I have this code in C for a simulation in Proteus

here is the hardware for the simulation:

Bot how can I make that when I press a button if a melody is reproducing, it stop and starts reproducing the other melody?

here is the code

#include #include

#define NOTE_B0 31 #define NOTE_C1 33 #define NOTE_CS1 35 #define NOTE_D1 37 #define NOTE_DS1 39 #define NOTE_E1 41 #define NOTE_F1 44 #define NOTE_FS1 46 #define NOTE_G1 49 #define NOTE_GS1 52 #define NOTE_A1 55 #define NOTE_AS1 58 #define NOTE_B1 62 #define NOTE_C2 65 #define NOTE_CS2 69 #define NOTE_D2 73 #define NOTE_DS2 78 #define NOTE_E2 82 #define NOTE_F2 87 #define NOTE_FS2 93 #define NOTE_G2 98 #define NOTE_GS2 104 #define NOTE_A2 110 #define NOTE_AS2 117 #define NOTE_B2 123 #define NOTE_C3 131 #define NOTE_CS3 139 #define NOTE_D3 147 #define NOTE_DS3 156 #define NOTE_E3 165 #define NOTE_F3 175 #define NOTE_FS3 185 #define NOTE_G3 196 #define NOTE_GS3 208 #define NOTE_A3 220 #define NOTE_AS3 233 #define NOTE_B3 247 #define NOTE_C4 262 #define NOTE_CS4 277 #define NOTE_D4 294 #define NOTE_DS4 311 #define NOTE_E4 330 #define NOTE_F4 349 #define NOTE_FS4 370 #define NOTE_G4 392 #define NOTE_GS4 415 #define NOTE_A4 440 #define NOTE_AS4 466 #define NOTE_B4 494 #define NOTE_C5 523 #define NOTE_CS5 554 #define NOTE_D5 587 #define NOTE_DS5 622 #define NOTE_E5 659 #define NOTE_F5 698 #define NOTE_FS5 740 #define NOTE_G5 784 #define NOTE_GS5 831 #define NOTE_A5 880 #define NOTE_AS5 932 #define NOTE_B5 988 #define NOTE_C6 1047 #define NOTE_CS6 1109 #define NOTE_D6 1175 #define NOTE_DS6 1245 #define NOTE_E6 1319 #define NOTE_F6 1397 #define NOTE_FS6 1480 #define NOTE_G6 1568 #define NOTE_GS6 1661 #define NOTE_A6 1760 #define NOTE_AS6 1865 #define NOTE_B6 1976 #define NOTE_C7 2093 #define NOTE_CS7 2217 #define NOTE_D7 2349 #define NOTE_DS7 2489 #define NOTE_E7 2637 #define NOTE_F7 2794 #define NOTE_FS7 2960 #define NOTE_G7 3136 #define NOTE_GS7 3322 #define NOTE_A7 3520 #define NOTE_AS7 3729 #define NOTE_B7 3951 #define NOTE_C8 4186 #define NOTE_CS8 4435 #define NOTE_D8 4699 #define NOTE_DS8 4978 #define REST 0

int melody2[] = {

// Pink Panther theme // Score available at https://musescore.com/benedictsong/the-pink-panther // Theme by Masato Nakamura, arranged by Teddy Mason

REST,2, REST,4, REST,8, NOTE_DS4,8, NOTE_E4,-4, REST,8, NOTE_FS4,8, NOTE_G4,-4, REST,8, NOTE_DS4,8, NOTE_E4,-8, NOTE_FS4,8, NOTE_G4,-8, NOTE_C5,8, NOTE_B4,-8, NOTE_E4,8, NOTE_G4,-8, NOTE_B4,8, NOTE_AS4,2, NOTE_A4,-16, NOTE_G4,-16, NOTE_E4,-16, NOTE_D4,-16, NOTE_E4,2, REST,4, REST,8, NOTE_DS4,4,

NOTE_E4,-4, REST,8, NOTE_FS4,8, NOTE_G4,-4, REST,8, NOTE_DS4,8, NOTE_E4,-8, NOTE_FS4,8, NOTE_G4,-8, NOTE_C5,8, NOTE_B4,-8, NOTE_G4,8, NOTE_B4,-8, NOTE_E5,8, NOTE_DS5,1, NOTE_D5,2, REST,4, REST,8, NOTE_DS4,8, NOTE_E4,-4, REST,8, NOTE_FS4,8, NOTE_G4,-4, REST,8, NOTE_DS4,8, NOTE_E4,-8, NOTE_FS4,8, NOTE_G4,-8, NOTE_C5,8, NOTE_B4,-8, NOTE_E4,8, NOTE_G4,-8, NOTE_B4,8,

NOTE_AS4,2, NOTE_A4,-16, NOTE_G4,-16, NOTE_E4,-16, NOTE_D4,-16, NOTE_E4,-4, REST,4, REST,4, NOTE_E5,-8, NOTE_D5,8, NOTE_B4,-8, NOTE_A4,8, NOTE_G4,-8, NOTE_E4,-8, NOTE_AS4,16, NOTE_A4,-8, NOTE_AS4,16, NOTE_A4,-8, NOTE_AS4,16, NOTE_A4,-8, NOTE_AS4,16, NOTE_A4,-8, NOTE_G4,-16, NOTE_E4,-16, NOTE_D4,-16, NOTE_E4,16, NOTE_E4,16, NOTE_E4,2,

};

