STM32公共中断端口如何配置

void KEY_Init(void) //IO初始化

{ 

     GPIO_InitTypeDef GPIO_InitStructure;

     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//使能PORTA,PORTE时钟

    GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;//KEY0-KEY1

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; //设置成上拉输入

    GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

     GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA 5.6.7

}

 void EXITTI_Init(void)

{

EXTI_InitTypeDef EXTI_InitStructure;    //定义一个EXTI结构体变量

NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);    //使能IO复用功能，使用中断功能重要！！！

    KEY_Init();

/* 引脚选择 */

GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource5|GPIO_PinSource6|GPIO_PinSource7);//配置端口C的13引脚为中断源

/* 设置外部中断结构体的成员*/

EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;    //中断模式为中断模式

EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;    //下降沿触发

EXTI_InitStructure.EXTI_Line = EXTI_Line5 | EXTI_Line6|EXTI_Line7;

EXTI_InitStructure.EXTI_LineCmd = ENABLE;    //使能中断线

EXTI_Init(&EXTI_InitStructure);    //根据参数初始化中断寄存器

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);    //设置中断优先级分组2

NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;    //设定中断源为PC13

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;    //中断占优先级为2

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;    //副优先级为0

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;    //使能中断

NVIC_Init(&NVIC_InitStructure);    //根据参数初始化中断寄存器

}

void EXTI19_5_IRQHandler(void)

{

if(EXTI_GetITStatus(EXTI_Line5) != RESET)

  {

        delay_ms(10);//消抖

    if(KEY0==0)

    {                 

        printf("555");

        LED1=!LED1;    

    }

     /* Clear the Key Button EXTI line pending bit */

    EXTI_ClearITPendingBit(EXTI_Line5);

  }

  else if(EXTI_GetITStatus(EXTI_Line6 )!= RESET)

  {

    delay_ms(10);//消抖

        printf("666");

    if(KEY1==0)          

    {                 

        LED0=!LED0;

    /* Clear the Key Button EXTI line pending bit */

    EXTI_ClearITPendingBit(EXTI_Line6);

  }

  else if(EXTI_GetITStatus(EXTI_Line7 )!= RESET)

  {

        printf("777");

    EXTI_ClearITPendingBit(EXTI_Line7);

}

}