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source code:

 //-----data display in LCD screen-----//
#include<reg51.h>
sfr ldata=0x90;
sbit rs=P2^0;
sbit rw=P2^1;
sbit en=P2^2;
sbit sw1=P3^0;
sbit sw2=P3^1;
sbit sw3=P3^2;
//sbit sw4=P3^3;
void lcdcmd(unsigned char valude);
void lcddata(unsigned char value);
void delay(unsigned int itime);
void main()
{ unsigned int i;
 unsigned char x[30]={"THATI ANAND ELECTRONICS DEPT."};
 unsigned char x1[30]={" HELLO WORLD  WELCOME ECE"};
  unsigned char x2[30]={"HELLO EINSTEIN HOW ARE YOU SIR"};
  unsigned char c;
 ldata=0x00;
 rs=0;
 rw=0;
 en=0;
 sw1=1;
 sw2=1;
 sw3=1;
 //sw4=1;
while(1)
{
 lcdcmd(0x38);
 delay(25);
 lcdcmd(0x0E);
 delay(25);
 lcdcmd(0x01);
 delay(25);
 lcdcmd(0x06);
 delay(25);
 lcdcmd(0x81);
 delay(25);
 if(sw1==0)
   {
    for(i=0;i<12;i++)
      {
        c=x[i];
        lcddata(c);
         delay(25);
       }
     lcdcmd(0x0C0);
      delay(25);
     for(i=12;i<30;i++)
      {
       c=x[i];
    lcddata(c);
    delay(25);
    }
   }
if(sw2==0)
    {
for(i=0;i<12;i++)
     {
      c=x1[i];
      lcddata(c);
       delay(25);
     }
    lcdcmd(0x0C0);
    delay(25);
    for(i=12;i<30;i++)
      {
       c=x1[i];
       lcddata(c);
       delay(25);
    }
}
if(sw3==0)
   {
    for(i=0;i<15;i++)
      {
        c=x2[i];
        lcddata(c);
         delay(25);
       }
     lcdcmd(0x0C0);
      delay(25);
     for(i=15;i<30;i++)
      {
       c=x2[i];
    lcddata(c);
    delay(25);
    }
   }

 }
 }
 void lcdcmd(unsigned char value)
 {
  ldata=value;
  rs=0;
  rw=0;
  en=1;
  delay(1);
  en=0;
  return;
  }
 void lcddata(unsigned char value)
  {
   ldata=value;
   rs=1;
   rw=0;
   en=1;
   delay(1);
   en=0;
   return;
   }
   void delay(unsigned int itime)
   {
    unsigned int i,j;
for(i=0;i<itime;i++)
for(j=0;j<1275;j++);
}

Reviewed by haru on July 03, 2012 Rating: 5

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