pinebuds/platform/hal/hal_rtc.c
2022-08-15 17:20:27 +08:00

246 lines
6.1 KiB
C

/***************************************************************************
*
* Copyright 2015-2019 BES.
* All rights reserved. All unpublished rights reserved.
*
* No part of this work may be used or reproduced in any form or by any
* means, or stored in a database or retrieval system, without prior written
* permission of BES.
*
* Use of this work is governed by a license granted by BES.
* This work contains confidential and proprietary information of
* BES. which is protected by copyright, trade secret,
* trademark and other intellectual property rights.
*
****************************************************************************/
#ifdef CHIP_HAS_DIG_RTC
#include "plat_addr_map.h"
#include "hal_rtc.h"
#include "reg_rtc.h"
static HAL_RTC_IRQ_HANDLER_T irq_handler = NULL;
static struct RTC_T * const rtc = (struct RTC_T *)RTC_BASE;
static const unsigned char rtc_days_in_month[] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
static const unsigned short rtc_ydays[2][13] = {
/* Normal years */
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
/* Leap years */
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
#define LEAPS_THRU_END_OF(y) ((y)/4 - (y)/100 + (y)/400)
static inline int is_leap_year(unsigned int year)
{
return (!(year % 4) && (year % 100)) || !(year % 400);
}
/*
* The number of days in the month.
*/
int rtc_month_days(unsigned int month, unsigned int year)
{
return rtc_days_in_month[month] + (is_leap_year(year) && month == 1);
}
/*
* The number of days since January 1. (0 to 365)
*/
int rtc_year_days(unsigned int day, unsigned int month, unsigned int year)
{
return rtc_ydays[is_leap_year(year)][month] + day-1;
}
/*
* Convert seconds since 01-01-1970 00:00:00 to Gregorian date.
*/
void rtc_time_to_tm(unsigned long time, struct rtc_time *tm)
{
unsigned int month, year;
int days;
days = time / 86400;
time -= (unsigned int) days * 86400;
/* day of the week, 1970-01-01 was a Thursday */
//tm->tm_wday = (days + 4) % 7;
year = 1970 + days / 365;
days -= (year - 1970) * 365
+ LEAPS_THRU_END_OF(year - 1)
- LEAPS_THRU_END_OF(1970 - 1);
if (days < 0) {
year -= 1;
days += 365 + is_leap_year(year);
}
tm->tm_year = year - 1900;
//tm->tm_yday = days + 1;
for (month = 0; month < 11; month++) {
int newdays;
newdays = days - rtc_month_days(month, year);
if (newdays < 0)
break;
days = newdays;
}
tm->tm_mon = month;
tm->tm_mday = days + 1;
tm->tm_hour = time / 3600;
time -= tm->tm_hour * 3600;
tm->tm_min = time / 60;
tm->tm_sec = time - tm->tm_min * 60;
}
/*
* Does the rtc_time represent a valid date/time?
*/
int rtc_valid_tm(struct rtc_time *tm)
{
if (tm->tm_year < 70
|| ((unsigned)tm->tm_mon) >= 12
|| tm->tm_mday < 1
|| tm->tm_mday > rtc_month_days(tm->tm_mon, tm->tm_year + 1900)
|| ((unsigned)tm->tm_hour) >= 24
|| ((unsigned)tm->tm_min) >= 60
|| ((unsigned)tm->tm_sec) >= 60)
return -1;
return 0;
}
/* Converts Gregorian date to seconds since 1970-01-01 00:00:00.
* Assumes input in normal date format, i.e. 1980-12-31 23:59:59
* => year=1980, mon=12, day=31, hour=23, min=59, sec=59.
*
* [For the Julian calendar (which was used in Russia before 1917,
* Britain & colonies before 1752, anywhere else before 1582,
* and is still in use by some communities) leave out the
* -year/100+year/400 terms, and add 10.]
*
* This algorithm was first published by Gauss (I think).
*
* WARNING: this function will overflow on 2106-02-07 06:28:16 on
* machines where long is 32-bit! (However, as time_t is signed, we
* will already get problems at other places on 2038-01-19 03:14:08)
*/
unsigned long
mktime(const unsigned int year0, const unsigned int mon0,
const unsigned int day, const unsigned int hour,
const unsigned int min, const unsigned int sec)
{
unsigned int mon = mon0, year = year0;
/* 1..12 -> 11,12,1..10 */
if (0 >= (int) (mon -= 2)) {
mon += 12; /* Puts Feb last since it has leap day */
year -= 1;
}
return ((((unsigned long)
(year/4 - year/100 + year/400 + 367*mon/12 + day) +
year*365 - 719499
)*24 + hour /* now have hours */
)*60 + min /* now have minutes */
)*60 + sec; /* finally seconds */
}
/*
* Convert Gregorian date to seconds since 01-01-1970 00:00:00.
*/
int rtc_tm_to_time(struct rtc_time *tm, unsigned long *time)
{
*time = mktime(tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec);
return 0;
}
int hal_rtc_get(struct rtc_time *time)
{
unsigned long value;
if ((rtc->RTCCR & RTC_CR_EN) == 0) {
return 1;
}
value = rtc->RTCDR;
rtc_tm_to_time(time, &value);
return 0;
}
int hal_rtc_set(struct rtc_time *time)
{
unsigned long value;
if (rtc_valid_tm(time) != 0) {
return 1;
}
if ((rtc->RTCCR & RTC_CR_EN) == 0) {
rtc->RTCCR = RTC_CR_EN;
}
rtc_tm_to_time(time, &value);
rtc->RTCLR = value;
return 0;
}
int hal_rtc_set_alarm(struct rtc_time *time)
{
unsigned long value;
if (rtc_valid_tm(time) != 0) {
return 1;
}
if ((rtc->RTCCR & RTC_CR_EN) == 0) {
return 1;
}
rtc_tm_to_time(time, &value);
rtc->RTCMR = value;
rtc->RTCICR = RTC_BIT_AI;
rtc->RTCIMSC = RTC_BIT_AI;
return 0;
}
int hal_rtc_clear_alarm(void)
{
rtc->RTCIMSC = 0;
rtc->RTCICR = RTC_BIT_AI;
return 0;
}
HAL_RTC_IRQ_HANDLER_T hal_rtc_set_irq_handler(HAL_RTC_IRQ_HANDLER_T handler)
{
HAL_RTC_IRQ_HANDLER_T old_handler;
old_handler = irq_handler;
irq_handler = handler;
return old_handler;
}
void RTC_IRQHandler(void)
{
uint32_t value;
struct rtc_time time;
if ((rtc->RTCMIS & RTC_BIT_AI) != 0) {
rtc->RTCICR = RTC_BIT_AI;
if (irq_handler != NULL) {
value = rtc->RTCDR;
rtc_time_to_tm(value, &time);
irq_handler(&time);
}
}
}
#endif // CHIP_HAS_DIG_RTC