mirror of
https://github.com/openstenoproject/qmk
synced 2024-11-10 18:49:08 +00:00
305 lines
No EOL
7.1 KiB
C
305 lines
No EOL
7.1 KiB
C
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
#include <avr/pgmspace.h>
|
|
#include <avr/interrupt.h>
|
|
#include <avr/io.h>
|
|
|
|
#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);
|
|
}
|
|
}
|
|
|
|
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
|
|
|
|
// 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);
|
|
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) {
|
|
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 = 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;
|
|
}
|
|
// send_freq(freq, vol);
|
|
frequency = freq;
|
|
volume = vol;
|
|
}
|
|
}
|
|
|
|
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)));
|
|
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);
|
|
|
|
|
|
|
|
/* First disable the timer overflow interrupt while we're configuring */
|
|
// TIMSK0 &= ~(1<<TOIE0);
|
|
|
|
// /* Configure timer4 in normal mode (pure counting, no PWM etc.) */
|
|
// TCCR0A &= ~((1<<WGM01) | (1<<WGM00));
|
|
// TCCR0B &= ~(1<<WGM02);
|
|
|
|
// /* Disable Compare Match A interrupt enable (only want overflow) */
|
|
// TIMSK0 &= ~(1<<OCIE0A);
|
|
|
|
// TCCR0B |= (1<<CS01); // Set bits
|
|
// TCCR0B &= ~(1<<CS00) | ~(1<<CS02); // Clear bit
|
|
|
|
// /* Save value globally for later reload in ISR */
|
|
// tcnt0 = 45 - 1;
|
|
|
|
// /* Finally load end enable the timer */
|
|
// TCNT0 = tcnt0;
|
|
// TIMSK0 |= (1<<TOIE0);
|
|
|
|
}
|
|
|
|
int max = 0xFF;
|
|
float sum = 0;
|
|
int value = 128;
|
|
float place = 0;
|
|
|
|
ISR(TIMER0_COMPA_vect) {
|
|
|
|
|
|
|
|
// value = *(sine_start+=(long)frequencies[0]);
|
|
// OCR4A = value;
|
|
// if (sine_start >= 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);
|
|
|
|
|
|
// 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;
|
|
|
|
}
|
|
|
|
|
|
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) {
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
// 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;
|
|
|
|
|
|
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);
|
|
// }
|
|
|
|
// 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);
|
|
// }
|