/*********************************/
/* program: Hello!World!         */
/*  by Jack Changfan             */
/*     Jan 8 '97                 */
/*********************************/

#progma SMALL db CODE
#include<reg51.h>

sfr Data = 0x90;  /* Port 1: Data in/out */
sbit RS  = P3^0;  /* Register selection: 1=data; 0=instruction */
sbit RW  = P3^1;  /* 1=Read, 0=Write */
sbit E   = P3^2;  /* Enable */

void delay(int t)
{
  int i,j;
  for (i=0; i<t i++)
    for (j=0; j<t; j++);
}

void Init_Left()
{
  RS=0;
  RW=0;
 
  E=1;
  Data = 0x38;
  delay(100);
  E=0;
  delay(100);

  E=1;
  Data = 0x38;
  delay(100);
  E=0;
  delay(100);

  E=1;
  Data = 0x38;
  delay(100);
  E=0;
  delay(100);

  E=1;
  Data = 0x0f;
  delay(100);
  E=0;
  delay(100);

  E=1;
  Data = 0x01;
  delay(100);
  E=0;
  delay(100);
 
  E=1;
  Data = 0x06;
  delay(100);
  E=0;
  delay(100);

}

void Init_Right()
{
  RS=0;
  Data = 0xC0;
  E=1;
  delay(100);
  E=0;
  RS=1;
}

void Send(char ch)
{
  /* send data to display */
  RS=1;
  E=1;
  Data=ch;
  delay(100);
  E=0;
}

void main()
{
  char left[6]="Hello!", right[6]="World!";
  int i;

  Init_Left();
  for (i=0; i<6; i++) Send(left[i]);
  Init_Right();
  for (i=0; i<6; i++) Send(right[i]);
}