SMT32單片機(jī)的按鍵中斷控制LED燈亮滅的問題

ID:462723 · 發(fā)表于 2019-4-3 15:22

使4個按鍵中斷來控制兩個LED的亮滅。
led1 連接    PA(0)    一直閃爍提示系統(tǒng)正常工作
led2 連接    PA(1)
led3 連接    PA(2)

K_UP       連接 PB(0)  按一下控制led2 亮
K_DOWN  連接 PB(1)  按一下控制led2 滅
K_LEFT 連接    PB(2) 按一下控制led3 亮
K_RIGHT  連接 PB(3) 按一下控制led3 滅

編寫的程序編譯后沒有錯誤和警告。下載在開發(fā)板后，led1一直閃爍提示系統(tǒng)正常工作,按一下K_UP鍵led2亮，再按一下K_DOWN鍵led2滅。但是按K_LEFT和K_RIGHT沒反應(yīng)，無法控制led3的亮滅。請那位高手幫忙看下下面程序有什么問題？

MAIN.C

#include "system.h"
#include "led.h"
#include "SysTick.h"
#include "key.h"
#include "exti.h"

int main()
{
      u8 i=0;
      SysTick_Init(72);
      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
      LED_Init();
  KEY_Init();
      My_EXTI_Init();

      while(1)
      {

            i++;
            if(i%20==0)
            {
                     led1=!led1;
            }
            delay_ms(10);
      }

}

EXTI.C
#include "exti.h"
#include "Systick.h"
#include "led.h"
#include "key.h"

void My_EXTI_Init()
{
      NVIC_InitTypeDef NVIC_InitStructure;
      EXTI_InitTypeDef EXTI_InitStructure;


      RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource0);
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource1)
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource2)
      GPIO_EXTILineConfig(GPIO_PortSourceGPIOB,GPIO_PinSource3)

      NVIC_InitStructure.NVIC_IRQChannel=EXTI0_IRQn
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority=3
      NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
      NVIC_Init(&NVIC_InitStructure);


      NVIC_InitStructure.NVIC_IRQChannel=EXTI1_IRQn
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2
      NVIC_InitStructure.NVIC_IRQChannelSubPriority=2
      NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
      NVIC_Init(&NVIC_InitStructure);


      NVIC_InitStructure.NVIC_IRQChannel=EXTI2_IRQn
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2
      NVIC_InitStructure.NVIC_IRQChannelSubPriority=1;
      NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
      NVIC_Init(&NVIC_InitStructure);

      NVIC_InitStructure.NVIC_IRQChannel=EXTI3_IRQn;

      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
      NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
      NVIC_Init(&NVIC_InitStructure);

      EXTI_InitStructure.EXTI_Line=EXTI_Line0|EXTI_Line1|EXTI_Line2|EXTI_Line3;
      EXTI_InitStructure.EXTI_Mode=EXTI_Mode_Interrupt;
      EXTI_InitStructure.EXTI_Trigger=EXTI_Trigger_Falling;
      EXTI_InitStructure.EXTI_LineCmd=ENABLE;
      EXTI_Init(&EXTI_InitStructure);

}

void EXTI0_IRQHandler(void)
{
      if(EXTI_GetITStatus(EXTI_Line0)==1)
      {
            delay_ms(10);
            if(K_UP==0)
            {
                     led2=1;
            }

      }
      EXTI_ClearITPendingBit(EXTI_Line0);
}

void EXTI1_IRQHandler(void)
{
      if(EXTI_GetITStatus(EXTI_Line1)==1)
      {
            delay_ms(10);
            if(K_DOWN==0)
            {
                     led2=0;
            }

      }
      EXTI_ClearITPendingBit(EXTI_Line1);
}

void EXTI2_IRQHandler(void)
{
      if(EXTI_GetITStatus(EXTI_Line2)==1)
      {
            delay_ms(10);
            if(K_LEFT==0)
            {
                     led3=1;
            }

      }
      EXTI_ClearITPendingBit(EXTI_Line2);
}

void EXTI3_IRQHandler(void)
{
      if(EXTI_GetITStatus(EXTI_Line3)==1)
      {
            delay_ms(10);
            if(K_RIGHT==0)
            {
                     led3=0;
            }

      }
      EXTI_ClearITPendingBit(EXTI_Line3);
}

EXTI.H
#ifndef _exti_H
#define _exti_H

#include "system.h"

void My_EXTI_Init(void);

#endif

LED.C
#include "led.h"
#include "system.h"

void LED_Init()
{
      GPIO_InitTypeDef GPIO_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
      GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
      GPIO_Init(GPIOA,&GPIO_InitStructure);

      GPIO_ResetBits(GPIOA,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2);

}

LED.H
#ifndef _led_H
#define _led_H

#include "system.h"

void LED_Init(void);

#define led1 PAout(0)
#define led2 PAout(1)
#define led3 PAout(2)

#endif

KEY.C
#include "key.h"
#include "SysTick.h"

void KEY_Init()
{
      GPIO_InitTypeDef GPIO_InitStructure;

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IPU;
      GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
      GPIO_Init(GPIOB,&GPIO_InitStructure);


}

u8 KEY_Scan(u8 mode)
{
      static u8 key=1;
      if(key==1&&(K_UP==0||K_DOWN==0||K_LEFT==0||K_RIGHT==0))
      {
            delay_ms(10);
            key=0;
            if(K_UP==0)
            {
                     return KEY_UP;
            }
            else if(K_DOWN==0)
            {
                     return KEY_DOWN;
            }
            else if(K_LEFT==0)
            {
                     return KEY_LEFT;
            }
            else if(K_RIGHT==0)
            {
                     return KEY_RIGHT;
            }
      }
      else if(K_UP==1&&K_DOWN==1&&K_LEFT==1&&K_RIGHT==1)
      {
            key=1;
      }
      if(mode==1)
      {
            key=1;
      }
      return 0;
}

KEY.H
#ifndef _key_H
#define _key_H

#include "system.h"

void KEY_Init(void);
u8 KEY_Scan(u8 mode);

#define K_UP PBin(0)
#define K_DOWN  PBin(1)
#define K_LEFT  PBin(2)
#define K_RIGHT PBin(3)

#define KEY_UP                1
#define KEY_DOWN       2
#define KEY_LEFT       3
#define KEY_RIGHT 4

#endif

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