107 lines
2.7 KiB
C
107 lines
2.7 KiB
C
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/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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pxds1585.h
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Abstract:
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The module defines the structures, and defines for the DALLAS rtc chip.
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Author:
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Jim Wooldridge
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Revision History:
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--*/
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typedef struct _RTC_CONTROL {
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UCHAR Reserved0[0x71];
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UCHAR RtcData; // Offset 0x71
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} RTC_CONTROL, *PRTC_CONTROL;
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typedef struct _NVRAM_CONTROL {
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UCHAR Reserved0[0x74];
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UCHAR NvramIndexLo; // Offset 0x74
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UCHAR NvramIndexHi; // Offset 0x75
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UCHAR Reserved2[1];
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UCHAR NvramData; // Offset 0x77
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} NVRAM_CONTROL, *PNVRAM_CONTROL;
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//
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// Define Realtime Clock register numbers.
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//
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#define RTC_SECOND 0 // second of minute [0..59]
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#define RTC_SECOND_ALARM 1 // seconds to alarm
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#define RTC_MINUTE 2 // minute of hour [0..59]
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#define RTC_MINUTE_ALARM 3 // minutes to alarm
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#define RTC_HOUR 4 // hour of day [0..23]
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#define RTC_HOUR_ALARM 5 // hours to alarm
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#define RTC_DAY_OF_WEEK 6 // day of week [1..7]
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#define RTC_DAY_OF_MONTH 7 // day of month [1..31]
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#define RTC_MONTH 8 // month of year [1..12]
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#define RTC_YEAR 9 // year [00..99]
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#define RTC_CONTROL_REGISTERA 10 // control register A
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#define RTC_CONTROL_REGISTERB 11 // control register B
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#define RTC_CONTROL_REGISTERC 12 // control register C
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#define RTC_CONTROL_REGISTERD 13 // control register D
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#define RTC_BATTERY_BACKED_UP_RAM 14 // battery backed up RAM [0..49]
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//
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// Define Control Register A structure.
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//
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typedef struct _RTC_CONTROL_REGISTER_A {
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UCHAR RateSelect : 4;
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UCHAR TimebaseDivisor : 3;
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UCHAR UpdateInProgress : 1;
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} RTC_CONTROL_REGISTER_A, *PRTC_CONTROL_REGISTER_A;
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//
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// Define Control Register B structure.
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//
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typedef struct _RTC_CONTROL_REGISTER_B {
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UCHAR DayLightSavingsEnable : 1;
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UCHAR HoursFormat : 1;
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UCHAR DataMode : 1;
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UCHAR SquareWaveEnable : 1;
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UCHAR UpdateInterruptEnable : 1;
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UCHAR AlarmInterruptEnable : 1;
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UCHAR TimerInterruptEnable : 1;
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UCHAR SetTime : 1;
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} RTC_CONTROL_REGISTER_B, *PRTC_CONTROL_REGISTER_B;
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//
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// Define Control Register C structure.
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//
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typedef struct _RTC_CONTROL_REGISTER_C {
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UCHAR Fill : 4;
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UCHAR UpdateInterruptFlag : 1;
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UCHAR AlarmInterruptFlag : 1;
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UCHAR TimeInterruptFlag : 1;
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UCHAR InterruptRequest : 1;
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} RTC_CONTROL_REGISTER_C, *PRTC_CONTROL_REGISTER_C;
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//
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// Define Control Register D structure.
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//
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typedef struct _RTC_CONTROL_REGISTER_D {
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UCHAR Fill : 7;
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UCHAR ValidTime : 1;
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} RTC_CONTROL_REGISTER_D, *PRTC_CONTROL_REGISTER_D;
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