按键的单击与双击与长按短按实现方式相近，以下代码仅供参考，写得不是很好

适用于蓝桥杯开发板

程序扩展性不强，更重要的是思路

io.h

#ifndef _IO_H

#define _IO_H

#include "stm32f10x.h"

#define SingleClick 1

#define DoubleClick 2

#define KEY_B1 1

#define KEY_B2 2

#define KEY_B3 3

#define KEY_B4 4

#define TimeInterval 300 //判断双击与单击时间

#define keyState1 1

#define keyState2 2

#define keyState3 3

#define keyState4 4

//enum ss{keyState1,keyState2,keyState3,keyState4}keyState;

#define KEY0 GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_0)

#define KEY1 GPIO_ReadInputDataBit(GPIOA,GPIO_Pin_8)

#define KEY2 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_1)

#define KEY3 GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_2)

enum k{key0,key1,key2,key3};

extern void Delay_Ms(u32 nTime);

void RCC_Init(void);

void IO_Init(void);

void LED_Control(u16 nled , u8 flag);

u8 KEY_Scan(void);

void Key_Double(void);

#endif

io.c

u8 KEY_Scan(void)//按键扫描函数，查找键值

{

static u8 flag = 1;

if(flag&&(KEY0==0||KEY1==0||KEY2==0||KEY3==0))

{

Delay_Ms(10);

flag = 0;

if(KEY0==0)return key0;

else if(KEY1==0)return key1;

else if(KEY2==0)return key2;

else if(KEY3==0)return key3;

}

else if(KEY0==1&&KEY1==1&&KEY2==1&&KEY3==1)flag = 1;

return 0xff;

}

//单击双击

/*

1、两次间隔10ms - 300ms以内是双击, 按下第一次开始计时

2、300ms 之后没有按下第二次就是单击

3、思路与我按键单击双击的思维在方向上不太一样，这里是直接状态中判断按键

*/

void Key_Double(void)

{

static u8 key_value = 0xff;

// static u16 keynum1 = 0,keynum2 = 0;

static u8 key = 0; //记录第一次按键是谁按下

switch(keyState)//keyState见宏定义，是按键第一次按下

{

case keyState1: key_value = KEY_Scan();

if(key_value != 0xff){

// keynum1 = keyTime;

flag_1 = 1;

keyState = keyState2;

if(key_value==key0)key = 1;

else if(key_value==key1)key = 2;

else if(key_value==key2)key = 3;

else if(key_value==key3)key = 4;

}

else

{

flag_1 = 0;

keyState = keyState1;

}

break;

case keyState2: key_value = KEY_Scan();

if(keyTime<300)

{

switch(key)

{

case 1:if(key_value==key0){

keyDouble = KEY_B1;flag_1 = 0;

keyTime = 0;

keyState = keyState1;

} break;

case 2:if(key_value==key1){

keyDouble = KEY_B2;flag_1 = 0;

keyTime = 0;

keyState = keyState1;

} break;

case 3:if(key_value==key2){

keyDouble = KEY_B3;flag_1 = 0;

keyTime = 0;

keyState = keyState1;

}

break;

case 4:if(key_value==key3){

keyDouble = KEY_B4;flag_1 = 0;

keyTime = 0;

keyState = keyState1;

}

break;

}

}

else

{

switch(key)

{

case 1:keySingle = KEY_B1; break;

case 2:keySingle = KEY_B2; break;

case 3:keySingle = KEY_B3; break;

case 4:keySingle = KEY_B4; break;

}

flag_1 = 0;

keyTime = 0;

keyState = keyState1;

key = 0;

}

break;

case keyState3:

break;

case keyState4:

break;

default: break;

}

}