Lcd 16x2 Display Interfacing with Pic Microcontroller [step by step]

Lcd 16x2 Display  

In this tutorial, I will show how to interface LCD display with pic18f2550 microcontroller.

Generally, LCD display has 16 pins. 16x2 means the display has 12 column and 2 row.

The picture given below shows about rows and columns.

The picture is given below discuss each pin.

 Proteus Project :

Now we are going to create a new project in Proteus and follow instructions given below :

According to the instruction pick  'pic18f2550', crystal, 22pf capacitor, 5Kohm variable resistor, power and ground. For LCD display please type "LM016L" on keywords.

In this tutorial, we will use 4 data pin [D4-D7]. Now complete the circuit as given below :

Lcd 16x2 Display  Interfacing with Microcontroller [step by step]

We have completed the circuit. Now we need the source hex file. So create a new project in MikroC.

Now follow the instructions:

MikroC Source Code :

MikroC LCD Library :

1. Lcd_Init             
2. Lcd_Out      
3. Lcd_Out_Cp
4. Lcd_Chr
5. Lcd_Chr_Cp
6. Lcd_Cmd

Description :

1.Lcd_Init   :  Initializes Lcd module.

2.Lcd_Out  :  Prints text on Lcd starting from specified position. Both string variables and literals can be passed as a text.

Parameters :

1. row: starting position row number
2. column: starting position column number
3. text: text to be written

3. Lcd_Out_Cp :  Prints text on Lcd at the current cursor position. Both string variables and literals can be passed as a text.

4.Lcd_Chr :  Prints character on Lcd at a specified position. Both variables and literals can be passed as a character. Parameters :

1. row: writing position row number
2. column: writing position column number
3. out_char: character to be written

5.Lcd_Chr_Cp : Prints character on Lcd at the current cursor position. Both variables and literals can be passed as a character.

 6.Lcd_Cmd :   Sends command to Lcd.
a)     Lcd_Cmd(_LCD_SHIFT_RIGHT)  :This function is used for shifting on the right hand side .

          Lcd_Cmd(_LCD_SHIFT_RIGHT);

 Lcd_Cmd(_LCD_SHIFT_RIGHT);

b)     Lcd_Cmd(_LCD_SHIFT_LEFT)  :This function is used for shifting on the left hand side.
c)     Lcd_Cmd(_LCD_CURSOR_OFF) : This function is used for setting the cursor off .
d)     Lcd_Cmd(_LCD_CLEAR) :To Clear the lcd .

Source Code :

///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

sbit LCD_RS at LATB7_bit;

sbit LCD_EN at LATB6_bit;

sbit LCD_D4 at LATB5_bit;

sbit LCD_D5 at LATB4_bit;

sbit LCD_D6 at LATB3_bit;

sbit LCD_D7 at LATB2_bit;

sbit LCD_RS_Direction at TRISB7_bit;

sbit LCD_EN_Direction at TRISB6_bit;

sbit LCD_D4_Direction at TRISB5_bit;

sbit LCD_D5_Direction at TRISB4_bit;

sbit LCD_D6_Direction at TRISB3_bit;

sbit LCD_D7_Direction at TRISB2_bit;

// End Lcd module connections

void main(){

  ADCON1=0x0F;            // Disable Analog to Digital Converter

  CMCON=7;                    // Disable Comparator

  Lcd_Init();                        // Initialize Lcd

      while(1){

  Lcd_Cmd(_LCD_CLEAR);               // Clear display

  Lcd_Cmd(_LCD_CURSOR_OFF);          // Cursor off

  Lcd_Out(1,1,"Microcontroller");

  Lcd_Out(2,4,"Tutorial");                         // Write text in first row

  delay_ms(400);

  }

}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

 Now create a hex file with MikroC .Please follow the instructions :

Now go to the hardware and make double click on the Microcontroller. Please follow the instructions:

Lcd 16x2 Display  Interfacing with Microcontroller [step by step]

 I was just trying to make something good for a beginner. If I made something wrong, forgive me .

Thank You !