香主：RTC报警功能有的时候为什么不进中断

只看该作者 · 2010-12-23 22:39

本帖最后由 Aaron888 于 2010-12-23 22:41 编辑

如题：我的配置如下，有的时候程序下载下去，标志位有但是不进RTC中断，图片中是没有进中断时RTC寄存器的值，有劳香主赐教！
void RTC_Configuration(void)
{
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
PWR_BackupAccessCmd(ENABLE);
BKP_DeInit();
RCC_LSEConfig(RCC_LSE_ON);
while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
{
}

RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);

RCC_RTCCLKCmd(ENABLE);

RTC_WaitForSynchro();

RTC_WaitForLastTask();

RTC_SetPrescaler(32767);//设置RTC预分频寄存器(RTC->RLH和RTC->RLL)，RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1)

RTC_WaitForLastTask();//等待RTC上一次操作结束

}

void RTCAlarm_Config(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Line = EXTI_Line17;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);

NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

RTC_SetAlarm(RTC_GetCounter()+1);
RTC_WaitForLastTask();

RTC_ITConfig(RTC_IT_ALR, ENABLE);//允许RTC闹钟中断(寄存器：RTC->CRH)

RTC_WaitForLastTask();//等待RTC上一次操作结束(寄存器：RTC->CRL)
}
void RTCAlarm_IRQHandler(void)
{
if( RTC_GetITStatus(RTC_IT_ALR) != RESET )
{
      RTC_WaitForLastTask();
      RTC_ClearFlag(RTC_FLAG_ALR);
      RTC_WaitForLastTask();
      RTC_SetAlarm(RTC_GetCounter()+1);
      RTC_WaitForLastTask();
}
EXTI_ClearITPendingBit(EXTI_Line17);
}

}