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-rw-r--r--quantum/beeps.c246
1 files changed, 246 insertions, 0 deletions
diff --git a/quantum/beeps.c b/quantum/beeps.c
new file mode 100644
index 0000000000..8d1f81f210
--- /dev/null
+++ b/quantum/beeps.c
@@ -0,0 +1,246 @@
+#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);
+// } \ No newline at end of file
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