IVIbot fur elise

#include <p18f4550.h>
#include <delays.h>

typedef unsigned char byte;

// Bunch of prototypes:
extern void InitializeSystem(void); // Declared in inits.c
       void testRoutine(void);


// Point of entry:
void main(void) {
    InitializeSystem();
    testRoutine();
}


// Struct outline for a music note:
typedef struct {
    unsigned int ledbit;
    unsigned int delay;
} Note;


// Declare some music notes:
Note A = {1, 40};
Note B = {2, 20};
Note C = {4, 40};
Note D = {8, 80};
Note E = {16, 160};
Note F = {32, 320};
Note G = {33, 640};


void testRoutine(void) {
    Note songNotes[] = {&A, &B};//,E,B,D,C,A,D,F,A,B};
    Note* notePlaying;

    byte i = 0, j = 0;
    for(;;) {

        notePlaying = &songNotes[i];

        // Repeat a few times to create a persistent tone.
        for(j = 0; j < 200; ++j) {
            PORTAbits.RA5 = ~PORTAbits.RA5; // Toggle between speaker on, speaker off.

            PORTB = notePlaying->ledbit;
            Delay100TCYx(notePlaying->delay);
        }

        // Disable all leds and the speaker after the tone has been played long enough.
        PORTAbits.RA5 = 0;
        PORTB         = 0;

        Delay10KTCYx(1000);

        // Jump back to the start of the array, if the end has been reached.
        if(++i > 2) i = 0;
    }
}