状态机按键

2万 · 2017-11-27 22:47

大家有没有状态机按键的参考程序？

2万 · 2017-11-27 22:49

这个很多吧

2万 · 2017-11-27 22:51

以前按键都是用延时程序来判断的

2万 · 2017-11-27 22:58

这样CPU的效率不高。

2万 · 2017-11-27 22:59

是啊

2万 · 2017-11-27 23:00

源码区找找吧，肯定有

2万 · 2017-11-27 23:01

状态机按键是老生常谈的问题了，论坛中有很多资料的，楼主再找找看呗。。。

1万 · 2017-11-27 23:02

#include "KeyBoard.h"
#include "AS1.h"

//unsigned int msCount;
#define KeyBuffLen 8
struct Struct_KeyBoardBuff
{
  uchar buff[KeyBuffLen];
  uchar in;
  uchar out;
}Key;
enum KeyFSM_Enum
{
  _Key_Idle=0,
  _Key1_down,
  _Key1_press,
  _Key1_up,
  _Key2_down,
  _Key2_press,
  _Key2_up,
  _Key_confirm,
};

void KeyBoardInit(void)
{
Key.in=0;
Key.out=0;
}
uchar ReadKey(void)
{
  uchar Value;
  if (Key.out!=Key.in)
  {
Value=Key.buff[Key.out++];
if (Key.out>=KeyBuffLen)
{
   Key.out=0;
}
  }
  else
  {
Value=KeyNull;
  }
  return(Value);
}
uchar JudgeKey(uchar key)
{
  uchar i,count=0;
  for (i=0;i<6 ;i++ )
  {
if ((key&0x01)==0)count++;
key=key>>1;
  }
  return(count);
}
void KeyIn(void)
{
  static uchar Key_Input=0;
  static uchar volatile step=0;
  //Put the code get the Key_Value
  uchar NewKey=KEY_PORT&0x3f;
  //---------------------------
  uchar num=JudgeKey(NewKey);
  switch(step)
  {
case _Key_Idle:
{
   switch (num)
   {
      case 1:
      {
      Key_Input=NewKey;
      step=_Key1_down;
      break;
      }
      case 2:
      {
      Key_Input=NewKey;
      step=_Key2_down;
      break;
      }
      default:
      {
      break;
      }
   }
   break;
}
case _Key1_down:
{
   switch (num)
   {
      case 1:
      {
      if(NewKey==Key_Input)
         step=_Key1_press;
      else
         step=_Key_Idle;
      break;
      }
      case 2:
      {
      Key_Input=NewKey;
      step=_Key2_down;
      break;
      }
      default:
      {
      step=_Key_Idle;
      break;
      }
   }
   break;
}
case _Key1_press:
{
   switch (num)
   {
      case 1:
      {
      if(NewKey!=Key_Input)
         step=_Key1_up;
      break;
      }
      case 2:
      {
      Key_Input=NewKey;
      step=_Key2_down;
      break;
      }
      default:
      {
      step=_Key1_up;
      break;
      }
   }
   break;
}
case _Key1_up:
{
   switch (num)
   {
      case 1:
      {
      if(NewKey==Key_Input)
         step=_Key1_press;
      else
         step=_Key_confirm;
      break;
      }
      case 2:
      {
      Key_Input=NewKey;
      step=_Key2_down;
      break;
      }
      default:
      {
      step=_Key_confirm;
      break;
      }
   }
   break;
}
case _Key2_down:
{
   if(NewKey==Key_Input)
      step=_Key2_press;
   else
      step=_Key_Idle;
   break;
}
case _Key2_press:
{
   if (num==0)
      step=_Key2_up;
   break;
}
case _Key2_up:
{
   if (num==0)
      step=_Key_confirm;
   break;
}
default:
{
   step=_Key_Idle;
   break;
}
  }
  if (step==_Key_confirm)
  {
step=_Key_Idle;
if (Key_Input!=0)
{
   Key.buff[Key.in++]=Key_Input;
   if (Key.in>=KeyBuffLen)
   {
      Key.in=0;
   }
}
  }
}

void Key_Board_Test(void)
{
  uchar key;
  key=ReadKey();
switch (key)
{
   case KeyUp:
   {
      AS1_SendString("Up.");
      break;
   }
   case KeyDown:
   {
      AS1_SendString("Down.");
      break;
   }
   case KeyAdd:
   {
      AS1_SendString("Add.");
      break;
   }
   case KeySub:
   {
      AS1_SendString("Sub.");
      break;
   }
   case KeyEnter:
   {
      AS1_SendString("Enter.");
      break;
   }
   case KeyReturn:
   {
      AS1_SendString("Return.");
      break;
   }
   case KeyLr:
   {
      AS1_SendString("LR.");
      break;
   }
   default:
   {
      //AS1_SendString("None.");
      break;
   }
}
}

文件Keyboard.h

#ifndef _Key_Board_h_
#define _Key_Board_h_

#define KEY_PORT PORTA

#define KeyUp 0x3e
#define KeyDown 0x3d
#define KeyAdd 0x3b
#define KeySub 0x37
#define KeyEnter 0x2f
#define KeyReturn 0x1f
#define KeyLr 0x33
#define KeyNull 0xff
typedef unsigned char uchar;
extern unsigned int msCount;

extern void KeyBoardInit(void);
extern unsigned char ReadKey(void);
extern void KeyIn(void);
extern void Key_Board_Test(void);

#endif

2万 · 2017-11-27 23:03

结贴了，多谢大家讨论这么多哈，呵呵

2万 · 2017-11-27 23:04

其实还是不大明白，我再琢磨琢磨吧，多谢了哈，结贴了先

只看该作者 · 2017-11-28 16:36

上面的程序是很经典的，非常不错的