const unsigned char lut_data[]=
{
   0x82,0x00,0x00,0x00,0xAA,0x00,0x00,0x00,0xAA,
   0xAA,0x00,0x00,0xAA,0xAA,0xAA,0x00,0x55,0xAA,
   0xAA,0x00,0x55,0x55,0x55,0x55,0xAA,0xAA,0xAA,
   0xAA,0x55,0x55,0x55,0x55,0xAA,0xAA,0xAA,0xAA,
   0x15,0x15,0x15,0x15,0x05,0x05,0x05,0x05,0x01,
   0x01,0x01,0x01,0x00,0x00,0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
   0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x41,
   0x45,0xF1,0xFF,0x5F,0x55,0x01,0x00,0x00,0x00
};

//-------------------------------------------------------------------------
void SPI_out (unsigned char data)
{
  unsigned char count;

  CS=0;
  for(count=0;count<8;count++)
  {
    if(data&0x80)
      SDIN=1;
    else
      SDIN=0;
    SCLK=1;
    data<<=1;
    SCLK=0;
  }
  CS=1;
}

void writecmd(char data)
{
  DC=0;
  SPI_out(data);
}

void writedata(char data)
{
  DC=1;
  SPI_out(data);
}

//-------------------------------------------------------------------------
void init(void)
{
   unsigned char i;

   CS=1;             //perform reset CS idle=1
   SCLK=0;           //SCLK idle=0
   RST=1;
   delayms(1);
   RST=0;
   delayms(2);
   RST=1;
   delayms(3);

   writecmd(0x10);   //do not enter deep sleep mode
   writedata(0x00);

   writecmd(0x11);  //data entry mode setting,0x01,Y decrement,X increment
   writedata(0x01);
   writecmd(0x44);  //set RAM X-address start/end position
   writedata(0x00); //RAM X -address start at 00H
   writedata(0x11); //RAM X-address end at 11H->(17D),that is (17+1*4=72)
   writecmd(0x45);  //set RAM Y-address start/end position
   writedata(0xAB); //RAM Y-address start at ABH->(171D)
   writedata(0x00); //RAM Y-address end at 00H
   writecmd(0x4E);  //set RAM x address count to 0;
   writedata(0x00);
   writecmd(0x4F);  //set RAM Y address count to 172->0;
   writedata(0xAB);

   writecmd(0xF0);  //booster feedback selection,0x1F->internal feedback is used
   writedata(0x1F); //0x83
   writecmd(0x21);  //bypass the RAM data into the display,enable pass
   writedata(0x03);
   writecmd(0x2C);  //write VCOM register
   writedata(0xA0);
   writecmd(0x3C);  //board waveform, board voltage
   writedata(0x63);
   writecmd(0x22);  //enable sequence, CLK->CP->
   writedata(0xC4);


   writecmd(0x32);  //write LUT register
   for(i=0;i<90;i++)
       writedata(lut_data[i]);
}

//-------------------------------------------------------------------------
void fill_display(uchar dat) //0xFF=white, 0x00=black, 0x55=gray 1, 0xAA=gray 2
{
   unsigned int i;

   writecmd(0x24);//data write into RAM after this command

   for(i=0;i<3096;i++) //3096 = 172x72/8x2, (2-Bit per dot)
   {
      writedata(dat);
   }
   writecmd(0x20);

   //Booster diable
   writecmd(0x22); //display updata sequence option ,in page 33
   writedata(0x02);
   writecmd(0x20);
}