From 29de37d5c0ea9fc6b5539ce4493c7b10a2a7f33f Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Mon, 11 Jan 2016 16:53:33 -0500 Subject: pwm audio --- quantum/beeps.c | 231 +++++++++++++++++++++++++++++++++++--------------------- 1 file changed, 145 insertions(+), 86 deletions(-) (limited to 'quantum/beeps.c') diff --git a/quantum/beeps.c b/quantum/beeps.c index 8d1f81f210..edcc84aca4 100644 --- a/quantum/beeps.c +++ b/quantum/beeps.c @@ -1,11 +1,20 @@ -#include "beeps.h" +#include +#include #include #include #include #include +#include "beeps.h" +#include "keymap_common.h" +#include "wave.h" + #define PI 3.14159265 +#define SAMPLE_DIVIDER 70 +#define SAMPLE_RATE (2000000.0/SAMPLE_DIVIDER/256) +// Resistor value of 1/ (2 * PI * 10nF * (2000000 hertz / SAMPLE_DIVIDER / 10)) for 10nF cap + void delay_us(int count) { while(count--) { _delay_us(1); @@ -15,7 +24,7 @@ void delay_us(int count) { int voices = 0; double frequency = 0; int volume = 0; -int position = 0; +long position = 0; double frequencies[8] = {0, 0, 0, 0, 0, 0, 0, 0}; int volumes[8] = {0, 0, 0, 0, 0, 0, 0, 0}; @@ -23,6 +32,19 @@ bool sliding = false; #define RANGE 1000 volatile int i=0; //elements of the wave +// uint8_t sine[128]; +// uint8_t tri[128]; +// uint8_t squ[128]; +// uint8_t* sine_start; +// uint8_t* sine_end; +// uint8_t* tri_start; +// uint8_t* tri_end; + +// uint8_t* s_start; +// uint8_t* s_end; +// uint8_t* s_ptr; + + void beeps() { play_notes(); @@ -36,8 +58,7 @@ void send_freq(double freq, int vol) { void stop_all_notes() { voices = 0; - TCCR3A = 0; - TCCR3B = 0; + TIMSK0 &= ~_BV(OCIE0A); frequency = 0; volume = 0; @@ -48,6 +69,7 @@ void stop_all_notes() { } void stop_note(double freq) { + freq = freq / SAMPLE_RATE; for (int i = 7; i >= 0; i--) { if (frequencies[i] == freq) { frequencies[i] = 0; @@ -64,151 +86,176 @@ void stop_note(double freq) { if (voices < 0) voices = 0; if (voices == 0) { - TCCR3A = 0; - TCCR3B = 0; + TIMSK0 &= ~_BV(OCIE0A); frequency = 0; volume = 0; } else { double freq = frequencies[voices - 1]; int vol = volumes[voices - 1]; + double starting_f = frequency; if (frequency < freq) { sliding = true; - for (double f = frequency; f <= freq; f += ((freq - frequency) / 500.0)) { - send_freq(f, vol); + for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 500.0)) { + frequency = f; } sliding = false; } else if (frequency > freq) { sliding = true; - for (double f = frequency; f >= freq; f -= ((frequency - freq) / 500.0)) { - send_freq(f, vol); + for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 500.0)) { + frequency = f; } sliding = false; } - send_freq(freq, vol); + // 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); + // for(int i = 0; i < 128; i++) { + // sine[i] = sin(i * PI / 64) * 128 + 128; + // tri[i] = 256 - abs((i - 64) * 4); + // } + // sine_start = &sine; + // sine_end = &sine + 128; + // tri_start = &tri; + // tri_end = &tri + 128; - // TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30); - // TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (0 << CS31) | (1 << CS30); + // new - // ICR3 = 0xFFFF; - // OCR3A = (int)((float)wave[i]*ICR3/RANGE); //go to next array element + PLLFRQ = _BV(PDIV2); + PLLCSR = _BV(PLLE); + while(!