// PIC18F4520 Configuration Bit Settings
#pragma config OSC = XT // Oscillator Selection bits (XT oscillator)
#pragma config LVP = OFF // Single-Supply ICSP Enable
#pragma config WDT = OFF // Watchdog Timer Enable bit
#include <xc.h>
#include <stdlib.h>
#define _XTAL_FREQ 4000000


/*
 KEY A = 440.00Hz
 T2CON = 0b00000111;
 PR2 = 140 With prescale of 16*
 CCPR1L = 0b01000110;
 CCP1CON = 0b00101111;

 KEY B = 493.88Hz
 T2CON = 0b00000111;
 PR2 = 125 with prescale of 16
 CCPR1L = 0b00111111;
 CCPR1CON = 0b00001111;

 KEY G = 392.00Hz
 T2CON = 0b00000111;
 PR2 = 158 with prescale of 16
 CCPR1L = 0b01001111;
 CCP1CON = 0b00101111;

 KEY E = 329.63Hz
 T2CON = 0b00000111;
 PR2 = 188 with prescale of 16
 CCPR1L = 0b01011110;
 CCP1CON = 0b00101111;


 KEY F sharp = 369.99Hz
 T2CON = 0b00000111;
 PR2 = 167
 CCPR1L = 0b01010100;
 CCP1CON = 0b00101111;

 Key E5 = 659.25Hz
 T2CON = 0b00000111;
 PR2 = 94
 CCPR1L = 0b00101111;
 CCP1CON = 0b00101111;

 Key D5 = 587.33Hz
 T2CON = 0b00000111;
 PR2 = 105
 CCPR1L = 0b00110101;
 CCP1CON = 0b00001111;

 Key B5 = 987.77Hz
 T2CON = 0b00000111;
 PR2 = 62
 CCPR1L = 0b00011111;
 CCP1CON = 0b00101111;

 Key A5 = 880Hz
 T2CON = 0b00000111;
 PR2 = 69;
 CCPR1L = 0b00100011;
 CCP1CON = 0b00001111;

 Key F#5 = 739.99Hz
 T2CON = 0b00000111;
 PR2 = 83;
 CCPR1L = 0b00101010;
 CCP1CON = 0b00001111;

 Key E5 = 659.25Hz
 T2CON = 0b00000111;
 PR2 = 93;
 CCPR1L = 0b00101111;
 CCP1CON = 0b00001111;

 Key G5 = 789.99Hz
 T2CON = 0b00000111;
 PR2 = 78;
 CCPR1L = 0b00100111;
 CCP1CON = 0b00101111;

 Key F5 =  698.46Hz
 T2CON = 0b00000111;
 PR2 = 88;
 CCPR1L = 0b00101100;
 CCP1CON = 0b00101111;


 */

void interrupt highISR(void);
void delay (unsigned int len);

unsigned char pr2 [27] = {140, 125, 140, 158, 188, 167, 158, 140, 94, 105, 125, 62, 69, 78, 83, 93,
                            69, 78, 83, 62, 69, 78, 83, 93, 83, 93, 78};
unsigned char dutyCycleCCPR1L [27] = {0b01000110, 0b00111111, 0b01000110, 0b01001111, 0b01011110, 0b01010100,
                                      0b01001111, 0b01000110, 0b00101111, 0b00110101, 0b00111111, 0b00011111,
                                      0b00100011, 0b00100111, 0b00101010, 0b00101111, 0b00100011, 0b00100111,
                                      0b00101010, 0b00011111, 0b00100011, 0b00100111, 0b00101010, 0b00101111,
                                      0b00101010, 0b00101111, 0b00100111};

unsigned char dutyCycleCCP1CON[27] = {0b00101111, 0b00001111, 0b00101111, 0b00101111, 0b00101111, 0b00101111, 0b00101111,
                                      0b00101111, 0b00101111, 0b00001111, 0b00001111, 0b00101111, 0b00001111, 0b00101111,
                                      0b00001111, 0b00001111, 0b00001111, 0b00101111, 0b00001111, 0b00101111, 0b00001111,
                                      0b00101111, 0b00001111, 0b00001111, 0b00001111, 0b00001111, 0b00101111};

unsigned int delayTimings[27] = {300, 300, 500, 700, 1000, 1000, 1000, 1000, 1000, 1000, 1400/*32PRESCALE*/, 250, 250, 300, 250, 700,
                                  250, 250, 700, 500, 300, 300, 700, 500, 500, 500, 1000};

unsigned char tmr0HByte[27] = {0xB6, 0xB6, 0x85, 0x55, 0x0B,0x0B,0x0B,0x0B,0x0B,0x0B, 0x55/*32PRESCALE*/,
                               0xC2,0xC2,0xB6, 0xC2,0x55,0xC2,0xC2,0x55,0x85,0xB6,0xB6,0x55,0x85,0x85,0x85,
                                0x0B};
unsigned char tmr0LByte[27] = {0xC2, 0xC2, 0xEE, 0x1A, 0xDC,0xDC,0xDC,0xDC,0xDC,0xDC, 0x1A/*32PRESCALE*/,
                               0xF7,0xF7, 0xC2,0xF7,0x1A,0xF7,0xF7,0x1A,0xEE,0xC2,0xC2,0x1A,0xEE,0xEE,0xEE,
                               0xDC};

unsigned char tmr0CON[27] = {0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000100,
                             0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,
                             0b10000011,0b10000011,0b10000011,0b10000011,0b10000011};

unsigned int i = 0;
unsigned int x = 0;

void main ()
{
ADCON1 = 0x0F;
INTCONbits.GIEH = 0; // disables all interrupts
RCONbits.IPEN = 1; // IPEN
INTCON2bits.TMR0IP = 1; // high priority
TMR0H = 0x00;
TMR0L = 0x00;
TRISC = 0b11111011; // Configure RC2 (CCP1) as output

    TMR0H = tmr0HByte[i];
    TMR0L = tmr0LByte[i];
    T0CON = tmr0CON[i];
    INTCONbits.TMR0IF = 0;
    INTCONbits.TMR0IE = 1;
    INTCONbits.GIEH = 1;
    while(x<27); // Do nothing, until all tones played

}

void interrupt highISR(void){
    if(INTCONbits.TMR0IF)
    {
        T2CON = 0b00000111;   //But
        PR2 = pr2[x];
        CCPR1L = dutyCycleCCPR1L[x]; // in array
        CCP1CON =  dutyCycleCCP1CON[x];
        INTCONbits.TMR0IF = 0;
        x++;
    }
}