#include <sys.h> #include <EXTI.h> #include <led.h> int main(void) { NVIC_Configuration(); Led_init(); EXTI_KEY_init(); while(1) { } } void EXTI15_10_IRQHandler(void) { if(EXTI_GetFlagStatus(EXTI_Line10)==1) { LED=0; EXTI_ClearFlag(EXTI_Line10); } if(EXTI_GetFlagStatus(EXTI_Line11)==1) { LED=1; EXTI_ClearFlag(EXTI_Line11); } } #include <EXTI.h> void EXTI_KEY_init(void) { GPIO_InitTypeDef GPIO_InitStructure; EXTI_InitTypeDef EXTI_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; //配置PB11、PB11为下降沿触发 //配置管脚时钟和复用时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO,ENABLE); //配置GPIO口为上拉输入 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_10; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU; GPIO_Init(GPIOB, &GPIO_InitStructure); //配置GPIO口为 外部中断模式 GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource11); GPIO_EXTILineConfig(GPIO_PortSourceGPIOB, GPIO_PinSource10); //配置EXTI中断触发模式 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; EXTI_Init(&EXTI_InitStructure); EXTI_InitStructure.EXTI_Line = EXTI_Line10; EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStructure.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStructure); //配置EXTI的中断优先级 NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); } #include <led.h> //PC13 void Led_init(void) { GPIO_InitTypeDef GPIO_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOC, &GPIO_InitStructure); } 
文章来源: 按键点亮LED灯（中断）