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我在网上看到51单片机似乎不建议使用malloc函数,但这段程序也是看了论坛一位大佬写的多级菜单的程序,不知道怎么改
求教怎么才能正确初始化菜单 使用的是stc89c52rc
- #include <reg52.h>
- #include <string.h>
- #include <stdio.h>
- #include <stdlib.h>
- /********IO引脚定义***********************************************************/
- sbit LCD_RS=P1^0;
- sbit LCD_RW=P1^1;
- sbit LCD_E=P1^2;
- sbit PSB =P1^6; //PSB脚为12864-12系列的串、并通讯功能切换,我们使用8位并行接口,PSB=1
- sbit KEY1=P3^7;
- sbit KEY2=P3^6;
- sbit KEY3=P3^5;
- sbit KEY4=P3^4;
- sbit KEY5=P3^3;
- sbit KEY6=P3^2; //定义按键1~7
- /********宏定义***********************************************************/
- #define LCD_Data P0
- #define Busy 0x80 //用于检测LCD状态字中的Busy标识
- /********函数声明*************************************************************/
- void WriteDataLCD(unsigned char WDLCD);
- void WriteCommandLCD(unsigned char WCLCD,BuysC);
- unsigned char ReadDataLCD(void);
- unsigned char ReadStatusLCD(void);
- void LCDInit(void);
- void LCDClear(void);
- void LCDFlash(void);
- void Delay5Ms(void);
- void Delay400Ms(void);
- void highlight(unsigned char x,unsigned char y,unsigned char width,unsigned char mode);
- unsigned char key_scan(void);
- void display(unsigned char line);
- void func(void);
- void LCDClear(void);
- void LCD_0(void);
- void LCD_Set_XY(unsigned char x,unsigned char y);
- void Lcd_Disp(unsigned char x,unsigned char y,unsigned char *s);
- //首先定义一个菜单结构体
- typedef struct menu //定义一个菜单
- {
- unsigned char range_from,range_to; //当前显示的项开始及结束序号
- unsigned char itemCount; //项目总数
- unsigned char selected; //当前选择项
- unsigned char *menuItems[17]; //菜单项目
- struct menu **subMenus; //子菜单
- struct menu *parent; //上级菜单 ,如果是顶级则为null
- void (**func)(); //选择相应项按确定键后执行的函数
- }Menu;
- Menu MainMenu = { //定义主菜单
- 0,3,4,0, //默认显示0-3项,总共4项,当前选择第0项
- {
- "测量表 ", // >表示有下级选项
- "其他设置 ",
- "保护设定 ",
- "查询 >"
- }
- };
- Menu searchMenu = { //查询菜单
- 0,3,6,0,
- {
- "记帐记录明细 ",
- "未采集记录数 ",
- "设备机号 ",
- "本机IP地址 ",
- "记录空间大小 ",
- "软件版本 "
- }
- };
- Menu *currentMenu; //当前的菜单
- //初始化菜单:
- void initMenu()
- {
- char mempool[512];
- init_mempool (&mempool, sizeof(mempool));
- MainMenu.subMenus = malloc(sizeof(&MainMenu)*4);
- MainMenu.subMenus[0] = &searchMenu;//第1到3项没有子菜单置null,选择后程序会调用func中相应项中的函数
- MainMenu.subMenus[1] = NULL;
- MainMenu.subMenus[2] = NULL;
- MainMenu.subMenus[3] = NULL;//第四项查询有子菜单
-
- MainMenu.func = malloc(sizeof(&func)*4);
- MainMenu.func[0] = NULL;
- MainMenu.func[1] = NULL;
- MainMenu.func[2] = &func;//当选择了并按了确定,会执行func函数
- MainMenu.func[3] = NULL;
- MainMenu.parent = NULL;//表示是顶级菜单
-
- searchMenu.subMenus = malloc(sizeof(&searchMenu)*6);
- searchMenu.subMenus[0] = searchMenu.subMenus[1] = searchMenu.subMenus[2] = searchMenu.subMenus[3] = searchMenu.subMenus[4] = searchMenu.subMenus[5] = NULL;
- searchMenu.func = malloc(sizeof(&printf)*6);
