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// PIC18F4520 Configuration Bit Settings
1		// PIC18F4520 Configuration Bit Settings
2		#pragma config OSC = XT // Oscillator Selection bits (XT oscillator)
3		#pragma config LVP = OFF // Single-Supply ICSP Enable
4		#pragma config WDT = OFF // Watchdog Timer Enable bit
5		#include <xc.h>
6		#include <stdlib.h>
7		#define _XTAL_FREQ 4000000
8
9
10		/*
11		KEY A = 440.00Hz
12		T2CON = 0b00000111;
13		PR2 = 140 With prescale of 16*
14		CCPR1L = 0b01000110;
15		CCP1CON = 0b00101111;
16
17		KEY B = 493.88Hz
18		T2CON = 0b00000111;
19		PR2 = 125 with prescale of 16
20		CCPR1L = 0b00111111;
21		CCPR1CON = 0b00001111;
22
23		KEY G = 392.00Hz
24		T2CON = 0b00000111;
25		PR2 = 158 with prescale of 16
26		CCPR1L = 0b01001111;
27		CCP1CON = 0b00101111;
28
29		KEY E = 329.63Hz
30		T2CON = 0b00000111;
31		PR2 = 188 with prescale of 16
32		CCPR1L = 0b01011110;
33		CCP1CON = 0b00101111;
34
35
36		KEY F sharp = 369.99Hz
37		T2CON = 0b00000111;
38		PR2 = 167
39		CCPR1L = 0b01010100;
40		CCP1CON = 0b00101111;
41
42		Key E5 = 659.25Hz
43		T2CON = 0b00000111;
44		PR2 = 94
45		CCPR1L = 0b00101111;
46		CCP1CON = 0b00101111;
47
48		Key D5 = 587.33Hz
49		T2CON = 0b00000111;
50		PR2 = 105
51		CCPR1L = 0b00110101;
52		CCP1CON = 0b00001111;
53
54		Key B5 = 987.77Hz
55		T2CON = 0b00000111;
56		PR2 = 62
57		CCPR1L = 0b00011111;
58		CCP1CON = 0b00101111;
59
60		Key A5 = 880Hz
61		T2CON = 0b00000111;
62		PR2 = 69;
63		CCPR1L = 0b00100011;
64		CCP1CON = 0b00001111;
65
66		Key F#5 = 739.99Hz
67		T2CON = 0b00000111;
68		PR2 = 83;
69		CCPR1L = 0b00101010;
70		CCP1CON = 0b00001111;
71
72		Key E5 = 659.25Hz
73		T2CON = 0b00000111;
74		PR2 = 93;
75		CCPR1L = 0b00101111;
76		CCP1CON = 0b00001111;
77
78		Key G5 = 789.99Hz
79		T2CON = 0b00000111;
80		PR2 = 78;
81		CCPR1L = 0b00100111;
82		CCP1CON = 0b00101111;
83
84		Key F5 = 698.46Hz
85		T2CON = 0b00000111;
86		PR2 = 88;
87		CCPR1L = 0b00101100;
88		CCP1CON = 0b00101111;
89
90
91		*/
92
93		void interrupt highISR(void);
94		void delay (unsigned int len);
95
96		unsigned char pr2 [27] = {140, 125, 140, 158, 188, 167, 158, 140, 94, 105, 125, 62, 69, 78, 83, 93,
97		69, 78, 83, 62, 69, 78, 83, 93, 83, 93, 78};
98		unsigned char dutyCycleCCPR1L [27] = {0b01000110, 0b00111111, 0b01000110, 0b01001111, 0b01011110, 0b01010100,
99		0b01001111, 0b01000110, 0b00101111, 0b00110101, 0b00111111, 0b00011111,
100		0b00100011, 0b00100111, 0b00101010, 0b00101111, 0b00100011, 0b00100111,
101		0b00101010, 0b00011111, 0b00100011, 0b00100111, 0b00101010, 0b00101111,
102		0b00101010, 0b00101111, 0b00100111};
103
104		unsigned char dutyCycleCCP1CON[27] = {0b00101111, 0b00001111, 0b00101111, 0b00101111, 0b00101111, 0b00101111, 0b00101111,
105		0b00101111, 0b00101111, 0b00001111, 0b00001111, 0b00101111, 0b00001111, 0b00101111,
106		0b00001111, 0b00001111, 0b00001111, 0b00101111, 0b00001111, 0b00101111, 0b00001111,
107		0b00101111, 0b00001111, 0b00001111, 0b00001111, 0b00001111, 0b00101111};
108
109		unsigned int delayTimings[27] = {300, 300, 500, 700, 1000, 1000, 1000, 1000, 1000, 1000, 1400/32PRESCALE/, 250, 250, 300, 250, 700,
110		250, 250, 700, 500, 300, 300, 700, 500, 500, 500, 1000};
111
112		unsigned char tmr0HByte[27] = {0xB6, 0xB6, 0x85, 0x55, 0x0B,0x0B,0x0B,0x0B,0x0B,0x0B, 0x55/32PRESCALE/,
113		0xC2,0xC2,0xB6, 0xC2,0x55,0xC2,0xC2,0x55,0x85,0xB6,0xB6,0x55,0x85,0x85,0x85,
114		0x0B};
115		unsigned char tmr0LByte[27] = {0xC2, 0xC2, 0xEE, 0x1A, 0xDC,0xDC,0xDC,0xDC,0xDC,0xDC, 0x1A/32PRESCALE/,
116		0xF7,0xF7, 0xC2,0xF7,0x1A,0xF7,0xF7,0x1A,0xEE,0xC2,0xC2,0x1A,0xEE,0xEE,0xEE,
117		0xDC};
118
119		unsigned char tmr0CON[27] = {0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000100,
120		0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,0b10000011,
121		0b10000011,0b10000011,0b10000011,0b10000011,0b10000011};
122
123		unsigned int i = 0;
124		unsigned int x = 0;
125
126		void main ()
127		{
128		ADCON1 = 0x0F;
129		INTCONbits.GIEH = 0; // disables all interrupts
130		RCONbits.IPEN = 1; // IPEN
131		INTCON2bits.TMR0IP = 1; // high priority
132		TMR0H = 0x00;
133		TMR0L = 0x00;
134		TRISC = 0b11111011; // Configure RC2 (CCP1) as output
135
136		TMR0H = tmr0HByte[i];
137		TMR0L = tmr0LByte[i];
138		T0CON = tmr0CON[i];
139		INTCONbits.TMR0IF = 0;
140		INTCONbits.TMR0IE = 1;
141		INTCONbits.GIEH = 1;
142	-	i++;
142	+	while(x<27); // Do nothing, until all tones played
143
144		}
145
146		void interrupt highISR(void){
147		if(INTCONbits.TMR0IF)
148		{
149		T2CON = 0b00000111; //But
150		PR2 = pr2[x];
151		CCPR1L = dutyCycleCCPR1L[x]; // in array
152		CCP1CON = dutyCycleCCP1CON[x];
153		INTCONbits.TMR0IF = 0;
154		x++;
155		}
156		}