1.配置中断接收引脚
GPIO_InitTypeDef GPIO_InitStructure;EXTI_InitTypeDef EXTI_InitStructure;RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE);//AFIO时钟是为了开启端口的复用功能，详细如下图GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;GPIO_Init(GPIOB,&GPIO_InitStructure);//默认情况下信号灯打开GPIO_WriteBit(GPIOB,GPIO_Pin_0 ,(BitAction)(1));GPIO_WriteBit(GPIOB,GPIO_Pin_1 ,(BitAction)(1));/*****配置中断使用的IO*****/GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;GPIO_Init(GPIOA,&GPIO_InitStructure);//配置PA1外部中断/*****配置中断线，哪一组IO，这一组哪一条线作为终端入口0~15为GPIO_Pin_n，其余为RCC等*****/GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource2);//选择 GPIO 管脚用作外部中断线路,默认为缺省值EXTI_InitStructure.EXTI_Line = EXTI_Line2;/*****配置中断线的工作模式****/EXTI_InitStructure.EXTI_LineCmd = ENABLE;EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;EXTI_Init(&EXTI_InitStructure);//配置PA3外部中断GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource3);//选择哪个GPIO端口作为中断线（与GPIO_PinSourceX相连接）EXTI_InitStructure.EXTI_Line = EXTI_Line3;//上面那句函数说明了使用哪个GPIO，这句话是说：选择哪一条线，应该相当于GPIO_Pin_0EXTI_Init(&EXTI_InitStructure);AFIO时钟作用： 中断线设置依据：
2.配置NVIC
/*****************中断向量可以在stm32f10x.h中找到******************/NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;//配置中断向量NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;NVIC_Init(&NVIC_InitStructure);NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;NVIC_Init(&NVIC_InitStructure);配置优先级判据：
3.配置终中断响应函数：
/***************SendData是添加的响应函数*********************/void EXTI2_IRQHandler(void){SendData();EXTI_ClearITPendingBit(EXTI_Line2);}void EXTI3_IRQHandler(void){SendData();EXTI_ClearITPendingBit(EXTI_Line3);}中断响应函数如下：
/*****************在启动文件中，后缀.s文件**********************/__Vectors DCD __initial_sp ; Top of Stack DCD Reset_Handler ; Reset Handler DCD NMI_Handler ; NMI Handler DCD HardFault_Handler ; Hard Fault Handler DCD MemManage_Handler ; MPU Fault Handler DCD BusFault_Handler ; Bus Fault Handler DCD UsageFault_Handler ; Usage Fault Handler DCD 0 ; Reserved DCD 0 ; Reserved DCD 0 ; Reserved DCD 0 ; Reserved DCD SVC_Handler ; SVCall Handler DCD DebugMon_Handler ; Debug Monitor Handler DCD 0 ; Reserved DCD PendSV_Handler ; PendSV Handler DCD SysTick_Handler ; SysTick Handler ; External Interrupts DCD WWDG_IRQHandler ; Window Watchdog DCD PVD_IRQHandler ; PVD through EXTI Line detect DCD TAMPER_IRQHandler ; Tamper DCD RTC_IRQHandler ; RTC DCD FLASH_IRQHandler ; Flash DCD RCC_IRQHandler ; RCC DCD EXTI0_IRQHandler ; EXTI Line 0 DCD EXTI1_IRQHandler ; EXTI Line 1 DCD EXTI2_IRQHandler ; EXTI Line 2 DCD EXTI3_IRQHandler ; EXTI Line 3 DCD EXTI4_IRQHandler ; EXTI Line 4 DCD DMA1_Channel1_IRQHandler ; DMA1 Channel 1 DCD DMA1_Channel2_IRQHandler ; DMA1 Channel 2 DCD DMA1_Channel3_IRQHandler ; DMA1 Channel 3 DCD DMA1_Channel4_IRQHandler ; DMA1 Channel 4 DCD DMA1_Channel5_IRQHandler ; DMA1 Channel 5 DCD DMA1_Channel6_IRQHandler ; DMA1 Channel 6 DCD DMA1_Channel7_IRQHandler ; DMA1 Channel 7 DCD ADC1_2_IRQHandler ; ADC1_2 DCD USB_HP_CAN1_TX_IRQHandler ; USB High Priority or CAN1 TX DCD USB_LP_CAN1_RX0_IRQHandler ; USB Low Priority or CAN1 RX0 DCD CAN1_RX1_IRQHandler ; CAN1 RX1 DCD CAN1_SCE_IRQHandler ; CAN1 SCE DCD EXTI9_5_IRQHandler ; EXTI Line 9..5 DCD TIM1_BRK_IRQHandler ; TIM1 Break DCD TIM1_UP_IRQHandler ; TIM1 Update DCD TIM1_TRG_COM_IRQHandler ; TIM1 Trigger and Commutation DCD TIM1_CC_IRQHandler ; TIM1 Capture Compare DCD TIM2_IRQHandler ; TIM2 DCD TIM3_IRQHandler ; TIM3 DCD TIM4_IRQHandler ; TIM4 DCD I2C1_EV_IRQHandler ; I2C1 Event DCD I2C1_ER_IRQHandler ; I2C1 Error DCD I2C2_EV_IRQHandler ; I2C2 Event DCD I2C2_ER_IRQHandler ; I2C2 Error DCD SPI1_IRQHandler ; SPI1 DCD SPI2_IRQHandler ; SPI2 DCD USART1_IRQHandler ; USART1 DCD USART2_IRQHandler ; USART2 DCD USART3_IRQHandler ; USART3 DCD EXTI15_10_IRQHandler ; EXTI Line 15..10 DCD RTCAlarm_IRQHandler ; RTC Alarm through EXTI Line DCD USBWakeUp_IRQHandler ; USB Wakeup from suspend外部中断线有：
DCD EXTI0_IRQHandler ; EXTI Line 0 DCD EXTI1_IRQHandler ; EXTI Line 1 DCD EXTI2_IRQHandler ; EXTI Line 2 DCD EXTI3_IRQHandler ; EXTI Line 3 DCD EXTI4_IRQHandler ; EXTI Line 4 DCD EXTI9_5_IRQHandler ; EXTI Line 9..5 DCD EXTI15_10_IRQHandler ; EXTI Line 15..10