運行效果圖:
選擇查詢項：
選擇查詢項并按確定鍵后：
此時按返回鍵，將會返回到第二個圖片中的界面
首先定義一個菜單結構
- typedef struct menu//定義一個菜單
- {
- u8 range_from,range_to; //當前顯示的項開始及結束序號
- u8 itemCount;//項目總數
- u8 selected;//當前選擇項
- u8 *menuItems[17];//菜單項目
- struct menu **subMenus;//子菜單
- struct menu *parent;//上級菜單 ,如果是頂級則為null
- void (**func)();//選擇相應項按確定鍵后執行的函數
- }Menu;
- Menu MainMenu = { //定義主菜單
- 0,3,4,0,//默認顯示0-3項，總共4項，當前選擇第0項
- {
- "設置1 ",
- "設置2 ",
- "輸入指令發送 ",
- "查詢 "
- }
- };
- Menu searchMenu = {//查詢菜單
- 0,3,6,0,
- {
- "記帳記錄明細 ",
- "未采集記錄數 ",
- "設備機號 ",
- "本機IP地址 ",
- "記錄空間大小 ",
- "軟件版本 "
- }
- };
- Menu *currentMenu;//當前的菜單
- 用于顯示菜單項
- void display(u8 line) //顯示菜單項并設置選中的項反白
- {
- int i;
- line = 3-(currentMenu->range_to-line);
- Lcd_Fill(0x00);
- for(i = 0;i<4;i++)
- {
- Lcd_Disp(i+1,0,currentMenu->menuItems[i+currentMenu->range_from]);
- }
- highlight(0,line,8,255);//反白顯示指定行
- }
- void func(void)
- {
- printf("hello");
- }
- 初始化菜單:
- void initMenu()
- {
- MainMenu.subMenus = malloc(sizeof(&MainMenu)*4);
- MainMenu.subMenus[0] = NULL;//第1到3項沒有子菜單置null,選擇后程序會調用func中相應項中的函數
- MainMenu.subMenus[1] = NULL;
- MainMenu.subMenus[2] = NULL;
- MainMenu.subMenus[3] = &searchMenu;//第四項查詢有子菜單
- MainMenu.func = malloc(sizeof(&func)*4);
- MainMenu.func[0] = NULL;
- MainMenu.func[1] = NULL;
- MainMenu.func[2] = &func;//當選擇了并按了確定，會執行func函數
- MainMenu.func[3] = NULL;
- MainMenu.parent = NULL;//表示是頂級菜單
-
- 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[2] = searchMenu.func[2] = searchMenu.func[3] = searchMenu.func[4] = searchMenu.func[5] = NULL;
- searchMenu.parent = &MainMenu;//上一級菜單是MainMenu.進入查詢子菜單后按返回鍵，將會顯示這個菜單 項
-
- currentMenu = &MainMenu;
-
- }
- main
- int main(void)
- {
-
- delay_init();
- uart_init(9600);
- Lcd_Init();
- KEY_Init();
- initMenu();
- display(currentMenu->selected);
- while(1)
- {
- key = KEY_Scan();
- if(key == 0)
- {
- delay_ms(10);
- continue;
- }
- printf("key %d is press",key);
- switch(key)
- {
- case 12://向上
- if(currentMenu->selected == 0)//到了第一項
- break;
- else
- {
- currentMenu->selected--;
- if(currentMenu->selected < currentMenu->range_from)//更新顯示的區域
- {
- currentMenu->range_from = currentMenu->selected;
- currentMenu->range_to = currentMenu->range_from+3;
- }
- display(currentMenu->selected);
- break;
- }
- case 8://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 4://Enter鍵
- {
- if(currentMenu->subMenus[currentMenu->selected] !=NULL)
- {
- currentMenu = currentMenu->subMenus[currentMenu->selected];
- display(0);
- }
- else
- {
- if(currentMenu->func[currentMenu->selected] != NULL)
- {
- currentMenu->func[currentMenu->selected]();//執行相應的函數
- display(currentMenu->selected);//返回后恢復原來的菜單狀態
- }
- }
- break;
- }
- case 3://返回鍵
- {
- if(currentMenu->parent!=NULL)//父菜單不為空，將顯示父菜單
- {
- currentMenu = currentMenu->parent;
- display(currentMenu->selected);
- }
- break;
- }
- default:
- break;
- }
- delay_ms(10);
- }
- }
ST公司關于STM3210E-EVAL演示版本的工程中就有菜單的代碼，現分享給大家：
um0549.rar
(5.26 MB, 下載次數: 1040)
2017-8-12 18:06 上傳
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