forked from Lephenixnoir/gint
79 lines
1.7 KiB
C
79 lines
1.7 KiB
C
//---
|
|
// gint:mod:rtc - Real-Time Clock
|
|
//---
|
|
|
|
#ifndef GINT_CORE_RTC
|
|
#define GINT_CORE_RTC
|
|
|
|
#include <gint/defs/attributes.h>
|
|
|
|
//---
|
|
// Hybrid SH7705-SH7305 Real-Time Clock. Refer to:
|
|
// "Renesas SH7705 Group Hardware Manual"
|
|
// Section 15: "Real-Time Clock (RTC)"
|
|
// "Renesas SH7724 User's Manual: Hardware"
|
|
// Section 28: "Real-Time Clock (RTC)"
|
|
//---
|
|
|
|
/* rtc_BCD2_t - a 2-digit BCD counter with a 1-byte gap */
|
|
typedef struct
|
|
{
|
|
byte_union(,
|
|
uint8_t TENS :4;
|
|
uint8_t ONES :4;
|
|
);
|
|
pad(1);
|
|
|
|
} GPACKED(2) rtc_BCD2_t;
|
|
|
|
/* sh7705_rtc_t, sh7305_rtc_t - Date and time access, RTC control */
|
|
typedef volatile struct
|
|
{
|
|
uint8_t const R64CNT; /* A 64-Hz counter */
|
|
pad(1);
|
|
|
|
rtc_BCD2_t RSECCNT; /* Second count */
|
|
rtc_BCD2_t RMINCNT; /* Minute count */
|
|
rtc_BCD2_t RHRCNT; /* Hour count */
|
|
|
|
uint8_t RWKCNT; /* Day of week, must be in [0..6] */
|
|
pad(1);
|
|
|
|
rtc_BCD2_t RDAYCNT; /* Day count */
|
|
rtc_BCD2_t RMONCNT; /* Month count */
|
|
|
|
word_union(RYRCNT, /* Year count */
|
|
uint THOUSANDS :4;
|
|
uint HUNDREDS :4;
|
|
uint TENS :4;
|
|
uint ONES :4;
|
|
);
|
|
pad(12); /* Alarm registers... */
|
|
|
|
byte_union(RCR1,
|
|
uint8_t CF :1; /* Carry flag */
|
|
uint8_t :2;
|
|
uint8_t CIE :1; /* Carry interrupt enable */
|
|
uint8_t AIE :1; /* Alarm interrupt enable */
|
|
uint8_t :2;
|
|
uint8_t AF :1; /* Alarm flag */
|
|
);
|
|
pad(1);
|
|
|
|
byte_union(RCR2,
|
|
uint8_t PEF :1; /* Periodic interrupt flag */
|
|
uint8_t PES :3; /* Periodic interrupt interval */
|
|
uint8_t :1;
|
|
uint8_t ADJ :1; /* 30-second adjustment */
|
|
uint8_t RESET :1; /* Reset trigger */
|
|
uint8_t START :1; /* Start bit */
|
|
);
|
|
pad(1);
|
|
|
|
} GPACKED(4) rtc_t;
|
|
|
|
#define SH7705_RTC (*((rtc_t *)0xfffffec0))
|
|
#define SH7305_RTC (*((rtc_t *)0xa413fec0))
|
|
|
|
#endif /* GINT_CORE_RTC */
|