STM32F303 I/O口中断配置指导

2019-07-14 14:59发布

将PA.9配置为外部中断，新人上手，求大神指导一下下面的配置对不对

void EXti_Configuration(void)
{
      EXTI_InitTypeDef EXTI_InitStructure;
      NVIC_InitTypeDef NVIC_InitStructure;
      GPIO_InitTypeDef       GPIO_InitStructure;

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
      GPIO_Init(GPIOA,&GPIO_InitStructure);

      SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA,EXTI_PinSource9);
      EXTI_InitStructure.EXTI_Line = EXTI_Line9;
      EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;    //
      EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
      EXTI_InitStructure.EXTI_LineCmd = ENABLE;
      EXTI_Init(&EXTI_InitStructure);

      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
      NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
      NVIC_InitStructure.NVIC_IRQChannel = ENABLE;
      NVIC_Init(&NVIC_InitStructure);
}

中断入口函数是void EXTI9_5_IRQHandler(void)吗？
急...........在线等...........

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