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// license:BSD-3-Clause
// copyright-holders:Curt Coder
/**********************************************************************

    Microelectronic-Marin E050-16 Real Time Clock emulation

**********************************************************************
                            _____   _____
                  Vdd1   1 |*    \_/     | 16  Vdd2
                OSC IN   2 |             | 15  Clk
               OSC OUT   3 |             | 14  XOUT
                 _STOP   4 |   E05-16    | 13  DI/O
                _RESET   5 |   E050-16   | 12  _SEC
               _OUTSEL   6 |             | 11  _MIN
                  _DAY   7 |             | 10  _HRS
                   Vss   8 |_____________| 9   _CS

**********************************************************************/

#ifndef MAME_MACHINE_E0516_H
#define MAME_MACHINE_E0516_H

#pragma once

#include "dirtc.h"

class e0516_device : public device_t, public device_rtc_interface
{
public:
	// construction/destruction
	e0516_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);

	DECLARE_WRITE_LINE_MEMBER( cs_w );
	DECLARE_WRITE_LINE_MEMBER( clk_w );
	DECLARE_WRITE_LINE_MEMBER( dio_w );
	DECLARE_READ_LINE_MEMBER( dio_r );

protected:
	// device-level overrides
	virtual void device_start() override;
	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;

	// device_rtc_interface overrides
	virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second) override;

private:
	int m_cs;                       // chip select
	int m_clk;                      // clock
	int m_data_latch;               // data latch
	int m_reg_latch;                // register latch
	int m_read_write;               // read/write data
	int m_state;                    // state
	int m_bits;                     // number of bits transferred
	int m_dio;                      // data pin

	// timers
	emu_timer *m_timer;
};


// device type definition
DECLARE_DEVICE_TYPE(E0516, e0516_device)

#endif // MAME_MACHINE_E0516_H