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/*********************************************************************
Philips PCF8593 CMOS clock/calendar circuit
(c) 2001-2007 Tim Schuerewegen
*********************************************************************/
#ifndef __PCF8593_H__
#define __PCF8593_H__
#include "emu.h"
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_PCF8593_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, PCF8593, 0)
#define MCFG_PCF8593_REMOVE(_tag) \
MCFG_DEVICE_REMOVE(_tag)
// ======================> pcf8593_device
class pcf8593_device : public device_t,
public device_rtc_interface,
public device_nvram_interface
{
public:
pcf8593_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
DECLARE_WRITE_LINE_MEMBER(scl_w);
DECLARE_WRITE_LINE_MEMBER(sda_w);
DECLARE_READ_LINE_MEMBER(sda_r);
protected:
// device-level overrides
virtual void device_start();
virtual void device_reset();
virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);
// device_rtc_interface overrides
virtual bool rtc_feature_y2k() { return true; }
virtual void rtc_clock_updated(int year, int month, int day, int day_of_week, int hour, int minute, int second);
// device_nvram_interface overrides
virtual void nvram_default();
virtual void nvram_read(emu_file &file);
virtual void nvram_write(emu_file &file);
private:
void clear_buffer_rx();
static const device_timer_id TIMER_UPDATE_COUNTER = 0;
// internal state
UINT8 m_data[16];
int m_pin_scl;
int m_pin_sda;
int m_inp;
int m_active;
int m_bits;
UINT8 m_data_recv_index;
UINT8 m_data_recv[50];
UINT8 m_mode;
UINT8 m_pos;
emu_timer * m_timer;
enum { RTC_MODE_NONE, RTC_MODE_SEND, RTC_MODE_RECV };
};
// device type definition
extern const device_type PCF8593;
#endif /* __PCF8593_H__ */
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