at89c52 and lcd interfacing

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gnoble29

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i have an at89c52 and a 16*2 lcd display. how i connect my lcd to 89c52 to disply the message welcome...


if any one know the source code,plz post...



thanks in advance
 

Code: 
#include <reg52.h>
#include <math.h>
void lcdcmd (unsigned char);
void lcddata (unsigned char);
void msdelay (unsigned int);
void LCD_sendstring(unsigned char * );

////////////////////////////////////// 
sfr ldata =0x90;
sbit rs=P3^7;
sbit rw=P3^6;
sbit en=P3^5;
sbit g=P2^7;
/////////////////////////////


void main(void)
{
lcdcmd (0x3;
msdelay (100);
lcdcmd (0x0C);
msdelay (100);
LCD_sendstring("16x2 LCD");
msdelay(1000)



lcdcmd (0x01);
msdelay(5);

}

void lcdcmd (unsigned char value)
{ 
ldata=value;
rs=0;
rw=0;
en=1;
msdelay (10);
en=0;
}

void lcddata (unsigned char value)
{
ldata=value;
rs=1;
rw=0;
en=1;
msdelay (10);
en=0; 
}


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


void LCD_sendstring(unsigned char *value)
{
while(*value) 
lcddata(*value++); 
}
 
when compiling on keil i have got the following error messages..what will i do??
 

when compiling on keil i have got the following error messages..what will i do??
Click to expand...


This error is because you copied the code to an asm file( i.e. *.a51). Make a new file with extension *.C then copy the code there. Then it would work perfectly.
 
ajishgopalr said:
This error is because you copied the code to an asm file( i.e. *.a51). Make a new file with extension *.C then copy the code there. Then it would work perfectly.
Click to expand...

thanks lot:-D

---------- Post added at 16:58 ---------- Previous post was at 16:53 ----------

which model of lcd display should i select in proteus for simulating the above code....i have proteus6 professional...it provides varity of 16*2 lcd display
 

See if your hardware is connected to as in the program to get output....

modify the 1st line after main function lcdcmd (0x3;
as lcdcmd(0x30);
 

to which pin of 8052 should i connect db0.db1........db7 pins of lcd
 

Go for

LM016L 16x2

---------- Post added at 21:35 ---------- Previous post was at 21:34 ----------
to which pin of 8052 should i connect db0.db1........db7 pins of lcd
Click to expand...

Connect to any port.

---------- Post added at 21:36 ---------- Previous post was at 21:35 ----------

I have highlighted the LCD in proteus
 
Last edited by a moderator:
thanks a lot...i succeded in lcd display.it is my first proteus simulation..thanks
 



---------- Post added at 17:32 ---------- Previous post was at 17:29 ----------

In this program,the display will blinks after some delay....what modifiacation should made to make the output displas the same thing at everytime..that means no blinks....
 

yes..i need the display premanently still...
 

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