MSXMidi.hh

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#ifndef MSXMIDI_HH
#define MSXMIDI_HH

#include "MSXDevice.hh"
#include "IRQHelper.hh"
#include "MidiInConnector.hh"

namespace openmsx {

class MSXMidiCounter0;
class MSXMidiCounter2;
class MSXMidiI8251Interf;
class ClockPin;
class I8254;
class I8251;
class MidiOutConnector;

class MSXMidi: public MSXDevice, public MidiInConnector
{
public:
        explicit MSXMidi(const DeviceConfig& config);
        virtual ~MSXMidi();

        virtual void reset(EmuTime::param time);
        virtual byte readIO(word port, EmuTime::param time);
        virtual byte peekIO(word port, EmuTime::param time) const;
        virtual void writeIO(word port, byte value, EmuTime::param time);

        // MidiInConnector
        virtual bool ready();
        virtual bool acceptsData();
        virtual void setDataBits(DataBits bits);
        virtual void setStopBits(StopBits bits);
        virtual void setParityBit(bool enable, ParityBit parity);
        virtual void recvByte(byte value, EmuTime::param time);

        template<typename Archive>
        void serialize(Archive& ar, unsigned version);

private:
        void setTimerIRQ(bool status, EmuTime::param time);
        void enableTimerIRQ(bool enabled, EmuTime::param time);
        void updateEdgeEvents(EmuTime::param time);
        void setRxRDYIRQ(bool status);
        void enableRxRDYIRQ(bool enabled);

        void registerIOports(byte value);
        void registerRange(byte port, unsigned num);
        void unregisterRange(byte port, unsigned num);

        const std::unique_ptr<MSXMidiCounter0> cntr0; // counter 0 clock pin
        const std::unique_ptr<MSXMidiCounter2> cntr2; // counter 2 clock pin
        const std::unique_ptr<MSXMidiI8251Interf> interf;

        IRQHelper timerIRQ;
        IRQHelper rxrdyIRQ;
        bool timerIRQlatch;
        bool timerIRQenabled;
        bool rxrdyIRQlatch;
        bool rxrdyIRQenabled;

        const bool isExternalMSXMIDI;
        bool isEnabled; /* EN bit */
        bool isLimitedTo8251; /* inverse of E8 bit */

        // must come last
        const std::unique_ptr<MidiOutConnector> outConnector;
        const std::unique_ptr<I8251> i8251;
        const std::unique_ptr<I8254> i8254;

        friend class MSXMidiCounter0;
        friend class MSXMidiCounter2;
        friend class MSXMidiI8251Interf;
};
SERIALIZE_CLASS_VERSION(MSXMidi, 2);

} // namespace openmsx

#endif