tone-generator/entry.hpp

#pragma once

template <int P, bool v>
struct Checker {
    static constexpr bool value = v;
};

namespace entry {

	enum Type : uint8_t {
		stop,
		config,
		set,
		set_ts,
		clear,
		clear_ts,
	};

	struct Set {
		uint8_t index;
		uint16_t frequency;
	};
	
	struct Clear {
		uint8_t index;
	};
	
	struct SetTS {
		uint8_t index;
		uint32_t ticks;
		uint16_t frequency;
	};
	
	struct ClearTS {
		uint8_t index;
		uint32_t ticks;
	};

	struct Stop {
	};

	struct Config {
		uint32_t us_per_tick;
		float amplitude;
	};

	struct Generic {
		Type type;
		union {
			Set set;
			SetTS set_ts;
			Clear clear;
			ClearTS clear_ts;
			Stop stop;
			Config config;
		};
	};

	inline size_t get_size(Type type) {
		switch(type) {
		case Type::set:
			return 3;
		case Type::clear:
			return 1;
		case Type::set_ts:
			return 5;
		case Type::clear_ts:
			return 4;
		case Type::config:
			return 8;
		case Type::stop:
		default:
			return 1;
		}
	}
};