stm32f030关闭和打开外部中断的库函数

下面是STM32F030的外部中断控制库函数示例：

#include "stm32f0xx.h"
#include "stm32f0xx_exti.h"
#include "stm32f0xx_rcc.h"

void EXTI0_Config(void)
{
  EXTI_InitTypeDef   EXTI_InitStructure;
  GPIO_InitTypeDef   GPIO_InitStructure;
  
  /* Enable GPIOA clock */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
  /* Configure PA0 pin as input floating */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
  
  /* Enable SYSCFG clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE);
  /* Connect EXTI0 Line to PA0 pin */
  SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0);
  
  /* Configure EXTI0 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line0;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
}

void EXTI0_IRQHandler(void)
{
  if(EXTI_GetITStatus(EXTI_Line0) != RESET)
  {
    /* Clear the EXTI line 0 pending bit */
    EXTI_ClearITPendingBit(EXTI_Line0);
    /* Your code here */
  }
}

void EXTI0_Disable(void)
{
  EXTI_InitTypeDef   EXTI_InitStructure;
  
  /* Disable EXTI0 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line0;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
  EXTI_InitStructure.EXTI_LineCmd = DISABLE;
  EXTI_Init(&EXTI_InitStructure);
}

void EXTI0_Enable(void)
{
  EXTI_InitTypeDef   EXTI_InitStructure;
  
  /* Enable EXTI0 line */
  EXTI_InitStructure.EXTI_Line = EXTI_Line0;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
}

在上述示例中，`EXTI0_Config()`函数配置了PA0引脚为输入模式、设置为无上下拉电阻，并将其连接到外部中断0线。然后，使能外部中断0线并配置其触发方式为上升沿和下降沿触发中断。`EXTI0_IRQHandler()`函数为外部中断0的中断处理函数，当该中断触发时，该函数将被执行。`EXTI0_Disable()`和`EXTI0_Enable()`函数用于分别禁用和使能外部中断0线。