- searchMenu.func[0] = searchMenu.func[1] = searchMenu.func[2] = searchMenu.func[3] = searchMenu.func[4] = searchMenu.func[5] = NULL;
- searchMenu.parent = &MainMenu;//上一级菜单是MainMenu.进入查询子菜单后按返回键,将会显示这个菜单项
-
- currentMenu = &MainMenu;
-
- }
- //main
- int main(void)
- {
- Delay400Ms(); //启动等待,等LCD讲入工作状态
- LCDInit(); //LCD初始化
- Delay5Ms(); //延时片刻
- initMenu();
- display(currentMenu->selected);
- while(1){
- unsigned char key = key_scan();
- if(key == 0)
- {
- Delay5Ms();
- Delay5Ms();
- continue;
- }
- switch(key)
- {
- case 3://向上
- if(currentMenu->selected == 0)//到了第一项
- break;
- else
- {
- currentMenu->selected--;
- if(currentMenu->selected < currentMenu->range_from)//更新显示的区域
- {
- currentMenu->range_from = currentMenu->selected;
- currentMenu->range_to = currentMenu->range_from+3;
- }
- display(currentMenu->selected);
- break;
- }
- case 4://向下
- if(currentMenu->selected == currentMenu->itemCount-1)
- break;
- else
- {
- currentMenu->selected++;
- if(currentMenu->selected>currentMenu->range_to)
- {
- currentMenu->range_to = currentMenu->selected;
- currentMenu->range_from = currentMenu->range_to-3;
- }
- display(currentMenu->selected);
- break;
- }
- case 1://Enter键
- {
- if(currentMenu->subMenus[currentMenu->selected] !=NULL)
- {
- currentMenu=currentMenu->subMenus[currentMenu->selected];
- display(0);
- }
- else
- {
- if(currentMenu->func[currentMenu->selected] != NULL)
- {
- currentMenu->func[currentMenu->selected]();//执行相应的函数
-
- display(currentMenu->selected);//返回后恢复原来的菜单状态
- }
- }
- break;
- }
- case 6://返回键
- {
- if(currentMenu->parent!=NULL)//父菜单不为空,将显示父菜单
- {
- currentMenu = currentMenu->parent;
- display(currentMenu->selected);
- }
- break;
- }
- default:
- break;
- }
- Delay5Ms();
- Delay5Ms();
- }
- }
-
- /*************************反白显示*************************************/
- void highlight(unsigned char x,unsigned char y,unsigned char width,unsigned char mode) //反白,X值为0-7,Y值为0-3,width为行反白格数
- {
- unsigned char i,j,flag=0x00;
- if(y>1)
- {
- flag=0x08;
- y=y-2;
- }
- WriteCommandLCD(0x34,1); //写数据时,关闭图形显示,且打开扩展指令集
- for(i=0;i<16;i++)
- {
- WriteCommandLCD(0x80+(y<<4)+i,1);
- WriteCommandLCD(0x80+flag+x,1);
- for(j=0;j<width;j++)
- {
- WriteDataLCD(mode);
- WriteDataLCD(mode);
- }
- }
- WriteCommandLCD(0x36,1); //写完数据,开图形显示
- }
- /***********写数据********************************************************/
- void WriteDataLCD(unsigned char WDLCD)
- {
- ReadStatusLCD(); //检测忙
- LCD_RS = 1;
- LCD_RW = 0;
- LCD_Data = WDLCD;
- LCD_E = 1;
- LCD_E = 1;
- LCD_E = 0;
- }
- /***********写指令********************************************************/
- void WriteCommandLCD(unsigned char WCLCD,BuysC) //BuysC为0时忽略忙检测
- {
- if (BuysC) ReadStatusLCD(); //根据需要检测忙
- LCD_RS = 0;
- LCD_RW = 0;
- LCD_Data = WCLCD;
- LCD_E = 1;
- LCD_E = 1;
- LCD_E = 0;
- }
