File content as of revision 0:757da73b539a:

#include "mbed.h"
#include "music.h"
#include "TARDIS_ARCHIVE.h"

/********************************************************/
AnalogIn pitch(p19);                //Potentiometer sets up the pitch of the song
AnalogIn tempo(p20);                //Potentiometer to set tempo of the song
DigitalIn joyUP(p15);               //Play song of the Doctor (Master)
DigitalIn joyDOWN(p12);             //Play song of the Companion (Slave)
DigitalIn joyMID(p14);              //Stop playing either master or Slave song.
PwmOut speaker(p26);                //Speaker on the mbed

/*============SERIAL COMMUNICATION==============*/
I2C doctor_tardis (p9, p10);           //mosi/miso/sck of the Doctor
/********************************************************/
Serial pc(USBTX, USBRX);
int send_note;                   //word we will send
int rec_note;                    //value received from master
const int addr = 0x52;

/************************************|I Am the Doctor|**********************************/
float frequency[]= {D3, E3, F3, G3,
                    F3 ,E3, D3, E3, D3
                   };
float beat[]= {.7,.7,.7,0.3,.7,.7,.7,0.3,0.3, 0.3};
/***************************************************************************************/

int main()
{
    while(1) {
        
        if (joyUP) {
            playTheDoctor();
            wait(0.01);
        } else if (joyDOWN) {
            playTheCompanion();
            wait(0.01);
        } else if (joyMID) {
            songOfMyPeople(frequency, beat);
            //breakConnection(); //Dalek attack
            wait(0.01);
        }
        wait (0.01);
    }
}
//========================================================================================================================================
//========================================================================================================================================
//========================================================================================================================================


void playTheCompanion()
{
    doctor_tardis.start();
    doctor_tardis.write(addr|0x01);
    while(doctor_tardis.read(addr)!=0) {
        rec_note = doctor_tardis.read(addr);
        pc.printf("\n\rReceived note = '%d'", rec_note);
        speaker.period(1/(2*notes[rec_note])); // set PWM period
        speaker=0.5;
    }
    doctor_tardis.stop();
    return;
}

void playTheDoctor()
{
    doctor_tardis.start();
    doctor_tardis.write(addr);

    for (int i=0; i<=8; i++) {
        send_note = frequency[i];
        doctor_tardis.write(send_note);

        float value = lookupNoteFrq(frequency, i);
        speaker.period(1/(2*value)); // set PWM period
        speaker=0.5;
        wait(0.4*beat[i]);

        if (joyMID) {
            speaker = 0; //reset speaker duty cycle
            doctor_tardis.stop();
            wait(2);     //delay for inferior humans
            return;
        } else if(joyDOWN) {
            doctor_tardis.stop();
            return;
        }
    }
    doctor_tardis.stop();
}

void playTheSlave(int frequency)
{
    float frqNote = notes[frequency];
    pc.printf("\n\rFrq of the note = '%f", frequency, "\n\rFrq of the note = '%f'", frqNote);
    speaker.period(1/(2*frqNote)); // set PWM period
    speaker=0.5;
}

/*--------------Play the song of the Doctor--------------*/
void songOfMyPeople(float frequency[], float beat[])
{
    while(1) { //run infinetly unless interupted
        for (int i=0; i<=8; i++) {
            float value = lookupNoteFrq(frequency, i);
            speaker.period(1/(2*value)); // set PWM period
            speaker=0.5; // set duty cycle
            wait(0.4*beat[i]);
            if (joyMID) {
                speaker = 0; //reset speaker duty cycle
                wait(2);     //delay for inferior humans
                return;
            }
        }
        speaker = 0;
        wait(0.25);
    }
}
/*--------------Play the song of the Companions--------------*/

void songOfYourPeople(int frequency)
{

}


/** Look up the frequency of the note from music.h file
 *  @param frq[], array of the song
 *  @param k, location of the note in the array
 */
float lookupNoteFrq(float frq[], int k)
{
    int location_of_note = frequency[k];
    pc.printf("\n\rLocation of the note = '%d'", location_of_note);

    float vNote = notes[location_of_note];
    pc.printf("\n\rFrq of the note = '%f'", vNote);
    return vNote;
}