Because it's been so long, I've forgotten how I set it up back then. The problem seems to stem from the difference in settings between the `RTC_FORMAT_BIN` and `RTC_FORMAT_BCD` parameters, which led to different results. Also, the modulo operation is very important. I'm providing the code for your reference; the code might be incorrect, but it's for informational purposes only.
void MX_RTC_Init(void)
{
/* USER CODE BEGIN RTC_Init 0 */
/* USER CODE END RTC_Init 0 */
RTC_TimeTypeDef sTime = {0};
RTC_DateTypeDef sDate = {0};
RTC_AlarmTypeDef sAlarm = {0};
/* USER CODE BEGIN RTC_Init 1 */
/* USER CODE END RTC_Init 1 */
/** Initialize RTC Only
*/
hrtc.Instance = RTC;
hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
hrtc.Init.AsynchPrediv = 127;
hrtc.Init.SynchPrediv = 255;
hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
hrtc.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;
hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
hrtc.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
if (HAL_RTC_Init(&hrtc) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN Check_RTC_BKUP */
/* USER CODE END Check_RTC_BKUP */
/** Initialize RTC and set the Time and Date
*/
sTime.Hours = 8;
sTime.Minutes = 5;
sTime.Seconds = 0;
sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
sTime.StoreOperation = RTC_STOREOPERATION_RESET;
if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BIN) != HAL_OK)
{
Error_Handler();
}
sDate.WeekDay = RTC_WEEKDAY_MONDAY;
sDate.Month = RTC_MONTH_AUGUST;
sDate.Date = 2;
sDate.Year = 24;
if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BIN) != HAL_OK)
{
Error_Handler();
}
/** Enable the Alarm A
*/
sAlarm.AlarmTime.Hours = 8;
sAlarm.AlarmTime.Minutes = 5;
sAlarm.AlarmTime.Seconds = 1;
sAlarm.AlarmTime.SubSeconds = 0;
sAlarm.AlarmTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
sAlarm.AlarmTime.StoreOperation = RTC_STOREOPERATION_RESET;
sAlarm.AlarmMask = RTC_ALARMMASK_DATEWEEKDAY|RTC_ALARMMASK_HOURS
|RTC_ALARMMASK_MINUTES;
sAlarm.AlarmSubSecondMask = RTC_ALARMSUBSECONDMASK_ALL;
sAlarm.AlarmDateWeekDaySel = RTC_ALARMDATEWEEKDAYSEL_DATE;
sAlarm.AlarmDateWeekDay = 1;
sAlarm.Alarm = RTC_ALARM_A;
if (HAL_RTC_SetAlarm_IT(&hrtc, &sAlarm, RTC_FORMAT_BIN) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN RTC_Init 2 */
__HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(&hrtc, RTC_FLAG_WUTF);
if (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0, RTC_WAKEUPCLOCK_CK_SPRE_16BITS) != HAL_OK)
{
Error_Handler();
}
myRun.clock.sdatestructureget = sDate;
myRun.clock.stimestructureget = sTime;
/* USER CODE END RTC_Init 2 */
}void getTimeLocal(void)
{
HAL_RTC_GetTime(&hrtc, &GetTime, RTC_FORMAT_BIN);
HAL_RTC_GetDate(&hrtc, &GetData, RTC_FORMAT_BIN);
}static void dispCalender(RTC_DateTypeDef GetData, RTC_TimeTypeDef GetTime)
{
getTimeLocal();
// Displayed on the LCD screen.
_intDisplayFix((int)(GetData.Year % 100), 17, 2, false); // year
PutCharDot(18);
_intDisplayFix(GetData.Month, 19, 2, false); // month
_intDisplayFix(GetData.Date, 21, 2, false); // day
_intDisplayFix(GetTime.Hours, 25, 2, false); // hour
PutCharDot(26);
_intDisplayFix(GetTime.Minutes, 27, 2, false); // min
_intDisplayFix(GetTime.Seconds, 3, 2, false); // sec
}void rtc_getCalendarTime(RTC_C_Calendar *rtc)
{
RTC_DateTypeDef LocalData;
RTC_TimeTypeDef LocalTime;
HAL_RTC_GetTime(&hrtc, &LocalTime, RTC_FORMAT_BIN);
HAL_RTC_GetDate(&hrtc, &LocalData, RTC_FORMAT_BIN);
rtc->stimestructureget.Seconds = LocalTime.Seconds % 60;
rtc->stimestructureget.Minutes = LocalTime.Minutes % 60;
rtc->stimestructureget.Hours = LocalTime.Hours % 24;
rtc->sdatestructureget.Date = LocalData.Date;
rtc->sdatestructureget.Month = LocalData.Month;
rtc->sdatestructureget.Year = LocalData.Year;
rtc->sdatestructureget.WeekDay = LocalData.WeekDay;
return;
}
/* RTC second interrupt */
void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc)
{
static int sec_cnt = 0;
if (hrtc->State == HAL_RTC_STATE_READY)
rtc_getCalendarTime(&myRun.clock);
triggerLcdUpdate(1); // Trigger LCD refresh
}
My program's function is to display the current time on the LCD screen in real time every second, and the `dispCalender()` function should be called once every second. For your reference only!
