drashna/qmk_firmware
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note seq, start-up beeps, function beeps

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This commit is contained in:
Jack Humbert 2016-01-13 00:25:31 -05:00
parent 263344d42f
commit 4c100dbbef
3 changed files with 183 additions and 46 deletions
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147
quantum/beeps.c
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@ -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 */
/* Enable the OC4A output */
DDRC |= _BV(PORTC6);
/* 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;
}
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){
@ -131,10 +158,82 @@ 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) {
@ -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);
}

9
quantum/beeps.h
View file

@ -3,10 +3,13 @@
#include <avr/io.h>
#include <util/delay.h>
void note(int x, float length);
void beeps();
void true_note(float x, float y, float length);
bool playing_notes;
void play_sample(uint8_t * s, uint16_t l, bool r);
void play_note(double freq, int vol);
void stop_note(double freq);
void stop_all_notes();
void init_notes();
void play_notes(float (*np)[][2], uint8_t n_length, bool n_repeat);