STM32中断看这一篇就够了

typedef struct {
    __IO uint32_t ISER[8];       // 中断使能寄存器
    uint32_t RESERVED0[24];
    __IO uint32_t ICER[8];       // 中断清除寄存器
    uint32_t RSERVED1[24];
    __IO uint32_t ISPR[8];       // 中断使能悬起寄存器
    uint32_t RESERVED2[24];
    __IO uint32_t ICPR[8];       // 中断清除悬起寄存器
    uint32_t RESERVED3[24];
    __IO uint32_t IABR[8];       // 中断有效位寄存器
    uint32_t RESERVED4[56];
    __IO uint8_t  IP[240];       // 中断优先级寄存器(8Bit wide)
    uint32_t RESERVED5[644];
    __O  uint32_t STIR;          // 软件触发中断寄存器
}  NVIC_Type;

typedef struct {
    uint8_t NVIC_IRQChannel;                    // 中断源
    uint8_t NVIC_IRQChannelPreemptionPriority;  // 抢占优先级
    uint8_t NVIC_IRQChannelSubPriority;         // 子优先级
    FunctionalState NVIC_IRQChannelCmd;         // 中断使能或者失能
} NVIC_InitTypeDef;

typedef struct {
    uint32_t EXTI_Line;                 // 中断/事件线
    EXTIMode_TypeDef EXTI_Mode;         // EXTI模式
    EXTITrigger_TypeDef EXTI_Trigger;   // 触发类型
    FunctionalState EXTI_LineCmd;       // EXTI使能
} EXTI_InitTypeDef;

//引脚定义
#define KEY1_INT_GPIO_PORT         GPIOA
#define KEY1_INT_GPIO_CLK          (RCC_APB2Periph_GPIOA\
                                    |RCC_APB2Periph_AFIO)
#define KEY1_INT_GPIO_PIN          GPIO_Pin_0
#define KEY1_INT_EXTI_PORTSOURCE   GPIO_PortSourceGPIOA
#define KEY1_INT_EXTI_PINSOURCE    GPIO_PinSource0
#define KEY1_INT_EXTI_LINE         EXTI_Line0
#define KEY1_INT_EXTI_IRQ          EXTI0_IRQn

#define KEY1_IRQHandler            EXTI0_IRQHandler


#define KEY2_INT_GPIO_PORT         GPIOC
#define KEY2_INT_GPIO_CLK          (RCC_APB2Periph_GPIOC\
                                    |RCC_APB2Periph_AFIO)
#define KEY2_INT_GPIO_PIN          GPIO_Pin_13
#define KEY2_INT_EXTI_PORTSOURCE   GPIO_PortSourceGPIOC
#define KEY2_INT_EXTI_PINSOURCE    GPIO_PinSource13
#define KEY2_INT_EXTI_LINE         EXTI_Line13
#define KEY2_INT_EXTI_IRQ          EXTI15_10_IRQn

static void NVIC_Configuration(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;

    /* 配置NVIC为优先级组1 */
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);

    /* 配置中断源：按键1 */
    NVIC_InitStructure.NVIC_IRQChannel = KEY1_INT_EXTI_IRQ;
    /* 配置抢占优先级：1 */
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    /* 配置子优先级：1 */
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    /* 使能中断通道 */
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    /* 配置中断源：按键2，其他使用上面相关配置 */
    NVIC_InitStructure.NVIC_IRQChannel = KEY2_INT_EXTI_IRQ;
    NVIC_Init(&NVIC_InitStructure);
}

void EXTI_Key_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
    EXTI_InitTypeDef EXTI_InitStructure;

    /*开启按键GPIO口的时钟*/
    RCC_APB2PeriphClockCmd(KEY1_INT_GPIO_CLK,ENABLE);

    /* 配置 NVIC 中断*/
    NVIC_Configuration();

    /*--------------------------KEY1配置---------------------*/
    /* 选择按键用到的GPIO */
    GPIO_InitStructure.GPIO_Pin = KEY1_INT_GPIO_PIN;
    /* 配置为浮空输入 */
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(KEY1_INT_GPIO_PORT, &GPIO_InitStructure);

    /* 选择EXTI的信号源 */
    GPIO_EXTILineConfig(KEY1_INT_EXTI_PORTSOURCE, \
                        KEY1_INT_EXTI_PINSOURCE);
    EXTI_InitStructure.EXTI_Line = KEY1_INT_EXTI_LINE;

    /* EXTI为中断模式 */
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    /* 上升沿中断 */
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    /* 使能中断 */
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);

    /*--------------------------KEY2配置------------------*/
    /* 选择按键用到的GPIO */
    GPIO_InitStructure.GPIO_Pin = KEY2_INT_GPIO_PIN;
    /* 配置为浮空输入 */
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(KEY2_INT_GPIO_PORT, &GPIO_InitStructure);

    /* 选择EXTI的信号源 */
    GPIO_EXTILineConfig(KEY2_INT_EXTI_PORTSOURCE, \
                        KEY2_INT_EXTI_PINSOURCE);
    EXTI_InitStructure.EXTI_Line = KEY2_INT_EXTI_LINE;

    /* EXTI为中断模式 */
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    /* 下降沿中断 */
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
    /* 使能中断 */
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_Init(&EXTI_InitStructure);
}

void KEY1_IRQHandler(void)
{
    //确保是否产生了EXTI Line中断
    if (EXTI_GetITStatus(KEY1_INT_EXTI_LINE) != RESET) {
        // LED1 取反
        LED1_TOGGLE;
        //清除中断标志位
        EXTI_ClearITPendingBit(KEY1_INT_EXTI_LINE);
    }
}

void KEY2_IRQHandler(void)
{
    //确保是否产生了EXTI Line中断
    if (EXTI_GetITStatus(KEY2_INT_EXTI_LINE) != RESET) {
        // LED2 取反
        LED2_TOGGLE;
        //清除中断标志位
        EXTI_ClearITPendingBit(KEY2_INT_EXTI_LINE);
    }
}