落叶随风 发表于 2016-8-16 15:40
你开了RTC的一个中断了吧，跳进了默认的RTC的一个IRQHandler

我发现是初始化了EXTI_Line17就会出现这种情况，但是不初始化EXTI_Line17正常的闹钟还是进不去

EXTI line 17 is connected to the RTC Alarm event.

所以要自己写一下RTC_IRQHandler中对RTC_IT_ALRA中断的处理

下面是我在STM32F051中用的秒中断设置:
/**
  * @brief  This function configures the RTC Alarm.
  * @param  None
  * @retval None
  */
void RTC_AlarmConfig(void)
{
        EXTI_InitTypeDef EXTI_InitStructure;
        RTC_AlarmTypeDef RTC_AlarmStructure;
        NVIC_InitTypeDef NVIC_InitStructure;

//        RTC_AlarmStructInit(&RTC_AlarmStructure);
   
  /* EXTI configuration */
        EXTI_ClearITPendingBit(EXTI_Line17);
        EXTI_InitStructure.EXTI_Line = EXTI_Line17;
        EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
        EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
        EXTI_InitStructure.EXTI_LineCmd = ENABLE;
        EXTI_Init(&EXTI_InitStructure);
  
  /* Enable the RTC Alarm Interrupt */
        NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);

  /* Set the alarmA Masks */
        RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_All;
        RTC_SetAlarm(RTC_Format_BCD, RTC_Alarm_A, &RTC_AlarmStructure);
  
  /* Set AlarmA subseconds and enable SubSec Alarm : generate 1 interripts per Second */
        RTC_AlarmSubSecondConfig(RTC_Alarm_A, 0xFF, RTC_AlarmSubSecondMask_SS14_8);

  /* Enable AlarmA interrupt */
        RTC_ITConfig(RTC_IT_ALRA, ENABLE);
  /* Enable the alarm  A */
        RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
}


这是秒中断
void RTC_IRQHandler(void)
{
        if(RTC_GetITStatus(RTC_IT_ALRA) != RESET)
        {
                RTC_TotalSeconds++;
                RTC_ClearITPendingBit(RTC_IT_ALRA);        /* Clear RTC AlarmA Flags */
        }
        EXTI_ClearITPendingBit(EXTI_Line17);        /* Clear the EXTIL line 17 */
}

另外我在调试的过程中发现STM32F0的固件库里有一处错误，和RTC相关的中断标志位宏定义有错，具体看下图

轻若尘 发表于 2016-8-17 15:40
另外我在调试的过程中发现STM32F0的固件库里有一处错误，和RTC相关的中断标志位宏定义有错，具体看下图 ...

固件库应该是对的吧

1. /**
   
2.   * @brief  Enables or disables the specified RTC interrupts.
   
3.   * @param  RTC_IT: specifies the RTC interrupt sources to be enabled or disabled.
   
4.   *          This parameter can be any combination of the following values:
   
5.   *            @arg RTC_IT_TS:  Time Stamp interrupt mask
   
6.   *            @arg RTC_IT_ALRA:  Alarm A interrupt mask
   
7.   *            @arg RTC_IT_TAMP: Tamper event interrupt mask
   
8.   * @param  NewState: new state of the specified RTC interrupts.
   
9.   *          This parameter can be: ENABLE or DISABLE.
   
10.   * @retval None
    
11.   */
    
12. void RTC_ITConfig(uint32_t RTC_IT, FunctionalState NewState)
    
13. {
    
14.   /* Check the parameters */
    
15.   assert_param(IS_RTC_CONFIG_IT(RTC_IT));
    
16.   assert_param(IS_FUNCTIONAL_STATE(NewState));
    
17. 
    
18.   /* Disable the write protection for RTC registers */
    
19.   RTC->WPR = 0xCA;
    
20.   RTC->WPR = 0x53;
    
21. 
    
22.   if (NewState != DISABLE)
    
23.   {
    
24.     /* Configure the Interrupts in the RTC_CR register */
    
25.     RTC->CR |= (uint32_t)(RTC_IT & ~RTC_TAFCR_TAMPIE);
    
26.     /* Configure the Tamper Interrupt in the RTC_TAFCR */
    
27.     RTC->TAFCR |= (uint32_t)(RTC_IT & RTC_TAFCR_TAMPIE);
    
28.   }
    
29.   else
    
30.   {
    
31.     /* Configure the Interrupts in the RTC_CR register */
    
32.     RTC->CR &= (uint32_t)~(RTC_IT & (uint32_t)~RTC_TAFCR_TAMPIE);
    
33.     /* Configure the Tamper Interrupt in the RTC_TAFCR */
    
34.     RTC->TAFCR &= (uint32_t)~(RTC_IT & RTC_TAFCR_TAMPIE);
    
35.   }
    
36.   /* Enable the write protection for RTC registers */
    
37.   RTC->WPR = 0xFF;
    
38. }

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固件库RTC_ITConfig写的是RTC_CR

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2016-8-18 14:42 上传

1. /**
   
2.   * @brief  Checks whether the specified RTC interrupt has occurred or not.
   
3.   * @param  RTC_IT: specifies the RTC interrupt source to check.
   
4.   *          This parameter can be one of the following values:
   
5.   *            @arg RTC_IT_TS: Time Stamp interrupt
   
6.   *            @arg RTC_IT_ALRA: Alarm A interrupt
   
7.   *            @arg RTC_IT_TAMP1: Tamper1 event interrupt
   
8.   *            @arg RTC_IT_TAMP2: Tamper2 event interrupt
   
9.   * @retval The new state of RTC_IT (SET or RESET).
   
10.   */
    
11. ITStatus RTC_GetITStatus(uint32_t RTC_IT)
    
12. {
    
13.   ITStatus bitstatus = RESET;
    
14.   uint32_t tmpreg = 0, enablestatus = 0;
    
15. 
    
16.   /* Check the parameters */
    
17.   assert_param(IS_RTC_GET_IT(RTC_IT));
    
18.   
    
19.   /* Get the TAMPER Interrupt enable bit and pending bit */
    
20.   tmpreg = (uint32_t)(RTC->TAFCR & (RTC_TAFCR_TAMPIE));
    
21. 
    
22.   /* Get the Interrupt enable Status */
    
23.   enablestatus = (uint32_t)((RTC->CR & RTC_IT) | (tmpreg & ((RTC_IT >> (RTC_IT >> 18)) >> 15)));
    
24.   
    
25.   /* Get the Interrupt pending bit */
    
26.   [color=Red]tmpreg = (uint32_t)((RTC->ISR & (uint32_t)(RTC_IT >> 4)));[/color]
    
27.   
    
28.   /* Get the status of the Interrupt */
    
29.   if ((enablestatus != (uint32_t)RESET) && ((tmpreg & 0x0000FFFF) != (uint32_t)RESET))
    
30.   {
    
31.     bitstatus = SET;
    
32.   }
    
33.   else
    
34.   {
    
35.     bitstatus = RESET;
    
36.   }
    
37.   return bitstatus;
    
38. }
    

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在RTC_GetITStatus中，读了RTC_ISR并与RTC_IT值右移4位相与