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drivers: rtc: stm32 rtc driver configure time and Date

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Set a Calendar using the LL functions LL_RTC_TIME_Init
and LL_RTC_DATE_Init. Add more DBG info
On the stm32F2 serie, check RS Flag after setting calendar registers.

Signed-off-by: Francois Ramu <francois.ramu@st.com>
This commit is contained in:
Francois Ramu 2024-05-15 17:34:46 +02:00 • committed by Maureen Helm
commit 2499a4b226
1 changed files with 46 additions and 30 deletions
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76
drivers/rtc/rtc_ll_stm32.c
View file

@ -392,6 +392,8 @@ static int rtc_stm32_init(const struct device *dev)
static int rtc_stm32_set_time(const struct device *dev, const struct rtc_time *timeptr)
{
struct rtc_stm32_data *data = dev->data;
LL_RTC_TimeTypeDef rtc_time;
LL_RTC_DateTypeDef rtc_date;
uint32_t real_year = timeptr->tm_year + TM_YEAR_REF;
int err = 0;
@ -416,42 +418,47 @@ static int rtc_stm32_set_time(const struct device *dev, const struct rtc_time *t
LL_PWR_EnableBkUpAccess();
#endif /* RTC_STM32_BACKUP_DOMAIN_WRITE_PROTECTION */
LL_RTC_DisableWriteProtection(RTC);
/* Enter Init mode inside the LL_RTC_Time and Date Init functions */
rtc_time.Hours = bin2bcd(timeptr->tm_hour);
rtc_time.Minutes = bin2bcd(timeptr->tm_min);
rtc_time.Seconds = bin2bcd(timeptr->tm_sec);
LL_RTC_TIME_Init(RTC, LL_RTC_FORMAT_BCD, &rtc_time);
ErrorStatus status = LL_RTC_EnterInitMode(RTC);
if (status != SUCCESS) {
err = -EIO;
goto protect_unlock_return;
}
LL_RTC_DATE_SetYear(RTC, bin2bcd(real_year - RTC_YEAR_REF));
LL_RTC_DATE_SetMonth(RTC, bin2bcd(timeptr->tm_mon + 1));
LL_RTC_DATE_SetDay(RTC, bin2bcd(timeptr->tm_mday));
if (timeptr->tm_wday == 0) {
/* sunday (tm_wday = 0) is not represented by the same value in hardware */
LL_RTC_DATE_SetWeekDay(RTC, LL_RTC_WEEKDAY_SUNDAY);
} else {
/* all the other values are consistent with what is expected by hardware */
LL_RTC_DATE_SetWeekDay(RTC, timeptr->tm_wday);
}
LL_RTC_TIME_SetHour(RTC, bin2bcd(timeptr->tm_hour));
LL_RTC_TIME_SetMinute(RTC, bin2bcd(timeptr->tm_min));
LL_RTC_TIME_SetSecond(RTC, bin2bcd(timeptr->tm_sec));
LL_RTC_DisableInitMode(RTC);
protect_unlock_return:
LL_RTC_EnableWriteProtection(RTC);
/* Set Date after Time to be sure the DR is correctly updated on stm32F2 serie. */
rtc_date.Year = bin2bcd((real_year - RTC_YEAR_REF));
rtc_date.Month = bin2bcd((timeptr->tm_mon + 1));
rtc_date.Day = bin2bcd(timeptr->tm_mday);
rtc_date.WeekDay = ((timeptr->tm_wday == 0) ? (LL_RTC_WEEKDAY_SUNDAY) : (timeptr->tm_wday));
/* WeekDay sunday (tm_wday = 0) is not represented by the same value in hardware,
* all the other values are consistent with what is expected by hardware.
*/
LL_RTC_DATE_Init(RTC, LL_RTC_FORMAT_BCD, &rtc_date);
#if RTC_STM32_BACKUP_DOMAIN_WRITE_PROTECTION
LL_PWR_DisableBkUpAccess();
#endif /* RTC_STM32_BACKUP_DOMAIN_WRITE_PROTECTION */
#ifdef CONFIG_SOC_SERIES_STM32F2X
/*
* Because stm32F2 serie has no shadow registers,
* wait until TR and DR registers are synchronised : flag RS
*/
while (LL_RTC_IsActiveFlag_RS(RTC) != 1) {
;
}
#endif /* CONFIG_SOC_SERIES_STM32F2X */
k_mutex_unlock(&data->lock);
LOG_DBG("Calendar set : %d/%d/%d - %dh%dm%ds",
LL_RTC_DATE_GetDay(RTC),
LL_RTC_DATE_GetMonth(RTC),
LL_RTC_DATE_GetYear(RTC),
LL_RTC_TIME_GetHour(RTC),
LL_RTC_TIME_GetMinute(RTC),
LL_RTC_TIME_GetSecond(RTC)
);
return err;
}
@ -504,7 +511,8 @@ static int rtc_stm32_get_time(const struct device *dev, struct rtc_time *timeptr
k_mutex_unlock(&data->lock);
timeptr->tm_year = bcd2bin(__LL_RTC_GET_YEAR(rtc_date)) + RTC_YEAR_REF - TM_YEAR_REF;
/* tm_year is the value since 1900 and Rtc year is from 2000 */
timeptr->tm_year = bcd2bin(__LL_RTC_GET_YEAR(rtc_date)) + (RTC_YEAR_REF - TM_YEAR_REF);
/* tm_mon allowed values are 0-11 */
timeptr->tm_mon = bcd2bin(__LL_RTC_GET_MONTH(rtc_date)) - 1;
timeptr->tm_mday = bcd2bin(__LL_RTC_GET_DAY(rtc_date));
@ -530,11 +538,19 @@ static int rtc_stm32_get_time(const struct device *dev, struct rtc_time *timeptr
#else
timeptr->tm_nsec = 0;
#endif
/* unknown values */
timeptr->tm_yday = -1;
timeptr->tm_isdst = -1;
/* __LL_RTC_GET_YEAR(rtc_date)is the real year (from 2000) */
LOG_DBG("Calendar get : %d/%d/%d - %dh%dm%ds",
timeptr->tm_mday,
timeptr->tm_mon,
__LL_RTC_GET_YEAR(rtc_date),
timeptr->tm_hour,
timeptr->tm_min,
timeptr->tm_sec);
return 0;
}