// sizeof gives the number of bytes, each int value is composed of two bytes (16 bits) // there are two values per note (pitch and duration), so for each note there are four bytes int notes2 = sizeof(melody2) / sizeof(melody2[0]) / 2;

// this calculates the duration of a whole note in ms int wholenote2 = 2000;

int divider2 = 0, noteDuration2 = 0;

flash int melody1[] = {

// Gren Hill Zone - Sonic the Hedgehog // Score available at https://musescore.com/user/248346/scores/461661 // Theme by Masato Nakamura, arranged by Teddy Mason

REST,2, NOTE_D5,8, NOTE_B4,4, NOTE_D5,8, //1 NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2, REST,8, NOTE_A4,8, NOTE_FS5,8, NOTE_E5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2, REST,4, NOTE_D5,8, NOTE_B4,4, NOTE_D5,8, NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2,

REST,8, NOTE_B4,8, NOTE_B4,8, NOTE_G4,4, NOTE_B4,8, //7 NOTE_A4,4, NOTE_B4,8, NOTE_A4,4, NOTE_D4,2, REST,4, NOTE_D5,8, NOTE_B4,4, NOTE_D5,8, NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2, REST,8, NOTE_A4,8, NOTE_FS5,8, NOTE_E5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2,

REST,4, NOTE_D5,8, NOTE_B4,4, NOTE_D5,8, //13 NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2, REST,8, NOTE_B4,8, NOTE_B4,8, NOTE_G4,4, NOTE_B4,8, NOTE_A4,4, NOTE_B4,8, NOTE_A4,4, NOTE_D4,8, NOTE_D4,8, NOTE_FS4,8, NOTE_E4,-1, REST,8, NOTE_D4,8, NOTE_E4,8, NOTE_FS4,-1,

REST,8, NOTE_D4,8, NOTE_D4,8, NOTE_FS4,8, NOTE_F4,-1, //20 REST,8, NOTE_D4,8, NOTE_F4,8, NOTE_E4,-1, //end 1

//repeats from 1

REST,2, NOTE_D5,8, NOTE_B4,4, NOTE_D5,8, //1 NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2, REST,8, NOTE_A4,8, NOTE_FS5,8, NOTE_E5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2, REST,4, NOTE_D5,8, NOTE_B4,4, NOTE_D5,8, NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2,

REST,8, NOTE_B4,8, NOTE_B4,8, NOTE_G4,4, NOTE_B4,8, //7 NOTE_A4,4, NOTE_B4,8, NOTE_A4,4, NOTE_D4,2, REST,4, NOTE_D5,8, NOTE_B4,4, NOTE_D5,8, NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2, REST,8, NOTE_A4,8, NOTE_FS5,8, NOTE_E5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2,

REST,4, NOTE_D5,8, NOTE_B4,4, NOTE_D5,8, //13 NOTE_CS5,4, NOTE_D5,8, NOTE_CS5,4, NOTE_A4,2, REST,8, NOTE_B4,8, NOTE_B4,8, NOTE_G4,4, NOTE_B4,8, NOTE_A4,4, NOTE_B4,8, NOTE_A4,4, NOTE_D4,8, NOTE_D4,8, NOTE_FS4,8, NOTE_E4,-1, REST,8, NOTE_D4,8, NOTE_E4,8, NOTE_FS4,-1,

REST,8, NOTE_D4,8, NOTE_D4,8, NOTE_FS4,8, NOTE_F4,-1, //20 REST,8, NOTE_D4,8, NOTE_F4,8, NOTE_E4,8, //end 2 NOTE_E4,-2, NOTE_A4,8, NOTE_CS5,8, NOTE_FS5,8, NOTE_E5,4, NOTE_D5,8, NOTE_A5,-4,

};

int notes = sizeof(melody1) / sizeof(melody1[0]) / 2;

int wholenote = 1714;

int divider = 0, noteDuration = 0;

void tono (float f) { float Cuentas; unsigned int CuentasEnt; DDRB.1=1; Cuentas=500000.0/f; CuentasEnt=Cuentas; if ((Cuentas-CuentasEnt)>=0.5) //Redondear CuentasEnt++; TCCR1A=0x40; TCCR1B=0x09; OCR1AH=(CuentasEnt-1)>>8; OCR1AL=(CuentasEnt-1)&0xFF; }

void noTono() { TCCR1A=0x00; TCCR1B=0x00; PORTB.1=0; //Apaga puerto manualmente }

void main(void) { unsigned int thisNote; unsigned int thisNote2; CLKPR=0x80; CLKPR=0x04; while (1) {

if (PINC.0==1){

// iterate over the notes of the melody. // Remember, the array is twice the number of notes (notes + durations) for (thisNote = 0; thisNote

// calculates the duration of each note divider = melody1[thisNote + 1]; if (divider > 0) { // regular note, just proceed noteDuration = (wholenote) / divider; } else if (divider

tono(melody1[thisNote]); delay_ms(noteDuration * 0.9); noTono(); delay_ms(noteDuration * 0.1); } } else { if (PINC.1==1){

// iterate over the notes of the melody. // Remember, the array is twice the number of notes (notes + durations) for (thisNote2 = 0; thisNote2

// calculates the duration of each note divider2 = melody2[thisNote2 + 1]; if (divider2 > 0) { // regular note, just proceed noteDuration2 = (wholenote2) / divider2; } else if (divider2

tono(melody2[thisNote2]); delay_ms(noteDuration2 * 0.9); noTono(); delay_ms(noteDuration2 * 0.1); } }

}

} }