/*   2864 初始化     IC：SSD1306 */

VCC外部供电方式时初始化
       write_com(0xAE);    /*display off*/ 
      
       write_com(0x00);    /*set lower column address*/       
       write_com(0x10);    /*set higher column address*/       

       write_com(0x40);    /*set display start line*/ 
      
       write_com(0xB0);    /*set page address*/     
  
       write_com(0x81);    /*contract control*/
       write_com(0xcf);    /*128*/  
     
       write_com(0xA1);    /*set segment remap  0XA0*/ 
     
       write_com(0xA6);    /*normal / reverse*/  
     
       write_com(0xA8);    /*multiplex ratio*/
       write_com(0x3F);    /*duty = 1/64*/  
     
       write_com(0xC8);    /*Com scan direction  0XC0*/   
    
       write_com(0xD3);    /*set display offset*/
       write_com(0x00);       

       write_com(0xD5);    /*set osc division*/
       write_com(0x80);          

       write_com(0xD9);    /*set pre-charge period*/
       write_com(0xf1);      
 
       write_com(0xDA);    /*set COM pins*/
       write_com(0x12);      
 
       write_com(0xdb);    /*set vcomh*/
       write_com(0x40);       

       write_com(0x8d);    /*set charge pump disable*/
       write_com(0x10);      
 
       write_com(0xAF);    /*display ON*/    




VBAT外部供电方式时（IC内部升压）初始化
       write_com(0xAE);    /*display off*/ 
      
       write_com(0x00);    /*set lower column address*/       
       write_com(0x10);    /*set higher column address*/       

       write_com(0x40);    /*set display start line*/ 
      
       write_com(0xB0);    /*set page address*/     
  
       write_com(0x81);    /*contract control*/
       write_com(0xcf);    /*128*/  
     
       write_com(0xA1);    /*set segment remap   0XA0*/ 
     
       write_com(0xA6);    /*normal / reverse*/  
     
       write_com(0xA8);    /*multiplex ratio*/
       write_com(0x3F);    /*duty = 1/64*/  
     
       write_com(0xC8);    /*Com scan direction  0XC0*/   
    
       write_com(0xD3);    /*set display offset*/
       write_com(0x00);       

       write_com(0xD5);    /*set osc division*/
       write_com(0x80);          

       write_com(0xD9);    /*set pre-charge period*/
       write_com(0xf1);      
 
       write_com(0xDA);    /*set COM pins*/
       write_com(0x12);      
 
       write_com(0xdb);    /*set vcomh*/
       write_com(0x40);       

       write_com(0x8d);    /*set charge pump disable*/
       write_com(0x14);      
 
       write_com(0xAF);    /*display ON*/