STM32F103RE的闹钟中断问题求教

只看该作者 · 2022-1-9 18:39

使用的是正点原子的例子，但是用的是LSI最为时钟源，但是一直复位，不懂为什么，有没有老哥解答一下的，main函数里面有一个打印，上电之后就是一直刷那个打印static void RTC_NVIC_Config(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
      EXTI_InitTypeDef EXTI_InitStructure;
      NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;             //RTCÈ«¾ÖÖÐ¶Ï
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;       //ÏÈÕ¼ÓÅÏÈ¼¶1Î»,´ÓÓÅÏÈ¼¶3Î»
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;       //ÏÈÕ¼ÓÅÏÈ¼¶0Î»,´ÓÓÅÏÈ¼¶4Î»
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;             //Ê¹ÄÜ¸ÃÍ¨µÀÖÐ¶Ï
      NVIC_Init(&NVIC_InitStructure);             //¸ù¾ÝNVIC_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèNVIC¼Ä´æÆ÷
      NVIC_InitStructure.NVIC_IRQChannel =RTCAlarm_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelCmd =ENABLE;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority =1;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority =1;
      NVIC_Init(&NVIC_InitStructure);
      EXTI_ClearITPendingBit(EXTI_Line17);
      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);
}

//ÊµÊ±Ê±ÖÓÅäÖÃ
//³õÊ¼»¯RTCÊ±ÖÓ,Í¬Ê±¼ì²âÊ±ÖÓÊÇ·ñ¹¤×÷Õý³£
//BKP->DR1ÓÃÓÚ±£´æÊÇ·ñµÚÒ»´ÎÅäÖÃµÄÉèÖÃ
//·µ»Ø0:Õý³£
//ÆäËû:´íÎó´úÂë

u8 RTC_Init(void)
{
      //¼ì²éÊÇ²»ÊÇµÚÒ»´ÎÅäÖÃÊ±ÖÓ
      u8 temp=0;
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);       //Ê¹ÄÜPWRºÍBKPÍâÉèÊ±ÖÓ
      PWR_BackupAccessCmd(ENABLE);       //Ê¹ÄÜºó±¸¼Ä´æÆ÷·ÃÎÊ


            BKP_DeInit();       //¸´Î»±¸·ÝÇøÓò
            RCC_LSICmd(ENABLE);       //ÉèÖÃÍâ²¿µÍËÙ¾§Õñ(LSE),Ê¹ÓÃÍâÉèµÍËÙ¾§Õñ

            while (RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)       //¼ì²éÖ¸¶¨µÄRCC±êÖ¾Î»ÉèÖÃÓë·ñ,µÈ´ýµÍËÙ¾§Õñ¾ÍÐ÷
                     {
                     temp++;
                     delay_ms(10);
                     }
            if(temp>=250)return 1;//³õÊ¼»¯Ê±ÖÓÊ§°Ü,¾§ÕñÓÐÎÊÌâ

            RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);             //ÉèÖÃRTCÊ±ÖÓ(RTCCLK),Ñ¡ÔñLSE×÷ÎªRTCÊ±ÖÓ
            RCC_RTCCLKCmd(ENABLE);       //Ê¹ÄÜRTCÊ±ÖÓ

            RTC_WaitForLastTask();       //µÈ´ý×î½üÒ»´Î¶ÔRTC¼Ä´æÆ÷µÄÐ´²Ù×÷Íê³É
            RTC_WaitForSynchro();             //µÈ´ýRTC¼Ä´æÆ÷Í¬²½
            RTC_ITConfig(RTC_IT_SEC|RTC_IT_ALR, ENABLE);             //Ê¹ÄÜRTCÃëÖÐ¶ÏºÍÄÖÖÓÖÐ¶Ï
            RTC_WaitForLastTask();       //µÈ´ý×î½üÒ»´Î¶ÔRTC¼Ä´æÆ÷µÄÐ´²Ù×÷Íê³É

            RTC_EnterConfigMode();/// ÔÊÐíÅäÖÃ
            RTC_SetPrescaler(39999); //ÉèÖÃRTCÔ¤·ÖÆµµÄÖµ
            RTC_WaitForLastTask();       //µÈ´ý×î½üÒ»´Î¶ÔRTC¼Ä´æÆ÷µÄÐ´²Ù×÷Íê³É

      RTC_SetCounter(0);                         //??????0s
      /* Wait until last write operation on RTC registers has finished */
      RTC_WaitForLastTask();
      //????WORK_TIMES
      RTC_SetAlarm(10);
            RTC_WaitForLastTask();
            RTC_WaitForSynchro();
            RTC_ExitConfigMode(); //ÍË³öÅäÖÃÄ£Ê½


      RTC_NVIC_Config();//RCTÖÐ¶Ï·Ö×éÉèÖÃ
printf("Time is  =%d \r\n",RTC_GetCounter()); //???????
      return 0; //ok

}
//RTCÊ±ÖÓÖÐ¶Ï
//Ã¿Ãë´¥·¢Ò»´Î
extern int count;
void RTC_IRQHandler(void)
{
      if(RTC_GetITStatus(RTC_IT_SEC)!=RESET)
      {
printf("Time is  =%d \r\n",RTC_GetCounter()); //???????
      }

            RTC_ClearITPendingBit(RTC_IT_OW|RTC_IT_SEC);
            RTC_WaitForLastTask();
}
//ÄÖÖÓÖÐ¶Ï
void RTCAlarm_IRQHandler(void)
{
      if(RTC_GetITStatus(RTC_IT_ALR) != RESET)
      {
               printf("THE ALARM  READY =%d \r\n",RTC_GetCounter());//???????
                        RTC_ClearITPendingBit(RTC_IT_ALR);
                        PWR_BackupAccessCmd(ENABLE);
                        RTC_EnterConfigMode();
                        RTC_WaitForLastTask();
                        RTC_SetAlarm(10+RTC_GetCounter());       //???????40s?
                        RTC_WaitForLastTask();
                        RTC_ExitConfigMode();
                        PWR_BackupAccessCmd(DISABLE);
}

            EXTI_ClearITPendingBit(EXTI_Line17);
      RTC_WaitForLastTask();
            RTC_ClearITPendingBit(RTC_IT_ALR);
            RTC_WaitForLastTask();
}