不能同时配置RTC和USART中断优先级

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车水马龙|

楼主 | 2019-11-23 17:30 | 只看该作者回帖奖励

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中断优先级, RTC, USART, ic, vi

你好，我用ISO板子，在同时使用RTC和USART1中断时，发现中断优先级函数NVIC_Init(&NVIC_InitStructure);不能调用两次，如果调用两次程序就进入死循环了，什么原因？请帮忙，代码如下：
void RTC_NVIC_Config(void)
{
      NVIC_InitTypeDef NVIC_InitStructure;

      /* Configure one bit for preemption priority */
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

      /* Enable the RTC Interrupt */
      NVIC_InitStructure.NVIC_IRQChannel = RTC_IRQn ;//|SDIO_IRQn
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x000;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);

      /* Enable the USARTy Interrupt */
      NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x1;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x001;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
      NVIC_Init(&NVIC_InitStructure);

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