May 11th, 2010

ITDB02-2.4 8Bit Mode Demo

Application Note, by ITead.

We have showed how to use the Arduino control the ITBD02 for refreshing the screen , but the demo is in 16 bit mode , we received some E-mail require the 8 Bit mode demo, so we now publish the new demo which using the Arduino to control the ITDB02-2.4 display a picture in 8 bit mode.

The connection is :

DB9 – DB16 to D0 – D7 of Arduino ; DB0 – DB8 to GND
RS to D8 ; WR to D9 ; RD to 3.3V
CS to D10 ; RESET to D11 ; LDEA to 3.3V
VCC to 5V; GND to GND

Download the code below into Arduino :

#include <avr/pgmspace.h>
 
#define LCD_RS 8         
#define LCD_WR 9      
#define LCD_CS 10       
#define LCD_REST 11
 
extern unsigned char image[3200];
 
void LCD_Writ_Bus(char VH,char VL)   
{   
  unsigned char i,temp,data; 
  data=VH; 
  for(i=0;i<8;i++)
  {
    temp=(data&0x01);
    if(temp)
      digitalWrite(i,HIGH);
    else
      digitalWrite(i,LOW);
    data=data>>1;
  }
  digitalWrite(LCD_WR,LOW);
  digitalWrite(LCD_WR,HIGH);
  data=VL;
  for(i=0;i<8;i++)
  {
    temp=(data&0x01);
    if(temp)
      digitalWrite(i,HIGH);
    else
      digitalWrite(i,LOW);
    data=data>>1;
  }		
  digitalWrite(LCD_WR,LOW);
  digitalWrite(LCD_WR,HIGH);
}
 
 
void LCD_Write_COM(char VH,char VL)  //发送命令
{   
  digitalWrite(LCD_RS,LOW);
  LCD_Writ_Bus(VH,VL);
}
 
 
void LCD_Write_DATA(char VH,char VL)    //发送数据
{
  digitalWrite(LCD_RS,HIGH);
  LCD_Writ_Bus(VH,VL);
}
 
void Address_set(unsigned int x1,unsigned int y1,unsigned int x2,unsigned int y2)
{
  LCD_Write_COM(0x00,0x20);
  LCD_Write_DATA(x1>>8,x1);    
  LCD_Write_COM(0x00,0x21);
  LCD_Write_DATA(y1>>8,y1);   
  LCD_Write_COM(0x00,0x50);
  LCD_Write_DATA(x1>>8,x1);   
  LCD_Write_COM(0x00,0x52);
  LCD_Write_DATA(y1>>8,y1);   
  LCD_Write_COM(0x00,0x51);
  LCD_Write_DATA(x2>>8,x2);  
  LCD_Write_COM(0x00,0x53);
  LCD_Write_DATA(y2>>8,y2);   
  LCD_Write_COM(0x00,0x22);           				 
}
 
void LCD_Init(void)
{
 
  digitalWrite(LCD_REST,HIGH);
  delay(5); 
  digitalWrite(LCD_REST,LOW);
  delay(5);
  digitalWrite(LCD_REST,HIGH);
  delay(5);
 
