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◆ main openmsx / src / serial / YM2148.hh
2.0 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#ifndef YM2148_HH
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#define YM2148_HH
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#include "IRQHelper.hh"
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#include "MidiInConnector.hh"
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#include "MidiOutConnector.hh"
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#include "Schedulable.hh"
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#include "outer.hh"
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#include <cstdint>
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namespace openmsx {
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class MSXMotherBoard;
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class Scheduler;
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class YM2148 final : public MidiInConnector
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{
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public:
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	YM2148(const std::string& name, MSXMotherBoard& motherBoard);
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	void reset();
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	void writeCommand(uint8_t value);
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	void writeData(uint8_t value, EmuTime time);
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	[[nodiscard]] uint8_t readStatus(EmuTime time) const;
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	[[nodiscard]] uint8_t readData(EmuTime time);
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	[[nodiscard]] uint8_t peekStatus(EmuTime time) const;
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	[[nodiscard]] uint8_t peekData(EmuTime time) const;
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	[[nodiscard]] bool pendingIRQ() const;
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	template<typename Archive>
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	void serialize(Archive& ar, unsigned version);
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private:
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	// MidiInConnector
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	[[nodiscard]] bool ready() override;
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	[[nodiscard]] bool acceptsData() override;
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	void setDataBits(DataBits bits) override;
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	void setStopBits(StopBits bits) override;
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	void setParityBit(bool enable, Parity parity) override;
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	void recvByte(uint8_t value, EmuTime time) override;
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	// Schedulable
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	struct SyncRecv final : Schedulable {
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		friend class YM2148;
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		explicit SyncRecv(Scheduler& s) : Schedulable(s) {}
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		void executeUntil(EmuTime time) override {
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			auto& ym2148 = OUTER(YM2148, syncRecv);
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			ym2148.execRecv(time);
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		}
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	} syncRecv;
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	struct SyncTrans final : Schedulable {
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		friend class YM2148;
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		explicit SyncTrans(Scheduler& s) : Schedulable(s) {}
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		void executeUntil(EmuTime time) override {
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			auto& ym2148 = OUTER(YM2148, syncTrans);
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			ym2148.execTrans(time);
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		}
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	} syncTrans;
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	void execRecv (EmuTime time);
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	void execTrans(EmuTime time);
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	void send(uint8_t value, EmuTime time);
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	IRQHelper rxIRQ;
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	IRQHelper txIRQ;
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	bool rxReady;
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	uint8_t rxBuffer;      //<! Byte received from MIDI in connector.
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	uint8_t txBuffer1 = 0; //<! The byte currently being send.
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	uint8_t txBuffer2 = 0; //<! The next to-be-send byte.
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	uint8_t status;
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	uint8_t commandReg;
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	MidiOutConnector outConnector;
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};
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SERIALIZE_CLASS_VERSION(YM2148, 2);
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} // namespace openmsx
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#endif