/* IC : sh1107 4 wire serial interface */
/* Module : 128*80-COG */
 
                   
/*¸±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--;
   	}
}


                   
void  sh1107()
{
       write_i(0xAE);    /*display off*/

       write_i(0x00);    /*set lower column address*/       
       write_i(0x10);    /*set higher column address*/

       write_i(0x20);    /* Set Memory addressing mode (0x20/0x21) */
            
       write_i(0x81);    /*contract control*/
       write_i(0x2f);    /*b0*/

       write_i(0xA0);    /*set segment remap*/

       write_i(0xC0);    /*Com scan direction*/

       write_i(0xA4);    /*Disable Entire Display On (0xA4/0xA5)*/ 
      
       write_i(0xA6);    /*normal / reverse*/

       write_i(0xD5);    /*set osc division*/
       write_i(0x91);       
       
       write_i(0xD9);    /*set pre-charge period*/
       write_i(0x22);
     
       write_i(0xdb);    /*set vcomh*/
       write_i(0x3f);

       write_i(0xA8);    /*multiplex ratio*/
       write_i(0x4F);    /*duty = 1/80*/
               
       write_i(0xD3);    /*set display offset*/
       write_i(0x68);    /*18*/
       
       write_i(0xdc);    /*Set Display Start Line*/
       write_i(0x00);
            
       write_i(0xad);    /*set charge pump enable*/
       write_i(0x8a);     /*Set DC-DC enable (a=0:disable; a=1:enable) */
       
       write_i(0xAF);    /*display ON*/                           

}