【求助】STM32F042 RTC中断问题

bao19830224

各位，小弟刚接触Cortex-M0核单片机，用的是STM32F042.在使用RTC Alarm功能时，遇到问题，先贴源码

//初始化
void RTC_init(void)
{
        RTC_InitTypeDef RTC_InitStructure;
        EXTI_InitTypeDef EXTI_InitStructure;
        NVIC_InitTypeDef NVIC_InitStructure;

        //Enable the LSI OSC
        RCC_LSICmd(ENABLE);
        while(RCC_GetFlagStatus(RCC_FLAG_LSIRDY) == RESET)
        {
        }
        //40k
        RCC_RTCCLKConfig(RCC_RTCCLKSource_LSI);
        RCC_RTCCLKCmd(ENABLE);
        RTC_WaitForSynchro();

        //时基配置-1s
        RTC_InitStructure.RTC_AsynchPrediv = 0x63;
        RTC_InitStructure.RTC_SynchPrediv = 0x18F;
        RTC_InitStructure.RTC_HourFormat = RTC_HourFormat_24;

        RTC_Init(&RTC_InitStructure);

        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);
       
        NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelPriority = 2;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);
}

//校准时钟为: 00:01:00
void RTC_TimeRegulate(void)
{
        RTC_TimeTypeDef RTC_TimeStructure;

        RTC_TimeStructure.RTC_H12 = RTC_H12_AM;
        RTC_TimeStructure.RTC_Hours = 0x00;
        RTC_TimeStructure.RTC_Minutes = 0x01;
        RTC_TimeStructure.RTC_Seconds = 0x00;

        RTC_SetTime(RTC_Format_BIN, &RTC_TimeStructure);
}

//闹钟设置
void RTC_TimeAlarm(u8 tInterval)
{
        RTC_AlarmTypeDef  RTC_AlarmStructure;

        RTC_AlarmStructure.RTC_AlarmTime.RTC_H12 = RTC_H12_AM;
        RTC_AlarmStructure.RTC_AlarmTime.RTC_Minutes = tInterval;

        //屏蔽天数、小时和秒
        RTC_AlarmStructure.RTC_AlarmMask = RTC_AlarmMask_DateWeekDay|RTC_AlarmMask_Hours|RTC_AlarmMask_Seconds;
        RTC_SetAlarm(RTC_Format_BIN, RTC_Alarm_A, &RTC_AlarmStructure);       

        //中断
        RTC_ITConfig(RTC_IT_ALRA, ENABLE);
        RTC_AlarmCmd(RTC_Alarm_A, ENABLE);
}

int main(void)
{
        RTC_init();
        RTC_TimeRegulate();
        //1min中断一次
        RTC_TimeAlarm(0x01);
        while(1);
}

void RTC_IRQHandler(void)
{
        RTC_ClearITPendingBit(RTC_IT_ALRA);
       EXTI_ClearITPendingBit(EXTI_Line17);
        //...
}

实现的功能是：1min进一次RTC中断处理业务。但是运行的结果是进不了中断！

请各位帮忙看看问题出在哪里？谢谢

bao19830224

今天上午换了块板子，可以进中断了。应该是硬件的问题

正点原子

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