//Displaying "YES" on LCD using MDE8051 Trainer
//Tested by Mazidi 
//Modified from Example 12-1 in chapter 12 of the "8051 Microcontroller" textbook by Mazidis & McKinlay 
//P1.7-P1.0 to data line of LCD, P2.0=RS, P2.1=R/W, and P2.2=E. 
#include <reg51.h>
sfr ldata = 0x90;			
sbit rs = P2^0;
sbit rw = P2^1;
sbit en = P2^2;
void lcdcmd(unsigned char);
void lcddata(unsigned char);
void MSDelay(unsigned int);
void main()
  {
    MSDelay(250);
    lcdcmd(0x38);
    MSDelay(250);
    lcdcmd(0x0E);
    MSDelay(250);
    lcdcmd(0x01);
    MSDelay(250);
    lcdcmd(0x06);
    MSDelay(250);
    lcdcmd(0x86);			
    MSDelay(250);
    lcddata('Y');       
    MSDelay(250);
    lcddata('E');       
    MSDelay(250);
    lcddata('S'); 
    for(;;);       //do it once and stay here       
  }
void lcdcmd(unsigned char value)
  {
    ldata = value;      		
    rs = 0;
    rw = 0;
    en = 1;             		
    MSDelay(1);
    en = 0;
    return;
  }
void lcddata(unsigned char value)
  {
    ldata = value;   		
    rs = 1;
    rw = 0;
    en = 1;           		
    MSDelay(1);
    en = 0;
    return;
  }
void MSDelay(unsigned int itime)
  {
    unsigned int i, j;
    for(i=0;i<itime;i++)           //Modify this this delay to see
      for(j=0;j<127;j++);         //the lowest delay acceptable for LCD
  }