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118 lines
3.1 KiB
118 lines
3.1 KiB
/*
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TUYA MODULE
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Copyright (C) 2019 by Maxim Prokhorov <prokhorov dot max at outlook dot com>
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*/
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#pragma once
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#include <cstdint>
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#include "tuya_dataframe.h"
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#include "tuya_types.h"
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#include "tuya_transport.h"
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namespace Tuya {
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// 2 known Data Protocols:
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//
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// id type len value
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// 0x?? 0x01 0x00 0x01 0x00 - bool (0 for false, 1 for true)
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// 0x?? 0x02 0x00 0x04 0x00 0x00 0x00 0x00 - int
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//
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// Note: 'id' varies between devices. instead, matching DP in sequence with local controllers
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// Note: 'int' type is mostly used for dimmer and while it is 4 byte value,
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// only the first byte is used (i.e. value is between 0 and 255)
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Type dataType(const DataFrame& frame) {
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if (!frame.length) return Type::UNKNOWN;
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const Type type = static_cast<Type>(frame[1]);
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switch (type) {
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case Type::BOOL:
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if (frame.length != 5) break;
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if (frame[3] != 0x01) break;
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return type;
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case Type::INT:
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if (frame.length != 8) break;
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if (frame[3] != 0x04) break;
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return type;
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default:
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return Type::UNKNOWN;
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}
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return Type::UNKNOWN;
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}
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// Since we know of the type only at runtime, specialize the protocol container
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template <typename T>
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class DataProtocol {
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public:
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DataProtocol(const uint8_t id, const T value) :
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_id(id), _value(value)
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{}
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DataProtocol(const DataFrame& frame);
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uint8_t id() const { return _id; }
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T value() const { return _value; }
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std::vector<uint8_t> serialize();
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private:
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uint8_t _id;
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T _value;
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};
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template <typename T>
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DataProtocol<T>::DataProtocol(const DataFrame& frame) {
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static_assert(sizeof(T) != sizeof(T), "No constructor yet for this type!");
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}
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template <>
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DataProtocol<bool>::DataProtocol(const DataFrame& frame) {
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auto data = frame.cbegin();
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_id = data[0],
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_value = data[4];
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}
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template <>
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DataProtocol<uint32_t>::DataProtocol(const DataFrame& frame) {
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auto data = frame.cbegin();
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_id = data[0];
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_value = static_cast<uint32_t>(data[4] << 24)
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| static_cast<uint32_t>(data[5] << 16)
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| static_cast<uint32_t>(data[6] << 8)
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| static_cast<uint32_t>(data[7]);
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}
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template <>
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std::vector<uint8_t> DataProtocol<bool>::serialize() {
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return std::vector<uint8_t> {
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_id, static_cast<uint8_t>(Type::BOOL), 0x00, 0x01,
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static_cast<uint8_t>(_value)
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};
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}
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template <>
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std::vector<uint8_t> DataProtocol<uint32_t>::serialize() {
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return std::vector<uint8_t> {
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_id, static_cast<uint8_t>(Type::INT), 0x00, 0x04,
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static_cast<uint8_t>((_value >> 24) & 0xff),
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static_cast<uint8_t>((_value >> 16) & 0xff),
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static_cast<uint8_t>((_value >> 8) & 0xff),
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static_cast<uint8_t>(_value & 0xff)
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};
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}
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}
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