/*QG-7240TSWEG01 SSD1306 SPI */ 

                  
void  ssd1306()
{
       RES=0;
    delay(1000);
    RES=1;
    delay(1000);
    
       write_i(0xAE);    /*display off*/   

       write_i(0x0C);    /*set lower column address*/       
       write_i(0x11);    /*set higher column address*/
    
       write_i(0xD5);    /*set osc division*/
       write_i(0xF0);

       write_i(0xA8);    /*multiplex ratio*/
       write_i(0x27);    /*duty = 1/40*/

       write_i(0xD3);    /*set display offset*/
       write_i(0x00);

       write_i(0x40);    /*Set Display Start Line */

       write_i(0x8d);    /*set charge pump enable*/
       write_i(0x95);

       write_i(0x20);     /*Set page address mode*/
       write_i(0x02);

       write_i(0xA1);    /*set segment remap*/ 

       write_i(0xC8);    /*Com scan direction*/

       write_i(0xDA);    /*set COM pins*/
       write_i(0x12);

       write_i(0xAD);    /*Internal IREF Setting*/
       write_i(0x30); 
       
       write_i(0x81);    /*contract control*/
       write_i(0xFF);    /*128*/

       write_i(0xD9);    /*set pre-charge period*/
       write_i(0x22);

       write_i(0xdb);    /*set vcomh*/
       write_i(0x20);

       write_i(0xA4);    /*Set Entire Display On/Off*/

       write_i(0xA6);    /*normal / reverse*/
       
       write_i(0xAF);    /*display ON*/                           

}

                   
/*¸±³جت½*/   
void write_i(unsigned char  ins)
{
  unsigned char  m,da;
  unsigned int j;
     DC=0;
     CS=0;
     da=ins;
  for(j=0;j<8;j++)
    {
      m=da;
      SCL=0;
      m=m&0x80;
      if(m==0x80)
        {
           SDA=1;
         }
       else
         {
             SDA=0;
         }
        
        da=da<<1;
        SCL=1;
      }
  CS=1;
}

void write_d(unsigned char  dat)
{
  unsigned char  m,da;
  unsigned int j;
     DC=1;
     CS=0;
     da=dat;
  for(j=0;j<8;j++)
    {
      m=da;
      SCL=0;
      m=m&0x80;
      if(m==0x80)
        {
           SDA=1;
         }
       else
         {
             SDA=0;
         }
        
        da=da<<1;
        SCL=1;
      }
  CS=1;
}

void delay(unsigned int i)							
{
   	while(i>0)
   	{
		i--;
   	}
}