16X2 LCD interface with AT89S52 problem

[prajwal]

hello friends,

 

I have interfaced LCD 16X2 with AT89S52 (11.0592MHz crystal)

 

The code goes like this,

 

#include<reg52.h>
#define ldata P3
sbit rs=P2^0;
sbit rw=P2^1;
sbit en=P2^2;
sbit busy=P3^7;
void lcdcmd(unsigned char value);
void lcddata(unsigned char value);
void MSDelay(unsigned int itime);
void lcdready();
void main()
{
lcdcmd(0x38);
MSDelay(250);
lcdcmd(0x0E);
MSDelay(250);
lcdcmd(0x01);
MSDelay(250);
lcdcmd(0x06);
MSDelay(250);
lcdcmd(0x86);
MSDelay(250);
lcddata(‘M’);
lcddata(‘D’);
lcddata(‘E’);
}

void lcdcmd(unsigned char value)
{
void lcdready();
ldata=value;
rs=0;
rw=0;
en=1;
MSDelay(1);
en=0;
return;
}

void lcddata(unsigned char value)
{
void lcdready();
ldata=value;
rs=1;
rw=0;
en=1;
MSDelay(1);
en=0;
return;
}
void lcdready()
{
busy=1;
rs=0;
rw=1;
while(busy==1)
{
en=0;
MSDelay(1);
en=1;
}
return;
}

void MSDelay(unsigned int itime)
{
unsigned int i,j;
for(i=0;i<itime;i++)
for(j=0;j<1275;j++);
}

 

The problem is nothing is being displayed on LCD. Jus the backlight will be on.

 I have connected data pins of LCD to port P3 and control pins rs,rw&en to  rs=P2^0; rw=P2^1;en=P2^2;….

 

Pls help……….. Thanks in advance

[nidhin.k]

hai prajwal…

 

 

 

ur code is working….

 

reduse delay…

 

 

void main()

{

lcdcmd(0x38);

MSDelay(20);

lcdcmd(0x0E);

MSDelay(20);

lcdcmd(0x01);

MSDelay(20);

lcdcmd(0x06);

MSDelay(20);

lcdcmd(0x86);

MSDelay(20);

lcddata(‘M’);

MSDelay(20);

lcddata(‘D’);

MSDelay(20);

lcddata(‘E’);

MSDelay(20);

 

}

 

 

 

i checked it in proteus…. it’s working…

 

all the best

[prajwal]

Yeah it is working with me too There was some loose connection in hardware now its working fine.

Thanks for your reply and concern

[RUBEN KURIAKOSE]

Can you show me the circuit diagram used. I come with a similar problem.

[I am working as an R&D Er. in SparkLab. and interested to innovative research .]

check your circuit conection………..

[Author]

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