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@ -5,7 +5,6 @@ |
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#include <avr/io.h> |
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#define PI 3.14159265 |
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#define CHANNEL OCR1C |
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void delay_us(int count) { |
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while(count--) { |
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@ -16,91 +15,17 @@ void delay_us(int count) { |
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int voices = 0; |
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double frequency = 0; |
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int volume = 0; |
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int position = 0; |
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double frequencies[8] = {0, 0, 0, 0, 0, 0, 0, 0}; |
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int volumes[8] = {0, 0, 0, 0, 0, 0, 0, 0}; |
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void beeps() { |
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// DDRB |= (1<<7); |
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// PORTB &= ~(1<<7); |
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// // Use full 16-bit resolution. |
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// ICR1 = 0xFFFF; |
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// // I could write a wall of text here to explain... but TL;DW |
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// // Go read the ATmega32u4 datasheet. |
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// // And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on |
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// // Pin PB7 = OCR1C (Timer 1, Channel C) |
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// // Compare Output Mode = Clear on compare match, Channel C = COM1C1=1 COM1C0=0 |
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// // (i.e. start high, go low when counter matches.) |
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// // WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0 |
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// // Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1 |
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// TCCR1A = _BV(COM1C1) | _BV(WGM11); // = 0b00001010; |
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// TCCR1B = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001; |
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// // Turn off PWM control on PB7, revert to output low. |
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// // TCCR1A &= ~(_BV(COM1C1)); |
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// // CHANNEL = ((1 << level) - 1); |
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// // Turn on PWM control of PB7 |
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// TCCR1A |= _BV(COM1C1); |
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// // CHANNEL = level << OFFSET | 0x0FFF; |
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// // CHANNEL = 0b1010101010101010; |
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// float x = 12; |
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// float y = 24; |
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// float length = 50; |
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// float scale = 1; |
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// // int f1 = 1000000/440; |
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// // int f2 = 1000000/880; |
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// // for (uint32_t i = 0; i < length * 1000; i++) { |
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// // // int frequency = 1/((sin(PI*2*i*scale*pow(2, x/12.0))*.5+1 + sin(PI*2*i*scale*pow(2, y/12.0))*.5+1) / 2); |
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// // ICR1 = f1; // Set max to the period |
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// // OCR1C = f1 >> 1; // Set compare to half the period |
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// // // _delay_us(10); |
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// // } |
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// int frequency = 1000000/440; |
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// ICR1 = frequency; // Set max to the period |
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// OCR1C = frequency >> 1; // Set compare to half the period |
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// _delay_us(500000); |
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// TCCR1A &= ~(_BV(COM1C1)); |
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// CHANNEL = 0; |
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play_notes(); |
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// play_note(55*pow(2, 0/12.0), 1); |
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// play_note(55*pow(2, 12/12.0), 1); |
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// play_note(55*pow(2, 24/12.0), 1); |
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// play_note(55*pow(2, 0/12.0), 1); |
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// play_note(55*pow(2, 12/12.0), 1); |
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// play_note(55*pow(2, 24/12.0), 1); |
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// play_note(0, 4); |
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// play_note(55*pow(2, 0/12.0), 8); |
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// play_note(55*pow(2, 12/12.0), 4); |
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// play_note(55*pow(2, 10/12.0), 4); |
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// play_note(55*pow(2, 12/12.0), 8); |
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// play_note(55*pow(2, 10/12.0), 4); |
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// play_note(55*pow(2, 7/12.0), 2); |
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// play_note(55*pow(2, 8/12.0), 2); |
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// play_note(55*pow(2, 7/12.0), 16); |
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// play_note(0, 4); |
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// play_note(55*pow(2, 3/12.0), 8); |
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// play_note(55*pow(2, 5/12.0), 4); |
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// play_note(55*pow(2, 7/12.0), 4); |
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// play_note(55*pow(2, 7/12.0), 8); |
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// play_note(55*pow(2, 5/12.0), 4); |
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// play_note(55*pow(2, 3/12.0), 4); |
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// play_note(55*pow(2, 2/12.0), 16); |
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bool sliding = false; |
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#define RANGE 1000 |
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volatile int i=0; //elements of the wave |
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void beeps() { |
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play_notes(); |
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} |
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void send_freq(double freq, int vol) { |
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@ -114,6 +39,7 @@ void stop_all_notes() { |
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TCCR3A = 0; |
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TCCR3B = 0; |
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frequency = 0; |
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volume = 0; |
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for (int i = 0; i < 8; i++) { |
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frequencies[i] = 0; |
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@ -135,21 +61,28 @@ void stop_note(double freq) { |
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} |
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} |
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voices--; |
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if (voices < 0) |
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voices = 0; |
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if (voices == 0) { |
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TCCR3A = 0; |
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TCCR3B = 0; |
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frequency = 0; |
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volume = 0; |
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} else { |
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double freq = frequencies[voices - 1]; |
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int vol = volumes[voices - 1]; |
