NOTE:VCI=3.3V,使用RGB接口必需要用SPI对LCD进行初始化.
//****************************************************************
void write_command (unsigned char y) // (uchar y,uchar x)
{
  unsigned char i;
csb=0;
sclb=0;
sdi=0;
sclb=1;
for(i=0;i<8;i++)
    {
     sclb=0;      
      if (y&0x80)
       {
          sdi=1;
        }
          else
         {
          sdi=0;
         }
       sclb=1;
      y=y<<1;
    }
csb=1;
}
//***************************************************************
void write_data(unsigned char w) // (uchar w, uchar v)
{
  unsigned char i;
csb=0;
sclb=0;
sdi=1;
sclb=1;
for(i=0;i<8;i++)
 {
  sclb=0;
     if (w&0x80)
     {
        sdi=1;
       }
          else
        {
         sdi=0;
        }
   sclb=1;
   w=w<<1;
    }
csb=1;
}
/*************************************************/
void initi(void)
{
   res=1;
   delay(1);
   res=0;
   delay(10);
   res=1;
   delay(120);
//--------------------------------ST7789S Frame rate setting----------------------------------//
write_command(0x11); 
delay(120);      //Delay 120ms 

write_command(0x36);  //Memory data access contro   
write_data(0x00);   

write_command(0xB2); //  Porch Setting 
write_data(0x0C);   
write_data(0x0C);   
write_data(0x00);   
write_data(0x33);   
write_data(0x33);   

write_command(0xB7); //Gate Control    
write_data(0x70); //VGH,VGL 

write_command(0xBB);//VCOM
write_data(0x3A);   

write_command(0xC0);     
write_data(0x2C);   

write_command(0xC2);     
write_data(0x01);   

write_command(0xC3);  //VAP
write_data(0x14);//14   

write_command(0xC4);     
write_data(0x20);   

write_command(0xC6);     
write_data(0x0F); //60HZ 0A

write_command(0xD0);     
write_data(0xA4);   
write_data(0xA1); // AVDD VCL

write_command(0xE0);     
write_data(0xD0);   
write_data(0x07);   
write_data(0x0D);   
write_data(0x09);   
write_data(0x08);   
write_data(0x25);   
write_data(0x28);   
write_data(0x53);   
write_data(0x39);   
write_data(0x12);   
write_data(0x0B);   
write_data(0x0A);   
write_data(0x17);   
write_data(0x34);   

write_command(0xE1);     
write_data(0xD0);   
write_data(0x07);   
write_data(0x0D);   
write_data(0x09);   
write_data(0x09);   
write_data(0x25);   
write_data(0x29);   
write_data(0x35);   
write_data(0x39);   
write_data(0x13);   
write_data(0x0A);   
write_data(0x0A);   
write_data(0x16);
  
write_command(0x21); //反显

//*********SET RGB Interfae***************
write_command(0xB0); 
write_data(0x11); //set RGB interface and DE mode.
write_data(0x00); 
write_data(0x00); 

write_command(0xB1); 
write_data(0x40); // set DE mode ; SET Hs,Vs,DE,DOTCLK signal polarity 42
write_data(0x00); 
write_data(0x00); 

write_command(0x3a); 
write_data(0x50); //18 RGB ,55-16BIT RGB

//************************

write_command(0x2A); //
write_data(0x00);
write_data(0x00);
write_data(0x00);
write_data(0xEF);

write_command(0x2B); //
write_data(0x00);
write_data(0x00);
write_data(0x01);
write_data(0x3F);

write_command(0x29); //display on

write_command(0x2c); 

}
//*********************************************************************
void EnterSleep (void)
{
    write_command(0x28);
    delay(20);
    write_command(0x10); 

    RGB_OFF();
   delay(50);
  }

//*********************************************************
void ExitSleep (void)

 {
    RGB_ON();
    delay(20);
    write_command(0x11);
    delay(120);
    write_command(0x29);

   }