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/***************************************************************************
v3021.h
EM Microelectronic-Marin SA Ultra Low Power 32kHz CMOS RTC (DIP8)
Serial Real Time Clock
***************************************************************************/
#pragma once
#ifndef __v3021DEV_H__
#define __v3021DEV_H__
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_V3021_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, v3021, XTAL_32_768kHz)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
struct rtc_regs_t
{
UINT8 sec, min, hour, day, wday, month, year;
};
// ======================> v3021_device
class v3021_device : public device_t
{
public:
// construction/destruction
v3021_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// I/O operations
DECLARE_WRITE8_MEMBER( write );
DECLARE_READ8_MEMBER( read );
void timer_callback();
protected:
// device-level overrides
virtual void device_validity_check(validity_checker &valid) const;
virtual void device_start();
virtual void device_reset();
inline UINT8 rtc_read(UINT8 offset);
inline void rtc_write(UINT8 offset,UINT8 data);
static TIMER_CALLBACK( rtc_inc_callback );
UINT8 m_cal_mask,m_cal_com,m_cal_cnt,m_cal_val;
rtc_regs_t m_rtc;
};
// device type definition
extern const device_type v3021;
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
#endif
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