LCD Interface with PIC18F4520 Starter Board

In this tutorial we will see how to interface alpha-numeric LCD with PIC18F4520 starter board.

LCD pin Connection

Starter board comes with on board header to connect 1x16,2x16 or 4x20 LCD in 4-bit Mode.
Below table shows the LCD pins connection.

RS	RW	EN	D0	D1	D2	D3	D4	D5	D6	D7
PB_0	PB_1	PB_2	P_NC	P_NC	P_NC	P_NC	PB_4	PB_5	PB_6	PB_7

• P_NC: Pin Not Connected

LCD 1x16

	#include "lcd.h"
	int main()
	{
	/*Connect RS->PB0, RW->PB1, EN->PB2 and data bus to PORTB.4 to PORTB.7*/
	LCD_SetUp(PB_0,PB_1,PB_2,P_NC,P_NC,P_NC,P_NC,PB_4,PB_5,PB_6,PB_7);
	LCD_Init(1,16);
	LCD_DisplayString("Explore Lcd 1x16");
	while(1);
	return (0);
	}

view raw pic16f877a_Lcd_4bit_Display_1x16.c hosted with ❤ by GitHub

LCD 2x16

	#include "lcd.h"
	int main()
	{
	/*Connect RS->PB0, RW->PB1, EN->PB2 and data bus to PORTB.4 to PORTB.7*/
	LCD_SetUp(PB_0,PB_1,PB_2,P_NC,P_NC,P_NC,P_NC,PB_4,PB_5,PB_6,PB_7);
	LCD_Init(2,16);
	LCD_DisplayString("Explore Embedded");
	LCD_DisplayString("Lcd 4-bit Mode");
	while(1);
	return (0);
	}

view raw pic16f877a_Lcd_4bit_Display_2x16.c hosted with ❤ by GitHub

LCD 4x20

	#include "lcd.h"
	int main()
	{
	/*Connect RS->PB0, RW->PB1, EN->PB2 and data bus to PORTB.4 to PORTB.7*/
	LCD_SetUp(PB_0,PB_1,PB_2,P_NC,P_NC,P_NC,P_NC,PB_4,PB_5,PB_6,PB_7);
	LCD_Init(4,20);
	LCD_DisplayString("Explore Embedded\n");
	LCD_DisplayString("LCD 4-bit Mode\n");
	LCD_DisplayString("20 x 4 \n");
	LCD_DisplayString(":) :O");
	while(1);
	return (0);
	}

view raw pic16f877a_Lcd_4bit_Display_4x20.c hosted with ❤ by GitHub

Demo

The images below shows 16x2, 16x1 and 20x4 LCD's interfaced with starter AVR.

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Downloads

Download the complete project folder from the below link: https://github.com/ExploreEmbedded/Pic16f877a_ExploreStarterPIC/archive/master.zip

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