1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
// license:BSD-3-Clause
// copyright-holders:Angelo Salese, David Haywood
/***************************************************************************
rtc9701.h
Serial rtc9701s.
***************************************************************************/
#pragma once
#ifndef __rtc9701DEV_H__
#define __rtc9701DEV_H__
//**************************************************************************
// INTERFACE CONFIGURATION MACROS
//**************************************************************************
#define MCFG_RTC9701_ADD(_tag) \
MCFG_DEVICE_ADD(_tag, rtc9701, XTAL_32_768kHz)
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
enum rtc9701_state_t
{
RTC9701_CMD_WAIT = 0,
RTC9701_RTC_READ,
RTC9701_RTC_WRITE,
RTC9701_EEPROM_READ,
RTC9701_EEPROM_WRITE,
RTC9701_AFTER_WRITE_ENABLE
};
struct rtc_regs_t
{
UINT8 sec, min, hour, day, wday, month, year;
};
// ======================> rtc9701_device
class rtc9701_device : public device_t,
public device_nvram_interface
{
public:
// construction/destruction
rtc9701_device(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock);
// I/O operations
DECLARE_WRITE_LINE_MEMBER( write_bit );
DECLARE_READ_LINE_MEMBER( read_bit );
DECLARE_WRITE_LINE_MEMBER( set_cs_line );
DECLARE_WRITE_LINE_MEMBER( set_clock_line );
void timer_callback();
protected:
// device-level overrides
virtual void device_validity_check(validity_checker &valid) const;
virtual void device_start();
virtual void device_reset();
// device_nvram_interface overrides
virtual void nvram_default();
virtual void nvram_read(emu_file &file);
virtual void nvram_write(emu_file &file);
inline UINT8 rtc_read(UINT8 offset);
inline void rtc_write(UINT8 offset,UINT8 data);
static TIMER_CALLBACK( rtc_inc_callback );
int m_latch;
int m_reset_line;
int m_clock_line;
rtc9701_state_t rtc_state;
int cmd_stream_pos;
int current_cmd;
int rtc9701_address_pos;
int rtc9701_current_address;
UINT16 rtc9701_current_data;
int rtc9701_data_pos;
UINT16 rtc9701_data[0x100];
rtc_regs_t m_rtc;
};
// device type definition
extern const device_type rtc9701;
//**************************************************************************
// GLOBAL VARIABLES
//**************************************************************************
#endif
|