51单片机四个独立按键是短按还是长按

/********************************************/

//FileName:识别四个独立按键是短按还是长按

//Function: 不同按键 短按或长按分别显示不同的LED

//author:liu yong

//QQ:545018331

//Date:2013/03/13

/********************************************/

#include <PIC.H>

__CONFIG(0X3B31);

#define uint8 unsigned char

unsigned int time_10ms_ok=0;

uint8 KeyValue;

bit KeyShortpressFlag,KeyLongpressFlag;

//＝＝＝＝＝＝＝＝＝定义长按键断口的TICK数及连发间隔的TICK数＝＝＝＝＝＝＝//

#define KEY_LONG_PERIOD 200

//＝＝＝＝＝＝＝＝＝定义按键断口＝＝＝＝＝＝＝//

#define io_key_1 RB0

#define io_key_2 RB1

#define io_key_3 RB2

#define io_key_4 RB3

//＝＝＝＝＝＝＝＝＝定义按键键值＝＝＝＝＝＝＝//

#define KEY_VALUE_1 0X0e

#define KEY_VALUE_2 0X0d

#define KEY_VALUE_3 0X0b

#define KEY_VALUE_4 0X07

#define KEY_NULL 0X0f

//＝＝＝＝＝＝＝＝＝定义按键返回值状态（按下，长按，连发，释放）＝＝＝＝＝＝＝//

#define KEY_SHORT 0X80

#define KEY_LONG 0X40

//＝＝＝＝＝＝＝＝＝定义按键状态＝＝＝＝＝＝＝//

#define KEY_STATE_INIT 0

#define KEY_STATE_WOBBLE 1

#define KEY_STATE_PRESS 2

#define KEY_STATE_LONG 3

#define KEY_STATE_RELEASE 4

void initial(void)

{

TRISB=0xff;

TRISC=0;

PORTC=0XFF;

RBPU=0;

T1CON=0X01;//1:1

TMR1H=-(10000 >> 8);

TMR1L=-(10000 & 0XFF);

TMR1IF=0;

TMR1IE=1;

INTCON=0XC0;

}

void interrupt timer1_isr(void) // 定时器10ms中断服务

{

if(TMR1IF)

{

TMR1H=-(10000 >> 8);

TMR1L=-(10000 & 0XFF);

time_10ms_ok = 1;

TMR1IF=0;

}

}

void KeyInit(void)

{

io_key_1 = 1;

io_key_2 = 1;

io_key_3 = 1;

io_key_4 = 1;

}

uint8 KeyScan(void)

{

if(io_key_1 == 0)return KEY_VALUE_1;

if(io_key_2 == 0)return KEY_VALUE_2;

if(io_key_3 == 0)return KEY_VALUE_3;

if(io_key_4 == 0)return KEY_VALUE_4;

return KEY_NULL;

}

uint8 GetKey(void)

{

static uint8 s_u8KeyState = KEY_STATE_INIT ;

static uint8 s_u8KeyTimeCount = 0;

uint8 i ;

uint8 KeyTemp=KEY_NULL;

KeyTemp = KeyScan();//0x0e 0f

switch(s_u8KeyState)

{

case KEY_STATE_INIT:

{

if(KEY_NULL != KeyTemp)

{

s_u8KeyState = KEY_STATE_WOBBLE ;

}

}

break;

case KEY_STATE_WOBBLE:

{