button0
int valButton0 = 0;                    // variable for reading the pin status
//This introduces the SdFat library and the MP3shield library
#include <SPI.h>
#include <SdFat.h>
#include <SdFatUtil.h>
#include <SFEMP3Shield.h>

SFEMP3Shield MP3player; //player
SdFat sd; //card
//const int pinButton = 5;
//const int nbTracks = 5; //CHANGE THIS VALUE TO THE NUMBER OF SONGS ON YOUR SD CARD
const int volume = 6;//-3dB. The higher number, the lower volume
int counter = 1;

void setup()
{
Serial.begin(9600);
sd.begin(SD_SEL, SPI_HALF_SPEED); //start card

//Note: We don’t need to specifiy sensePin as an
//input, since it defaults to that when we read it

//The LED pin needs to be set as an output
//pinMode(ledPin0, OUTPUT);
//pinMode(inputPinButton0, INPUT);     // declare pushbutton as input

//This is the default value, but we can set it anyways
analogReference(DEFAULT); //5V Reference on UNO

//start the MP3shield
MP3player.begin(); //start player
MP3player.setVolume(volume, volume);

}

void loop()
{
// read the sensor
int val0 = analogRead(sensePin0);         //read the textile button 0
int val1 = analogRead(sensePin1);          //read the textile button 1
int val2 = analogRead(sensePin2);         //read the textile button 0
int val3 = analogRead(sensePin3);          //read the textile button 1
int val4 = analogRead(sensePin4);         //read the textile button 0
int val5 = analogRead(sensePin5);          //read the textile button 1
//valButton0 = digitalRead(inputPinButton0);  // read input value
//Serial.println (“Sensor1:”);
//Serial.println (val0);
// Serial.println (“Sensor2:”);
Serial.println (val1);

if(val0 < 50)
{
digitalWrite(ledPin0, HIGH);
//start playing track 1
MP3player.playTrack(1);
}
else
{
digitalWrite(ledPin0, LOW);

}

if(val1 < 80)
{
digitalWrite(ledPin0, HIGH);
//start playing track 1
MP3player.playTrack(2);
}
else
{
digitalWrite(ledPin0, LOW);
}

if(val2 < 80)
{
digitalWrite(ledPin0, HIGH);
//start playing track 1
MP3player.playTrack(3);
}
else
{
digitalWrite(ledPin0, LOW);
}

if(val3 < 80)
{
digitalWrite(ledPin0, HIGH);
//start playing track 1
MP3player.playTrack(4);
}
else
{
digitalWrite(ledPin0, LOW);
}

if(val4 < 80)
{
digitalWrite(ledPin0, HIGH);
//start playing track 1
MP3player.playTrack(5);
}
else
{
digitalWrite(ledPin0, LOW);
}

if(val5 < 80)
{
digitalWrite(ledPin0, HIGH);
//start playing track 1
MP3player.playTrack(6);
}
else
{
digitalWrite(ledPin0, LOW);
}

/*}
if (valButton0 == HIGH) {            // check if the input is HIGH
digitalWrite(ledPin0, HIGH);  // turn LED ON
MP3player.playTrack(2);
}
else {
digitalWrite(ledPin0, LOW); // turn LED OFF
}*/

}

 

Thanks!

Greetings,

Wendy

[Michael P. Flaga]

You need only add

MP3player.stopTrack();

in front of the

MP3player.playTrack(??);

To stop any currently playing tracks, and it won’t care if there is no track playing, it will just fall through.

[Author]

Posts