标准库按键中断

Posted 2020-12-04 zoute

由于中文注释所以插入截图作为参考

 

#include "stm32f10x_it.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x.h"
#include "stm32f10x_exti.h"
#include "Button.h"
#include "Led.h"
void init_Button(){

    //????PA0?D??òy??
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//éè??ê±?ó
    GPIO_InitTypeDef button_structer;//?¨ò??á11ì?
    button_structer.GPIO_Speed = GPIO_Speed_50MHz;//éè??òy??μ??￠D??ù?è
    button_structer.GPIO_Mode  = GPIO_Mode_IN_FLOATING;     //????ê?è?
    button_structer.GPIO_Pin   = GPIO_Pin_0;
    GPIO_Init(GPIOA,&button_structer);//3?ê??ˉGPIOA PA0
    
    //?D??′|àíoˉêy ía2??D??
    /* 1????ê±?ó 
         2 GPIO1¤×÷·?ê? 
         3NVIC?D??ó??è?? (ó??è??·?×é￡?×ó/?÷ó??è???3?μ)
         4EXTIía2??D?????? (????￡?extiê1?ü)
         5?D??′|àíoˉêy*/
    
    //NVICó??è??????
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);//ó??è??·?×é 0-4ê1?àá￠μ? 9-5 15-10
    NVIC_InitTypeDef nvic;                                            
    nvic.NVIC_IRQChannelCmd                = ENABLE;            //ê1?ü
    nvic.NVIC_IRQChannelPreemptionPriority = 0;                     //?÷ó??è?????? 0-15
    nvic.NVIC_IRQChannelSubPriority        = 0;                        //×óó??è?????? 0
    nvic.NVIC_IRQChannel                   = EXTI0_IRQn;    //?????D??o? PA0  ?a 0  
    NVIC_Init(&nvic);                                                                            //3?ê??ˉ?D??
    
    //ía2??D??????
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
    EXTI_InitTypeDef exti;                                            //?D???á11ì?
    exti.EXTI_Line    = EXTI_Line0;                            // í¨μà???·
    exti.EXTI_LineCmd = ENABLE;                                     // ?D??ê1?ü
    exti.EXTI_Mode    = EXTI_Mode_Interrupt;        //1¤×÷?￡ê?éè???a?D???￡ê?
    exti.EXTI_Trigger = EXTI_Trigger_Falling;        //???μ??′￥·￠?D??
    EXTI_Init(&exti);
    GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);//°??D??ó?òy??á??ó?eà′
    
    
    
        //????PC13?D??òy??
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);//éè??ê±?ó
    GPIO_InitTypeDef button_structer1;//?¨ò??á11ì?
    button_structer1.GPIO_Speed = GPIO_Speed_50MHz;//éè??òy??μ??￠D??ù?è
    button_structer1.GPIO_Mode  = GPIO_Mode_IN_FLOATING;     //????ê?è?
    button_structer1.GPIO_Pin   = GPIO_Pin_13;
    GPIO_Init(GPIOC,&button_structer1);//3?ê??ˉGPIOA PA0
    
    
    
}
void EXTI0_IRQHandler(){//?D??′|àíoˉêy
    int i;
    
    if(EXTI_GetFlagStatus(EXTI_Line0) != RESET){
        Led_Red_On();
        for(i = 0;i<1000000;i++);
        Led_Red_Off();
        for(i = 0;i<1000000;i++);    
        //??3y?D??±ê????
        EXTI_ClearITPendingBit(EXTI_Line0);
    }
    
}
void EXTI15_10_IRQHandler(){//?D??′|àíoˉêy
    int i;
    
    if(EXTI_GetFlagStatus(EXTI_Line0) != RESET){
        Led_Red_On();
        for(i = 0;i<1000000;i++);
        Led_Red_Off();
        for(i = 0;i<1000000;i++);    
        //??3y?D??±ê????
        EXTI_ClearITPendingBit(EXTI_Line0);
    }
    
}

 主函数运行

 

#include "stm32f10x_it.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x.h"
#include "Led.h"
#include "Button.h"
#include "Uart.h"
int main(){
    init_Button();//按键初始化
    while(1);
    return 0;
}

现象