  digitalWrite(LCD_CS,LOW);  
  //************* Start Initial Sequence **********//
  LCD_Write_COM(0x00,0xE5); 
  LCD_Write_DATA(0x78,0xF0); // set SRAM internal timing
  LCD_Write_COM(0x00,0x01); 
  LCD_Write_DATA(0x01,0x00); // set SS and SM bit
  LCD_Write_COM(0x00,0x02); 
  LCD_Write_DATA(0x07,0x00); // set 1 line inversion
  LCD_Write_COM(0x00,0x03); 
  LCD_Write_DATA(0x10,0x30); // set GRAM write direction and BGR=1.
  LCD_Write_COM(0x00,0x04); 
  LCD_Write_DATA(0x00,0x00); // Resize register
  LCD_Write_COM(0x00,0x08); 
  LCD_Write_DATA(0x02,0x07); // set the back porch and front porch
  LCD_Write_COM(0x00,0x09); 
  LCD_Write_DATA(0x00,0x00); // set non-display area refresh cycle ISC[3:0]
  LCD_Write_COM(0x00,0x0A); 
  LCD_Write_DATA(0x00,0x00); // FMARK function
  LCD_Write_COM(0x00,0x0C); 
  LCD_Write_DATA(0x00,0x00); // RGB interface setting
  LCD_Write_COM(0x00,0x0D); 
  LCD_Write_DATA(0x00,0x00); // Frame marker Position
  LCD_Write_COM(0x00,0x0F); 
  LCD_Write_DATA(0x00,0x00); // RGB interface polarity
  //*************Power On sequence ****************//
  LCD_Write_COM(0x00,0x10); 
  LCD_Write_DATA(0x00,0x00); // SAP, BT[3:0], AP, DSTB, SLP, STB
  LCD_Write_COM(0x00,0x11); 
  LCD_Write_DATA(0x00,0x07); // DC1[2:0], DC0[2:0], VC[2:0]
  LCD_Write_COM(0x00,0x12); 
  LCD_Write_DATA(0x00,0x00); // VREG1OUT voltage
  LCD_Write_COM(0x00,0x13); 
  LCD_Write_DATA(0x00,0x00); // VDV[4:0] for VCOM amplitude
  LCD_Write_COM(0x00,0x07); 
  LCD_Write_DATA(0x00,0x01);
  delay(50); // Dis-charge capacitor power voltage
  LCD_Write_COM(0x00,0x10); 
  LCD_Write_DATA(0x10,0x90); // 1490//SAP, BT[3:0], AP, DSTB, SLP, STB
  LCD_Write_COM(0x00,0x11); 
  LCD_Write_DATA(0x02,0x27); // DC1[2:0], DC0[2:0], VC[2:0]
  delay(50); // Delay 50ms
  LCD_Write_COM(0x00,0x12); 
  LCD_Write_DATA(0x00,0x1F); //001C// Internal reference voltage= Vci;
  delay(50); // Delay 50ms
  LCD_Write_COM(0x00,0x13); 
  LCD_Write_DATA(0x15,0x00); //0x1000//1400   Set VDV[4:0] for VCOM amplitude  1A00
  LCD_Write_COM(0x00,0x29); 
  LCD_Write_DATA(0x00,0x27); //0x0012 //001a  Set VCM[5:0] for VCOMH  //0x0025  0034
  LCD_Write_COM(0x00,0x2B); 
  LCD_Write_DATA(0x00,0x0D); // Set Frame Rate   000C
  delay(50); // Delay 50ms
  LCD_Write_COM(0x00,0x20); 
  LCD_Write_DATA(0x00,0x00); // GRAM horizontal Address
  LCD_Write_COM(0x00,0x21); 
  LCD_Write_DATA(0x00,0x00); // GRAM Vertical Address
  // ----------- Adjust the Gamma Curve ----------//
  LCD_Write_COM(0x00,0x30); 
  LCD_Write_DATA(0x00,0x00);
  LCD_Write_COM(0x00,0x31); 
  LCD_Write_DATA(0x07,0x07);
  LCD_Write_COM(0x00,0x32); 
  LCD_Write_DATA(0x03,0x07);
  LCD_Write_COM(0x00,0x35); 
  LCD_Write_DATA(0x02,0x00);
  LCD_Write_COM(0x00,0x36); 
  LCD_Write_DATA(0x00,0x08);//0207
  LCD_Write_COM(0x00,0x37); 
  LCD_Write_DATA(0x00,0x04);//0306
  LCD_Write_COM(0x00,0x38); 
  LCD_Write_DATA(0x00,0x00);//0102
  LCD_Write_COM(0x00,0x39); 
  LCD_Write_DATA(0x07,0x07);//0707
  LCD_Write_COM(0x00,0x3C); 
  LCD_Write_DATA(0x00,0x02);//0702
  LCD_Write_COM(0x00,0x3D); 
  LCD_Write_DATA(0x1D,0x04);//1604
 
