简介：

程序思想移植于：

硬件：

ESP8266：

ESP8266	NODEMCU
gpio5	D1	SCL
gpio4	D2	SDA

程序示例：

/*@作者：刘泽文@板卡：ESP8266@功能：基于U8g2的简单菜单演示@时间：2020/5/3*/#include 
   
    #include 
    
     #include 
     
      #define UP_KEY      D6 //gpio12#define M_KEY       D5 //gpio14#define DOWN_KEY    D7 //gpio13//读取键值#define keyup     digitalRead(UP_KEY)#define keyenter  digitalRead(M_KEY)#define keydown   digitalRead(DOWN_KEY)uint8_t func_index=0;void (*current_operation_index)();void fun1();void fun2();void fun3();void fun4();void page_1_to_4();typedef struct{	uint8_t current;	uint8_t up;//向上翻索引号	uint8_t down;//向下翻索引号	uint8_t enter;//确认索引号	void (*current_operation)();}key_table;key_table table[7]={	{0,3,1,0,(*fun1)},	{1,0,2,1,(*fun2)},	{2,1,3,2,(*fun3)},	{3,2,0,3,(*fun4)},};U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, /* reset=*/ U8X8_PIN_NONE);void setup(void){  u8g2.begin();  u8g2.enableUTF8Print();  ESP.wdtEnable(5000);//看门狗初始化} void loop(void){  /*******************find index****************************/	if((keyup==0)||(keydown==0)||(keyenter==0))	{		delay(10);//消抖		if(keyup==0)		{			func_index=table[func_index].up;    //向上翻			while(!keyup)ESP.wdtFeed();// 喂 狗    		}		if(keydown==0)  	{    	func_index=table[func_index].down;    //向下翻    	while(!keydown)ESP.wdtFeed();// 喂 狗    		}    if(keyenter==0)                     		{                		  func_index=table[func_index].enter;    //确认		  while(!keyenter)ESP.wdtFeed();// 喂 狗		}	}	current_operation_index=table[func_index].current_operation;	(*current_operation_index)();//执行当前操作函数  ESP.wdtFeed();// 喂 狗     }void fun1(){  u8g2.clearBuffer();  page_1_to_4();  //显示光标  u8g2.setFont(u8g2_font_open_iconic_all_1x_t);  u8g2.drawGlyph(5, 16*(1%4==0? 4:1%4)-4,118);  u8g2.sendBuffer();}void fun2(){  u8g2.clearBuffer();  page_1_to_4();  //显示光标  u8g2.setFont(u8g2_font_open_iconic_all_1x_t);  u8g2.drawGlyph(5, 16*(2%4==0? 4:2%4)-4,118);  u8g2.sendBuffer();}void fun3(){  u8g2.clearBuffer();  page_1_to_4();  //显示光标  u8g2.setFont(u8g2_font_open_iconic_all_1x_t);  u8g2.drawGlyph(5, 16*(3%4==0? 4:3%4)-4,118);  u8g2.sendBuffer();}void fun4(){  u8g2.clearBuffer();  page_1_to_4();  //显示光标  u8g2.setFont(u8g2_font_open_iconic_all_1x_t);  u8g2.drawGlyph(5, 16*(4%4==0? 4:4%4)-4,118);  u8g2.sendBuffer();}void page_1_to_4(){  u8g2.setFont(u8g2_font_wqy14_t_gb2312a);  u8g2.setCursor(20, 16*1-2);  u8g2.print(" 1.桌面设置");  u8g2.setCursor(20, 16*2-2);  u8g2.print(" 2.屏幕设置");  u8g2.setCursor(20, 16*3-2);  u8g2.print(" 3.网络信息");  u8g2.setCursor(20, 16*4-2);  u8g2.print(" 4.智能配网");}

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