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55 lines
985 B
C++
55 lines
985 B
C++
//
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// I2C.hpp
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// Clock Signal
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//
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// Created by Thomas Harte on 16/03/2024.
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// Copyright © 2024 Thomas Harte. All rights reserved.
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//
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#pragma once
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#include <cstdint>
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#include <unordered_map>
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namespace I2C {
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/// Provides the virtual interface for an I2C peripheral; attaching this to a bus
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/// provides automatic protocol handling.
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class Peripheral {
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};
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class Bus {
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public:
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void set_data(bool pulled);
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bool data();
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void set_clock(bool pulled);
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bool clock();
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void set_clock_data(bool clock_pulled, bool data_pulled);
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void add_peripheral(Peripheral *, int address);
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private:
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bool data_ = false;
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bool clock_ = false;
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std::unordered_map<int, Peripheral *> peripherals_;
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uint16_t input_ = 0xffff;
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int input_count_ = -1;
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Peripheral *active_peripheral_ = nullptr;
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uint16_t peripheral_response_ = 0xffff;
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int peripheral_bits_ = 0;
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enum class Phase {
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AwaitingStart,
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CollectingAddress,
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AwaitingByte,
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CollectingByte,
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} phase_ = Phase::AwaitingStart;
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};
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}
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