    //------------------ Set GRAM area ---------------//
  LCD_Write_COM(0x00,0x50); 
  LCD_Write_DATA(0x00,0x00); // Horizontal GRAM Start Address
  LCD_Write_COM(0x00,0x51); 
  LCD_Write_DATA(0x00,0xEF); // Horizontal GRAM End Address
  LCD_Write_COM(0x00,0x52); 
  LCD_Write_DATA(0x00,0x00); // Vertical GRAM Start Address
  LCD_Write_COM(0x00,0x53); 
  LCD_Write_DATA(0x01,0x3F); // Vertical GRAM Start Address
  LCD_Write_COM(0x00,0x60); 
  LCD_Write_DATA(0xA7,0x00); // Gate Scan Line
  LCD_Write_COM(0x00,0x61); 
  LCD_Write_DATA(0x00,0x01); // NDL,VLE, REV
  LCD_Write_COM(0x00,0x6A); 
  LCD_Write_DATA(0x00,0x00); // set scrolling line
  //-------------- Partial Display Control ---------//
  LCD_Write_COM(0x00,0x80); 
  LCD_Write_DATA(0x00,0x00);
  LCD_Write_COM(0x00,0x81); 
  LCD_Write_DATA(0x00,0x00);
  LCD_Write_COM(0x00,0x82); 
  LCD_Write_DATA(0x00,0x00);
  LCD_Write_COM(0x00,0x83); 
  LCD_Write_DATA(0x00,0x00);
  LCD_Write_COM(0x00,0x84); 
  LCD_Write_DATA(0x00,0x00);
  LCD_Write_COM(0x00,0x85); 
  LCD_Write_DATA(0x00,0x00);
  //-------------- Panel Control -------------------//
  LCD_Write_COM(0x00,0x90); 
  LCD_Write_DATA(0x00,0x10);
  LCD_Write_COM(0x00,0x92); 
  LCD_Write_DATA(0x06,0x00);
  LCD_Write_COM(0x00,0x07); 
  LCD_Write_DATA(0x01,0x33); // 262K color and display ON
  digitalWrite(LCD_CS,HIGH);  
 
}
 
void Pant(char VH,char VL)
{
  int i,j;
  digitalWrite(LCD_CS,LOW); 
  Address_set(0,0,240,320);
  for(i=0;i<320;i++)
  {
    for (j=0;j<240;j++)
    {
      LCD_Write_DATA(VH,VL);
    }
 
  }
  digitalWrite(LCD_CS,HIGH);  
}
 
void setup()
{
  unsigned char p;
  char hi,lo;
  int i,j,k;
  for(p=0;p<20;p++)
  {
    pinMode(p,OUTPUT);
  }
 
  LCD_Init();          
  // Pant(0xff,0xff);           						
 
  digitalWrite(LCD_CS,LOW);  
  for(k=0;k<8;k++)     
  {
    for(j=0;j<6;j++)
    {	
      Address_set(40*j,40*k,40*j+39,40*k+39);
      for(i=0;i<1600;i++)
      {
        hi=pgm_read_byte(&image[i*2+1]);
        lo=pgm_read_byte(&image[i*2]);
        LCD_Write_DATA(hi,lo);
 
      }
    }
  }
  digitalWrite(LCD_CS,HIGH); 
}
 
void loop()
{
 
}

Reset the Arduino board , you will see the screen full with the picture that in image[3200] .

IMG_0020

You can download the demo project here( include data.c )

  ITDB02 Demo (8Bit) (4.4 KiB, 850 hits)

You may also be interested in these posts:

  1. Demo code for ITDB02 TFT LCD
  2. ITDB02 Touch Screen Handwrite Demo
  3. Initialization For ILI9325C ILI9325D ILI9327 And HX8347-A
  4. ITDB02-2.4 display with Arduino
  5. ITDB02 Display Lib For STM32 GCC

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Responses to “ITDB02-2.4 8Bit Mode Demo”

  		1.

    Hello!
    I have a problem with ITDB02 which I cannot resolve. In your demo code is a such string:
    LCD_Write_COM(0×00,0xE5);
    LCD_Write_DATA(0×78,0xF0); // set SRAM internal timing
    Where I can find other timings settings (datasheet which in product page in iTead Store do not describes a commands bigger that 0xA5h). 0xE5 command – and others bigger than 0xA5, where Ican find a documentation for them?
    Thank you.
    Anton at December 9, 2011 3:09 AM Reply

  2. @Anton, this post is for the old ITDB02-2.4 module , now we are selling is the ITDB02-2.4D, they are different.
    ITead at December 9, 2011 2:39 PM Reply

  3. @ITead: which differents with ITDB02-2.4DWOT (without touch)? I cannot find initialization code for that. Command 0×00E5 is works but I don’t know how it works. Can you place demo code with comments for it, please?:)
    Anton at December 10, 2011 12:14 PM Reply

  4. How to enable that LCD in 65536 color mode?)
    Anton at December 10, 2011 12:58 PM Reply

  5. If any body have an ILI9325D datasheet? Zip archive frome iStore contains another model datasheet(((
    Anton at December 12, 2011 5:51 PM Reply
  1. こぶたのラッパ » オラ、ドラゴンレーダーを作るぞ(9) (,September 19, 2010)

    [...] ここまでブログを書いてきてあれっと思ったのですが、なぜかLEDAを5Vにつなげていました。 なんでだっけと思いだしていたところ、ITDB02-2.4 8Bit Mode Demoに書かれている接続方法を真似たことを思い出しました。 [...]

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