static void RTC_Config(void)
{
RTC_InitTypeDef RTC_InitStructure;
RTC_TimeTypeDef RTC_TimeStructure;
uint32_t LSIFreq = 0;
RCC_BackupResetCmd(ENABLE);RCC_BackupResetCmd(DISABLE);//增加避免 复位脚引起初始化不通过！
/* Enable the PWR clock */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
/* Allow access to Backup Domain */
PWR_BackupAccessCmd(ENABLE);
/* Disable wake-up source(ALARM) to guarantee free access to WUT level-OR input */
RTC_ITConfig(RTC_IT_ALRA, DISABLE);
/* Enable wake-up source(ALARM) to guarantee free access to WUT level-OR input */
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
/* Enable the LSI OSC */
RCC_LSICmd(ENABLE);
/* Wait till LSI is ready */
while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
{}
/* Clear Wakeup flag */
PWR_ClearFlag(PWR_FLAG_WU);
/* 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);
/* 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();
/* Get the LSI frequency: TIM14 is used to measure the LSI frequency */
LSIFreq = GetLSIFrequency();
RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;
RTC_InitStructure.RTC_AsynchPrediv = 99;
RTC_InitStructure.RTC_SynchPrediv = (LSIFreq / 100) - 1;
RTC_Init(&RTC_InitStructure);
/* 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_BIN, &RTC_TimeStructure);
}
}
/**
* @brief Enters STANDBY mode, RTC Alarm within 3 second or an external RESET
* will wake-up the system from STANDBY
* @param None
* @retval None
*/
//static void EnterSTANDBYMode(void)
static void EnterSTOPMode(void)
{
RTC_AlarmTypeDef RTC_AlarmStructure;
RTC_TimeTypeDef RTC_TimeStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Disable the Alarm A */
RTC_AlarmCmd(RTC_Alarm_A, DISABLE);
/* Get the current time */
RTC_GetTime(RTC_Format_BIN, &RTC_TimeStructure);
/* Set the alarm to current time + 3s */
RTC_AlarmStructure.RTC_AlarmTime.RTC_H12 = RTC_TimeStructure.RTC_H12;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Hours = RTC_TimeStructure.RTC_Hours;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = RTC_TimeStructure.RTC_Minutes;
RTC_AlarmStructure.RTC_AlarmTime.RTC_Seconds = (RTC_TimeStructure.RTC_Seconds + 0x5) % 60;
RTC_AlarmStructure.RTC_AlarmDateWeekDay = 31;
RTC_AlarmStructure.RTC_AlarmDateWeekDaySel = RTC_AlarmDateWeekDaySel_Date;
//RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay | RTC_AlarmMask_Hours | RTC_AlarmMask_Minutes;
RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_All-RTC_AlarmMask_Seconds ;
RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);
/* Set AlarmA subseconds and enable SubSec Alarm : generate 8 interripts per Second */
// RTC_AlarmSubSecondConfig(RTC_Alarm_A, 0xFF, RTC_AlarmSubSecondMask_SS14_5);
/* Enable RTC Alarm A Interrupt: this Interrupt will wake-up the system from
STANDBY mode (RTC Alarm IT not enabled in NVIC) */
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
/* Enable the Alarm A */
RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
/* Clear RTC Alarm Flag */
RTC_ClearFlag(RTC_FLAG_ALRAF);
// RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);
RTC_ITConfig(RTC_IT_ALRA, ENABLE);
RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
RTC_ClearITPendingBit(RTC_IT_ALRA);
PWR_ClearFlag(PWR_FLAG_WU);
EXTI_ClearITPendingBit(EXTI_Line17);
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_Line = EXTI_Line17;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOC, EXTI_PinSource14);//PC14_RTC_ALARM_OUT
/* NVIC configuration */
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
NVIC_Init(&NVIC_InitStructure);
SysTick->CTRL=0;
/* Request to enter STANDBY mode (Wake Up flag is cleared in PWR_EnterSTANDBYMode function) */
// PWR_EnterSTANDBYMode();
RTC_ClearITPendingBit(RTC_IT_ALRA); EXTI_ClearITPendingBit(EXTI_Line17);
// __WFI();//3.4mA
PWR_EnterSTOPMode( PWR_Regulator_LowPower, PWR_STOPEntry_WFI );
}