(PLLCSR & _BV(PLOCK))); + PLLFRQ |= _BV(PLLTM0); /* PCK 48MHz */ + + /* Init a fast PWM on Timer4 */ + TCCR4A = _BV(COM4A0) | _BV(PWM4A); /* Clear OC4A on Compare Match */ + TCCR4B = _BV(CS40); /* No prescaling => f = PCK/256 = 187500Hz */ + OCR4A = 0; - // cli(); + /* Enable the OC4A output */ + DDRC |= _BV(PORTC6); - // /* 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<> 8) & 0x00FF) -// #define lowByte(c) (c & 0x00FF) +int max = 0xFF; +float sum = 0; +int value = 128; +float place = 0; -ISR(TIMER3_COMPA_vect) { +ISR(TIMER0_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)]; + // value = *(sine_start+=(long)frequencies[0]); + // OCR4A = value; + // if (sine_start >= sine_end) { + // sine_start = &sine[(sine_start - sine_end) % 128]; + // } -// // OCR3A = sample; + // OCR4A = pgm_read_byte(sine_start); + // // sine_start = &sine[(sine_start - &sine[0] + (int)frequencies[0]) % 128]; + // sine_start += (int)frequencies[0]; + // if (sine_start >= sine_end) { + // sine_start = &sine[(sine_start - sine_end) % 128]; + // } + + // OCR4A = pgm_read_byte(s_ptr); + // s_ptr = s_start + (uint8_t)place; + // OCR4A = pgm_read_byte(s_ptr); + + + // SINE + OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]); + + // SQUARE + // if (((int)place) >= 1024){ + // OCR4A = 0xFF; + // } else { + // OCR4A = 0x00; + // } + + // SAWTOOTH + // OCR4A = (int)place / 4; + + // TRIANGLE + // if (((int)place) >= 1024) { + // OCR4A = (int)place / 2; + // } else { + // OCR4A = 2048 - (int)place / 2; + // } + + place += frequency; + if (place >= SINE_LENGTH) + place -= SINE_LENGTH; + +} -// OCR3A=pgm_read_byte(&sinewave[pos1]); -// pos1++; -// // PORTC &= ~(1<<6); -// /* buffered, 1x gain, active mode */ -// // SPDR = highByte(sample) | 0x70; -// // while (!(SPSR & (1< 0) { - DDRC |= (1<<6); - TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30); - TCCR3B = (1 << WGM33) | (1 << WGM32) | (0 << CS32) | (1 << CS31) | (0 << CS30); + // TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (1 << WGM30); + // TCCR3B = (0 << WGM33) | (1 << WGM32) | (0 << CS32) | (0 << CS31) | (1 << CS30); + // TIMSK3 = 0x0; if (frequency != 0) { + double starting_f = frequency; if (frequency < freq) { - for (double f = frequency; f <= freq; f += ((freq - frequency) / 500.0)) { - send_freq(f, vol); + for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 500.0)) { + frequency = f; } } else if (frequency > freq) { - for (double f = frequency; f >= freq; f -= ((frequency - freq) / 500.0)) { - send_freq(f, vol); + for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 500.0)) { + frequency = f; } } } - send_freq(freq, vol); + // send_freq(freq, vol); frequency = freq; volume = vol; frequencies[voices] = frequency; volumes[voices] = volume; voices++; + // position = 0; + // TCNT0 = 0; } // ICR3 = 0xFFFF; // for (int i = 0; i < 10000; i++) { @@ -218,6 +265,18 @@ void play_note(double freq, int vol) { // TCCR3A = 0; // TCCR3B = 0; + + + TIMSK0 &= ~_BV(OCIE0A) | ~_BV(OCIE0B); + + TCCR0A = _BV(WGM01); + TCCR0B = _BV(CS01); + OCR0A = SAMPLE_DIVIDER - 1; + OCR0B = 1; + + TIMSK0 |= _BV(OCIE0A); + // sei(); + } // void note(int x, float length) { -- cgit v1.2.3 From 0f867796de6f24a202463e125c1b4bc961621bf7 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Mon, 11 Jan 2016 17:52:35 -0500 Subject: timer 3 --- quantum/beeps.c | 151 ++++---------------------------------------------------- 1 file changed, 9 insertions(+), 142 deletions(-) (limited to 'quantum/beeps.c') diff --git a/quantum/beeps.c b/quantum/beeps.c index edcc84aca4..08b35abbd8 100644 --- a/quantum/beeps.c +++ b/quantum/beeps.c @@ -32,33 +32,9 @@ bool sliding = false; #define RANGE 1000 volatile int i=0; //elements of the wave -// uint8_t sine[128]; -// uint8_t tri[128]; -// uint8_t squ[128]; -// uint8_t* sine_start; -// uint8_t* sine_end; -// uint8_t* tri_start; -// uint8_t* tri_end; - -// uint8_t* s_start; -// uint8_t* s_end; -// uint8_t* s_ptr; - - - -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; - TIMSK0 &= ~_BV(OCIE0A); + TIMSK3 &= ~_BV(OCIE3A); frequency = 0; volume = 0; @@ -86,7 +62,7 @@ void stop_note(double freq) { if (voices < 0) voices = 0; if (voices == 0) { - TIMSK0 &= ~_BV(OCIE0A); + TIMSK3 &= ~_BV(OCIE3A); frequency = 0; volume = 0; } else { @@ -106,7 +82,6 @@ void stop_note(double freq) { } sliding = false; } - // send_freq(freq, vol); frequency = freq; volume = vol; } @@ -114,18 +89,6 @@ void stop_note(double freq) { void init_notes() { - // for(int i = 0; i < 128; i++) { - // sine[i] = sin(i * PI / 64) * 128 + 128; - // tri[i] = 256 - abs((i - 64) * 4); - // } - // sine_start = &sine; - // sine_end = &sine + 128; - // tri_start = &tri; - // tri_end = &tri + 128; - - // new - - PLLFRQ = _BV(PDIV2); PLLCSR = _BV(PLLE); while(!(PLLCSR & _BV(PLOCK))); @@ -139,28 +102,6 @@ void init_notes() { /* Enable the OC4A output */ DDRC |= _BV(PORTC6); - - - /* First disable the timer overflow interrupt while we're configuring */ - // TIMSK0 &= ~(1<= sine_end) { - // sine_start = &sine[(sine_start - sine_end) % 128]; - // } - - - // OCR4A = pgm_read_byte(sine_start); - // // sine_start = &sine[(sine_start - &sine[0] + (int)frequencies[0]) % 128]; - // sine_start += (int)frequencies[0]; - // if (sine_start >= sine_end) { - // sine_start = &sine[(sine_start - sine_end) % 128]; - // } - - // OCR4A = pgm_read_byte(s_ptr); - // s_ptr = s_start + (uint8_t)place; - // OCR4A = pgm_read_byte(s_ptr); - +ISR(TIMER3_COMPA_vect) { // SINE OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]); @@ -217,24 +137,10 @@ ISR(TIMER0_COMPA_vect) { } - -ISR(TIMER0_COMPB_vect) -{ - - /* Disable the interrupt */ - TIMSK0 &= ~_BV(OCIE0B); - -} - void play_note(double freq, int vol) { freq = freq / SAMPLE_RATE; if (freq > 0) { - - // TCCR3A = (1 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (1 << WGM30); - // TCCR3B = (0 << WGM33) | (1 << WGM32) | (0 << CS32) | (0 << CS31) | (1 << CS30); - - // TIMSK3 = 0x0; if (frequency != 0) { double starting_f = frequency; if (frequency < freq) { @@ -247,59 +153,20 @@ void play_note(double freq, int vol) { } } } - // send_freq(freq, vol); frequency = freq; volume = vol; frequencies[voices] = frequency; volumes[voices] = volume; voices++; - // position = 0; - // TCNT0 = 0; } - // ICR3 = 0xFFFF; - // for (int i = 0; i < 10000; i++) { - // OCR3A = round((sin(i*freq)*.5)+.5)*0xFFFF; - // // _delay_us(50); - // } - // TCCR3A = 0; - // TCCR3B = 0; + TIMSK3 &= ~_BV(OCIE3A); + TCCR3A = 0x0; + TCCR3B = _BV(CS31) | _BV(WGM32); + OCR3A = SAMPLE_DIVIDER - 1; - TIMSK0 &= ~_BV(OCIE0A) | ~_BV(OCIE0B); - - TCCR0A = _BV(WGM01); - TCCR0B = _BV(CS01); - OCR0A = SAMPLE_DIVIDER - 1; - OCR0B = 1; - - TIMSK0 |= _BV(OCIE0A); - // sei(); - -} - -// 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); -// } + TIMSK3 |= _BV(OCIE3A); -// 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 +} \ No newline at end of file -- cgit v1.2.3 From 4c100dbbef5b97290cbe6d4846575a940649c958 