menu._c

一个用于LCD的菜单模式界面的程序,如何实现滚屏.

#define Null 0


/*********************** 
* 函数声明 * 
***********************/ 
void ShowMenu(void);
void Menu_Change(unsigned char KeyNum);

/*********************** 
* 按键功能键宏定义 * 
***********************/ 
#define UP		   	'3'
#define Down		'7'
#define Esc			'B'
#define Enter		'F'
#define Reset		'0'


/********************** 
* 目录结构体定义 * 
**********************/ 
struct MenuItem
{ 
unsigned char MenuCount; 		//当前层节点数
unsigned char *DisplayString; 	//菜单标题
void (*Subs)(); 			  	//节点函数
struct MenuItem *ChildrenMenus; //子节点
struct MenuItem *ParentMenus; 	//父节点
}; 

/*********************** 
* 调用子函数区 * 
***********************/ 
void NullSubs(void) 
{ 
}
//----------------------以下为例子,请根据实际情况修改---------------------------

void TimeSet(void)
{
// put_s("TimeSet");
}

void DateSet(void)
{
//put_s("DateSet");
}

void AlertSet (void)
{
//put_s("AlertSet");
}
//------------------------------------------------------------------------------






/*********************** 
* 结构体区 * 
***********************/ 
//----------------------以下为例子,请根据实际情况修改---------------------------
struct MenuItem TimeMenu[4];
struct MenuItem FlashMenu[5];
struct MenuItem VoiceMenu[5];
struct MenuItem RobotMenu[5];
struct MenuItem MainMenu[5];

struct MenuItem TimeMenu[4]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {4, 			 "1.Time Set",			 TimeSet,			Null,				MainMenu},
	 {4,			 "2.Date Set",		 	 DateSet,			Null,				MainMenu},
	 {4,			 "3.AlertSet",		 	 AlertSet,			Null,				MainMenu},
	 {4,  			 "4.Back",		 		 NullSubs,			MainMenu,			MainMenu},
};	

struct MenuItem FlashMenu[5]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {5, 			 "1.Flash Record",		 NullSubs,			Null,				MainMenu},
	 {5,			 "2.Play",		 	 	 NullSubs,			Null,				MainMenu},
	 {5,			 "3.Pause",		 	 	 NullSubs,			Null,				MainMenu},
	 {5,  			 "4.Flash Delete",		 NullSubs,			Null,				MainMenu},
	 {5,			 "5.Back",				 NullSubs,			MainMenu,			MainMenu},
};	 

struct MenuItem VoiceMenu[5]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {5, 			 "1.Voice Record"	,	 NullSubs,			Null,				MainMenu},
	 {5,			 "2.Play",		 	 	 NullSubs,			Null,				MainMenu},
	 {5,			 "3.Pause",		 	     NullSubs,			Null,				MainMenu},
	 {5,  			 "4.Voice Delete",		 NullSubs,			Null,				MainMenu},
 	 {5,			 "5.Back",				 NullSubs,			MainMenu,			MainMenu},
};	 

struct MenuItem RobotMenu[5]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {5, 			 "1.Turn Left",		 	 NullSubs,			Null,				MainMenu},
	 {5,			 "2.Turn Right",		 NullSubs,			Null,				MainMenu},
	 {5,			 "3.Go Ahead",		 	 NullSubs,			Null,				MainMenu},
	 {5,  			 "4.Go Back",		 	 NullSubs,			Null,				MainMenu},
	 {5,			 "5.Back",				 NullSubs,			MainMenu,			MainMenu},
};	 


struct MenuItem MainMenu[5]=
{  //MenuCount		 DisplayString			 Subs				ChildrenMenus		ParentMenus
	 {5, 			 "1.Time Set"	,		 NullSubs,			TimeMenu,			Null},
	 {5,			 "2.Voice Center",		 NullSubs,			VoiceMenu,			Null},
	 {5,			 "3.Robot Control",		 NullSubs,			RobotMenu,			Null},
	 {5,  			 "4.Flash Option",		 NullSubs,			FlashMenu,			Null},
 	 {5,			 "5.Back",				 NullSubs,			MainMenu,			MainMenu},
};	
//------------------------------------------------------------------------------






/*********************** 
* 全局变量声明区 * 
***********************/ 
struct MenuItem (*MenuPoint) = MainMenu; //结构体指针,指向结构体后由内部函数指针指向功能函数
unsigned char DisplayStart = 0; //显示时的第一个菜单项
unsigned char UserChoose = 0;  	//用户所选菜单项
unsigned char DisplayPoint = 0; //显示指针
unsigned MaxItems; 		   	 	//同级最大菜单数
unsigned char ShowCount=2;		//同屏显示菜单数


/*********************** 
*显示函数区 * 
***********************/ 
void ShowMenu(void) 
{
 	 unsigned char n;
	 MaxItems = MenuPoint[0].MenuCount;//定义最大同级菜单
	 DisplayPoint = DisplayStart;
	 for(n=0;DisplayPoint<MaxItems&&n<ShowCount;n++) 
	 	{if(DisplayPoint==UserChoose)
		 		LCD_write_string(0,n,"->");
		 LCD_write_string(2,n,MenuPoint[DisplayPoint++].DisplayString);
		 
	 	}

}

void Menu_Change(unsigned char KeyNum)
{
		if(KeyNum)
		{
		   switch(KeyNum) 
		   {		    
		   				case UP: 
							 UserChoose --; 
							 if (UserChoose ==255)
							 { 
							   	UserChoose = 0;//上翻截至,如果要回滚赋值MaxItems-1
							 } 
							 break; 
						case Esc: 
							 if (MenuPoint[UserChoose].ParentMenus != Null) 
							 { 
							   	MenuPoint = MenuPoint[UserChoose].ParentMenus; 
								UserChoose = 0; 
								DisplayStart = 0; 
							} 
							break; 
						case Down: 
							 UserChoose ++; 
							 if (UserChoose == MaxItems) 
							 { 
							   UserChoose = MaxItems-1;//下翻截至,如要回滚赋值为0 
							 } 
							 break; 
						case Enter: 
							 if (MenuPoint[UserChoose].Subs != NullSubs) 
							 { 
							   (*MenuPoint[UserChoose].Subs)(); 
							 } 
							 else if (MenuPoint[UserChoose].ChildrenMenus != Null) 
							 { 
							   MenuPoint = MenuPoint[UserChoose].ChildrenMenus; 
							   UserChoose = 0; 
							   DisplayStart = 0; 
							 } 
							 break; 
					   case Reset: 
					   		MenuPoint = MainMenu; 
							UserChoose = 0; 
							DisplayStart = 0; 
							break; 
					   default:break;
			}
			if (UserChoose%ShowCount==0)           //一屏只能显示ShowCount行
			  DisplayStart = UserChoose;
			else if(UserChoose==1||UserChoose== 3)
			   DisplayStart = UserChoose-1;		   //实现滚屏的关键				 
			LCD_write_command(0x01);			   //液晶清屏,根据不同液晶函数自行修改
			delay_nms(5);						   //液晶为慢速器件
			ShowMenu(); 
		}
}