Combining Arduino files/ functions?

Hi, I am very new to arduino programming. I have an arduino uno rev 3 with a wave/audio shield that allows me to play files through an SD card. I have two functions that i have programmed for the arduino. One is it controls a servo motor with a push button and the other is playing different audio files from the sd card with individual push buttons. I was wondering if there is a way to combine these two files so that the arduino can run the servos and audio files at the same time with their own individual buttons. Is that possible or can the uno rev 3 not do that? Any advice or anything would be greatly appreciated. The two codes are below.

Audio Push button code:

(Please use the code tags button, </> on the menu, next time you post. Thanks. Moderator)

#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 5  // button debouncer

// here is where we define the buttons that we'll use. button "1" is the first, button "6" is the 6th, etc
byte buttons[] = {14, 15, 16, 17, 18, 19};
// This handy macro lets us determine how big the array up above is, by checking the size
#define NUMBUTTONS sizeof(buttons)
// we will track if a button is just pressed, just released, or 'pressed' (the current state
volatile byte pressed[NUMBUTTONS], justpressed[NUMBUTTONS], justreleased[NUMBUTTONS];

// 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() {
 byte i;
 
 // set up serial port
 Serial.begin(9600);
 putstring_nl("WaveHC with ");
 Serial.print(NUMBUTTONS, DEC);
 putstring_nl("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!
 
 // 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);

 // Make input & enable pull-up resistors on switch pins
 for (i=0; i< NUMBUTTONS; i++) {
   pinMode(buttons[i], INPUT);
   digitalWrite(buttons[i], 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!");
 
 TCCR2A = 0;
 TCCR2B = 1<<CS22 | 1<<CS21 | 1<<CS20;

 //Timer2 Overflow Interrupt Enable
 TIMSK2 |= 1<<TOIE2;


}

SIGNAL(TIMER2_OVF_vect) {
 check_switches();
}

void check_switches()
{
 static byte previousstate[NUMBUTTONS];
 static byte currentstate[NUMBUTTONS];
 byte index;

 for (index = 0; index < NUMBUTTONS; index++) {
   currentstate[index] = digitalRead(buttons[index]);   // read the button
   
   /*     
   Serial.print(index, DEC);
   Serial.print(": cstate=");
   Serial.print(currentstate[index], DEC);
   Serial.print(", pstate=");
   Serial.print(previousstate[index], DEC);
   Serial.print(", press=");
   */
   
   if (currentstate[index] == previousstate[index]) {
     if ((pressed[index] == LOW) && (currentstate[index] == LOW)) {
         // just pressed
         justpressed[index] = 1;
     }
     else if ((pressed[index] == HIGH) && (currentstate[index] == HIGH)) {
         // just released
         justreleased[index] = 1;
     }
     pressed[index] = !currentstate[index];  // remember, digital HIGH means NOT pressed
   }
   //Serial.println(pressed[index], DEC);
   previousstate[index] = currentstate[index];   // keep a running tally of the buttons
 }
}


void loop() {
 byte i;
 
 if (justpressed[0]) {
     justpressed[0] = 0;
     playcomplete("-6.WAV");
 }
 if (justpressed[1]) {
     justpressed[1] = 0;
     playcomplete("-10.WAV");
 }
 if (justpressed[2]) {
     justpressed[2] = 0;
     playcomplete("-8.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);
 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();
}





Servo motor push button code:

#include <Servo.h>
int button = 7; //button pin, connect to ground to move servo
int press = 0;
int pos = 0;
Servo servo;
boolean toggle = true;

void setup()
{
 pinMode(button, INPUT); //arduino monitor pin state
 servo.attach(9); //pin for servo control signal
 digitalWrite(5, HIGH); 
}

void loop()
{
 press = digitalRead(button);
 if (press == LOW)
 {
   if(toggle)
   {for (pos = 5; pos <=30; pos += 1){
   servo.write(pos);
   delay(15);}
   for (pos = 30;
   pos >= 5; pos -=1){
   servo.write(pos);
   delay(2);
   }
   }
 }
}

This here would typically be a problem:

 while (wave.isplaying) {
 // do nothing while its playing
 }

However, you seem to check the buttons via interrupt:

SIGNAL(TIMER2_OVF_vect) {
 check_switches();
}

So create another interrupt service routine to check the servo button and act on that when pressed.

When i try compiling I get this error message:

Arduino: 1.8.9 (Windows 10), Board: "Arduino/Genuino Uno"

C:\Users\dgs96\Documents\ME 4020\3_buttons_and_1_servo\3_buttons_and_1_servo.ino: In function 'void loop()':

C:\Users\dgs96\Documents\ME 4020\3_buttons_and_1_servo\3_buttons_and_1_servo.ino:167:28: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]

playcomplete("-6.WAV");

^

C:\Users\dgs96\Documents\ME 4020\3_buttons_and_1_servo\3_buttons_and_1_servo.ino:171:29: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]

playcomplete("-10.WAV");

^

C:\Users\dgs96\Documents\ME 4020\3_buttons_and_1_servo\3_buttons_and_1_servo.ino:175:28: warning: ISO C++ forbids converting a string constant to 'char*' [-Wwrite-strings]

playcomplete("-8.WAV");

^

C:\Users\dgs96\Documents\ME 4020\3_buttons_and_1_servo\serv.ino: In function 'void setup()':

serv:8:6: error: redefinition of 'void setup()'

void setup()

^

C:\Users\dgs96\Documents\ME 4020\3_buttons_and_1_servo\3_buttons_and_1_servo.ino:50:6: note: 'void setup()' previously defined here

void setup() {

^

C:\Users\dgs96\Documents\ME 4020\3_buttons_and_1_servo\serv.ino: In function 'void loop()':

serv:15:6: error: redefinition of 'void loop()'

void loop()

^

C:\Users\dgs96\Documents\ME 4020\3_buttons_and_1_servo\3_buttons_and_1_servo.ino:162:6: note: 'void loop()' previously defined here

void loop() {

^

exit status 1 redefinition of 'void setup()'

This report would have more information with "Show verbose output during compilation" option enabled in File -> Preferences.

That error message says you have two loop() and two setup(). You can only have one of each.

One quick way around it is to give the second loop a name (for example runServo() if it is the one running the servo) and then call that from the other loop().

Ok that makes sense. How would I go about changing that in the code?

How would I go about changing that in the code?

With any text editor.