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Wed, 13 Jan 2016 00:25:31 -0500 Subject: note seq, start-up beeps, function beeps --- quantum/beeps.c | 147 +++++++++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 120 insertions(+), 27 deletions(-) (limited to 'quantum/beeps.c') diff --git a/quantum/beeps.c b/quantum/beeps.c index 08b35abbd8..7586ebc522 100644 --- a/quantum/beeps.c +++ b/quantum/beeps.c @@ -11,8 +11,8 @@ #define PI 3.14159265 -#define SAMPLE_DIVIDER 70 -#define SAMPLE_RATE (2000000.0/SAMPLE_DIVIDER/256) +#define SAMPLE_DIVIDER 39 +#define SAMPLE_RATE (2000000.0/SAMPLE_DIVIDER/2048) // Resistor value of 1/ (2 * PI * 10nF * (2000000 hertz / SAMPLE_DIVIDER / 10)) for 10nF cap void delay_us(int count) { @@ -32,9 +32,31 @@ bool sliding = false; #define RANGE 1000 volatile int i=0; //elements of the wave +int max = 0xFF; +float sum = 0; +int value = 128; +float place = 0; + +uint16_t place_int = 0; +bool repeat = true; +uint8_t * sample; +uint16_t sample_length = 0; + + +bool notes = false; +float note_frequency = 0; +float note_length = 0; +uint16_t note_position = 0; +float (* notes_pointer)[][2]; +uint8_t notes_length; +bool notes_repeat; +uint8_t current_note = 0; + void stop_all_notes() { voices = 0; TIMSK3 &= ~_BV(OCIE3A); + notes = false; + playing_notes = false; frequency = 0; volume = 0; @@ -89,30 +111,35 @@ void stop_note(double freq) { void init_notes() { - PLLFRQ = _BV(PDIV2); - PLLCSR = _BV(PLLE); - while(!(PLLCSR & _BV(PLOCK))); - PLLFRQ |= _BV(PLLTM0); /* PCK 48MHz */ - - /* Init a fast PWM on Timer4 */ - TCCR4A = _BV(COM4A0) | _BV(PWM4A); /* Clear OC4A on Compare Match */ - TCCR4B = _BV(CS40); /* No prescaling => f = PCK/256 = 187500Hz */ - OCR4A = 0; + PLLFRQ = _BV(PDIV2); + PLLCSR = _BV(PLLE); + while(!(PLLCSR & _BV(PLOCK))); + PLLFRQ |= _BV(PLLTM0); /* PCK 48MHz */ + + /* Init a fast PWM on Timer4 */ + TCCR4A = _BV(COM4A0) | _BV(PWM4A); /* Clear OC4A on Compare Match */ + TCCR4B = _BV(CS40); /* No prescaling => f = PCK/256 = 187500Hz */ + OCR4A = 0; + + /* Enable the OC4A output */ + DDRC |= _BV(PORTC6); + + TIMSK3 &= ~_BV(OCIE3A); // Turn off 3A interputs + + TCCR3A = 0x0; // Options not needed + TCCR3B = _BV(CS31) | _BV(CS30) | _BV(WGM32); // 64th prescaling and CTC + OCR3A = SAMPLE_DIVIDER - 1; // Correct count/compare, related to sample playback - /* Enable the OC4A output */ - DDRC |= _BV(PORTC6); + playing_notes = false; } -int max = 0xFF; -float sum = 0; -int value = 128; -float place = 0; ISR(TIMER3_COMPA_vect) { + // SINE - OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]); + // OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]); // SQUARE // if (((int)place) >= 1024){ @@ -131,12 +158,84 @@ ISR(TIMER3_COMPA_vect) { // OCR4A = 2048 - (int)place / 2; // } - place += frequency; - if (place >= SINE_LENGTH) - place -= SINE_LENGTH; + // place += frequency; + + // if (place >= SINE_LENGTH) + // if (repeat) + // place -= SINE_LENGTH; + // else + // TIMSK3 &= ~_BV(OCIE3A); + + // SAMPLE + // OCR4A = pgm_read_byte(&sample[(uint16_t)place_int]); + + // place_int++; + + // if (place_int >= sample_length) + // if (repeat) + // place_int -= sample_length; + // else + // TIMSK3 &= ~_BV(OCIE3A); + + + if (notes) { + OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]) >> 0; + + place += note_frequency; + if (place >= SINE_LENGTH) + place -= SINE_LENGTH; + note_position++; + if (note_position >= note_length) { + current_note++; + if (current_note >= notes_length) { + if (notes_repeat) { + current_note = 0; + } else { + TIMSK3 &= ~_BV(OCIE3A); + notes = false; + playing_notes = false; + return; + } + } + note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE; + note_length = (*notes_pointer)[current_note][1]; + note_position = 0; + } + + } } +void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat) { + notes = true; + + notes_pointer = np; + notes_length = n_length; + notes_repeat = n_repeat; + + place = 0; + current_note = 0; + note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE; + note_length = (*notes_pointer)[current_note][1]; + // note_frequency = 880.0 / SAMPLE_RATE; + // note_length = 1000; + note_position = 0; + + + TIMSK3 |= _BV(OCIE3A); + playing_notes = true; +} + +void play_sample(uint8_t * s, uint16_t l, bool r) { + place_int = 0; + sample = s; + sample_length = l; + repeat = r; + + TIMSK3 |= _BV(OCIE3A); + playing_notes = true; +} + void play_note(double freq, int vol) { freq = freq / SAMPLE_RATE; @@ -161,12 +260,6 @@ void play_note(double freq, int vol) { voices++; } - TIMSK3 &= ~_BV(OCIE3A); - - TCCR3A = 0x0; - TCCR3B = _BV(CS31) | _BV(WGM32); - OCR3A = SAMPLE_DIVIDER - 1; - TIMSK3 |= _BV(OCIE3A); } \ No newline at end of file -- cgit v1.2.3 From eb61700912f1713ba27d34c23d7f07be66ee6513 Mon Sep 17 00:00:00 2001 From: Jack Humbert Date: Wed, 20 Jan 2016 00:06:52 -0500 Subject: better integrations --- quantum/beeps.c | 265 -------------------------------------------------------- 1 file changed, 265 deletions(-) delete mode 100644 quantum/beeps.c (limited to 'quantum/beeps.c') diff --git a/quantum/beeps.c b/quantum/beeps.c deleted file mode 100644 index 7586ebc522..0000000000 --- a/quantum/beeps.c +++ /dev/null @@ -1,265 +0,0 @@ -#include -#include -#include -#include -#include -#include - -#include "beeps.h" -#include "keymap_common.h" -#include "wave.h" - -#define PI 3.14159265 - -#define SAMPLE_DIVIDER 39 -#define SAMPLE_RATE (2000000.0/SAMPLE_DIVIDER/2048) -// Resistor value of 1/ (2 * PI * 10nF * (2000000 hertz / SAMPLE_DIVIDER / 10)) for 10nF cap - -void delay_us(int count) { - while(count--) { - _delay_us(1); - } -} - -int voices = 0; -double frequency = 0; -int volume = 0; -long 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 - -int max = 0xFF; -float sum = 0; -int value = 128; -float place = 0; - -uint16_t place_int = 0; -bool repeat = true; -uint8_t * sample; -uint16_t sample_length = 0; - - -bool notes = false; -float note_frequency = 0; -float note_length = 0; -uint16_t note_position = 0; -float (* notes_pointer)[][2]; -uint8_t notes_length; -bool notes_repeat; -uint8_t current_note = 0; - -void stop_all_notes() { - voices = 0; - TIMSK3 &= ~_BV(OCIE3A); - notes = false; - playing_notes = false; - frequency = 0; - volume = 0; - - for (int i = 0; i < 8; i++) { - frequencies[i] = 0; - volumes[i] = 0; - } -} - -void stop_note(double freq) { - freq = freq / SAMPLE_RATE; - 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) { - TIMSK3 &= ~_BV(OCIE3A); - frequency = 0; - volume = 0; - } else { - double freq = frequencies[voices - 1]; - int vol = volumes[voices - 1]; - double starting_f = frequency; - if (frequency < freq) { - sliding = true; - for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 500.0)) { - frequency = f; - } - sliding = false; - } else if (frequency > freq) { - sliding = true; - for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 500.0)) { - frequency = f; - } - sliding = false; - } - frequency = freq; - volume = vol; - } -} - -void init_notes() { - - PLLFRQ = _BV(PDIV2); - PLLCSR = _BV(PLLE); - while(!