Note: PORT's connection will be different based on the kit you are using by the manufacturer for PIC18F.
Program:
#include <pic18f4550.h>
#define LCD_EN PORTCbits.RC1 // LCD Enable
#define LCD_RS PORTCbits.RC0 // Register Set
// To generate delay
void delay()
{
unsigned int i;
for(i=0;i<5000;i++);
}
unsigned char string1[] = {'C','O','D','I','N','G'};
unsigned char string2[] = {'A','T','H','A','R','V','A'};
// To Write Data in Command Register
void sendCommand(unsigned char command)
{
LCD_RS = 0; // To Select Command Register
delay();
// Whatever data you want to store in command register
// that data should be placed on data bus
// PORTB is connected to Data-bus
// to latch this data enable terminal should be at logic 1 and 0
// i.e High to Low pulse
LCD_EN = 1;
delay();
PORTB = command;
delay();
LCD_EN = 0;
delay();
}
// To Write Data in Data Register
void sendData(unsigned char lcd_data)
{
LCD_RS = 1; // Select Data Register
delay();
LCD_EN = 1;
delay();
PORTB = lcd_data; // ACSII value of data
delay();
LCD_EN = 0;
delay();
}
void main()
{
unsigned int i;
unsigned char p;
TRISB = 0x00; // PORTB as Output
TRISCbits.RC0 = 0; // PORTC 0 as Output
TRISCbits.RC1 = 0; // PORTC 1 as Output
// Initialize LCD
sendCommand(0x38); // Select 16X2 LCD
sendCommand(0x0E); // Display on and Cursor On
sendCommand(0x0E); // Clear LCD
// to display 2 string
while(1)
{
sendCommand(0x80); // First Position of First Row
for(i=0;i<6;i++)
{
p = string1[1];
sendData(p);
}
sendCommand(0xC0); // First Position of Second Row
for(i=0;i<7;i++)
{
p = string2[i];
sendData(p);
}
delay();
}
return;
}
