1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
|
#include "beeps.h"
#include <math.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <avr/io.h>
#define PI 3.14159265
void delay_us(int count) {
while(count--) {
_delay_us(1);
}
}
int voices = 0;
double frequency = 0;
int volume = 0;
int position = 0;
double frequencies[8] = {0, 0, 0, 0, 0, 0, 0, 0};
int volumes[8] = {0, 0, 0, 0, 0, 0, 0, 0};
bool sliding = false;
#define RANGE 1000
volatile int i=0; //elements of the wave
void beeps() {
play_notes();
}
void send_freq(double freq, int vol) {
int duty = (((double)F_CPU) / freq);
ICR3 = duty; // Set max to the period
OCR3A = duty >> (0x10 - vol); // Set compare to half the period
}
void stop_all_notes() {
voices = 0;
TCCR3A = 0;
TCCR3B = 0;
frequency = 0;
volume = 0;
for (int i = 0; i < 8; i++) {
frequencies[i] = 0;
volumes[i] = 0;
}
}
void stop_note(double freq) {
for (int i = 7; i >= 0; i--) {
if (frequencies[i] == freq) {
frequencies[i] = 0;
volumes[i] = 0;
for (int j = i; (j < 7); j++) {
frequencies[j] = frequencies[j+1];
frequencies[j+1] = 0;
volumes[j] = volumes[j+1];
volumes[j+1] = 0;
}
}
}
voices--;
if (voices < 0)
voices = 0;
if (voices == 0) {
TCCR3A = 0;
TCCR3B = 0;
frequency = 0;
volume = 0;
} else {
double freq = frequencies[voices - 1];
int vol = volumes[voices - 1];
if (frequency < freq) {
sliding = true;
for (double f = frequency; f <= freq; f += ((freq - frequency) / 500.0)) {
send_freq(f, vol);
}
sliding = false;
} else if (frequency > freq) {
sliding = true;
for (double f = frequency; f >= freq; f -= ((frequency - freq) / 500.0)) {
send_freq(f, vol);
}
sliding = false;
}
send_freq(freq, vol);
frequency = freq;
volume = vol;
}
}
void init_notes() {
// TCCR1A = (1 << COM1A1) | (0 << COM1A0) | (1 << WGM11) | (1 << WGM10);
// TCCR1B = (1 << COM1B1) | (0 << COM1A0) | (1 << WGM13) | (1 << WGM12) | (0 << CS12) | (0 << CS11) | (1 << CS10);
// DDRC |= (1<<6);
// TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
// TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (0 << CS31) | (1 << CS30);
// ICR3 = 0xFFFF;
// OCR3A = (int)((float)wave[i]*ICR3/RANGE); //go to next array element
// cli();
// /* Enable interrupt on timer2 == 127, with clk/8 prescaler. At 16MHz,
// this gives a timer interrupt at 15625Hz. */
// TIMSK3 = (1 << OCIE3A);
// /* clear/reset timer on match */
// // TCCR3A = 1<<WGM31 | 0<<WGM30; CTC mode, reset on match
// // TCCR3B = 0<<CS32 | 1<<CS31 | 0<<CS30; /* clk, /8 prescaler */
// TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
// TCCR3B = (0 << WGM33) | (0 << WGM32) | (0 << CS32) | (0 << CS31) | (1 << CS30);
// TCCR1A = (1 << COM1A1) | (0 << COM1A0) | (1 << WGM11) | (0 << WGM10);
// TCCR1B = (1 << WGM12) | (0 << CS12) | (0 << CS11) | (1 << CS10);
// // SPCR = 0x50;
// // SPSR = 0x01;
// DDRC |= (1<<6);
// // ICR3 = 0xFFFF;
// // OCR3A=80;
// PORTC |= (1<<6);
// sei();
}
// #define highByte(c) ((c >> 8) & 0x00FF)
// #define lowByte(c) (c & 0x00FF)
ISR(TIMER3_COMPA_vect) {
if (ICR3 > 0 && !sliding) {
switch (position) {
case 0: {
int duty = (((double)F_CPU) / (frequency));
ICR3 = duty; // Set max to the period
OCR3A = duty >> 1; // Set compare to half the period
break;
}
case 1: {
int duty = (((double)F_CPU) / (frequency*2));
ICR3 = duty; // Set max to the period
OCR3A = duty >> 1; // Set compare to half the period
break;
}
case 2: {
int duty = (((double)F_CPU) / (frequency*3));
ICR3 = duty; // Set max to the period
OCR3A = duty >> 1; // Set compare to half the period
break;
}
}
position = (position + 1) % 3;
}
// /* OCR2A has been cleared, per TCCR2A above */
// // OCR3A = 127;
// // pos1 += incr1;
// // pos2 += incr2;
// // pos3 += incr3;
// // sample = sinewave[highByte(pos1)] + sinewave[highByte(pos2)] + sinewave[highByte(pos3)];
// // OCR3A = sample;
// OCR3A=pgm_read_byte(&sinewave[pos1]);
// pos1++;
// // PORTC &= ~(1<<6);
// /* buffered, 1x gain, active mode */
// // SPDR = highByte(sample) | 0x70;
// // while (!(SPSR & (1<<SPIF)));
// // SPDR = lowByte(sample);
// // while (!(SPSR & (1<<SPIF)));
// // PORTC |= (1<<6);
}
void play_note(double freq, int vol) {
if (freq > 0) {
DDRC |= (1<<6);
TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30);
if (frequency != 0) {
if (frequency < freq) {
for (double f = frequency; f <= freq; f += ((freq - frequency) / 500.0)) {
send_freq(f, vol);
}
} else if (frequency > freq) {
for (double f = frequency; f >= freq; f -= ((frequency - freq) / 500.0)) {
send_freq(f, vol);
}
}
}
send_freq(freq, vol);
frequency = freq;
volume = vol;
frequencies[voices] = frequency;
volumes[voices] = volume;
voices++;
}
// ICR3 = 0xFFFF;
// for (int i = 0; i < 10000; i++) {
// OCR3A = round((sin(i*freq)*.5)+.5)*0xFFFF;
// // _delay_us(50);
// }
// TCCR3A = 0;
// TCCR3B = 0;
}
// void note(int x, float length) {
// DDRC |= (1<<6);
// int t = (int)(440*pow(2,-x/12.0)); // starting note
// for (int y = 0; y < length*1000/t; y++) { // note length
// PORTC |= (1<<6);
// delay_us(t);
// PORTC &= ~(1<<6);
// delay_us(t);
// }
// PORTC &= ~(1<<6);
// }
// void true_note(float x, float y, float length) {
// for (uint32_t i = 0; i < length * 50; i++) {
// uint32_t v = (uint32_t) (round(sin(PI*2*i*640000*pow(2, x/12.0))*.5+1 + sin(PI*2*i*640000*pow(2, y/12.0))*.5+1) / 2 * pow(2, 8));
// for (int u = 0; u < 8; u++) {
// if (v & (1 << u) && !(PORTC&(1<<6)))
// PORTC |= (1<<6);
// else if (PORTC&(1<<6))
// PORTC &= ~(1<<6);
// }
// }
// PORTC &= ~(1<<6);
// }
|
