125 lines
2.2 KiB
C++
125 lines
2.2 KiB
C++
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#include <Arduino.h>
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#include "timing.hpp"
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#include "scheduler.hpp"
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#include "data.hpp"
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#include "entry.hpp"
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#include "tones.hpp"
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#include "util.hpp"
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static uint32_t ts_init = 0;
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static uint32_t ts_last = 0;
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struct {
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uint8_t amplitude = 1;
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uint32_t us_per_tick = 1;
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} config;
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struct {
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uint8_t index;
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uint8_t amplitude;
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uint16_t frequency;
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bool active = false;
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} next;
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constexpr uint64_t bm(int n) {
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return ((uint64_t)1 << n) - 1;
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}
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void scheduler::init() {
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data::jump(0);
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tones::clear_all();
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ts_init = micros();
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running = true;
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}
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void scheduler::do_next() {
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int i = 1;
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if(running) {
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if(next.active) {
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tones::set(next.index, next.frequency, next.amplitude);
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next.active = false;
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}
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} else {
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init();
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}
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uint64_t v = 0;
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uint8_t buff[8];
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data::read(buff, 1);
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entry::Type type = buff[0] >> 5;
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int entry_size = entry::get_size(type);
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data::read(buff + 1, entry_size - 1);
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for(int i = 0; i < entry_size; i++) {
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v = (v << 8) | buff[i];
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}
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switch(type) {
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case entry::Type::config: {
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config.amplitude = v & bm(8);
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v >>= 8;
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config.us_per_tick = v & bm(29);
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ts_init = micros();
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break;
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}
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case entry::Type::set: {
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v >>= 4;
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next.frequency = v & bm(12);
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v >>= 12;
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next.index = v & bm(5);
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next.amplitude = config.amplitude;
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next.active = true;
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break;
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}
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case entry::Type::set_ts: {
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next.frequency = v & bm(12);
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v >>= 12;
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uint32_t ticks = v & bm(20);
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v >>= 20;
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next.index = v & bm(5);
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next.amplitude = config.amplitude;
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next.active = true;
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timestamp = ticks * config.us_per_tick + ts_init;
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break;
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}
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case entry::Type::clear: {
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next.index = v & bm(5);
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next.frequency = 0;
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next.amplitude = 0;
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next.active = true;
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break;
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}
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case entry::Type::clear_ts: {
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v >>= 4;
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uint32_t ticks = v & bm(20);
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v >>= 20;
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next.index = v & bm(5);
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next.frequency = 0;
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next.amplitude = 0;
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next.active = true;
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timestamp = ticks * config.us_per_tick + ts_init;
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break;
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}
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default: {
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running = false;
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tones::clear_all();
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break;
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}
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}
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}
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void scheduler::do_all() {
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while(running && timing::at >= timestamp) {
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do_next();
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}
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tones::recalc();
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}
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void scheduler::clear() {
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data::jump(0);
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ts_last = 0;
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}
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