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1、1.使能SYSSCFG和对应GPIO时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOx, ENABLE);2.配置对应GPIO为输入模式 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_x; GPIO_Init(GPIOx,&GP
2、IO_InitStructure);3.配置对应GPIO为EXIT线 SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOx, EXTI_PinSourcex); 4.配置EXIT旳工作参数 EXTI_InitStructure.EXTI_Line = EXTI_Linex; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;/中断，EXTI_Mode_Event为事件 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;/下降沿，EXTI_Trigger
3、_Rising为上升沿，EXTI_Trigger_Rising_Falling双跳边缘 EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure);5.配置NVIC中旳EXTI中断线 NVIC_InitStructure.NVIC_IRQChannel = EXTIx_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = xx； NVIC_InitStructure.NVIC_IRQChannelSubPriority = xx; NVIC_
4、InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); 程序举例：int main(void) GPIO_InitTypeDef GPIO_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GP
5、IOC, ENABLE); RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_SYSCFG, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7 | GPIO_Pin_8 ; /led GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO
6、_Speed = GPIO_Speed_100MHz; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(GPIOF, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_5; GPIO_Init(GPIOA,&GPIO_InitStructure
7、); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; GPIO_Init(GPIOC,&GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_Init(GPIOF,&GPIO_InitStructure); SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource0); EXTI_InitStructure.EXTI_Line = EXTI_Line0; EXTI_InitStructure.EXTI_Mode =
8、 EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;/优先级最低 NVIC_InitStructure.NVIC_IRQChann
9、elSubPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOA, EXTI_PinSource5); EXTI_InitStructure.EXTI_Line = EXTI_Line5; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Tr
10、igger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;/优先级最低 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelCmd =
11、 ENABLE; NVIC_Init(&NVIC_InitStructure); SYSCFG_EXTILineConfig(EXTI_PortSourceGPIOF, EXTI_PinSource11); EXTI_InitStructure.EXTI_Line = EXTI_Line11; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EX
12、TI_Init(&EXTI_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;/优先级最低 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); SYSCFG_EXTILineC
13、onfig(EXTI_PortSourceGPIOC, EXTI_PinSource13); EXTI_InitStructure.EXTI_Line = EXTI_Line13; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;/优先级最低 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); GPIO_SetBits(GPIOF, GPIO_Pin_7 | GPI