(PLLCSR & _BV(PLOCK))); - PLLFRQ |= _BV(PLLTM0); /* PCK 48MHz */ - - /* Init a fast PWM on Timer4 */ - TCCR4A = _BV(COM4A0) | _BV(PWM4A); /* Clear OC4A on Compare Match */ - TCCR4B = _BV(CS40); /* No prescaling => f = PCK/256 = 187500Hz */ - OCR4A = 0; - - /* Enable the OC4A output */ - DDRC |= _BV(PORTC6); - - TIMSK3 &= ~_BV(OCIE3A); // Turn off 3A interputs - - TCCR3A = 0x0; // Options not needed - TCCR3B = _BV(CS31) | _BV(CS30) | _BV(WGM32); // 64th prescaling and CTC - OCR3A = SAMPLE_DIVIDER - 1; // Correct count/compare, related to sample playback - - playing_notes = false; - -} - - -ISR(TIMER3_COMPA_vect) { - - - // SINE - // OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]); - - // SQUARE - // if (((int)place) >= 1024){ - // OCR4A = 0xFF; - // } else { - // OCR4A = 0x00; - // } - - // SAWTOOTH - // OCR4A = (int)place / 4; - - // TRIANGLE - // if (((int)place) >= 1024) { - // OCR4A = (int)place / 2; - // } else { - // OCR4A = 2048 - (int)place / 2; - // } - - // place += frequency; - - // if (place >= SINE_LENGTH) - // if (repeat) - // place -= SINE_LENGTH; - // else - // TIMSK3 &= ~_BV(OCIE3A); - - // SAMPLE - // OCR4A = pgm_read_byte(&sample[(uint16_t)place_int]); - - // place_int++; - - // if (place_int >= sample_length) - // if (repeat) - // place_int -= sample_length; - // else - // TIMSK3 &= ~_BV(OCIE3A); - - - if (notes) { - OCR4A = pgm_read_byte(&sinewave[(uint16_t)place]) >> 0; - - place += note_frequency; - if (place >= SINE_LENGTH) - place -= SINE_LENGTH; - note_position++; - if (note_position >= note_length) { - current_note++; - if (current_note >= notes_length) { - if (notes_repeat) { - current_note = 0; - } else { - TIMSK3 &= ~_BV(OCIE3A); - notes = false; - playing_notes = false; - return; - } - } - note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE; - note_length = (*notes_pointer)[current_note][1]; - note_position = 0; - } - - } - -} - -void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat) { - notes = true; - - notes_pointer = np; - notes_length = n_length; - notes_repeat = n_repeat; - - place = 0; - current_note = 0; - note_frequency = (*notes_pointer)[current_note][0] / SAMPLE_RATE; - note_length = (*notes_pointer)[current_note][1]; - // note_frequency = 880.0 / SAMPLE_RATE; - // note_length = 1000; - note_position = 0; - - - TIMSK3 |= _BV(OCIE3A); - playing_notes = true; -} - -void play_sample(uint8_t * s, uint16_t l, bool r) { - place_int = 0; - sample = s; - sample_length = l; - repeat = r; - - TIMSK3 |= _BV(OCIE3A); - playing_notes = true; -} - -void play_note(double freq, int vol) { - - freq = freq / SAMPLE_RATE; - if (freq > 0) { - if (frequency != 0) { - double starting_f = frequency; - if (frequency < freq) { - for (double f = starting_f; f <= freq; f += ((freq - starting_f) / 500.0)) { - frequency = f; - } - } else if (frequency > freq) { - for (double f = starting_f; f >= freq; f -= ((starting_f - freq) / 500.0)) { - frequency = f; - } - } - } - frequency = freq; - volume = vol; - - frequencies[voices] = frequency; - volumes[voices] = volume; - voices++; - } - - TIMSK3 |= _BV(OCIE3A); - -} \ No newline at end of file -- cgit v1.2.3