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1602 LCD Display Module

Description


This is a basic 16 character by 2 line display. Black text on Green/Blue background. Interface code is freely available. You will need 7 or 11 general I/O pins to interface to this LCD screen. Includes LED backlight.

Model:CT0001BS
Model:DLC01602B
16x2 Character LCD Display Module - Yello11.jpg LCD1602 Module.jpg

pin mapping of LCD module


Pin Number Sign Remark Pin Number Sign Remark
1 VSS GND 9 D2 Data I/O
2 VDD VCC 10 D3 Data I/O
3 VL Contrast ratio 11 D4 Data I/O
4 RS Data/Command Choice 12 D5 Data I/O
5 R/W Write/Read Choice 13 D6 Data I/O
6 E Enble 14 D7 Data I/O
7 D0 Data I/O 15 BLA Back light anode
8 D1 Data I/O 16 BLK Back light cathanode

How to control


Hardware Install

Connect the LCD module with Arduino following picture.

Wire connect.jpg

Software upload

Upload the following code to the Arduino or download the Arduino library

int LCD1602_RS=12;   
int LCD1602_RW=11;   
int LCD1602_EN=10;   
int DB[] = { 6, 7, 8, 9};
char str1[]="Welcome to";
char str2[]="Elecrow";
char str3[]="this is the";
char str4[]="4-bit interface";

void LCD_Command_Write(int command)
{
 int i,temp;
 digitalWrite( LCD1602_RS,LOW);
 digitalWrite( LCD1602_RW,LOW);
 digitalWrite( LCD1602_EN,LOW);

 temp=command & 0xf0;
 for (i=DB[0]; i <= 9; i++)
 {
   digitalWrite(i,temp & 0x80);
   temp <<= 1;
 }

 digitalWrite( LCD1602_EN,HIGH);
 delayMicroseconds(1);
 digitalWrite( LCD1602_EN,LOW);

 temp=(command & 0x0f)<<4;
 for (i=DB[0]; i <= 9; i++)
 {
   digitalWrite(i,temp & 0x80);
   temp <<= 1;
 }

 digitalWrite( LCD1602_EN,HIGH);
 delayMicroseconds(1); 
 digitalWrite( LCD1602_EN,LOW);
}

void LCD_Data_Write(int dat)
{
 int i=0,temp;
 digitalWrite( LCD1602_RS,HIGH);
 digitalWrite( LCD1602_RW,LOW);
 digitalWrite( LCD1602_EN,LOW);

 temp=dat & 0xf0;
 for (i=DB[0]; i <= 9; i++)
 {
   digitalWrite(i,temp & 0x80);
   temp <<= 1;
 }

 digitalWrite( LCD1602_EN,HIGH);
 delayMicroseconds(1);
 digitalWrite( LCD1602_EN,LOW);

 temp=(dat & 0x0f)<<4;
 for (i=DB[0]; i <= 9; i++)
 {
   digitalWrite(i,temp & 0x80);
   temp <<= 1;
 }

 digitalWrite( LCD1602_EN,HIGH);
 delayMicroseconds(1); 
 digitalWrite( LCD1602_EN,LOW);
}

void LCD_SET_XY( int x, int y )
{
  int address;
  if (y ==0)    address = 0x80 + x;
  else          address = 0xC0 + x;
  LCD_Command_Write(address); 
}

void LCD_Write_Char( int x,int y,int dat)
{
  LCD_SET_XY( x, y ); 
  LCD_Data_Write(dat);
}

void LCD_Write_String(int X,int Y,char *s)
{
    LCD_SET_XY( X, Y );    //设置地址 
    while (*s)             //写字符串
    {
      LCD_Data_Write(*s);   
      s ++;
    }
}

void setup (void) 
{
  int i = 0;
  for (i=6; i <= 12; i++) 
   {
     pinMode(i,OUTPUT);
   }
  delay(100);
  LCD_Command_Write(0x28);//4线 2行 5x7
  delay(50); 
  LCD_Command_Write(0x06);
  delay(50); 
  LCD_Command_Write(0x0c);
  delay(50); 
  LCD_Command_Write(0x80);
  delay(50); 
  LCD_Command_Write(0x01);
  delay(50); 

}

void loop (void)
{
   LCD_Command_Write(0x01);
   delay(50);
   LCD_Write_String(3,0,str1);//第1行,第4个地址起
   delay(50);
   LCD_Write_String(4,1,str2);//第2行,第2个地址起
   delay(5000);
   LCD_Command_Write(0x01);
   delay(50);
   LCD_Write_String(0,0,str3);
   delay(50);
   LCD_Write_String(0,1,str4);
   delay(5000);

}

Resource


Arduino library