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if (frequency < freq) { |
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sliding = true; |
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for (double f = frequency; f <= freq; f += ((freq - frequency) / 500.0)) { |
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send_freq(f, vol); |
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} |
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sliding = false; |
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} else if (frequency > freq) { |
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sliding = true; |
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for (double f = frequency; f >= freq; f -= ((frequency - freq) / 500.0)) { |
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send_freq(f, vol); |
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} |
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sliding = false; |
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} |
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send_freq(freq, vol); |
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frequency = freq; |
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@ -157,6 +90,115 @@ void stop_note(double freq) { |
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} |
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} |
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void init_notes() { |
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// TCCR1A = (1 << COM1A1) | (0 << COM1A0) | (1 << WGM11) | (1 << WGM10); |
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// TCCR1B = (1 << COM1B1) | (0 << COM1A0) | (1 << WGM13) | (1 << WGM12) | (0 << CS12) | (0 << CS11) | (1 << CS10); |
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// DDRC |= (1<<6); |
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// TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30); |
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// TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (0 << CS31) | (1 << CS30); |
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// ICR3 = 0xFFFF; |
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// OCR3A = (int)((float)wave[i]*ICR3/RANGE); //go to next array element |
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// cli(); |
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// /* Enable interrupt on timer2 == 127, with clk/8 prescaler. At 16MHz, |
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// this gives a timer interrupt at 15625Hz. */ |
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// TIMSK3 = (1 << OCIE3A); |
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// /* clear/reset timer on match */ |
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// // TCCR3A = 1<<WGM31 | 0<<WGM30; CTC mode, reset on match |
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// // TCCR3B = 0<<CS32 | 1<<CS31 | 0<<CS30; /* clk, /8 prescaler */ |
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// TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30); |
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// TCCR3B = (0 << WGM33) | (0 << WGM32) | (0 << CS32) | (0 << CS31) | (1 << CS30); |
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// TCCR1A = (1 << COM1A1) | (0 << COM1A0) | (1 << WGM11) | (0 << WGM10); |
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// TCCR1B = (1 << WGM12) | (0 << CS12) | (0 << CS11) | (1 << CS10); |
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// // SPCR = 0x50; |
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// // SPSR = 0x01; |
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// DDRC |= (1<<6); |
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// // ICR3 = 0xFFFF; |
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// // OCR3A=80; |
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// PORTC |= (1<<6); |
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// sei(); |
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} |
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// #define highByte(c) ((c >> 8) & 0x00FF) |
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// #define lowByte(c) (c & 0x00FF) |
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ISR(TIMER3_COMPA_vect) { |
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if (ICR3 > 0 && !sliding) { |
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switch (position) { |
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case 0: { |
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int duty = (((double)F_CPU) / (frequency)); |
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ICR3 = duty; // Set max to the period |
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OCR3A = duty >> 1; // Set compare to half the period |
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break; |
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} |
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case 1: { |
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int duty = (((double)F_CPU) / (frequency*2)); |
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ICR3 = duty; // Set max to the period |
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OCR3A = duty >> 1; // Set compare to half the period |
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break; |
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} |
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case 2: { |
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int duty = (((double)F_CPU) / (frequency*3)); |
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ICR3 = duty; // Set max to the period |
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OCR3A = duty >> 1; // Set compare to half the period |
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break; |
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} |
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} |
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position = (position + 1) % 3; |
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} |
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// /* OCR2A has been cleared, per TCCR2A above */ |
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// // OCR3A = 127; |
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// // pos1 += incr1; |
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// // pos2 += incr2; |
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// // pos3 += incr3; |
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// // sample = sinewave[highByte(pos1)] + sinewave[highByte(pos2)] + sinewave[highByte(pos3)]; |
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// // OCR3A = sample; |
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// OCR3A=pgm_read_byte(&sinewave[pos1]); |
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// pos1++; |
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// // PORTC &= ~(1<<6); |
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// /* buffered, 1x gain, active mode */ |
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// // SPDR = highByte(sample) | 0x70; |
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// // while (!(SPSR & (1<<SPIF))); |
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// // SPDR = lowByte(sample); |
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// // while (!(SPSR & (1<<SPIF))); |
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// // PORTC |= (1<<6); |
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} |
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void loop() { |
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} |
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// ISR(TIMER1_COMPA_vect) |
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// { |
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// // if (i<(sizeof(wave)/sizeof(int))) //don't exceed ends of vector... sizeof(wave) |
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// if (i<pow(2, 10)) //don't exceed ends of vector... sizeof(wave) |
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// { |
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// OCR3A = (int)((float)wave[i]*ICR3/RANGE); //go to next array element |
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// // int x = 1; |
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// // int y = 5; |
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// // OCR3A = (int) (round(sin(i*440*pow(2, x/12.0))*.5+.5 + sin(i*440*pow(2, y/12.0))*.5+.5) / 2 * ICR3); |
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// i++; //increment |
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// } |
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// else i=0; //reset |
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// } |
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void play_note(double freq, int vol) { |
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if (freq > 0) { |
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