/*  Name     : main.c
 *  Purpose  : Source code for LCD Interfacing with ARM LPC1248.
 *  Author   : Gemicates
 *  Date     : 2018-19-01
 *  Website  : www.gemicates.org
 *  Revision : None
 */
#include<lpc21xx.h> 					    // header file for LPC21XX series
 
#define LCD (0xff<<16)
#define RS (1<<13) 					    // register select pin
#define RW (1<<14) 					    // read write pin
#define EN (1<<15) 					    // enable pin
                                       		            // Function declarations
void delay_fv(unsigned int x,int y);
void lcd_display(unsigned int x);
void cmd(unsigned char m);
void lcd_ini();
 
int main()
   {
        PINSEL0=0X00000000;                                 // select PORT0 as GPIO mode
        IO0DIR=0XFFFFFFFF;                                  // make PORT0 pin as Output mode 
        lcd_ini();
        while(1)                                            // Repeat(loop) forever
          {
                lcd_ini();
                lcd_display(' ');
                lcd_display('W');
                delay_fv(1000,400);
                lcd_display('E');
                delay_fv(1000,400);
                lcd_display('L');
                delay_fv(1000,400);
                lcd_display('C');
                delay_fv(1000,400);
                lcd_display('O');
                delay_fv(1000,400);
                lcd_display('M');
                delay_fv(1000,400);
                lcd_display('E');
                delay_fv(1000,400);
                lcd_display(' ');
                delay_fv(1000,400);
                lcd_display('T');
                delay_fv(1000,400);
                lcd_display('O');
                delay_fv(1000,400);
                cmd(0xc0);                                  // bring cursor to second ROW 
		lcd_display(' ');
                delay_fv(1000,400);
		lcd_display(' ');
                delay_fv(1000,400);
		lcd_display(' ');
                delay_fv(1000,400);
                lcd_display('G');
                delay_fv(1000,400);
                lcd_display('E');
                delay_fv(1000,400);
                lcd_display('M');
                delay_fv(1000,400);
                lcd_display('I');
                delay_fv(1000,400);
                lcd_display('C');
                delay_fv(1000,400);
                lcd_display('A');
                delay_fv(1000,400);
                lcd_display('T');
                delay_fv(1000,400);
                lcd_display('E');
                delay_fv(1000,400);
                lcd_display('S');
                delay_fv(1000,400);
          }
   }
 
void delay_fv(unsigned int x,int y) 	                    // Time delay function in milli seconds
  { 
      unsigned int i,j;
      for(i=0;i<x;i++)
      for(j=0;j<y;j++);
  }
    
void lcd_display(unsigned int x) 	                    // Function to send data to LCD
  {
     IO0CLR|=(RS|RW|EN|LCD);
     IO0SET|=(x<<16);
     IO0SET|=RS;
     IO0CLR|=RW;
     IO0SET|=EN;
     delay_fv(100,10);
     IO0CLR|=EN;
     delay_fv(10,10);
  }
 
void cmd(unsigned char m)                                   // Function to send command to LCD
  {
     IO0CLR|=(RS|RW|EN|LCD);
     IO0SET|=(m<<16);
     IO0CLR|=RS;
     IO0CLR|=RW;
     IO0SET|=EN;
     delay_fv(100,100);
     IO0CLR|=EN;
     delay_fv(100,10);
  }
 
void lcd_ini() 			                            // Funtion to Initialize LCD
    {
      cmd(0X38);        	                            // for using 8-bit 2 row mode and 5x7 Dots of LCD
      cmd(0X0e); 		                            // turn display ON for cursor blinking
      cmd(0X06); 		                            // display ON
      cmd(0X01);   		                            // clear screen
      cmd(0X80); 	                                    // clear screen
  }