1 2 3 4 5 6 7 8 9 10 11 | #ifndef __EXTI_H__#define __EXTI_H__#include "stm32f10x.h"#include "MyTime.h"#include "bitband.h"void EXTI_Configuration(void);void EXTI2_IRQHandler(void) ;#endif |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | #include "exti.h"#include "key.h"void EXTI_Configuration(void){ EXTI_InitTypeDef EXTI_InitStruct; NVIC_InitTypeDef NVIC_InitStruct; //1）初始化 IO 口为输入 KEY_Configuration(); //2）开启 IO 口复用时钟，设置 IO 口与中断线的映射关系。 RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource2); //3）初始化线上中断，设置触发条件等 EXTI_InitStruct.EXTI_Line = EXTI_Line2; EXTI_InitStruct.EXTI_Mode = EXTI_Mode_Interrupt; EXTI_InitStruct.EXTI_Trigger = EXTI_Trigger_Falling; EXTI_InitStruct.EXTI_LineCmd = ENABLE; EXTI_Init(&EXTI_InitStruct); //4）配置中断分组（NVIC），并使能中断 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); NVIC_InitStruct.NVIC_IRQChannel = EXTI2_IRQn; NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 2; NVIC_InitStruct.NVIC_IRQChannelSubPriority = 2; NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStruct);} //5）编写中断服务函数。 void EXTI2_IRQHandler(void) { MyDelay_ms(10); //消抖 if(KEY2==0) //按键KEY2 { LED0=!LED0; } EXTI_ClearITPendingBit(EXTI_Line2); //清除 LINE2 上的中断标志位 } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | #include "MyTime.h"#include "exti.h"int main(void){ MySysTick_Init(); //点亮灯 GPIO_Configuration(); EXTI_Configuration(); while(1); } |
1 2 3 4 5 | 1）初始化 IO 口为输入。 //KEY_Configuration2）开启 IO 口复用时钟，设置 IO 口与中断线的映射关系。 3）初始化线上中断，设置触发条件等。 4）配置中断分组（NVIC），并使能中断。 5）编写中断服务函数。 |
原文：http://blog.csdn.net/johnsuna/article/details/45130543