- /***********读状态*******************************************************/
- unsigned char ReadStatusLCD(void)
- {
- LCD_Data = 0xFF;
- LCD_RS = 0;
- LCD_RW = 1;
- LCD_E = 1;
- LCD_E = 1;
- while (LCD_Data & Busy); //检测忙信号
- LCD_E = 0;
- return(1);
- }
- /***********初始化********************************************************/
- void LCDInit(void)
- {
- WriteCommandLCD(0x30,1); //显示模式设置,开始要求每次检测忙信号
- WriteCommandLCD(0x01,1); //显示清屏
- WriteCommandLCD(0x06,1); // 显示光标移动设置
- WriteCommandLCD(0x0C,1); // 显示开及光标设置
- }
- /***********短延时********************************************************/
- void Delay5Ms(void)
- {
- unsigned int TempCyc = 11104;
- while(TempCyc--);
- }
- /***********长延时********************************************************/
- void Delay400Ms(void)
- {
- unsigned char TempCycA = 5;
- unsigned int TempCycB;
- while(TempCycA--){
- TempCycB=7269;
- while(TempCycB--);
- }
- }
- void LCD_0 (void){
- unsigned char x,y,i;
- unsigned int tmp=0;
- for(i=0;i<9;){ //分两屏,上半屏和下半屏,因为起始地址不同,需要分开
- for(x=0;x<32;x++){ //32行
- WriteCommandLCD(0x34,1);
- WriteCommandLCD((0x80+x),1); //列地址
- WriteCommandLCD((0x80+i),1); //行地址,下半屏,即第三行地址0X88
- WriteCommandLCD(0x30,1);
- for(y=0;y<16;y++)
- WriteDataLCD(0x00);//读取数据写入LCD
- tmp+=16;
- }
- i+=8;
- }
- WriteCommandLCD(0x36,1); //扩充功能设定
- WriteCommandLCD(0x30,1);
- }
- //扫描键盘并返回按键值
- unsigned char key_scan()
- {
- unsigned char sta = 1;//设置一个状态,表示按键是否按下,1为抬起
- if(sta == 1&&(KEY1 == 0||KEY2 == 0||KEY3 ==0||KEY4 ==0||KEY5 ==0||KEY6 ==0))//如果有一个按键按下,则进入下面程序,注意此时使用的逻辑或的关系
- {
- Delay5Ms();//消抖5ms
- sta = 0;//设置一个状态,表示按键是否按下,0为按下
-
- if(KEY1== 0) return 1;
- else if(KEY2 ==0) return 2;
- else if(KEY3 ==0) return 3;
- else if(KEY4 ==0) return 4;
- else if(KEY5 ==0) return 5;
- else if(KEY6 ==0) return 6;
- }
- else if (KEY1 == 1&&KEY2 == 1&&KEY3 ==1&&KEY4 ==1&&KEY5 ==1&&KEY6 ==1) sta = 1;//表示没有按键按下,注意此时使用的是逻辑与的关系;
- return 0;//没有按键按下
- }
- //用于显示菜单项
- void display(unsigned char line) //显示菜单项并设置选中的项反白
- {
- int i;
- line = 3-(currentMenu->range_to-line);
- LCD_0();
- for(i = 0;i<4;i++)
- {
- Lcd_Disp(i+1,0,currentMenu->menuItems[i+currentMenu->range_from]);
- }
- highlight(0,line,8,255);//反白显示指定行
- }
- void func(void)
- {
- }
- void LCD_set_xy( unsigned char x, unsigned char y )
- { //设置LCD显示的起始位置,X为行,Y为列
- unsigned char address;
- switch(x)
- {
- case 0: address = 0x80 + y; break;
- case 1: address = 0x80 + y; break;
- case 2: address = 0x90 + y; break;
- case 3: address = 0x88 + y; break;
- case 4: address = 0x98 + y; break;
- default:address = 0x80 + y; break;
- }
- WriteCommandLCD(address, 1);
- }
- void Lcd_Disp(unsigned char x,unsigned char y,unsigned char *s)
- {
- WriteCommandLCD(0x30,1); //进入标准模式
- LCD_Set_XY(x,y);
- while (*s)
- {
- WriteDataLCD(*s);
- s++;
- }
- WriteCommandLCD(0x36,1); //返回图形模式
- }
复制代码
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