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113 lines
2.1 KiB
C++
113 lines
2.1 KiB
C++
// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
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// SPDX-License-Identifier: CC-BY-NC-ND-4.0
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#pragma once
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#include "controller.h"
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#include "memory_card_image.h"
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#include "timing_event.h"
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#include "common/bitfield.h"
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#include <array>
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#include <memory>
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#include <string>
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#include <string_view>
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class MemoryCard final
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{
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public:
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MemoryCard();
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~MemoryCard();
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static constexpr u32 STATE_SIZE = 1 + 1 + 2 + 1 + 1 + 1 + MemoryCardImage::DATA_SIZE + 1;
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static std::unique_ptr<MemoryCard> Create();
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static std::unique_ptr<MemoryCard> Open(std::string_view path);
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const MemoryCardImage::DataArray& GetData() const { return m_data; }
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MemoryCardImage::DataArray& GetData() { return m_data; }
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const std::string& GetPath() const { return m_path; }
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void Reset();
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bool DoState(StateWrapper& sw);
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void CopyState(const MemoryCard* src);
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void ResetTransferState();
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bool Transfer(const u8 data_in, u8* data_out);
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bool IsOrWasRecentlyWriting() const;
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void Format();
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private:
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enum : u32
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{
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// save in three seconds, that should be long enough for everything to finish writing
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SAVE_DELAY_IN_SECONDS = 5,
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};
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union FLAG
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{
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u8 bits;
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BitField<u8, bool, 3, 1> no_write_yet;
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BitField<u8, bool, 2, 1> write_error;
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};
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enum class State : u8
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{
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Idle,
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Command,
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ReadCardID1,
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ReadCardID2,
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ReadAddressMSB,
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ReadAddressLSB,
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ReadACK1,
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ReadACK2,
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ReadConfirmAddressMSB,
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ReadConfirmAddressLSB,
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ReadData,
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ReadChecksum,
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ReadEnd,
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WriteCardID1,
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WriteCardID2,
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WriteAddressMSB,
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WriteAddressLSB,
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WriteData,
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WriteChecksum,
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WriteACK1,
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WriteACK2,
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WriteEnd,
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GetIDCardID1,
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GetIDCardID2,
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GetIDACK1,
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GetIDACK2,
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GetID1,
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GetID2,
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GetID3,
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GetID4,
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};
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static TickCount GetSaveDelayInTicks();
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bool SaveIfChanged(bool display_osd_message);
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void QueueFileSave();
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State m_state = State::Idle;
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FLAG m_FLAG = {};
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u16 m_address = 0;
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u8 m_sector_offset = 0;
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u8 m_checksum = 0;
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u8 m_last_byte = 0;
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bool m_changed = false;
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TimingEvent m_save_event;
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std::string m_path;
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MemoryCardImage::DataArray m_data{};
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};
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