www.pudn.com > Bit1611_demo_code.rar > KEY.H

/* ********************************************************************** 
 
         Copyright (c) 2002-2006 Beyond Innovation Technology Co., Ltd 
 
        All rights are reserved. Reproduction in whole or in parts is 
    prohibited without the prior written consent of the copyright owner. 
   ---------------------------------------------------------------------- 
 
    Module: KEY.H 
 
    Purpose: Interface of KEY module. 
 
    Version: 0.01                                   07:20PM  2005/05/13 
 
    Compiler: Keil 8051 C Compiler v8.01 
 
    Reference: 
 
   ---------------------------------------------------------------------- 
    Modification: 
 
    R0.01 07:20PM  2005/05/13 Jeffrey Chang 
    Reason: 
        1. Original. 
    Solution: 
 
   ********************************************************************** */ 
 
#ifndef _KEY_H_ 
#define _KEY_H_ 
 
/* ------------------------------------ 
    Header Files 
   ------------------------------------ */ 
#include "common.h" 
#include "platform.h" 
 
 
/* ------------------------------------ 
    Macro Definitions 
   ------------------------------------ */ 
#undef EXTERN 
 
#ifdef _KEY_C_ 
    #define EXTERN 
#else 
    #define EXTERN  extern 
#endif 
 
 
 
 
 
 
/* .................................... 
    KEY Configuration 
   .................................... */ 
#define KEY_AUTO_REPEAT         ON 
#define KEY_RELEASE_DETECTION   ON 
#define KEY_STILL_DETECTION     ON 
 
 
// Keypad Port 
#define KEY_IOPORT              P2 
 
// Keypad Attribute 
#define KEY_MASK                0xF8            // 5 keys 
#define KEY_MASK_IR             0x03 
#define KEY_MASK_STILL          0x02            // Key Still Pressed ! 
#define KEY_MASK_RELEASE        0x01            // Key Released ! 
 
/* KEY CODE by Keypad */ 
#define KEY_NULL                0x00 
 
#define KEY_POWER               0x80            // P2.7 Power   Active Low 
#define KEY_MENU                0x40            // P2.6 Menu    Active Low 
#define KEY_SELECT              0x20            // P2.5 Select  Active Low 
#define KEY_UP                  0x10            // P2.4 Up      Active Low 
#define KEY_DOWN                0x08            // P2.3 Down    Active Low 
 
 
// Combined KEY CODE by Keypad ! 
#define KEY_UP_DOWN             (KEY_UP | KEY_DOWN) 
 
// Still KEY CODE by Keypad ! 
#define KEY_STILL_POWER         (KEY_MASK_STILL     | KEY_POWER) 
#define KEY_STILL_MENU          (KEY_MASK_STILL     | KEY_MENU) 
#define KEY_STILL_SELECT        (KEY_MASK_STILL     | KEY_SELECT) 
 
#define KEY_RELEASE_POWER       (KEY_MASK_RELEASE   | KEY_POWER) 
#define KEY_RELEASE_MENU        (KEY_MASK_RELEASE   | KEY_MENU) 
#define KEY_RELEASE_SELECT      (KEY_MASK_RELEASE   | KEY_SELECT) 
 
// KEY CODE by IR 
#define KEY_IR_POWER            (KEY_MASK_IR        | KEY_POWER) 
#define KEY_IR_MENU             (KEY_MASK_IR        | KEY_MENU) 
#define KEY_IR_SELECT           (KEY_MASK_IR        | KEY_SELECT) 
#define KEY_IR_UP               (KEY_MASK_IR        | KEY_UP) 
#define KEY_IR_DOWN             (KEY_MASK_IR        | KEY_DOWN) 
 
 
/* Size of the KEYPAD buffer */ 
#define KEY_BFR_SIZE            4 
 
/* Number of system ticks for key delay to start repeat, normally 1 second */ 
#define KEY_REPEAT_START_DELAY  16      // 16 Key Scan Periods = 16 x 48 ms 
 
/* Number of system ticks between each key repeat interval */ 
/* Key rate is 20 keys per second */ 
#define KEY_REPEAT_INTERVAL     1       // 1 Key Scan Periods = 1 x 48 ms 
 
#define KEY_STILL_INTERVAL      36      // 36 Key Scan Periods = 36 x 48 ms 
 
 
 
#define KEY_VR_DEFAULT              100 
 
 
/* ------------------------------------ 
    Type Definitions 
   ------------------------------------ */ 
 
 
/* ------------------------------------ 
    Variables Definitions/Declarations 
   ------------------------------------ */ 
sbit KEY_iPOWER         = P2 ^ 7;           // Active LOW 
sbit KEY_iMENU          = P2 ^ 6;           // Active Low 
sbit KEY_iSELECT        = P2 ^ 5;           // Active Low 
sbit KEY_iUP            = P2 ^ 4;           // Active Low 
sbit KEY_iDOWN          = P2 ^ 3;           // Active Low 
 
 
 
EXTERN UB8  bKeyCnt;             /* Number of keys read from the keypad */ 
EXTERN BOOL fKeyReleased; 
EXTERN UB8  bKeyScanState;       /* Current state of key scanning function */ 
 
#if (KEY_AUTO_REPEAT) 
EXTERN UB8  bTimerKeyAuto; 
#endif 
 
EXTERN UB8  bTimerKeyPressed; 
EXTERN UB8  bLastKey; 
 
#if (KEY_STILL_DETECTION) 
EXTERN UB8  bKEY_STILL_INTERVAL;        // Addedd by JC 09:37AM  2004/11/26 
#endif 
 
#if (KEY_VR_AIN21) 
EXTERN UB8  bKEY_VR_ADJUSTMENT; 
#endif 
 
 
/* ------------------------------------ 
    Function Prototypes 
   ------------------------------------ */ 
EXTERN void KEY_BufferFlush(void);      /* Flush the keypad buffer */ 
EXTERN void KEY_BufferIn(UB8 bCode);    /* Put a Keycode in the buffer  */ 
EXTERN UB8  KEY_BufferOut(void);        /* Get a scan code from buffer  */ 
EXTERN UB8  KEY_Decode(void); 
EXTERN BOOL KEY_Hit(void);              /* Check whether any key was pressed */ 
EXTERN void KEY_Init(void);             /* Initialize the keypad module */ 
EXTERN BOOL KEY_Pressed(void); 
EXTERN void KEY_Scan(void);             /* Background process for key scan */ 
 
 
#endif /* _KEY_H_ */ 
 
 
/* ********************************************************************** 
 
    Description: 
 
   ********************************************************************** */ 
 
/* %% End Of File %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% */