132 lines
2.3 KiB
C
132 lines
2.3 KiB
C
#ifndef _MODULES_RTC_H
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#define _MODULES_RTC_H
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#include <modules/macros.h>
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#include <stdint.h>
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/*
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mod_rtc_rcr1_t
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First RTC configuration register.
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*/
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typedef struct
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{
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byte_union(,
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uint CF :1; /* Carry flag */
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uint :2;
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uint CIE :1; /* Carry interrupt enable */
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uint AIE :1; /* Alarm interrupt enable */
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uint :2;
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uint AF :1; /* Alarm flag */
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);
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} __attribute__((packed)) mod_rtc_rcr1_t;
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/*
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mod_rtc_rcr2_t
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Second RTC configuration register.
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*/
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typedef struct
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{
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byte_union(,
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uint PEF :1; /* Periodic interrupt flag */
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uint PES :3; /* Periodic interrupt interval */
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uint :1;
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uint ADJ :1; /* 30-second adjustment */
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uint RESET :1; /* Reset */
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uint START :1; /* Start bit */
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);
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} __attribute__((packed)) mod_rtc_rcr2_t;
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/*
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mod_rtc_rcr3_t
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Third RTC configuration register.
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typedef struct
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{
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byte_union(,
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uint YAEN :1;
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uint :7;
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);
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} __attribute__((packed)) mod_rtc_rcr3_t;
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*/
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/*
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mod_rtc_time_t
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A set of registers describing the current time in BCD format.
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*/
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typedef struct
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{
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const uint8_t R64CNT; /* More or less a 64-Hz counter */
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pad(1);
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byte_union(RSECCNT, /* Second count */
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uint :1;
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uint TENS :3;
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uint ONES :4;
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);
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pad(1);
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byte_union(RMINCNT, /* Minute count */
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uint :1;
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uint TENS :3;
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uint ONES :4;
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);
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pad(1);
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byte_union(RHRCNT, /* Hour count */
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uint :2;
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uint TENS :2;
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uint ONES :4;
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);
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pad(1);
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/* 0 = Sunday .. 6 = Saturday, other settings are prohibited. */
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uint8_t RWKCNT; /* Day of week */
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pad(1);
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byte_union(RDAYCNT, /* Day count */
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uint :2;
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uint TENS :2;
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uint ONES :4;
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);
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pad(1);
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byte_union(RMONCNT, /* Month count */
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uint :3;
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uint TENS :1;
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uint ONES :4;
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);
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pad(1);
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word_union(RYRCNT, /* Year count */
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uint THOUSANDS :4;
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uint HUNDREDS :4;
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uint TENS :4;
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uint ONES :4;
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);
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} __attribute__((packed, aligned(2))) mod_rtc_time_t;
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/*
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mod_rtc_t (resides into gint memory)
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Three control registers and timer information.
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*/
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typedef struct
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{
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/* RCR1, RCR2, and RCR3 are the same for both platforms. */
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volatile mod_rtc_rcr1_t *RCR1;
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volatile mod_rtc_rcr2_t *RCR2;
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// volatile mod_rtc_rcr3_t *RCR3;
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/* Current time in register memory */
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volatile mod_rtc_time_t *time;
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} mod_rtc_t;
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// All you need to use is this structure, initialized by gint, which contains
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// address that work with your execution platform.
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extern mod_rtc_t RTC;
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#endif // _INTERNALS_RTC_H
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