单片机按键程序，够完美吗？

写过一段时间单片机程序，也看了一些单片机程序，书上的，网上的，基本都是非常原始的读取按键，延时判断，这些按键相关代码穿插于整个程序，着实不够美观，最重要的是不能复用，so俺就想做个按键框架，只需提供按键处理代码即可，言归正传，先简介一下几个文件，ringfifo.c提供了一个简单的环形缓冲队列，用以通知按键消息，key.c 实现的按键的框架处理(读取按键,调用按键处理函数），key_port.c 需提供底层硬件接口及用户的按键处理函数，目前支持的按键消息类型有4类：keyDown,keyRelease,longPress, double click.

key.h中提供了4个函数:InitKey()为初始化,KeyProc() 须在主循环中调用,KeyScan()须定时(10-20ms)调用，SetKeyHandler()用来设置按键处理函数

key.h

1 #ifndef __KEY_H__

2 #define __KEY_H__

3

4 #define NULL 0

5

6 typedef enum{

7 KEY_EVENT_DOWN = 0,

8 KEY_EVENT_UP,

9 KEY_EVENT_LONGPRESS,

10 KEY_EVENT_DOUBLECLICK,

11 KEY_EVENT_COMBO_KEYDOWN,

12 }KeyEventType;

13

14 typedef void (*pKeyEventCB)(void *para);

15

16 typedef struct _tagKeyInfo

17 {

18 unsigned char keyCode;

19 unsigned char keyStatus;

20 unsigned char comboKeyFlag;

21 unsigned int keyDbClickTime;

22 unsigned int keyDownTime;

23 unsigned int keyRepeatTime;

24 pKeyEventCB FuncCB[5];

25 void * para[5];

26 }KeyInfo;

27

28 typedef struct _tagMessageInfo

29 {

30 unsigned int keyEvent;

31 unsigned int keyCode;

32 KeyInfo* pContext;

33 }MessageInfo;

34

35

36

37 void InitKey(void); //

38

39 void KeyProc(void);// call this func in main loop

40

41 void KeyScan(void); // call it in timer service, 20ms

42

43 pKeyEventCB SetKeyHandler(unsigned char key,KeyEventType event,pKeyEventCB pFunc,void *para);

44

45 #endif

key.c

1#include"key_port.h"2#include"key.h"3#include"ringfifo.h"4#include56#defineKEY_STATE_UP0X07#defineKEY_STATE_DOWN0X38#defineKEY_STATE_LONGRESS0XF9#defineKEY_STATE_RELEASE0XC1011staticKeyInfokInfo[KEY_AMOUNT];12staticRingFifoMsgQ;131415voidPostMessage(MessageInfo*pMsg)16{17PushFifo(&MsgQ,pMsg);18}1920unsignedcharGetMessage(MessageInfo*pMsg)21{22returnPopFifo(&MsgQ,pMsg);23}2425//callitintimerservice26voidKeyScan(void)27{28inti=0;29unsignedcharc=0;30KeyInfo*pInfo=kInfo;31MessageInfoMsg;32for(i=0;i