STM32F051C8T6进入休眠反复重启，且休眠无法唤醒，代码如下，直接从官方例程拷贝过来用的
RTC_InitTypeDef RTC_InitStructure;
RTC_AlarmTypeDef RTC_AlarmStructure;
RTC_TimeTypeDef RTC_TimeStructure;
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to Backup Domain */
PWR_BackupAccessCmd(ENABLE);
/* Check if the StandBy flag is set */
if (PWR_GetFlagStatus(PWR_FLAG_SB) != RESET)
{
/* Clear StandBy flag */
PWR_ClearFlag(PWR_FLAG_SB);
/* Check if the StandBy flag is cleared */
if (PWR_GetFlagStatus(PWR_FLAG_SB) != RESET)
{
while(1);
}
RTC_WaitForSynchro();
/* No need to configure the RTC as the RTC config(clock source, enable,
prescaler,...) are kept after wake-up from STANDBY */
}
else
{
/* RTC Configuration ******************************************************/
/* Reset Backup Domain */
RCC_BackupResetCmd(ENABLE);
RCC_BackupResetCmd(DISABLE);
/* Enable the LSI OSC */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{}
/* Select the RTC Clock Source */
RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
/* Enable the RTC Clock */
RCC_RTCCLKCmd(ENABLE);
/* Wait for RTC APB registers synchronisation */
RTC_WaitForSynchro();
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
RTC_InitStructure.RTC_AsynchPrediv = 0x7F;
RTC_InitStructure.RTC_SynchPrediv = 0x0138;
RTC_Init(&RTC_InitStructure);
/* Set the alarm X+5s */
RTC_AlarmStructure.RTC_AlarmTime.RTC_H12 = RTC_H12_AM;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours = 0x01;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = 0x00;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = 0x3;
RTC_AlarmStructure.RTC_AlarmDateWeekDay = 0x31;
RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay;
RTC_SetAlarm(RTC_Format_BCD, RTC_Alarm_A, &RTC_AlarmStructure);
/* Enable RTC Alarm A Interrupt */
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
/* Enable the alarm */
RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
}
/* Set the time to 01h 00mn 00s AM */
RTC_TimeStructure.RTC_H12 = RTC_H12_AM;
RTC_TimeStructure.RTC_Hours = 0x01;
RTC_TimeStructure.RTC_Minutes = 0x00;
RTC_TimeStructure.RTC_Seconds = 0x00;
RTC_SetTime(RTC_Format_BCD, &RTC_TimeStructure);
/* Clear Wakeup flag */
PWR_ClearFlag(PWR_FLAG_WU);
RTC_ClearFlag(RTC_FLAG_ALRAF);
/* Request to enter STANDBY mode (Wake Up flag is cleared in PWR_EnterSTANDBYMode function) */
PWR_EnterSTANDBYMode(); |
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