plz tell the problem in this lcd program.it is not showing the output

[gopal]

#include<reg51rd2.h>

#define command P1

#define data P2

#define rs P1_0

#define rw P1_1

#define e P1_2

void delay_ms(unsigned int m)

{

int i,j;

for(i=0;i<m;i++);

for(j=0;j<233;j++);

}

void lcd_command(unsigned char value)

{

P1=value;

rs=0;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void lcd_data(unsigned char value)

{

P2=value;

rs=1;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void init()

{

lcd_command(0x38);

lcd_command(0x0e);

lcd_command(0x06);

}

void main()

{

init();

lcd_command(0x80);

lcd_data(‘s’);

delay_ms(10);

lcd_data(‘i’);

delay_ms(10);

lcd_data(‘r’);

delay_ms(10);

}

[GANESHAPERUMAL]

please use this code and reply to this mailid the code is correct or wrong and one more thing pl send correct microcontroller no .ex p89v51rd2 like that . 

 

[email protected]

  

 

if u have any question pl contact me 

  +919940840471  after 6 pm

 

 

 

#include<reg51.h>

#define command P1

#define data P2

sbit rs = P1^0;

sbit rw = P1^1;

sbit e = P1^2;

 

void delay_ms(unsigned int m)

{

int i,j;

for(i=0;i<m;i++);

for(j=0;j<233;j++);

}

void lcd_command(unsigned char value)

{

P1=value;

rs=0;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void lcd_data(unsigned char value)

{

P2=value;

rs=1;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void init()

{

lcd_command(0x38);

lcd_command(0x0e);

lcd_command(0x06);

}

void main()

{

init();

lcd_command(0x80);

lcd_data(‘s’);

delay_ms(10);

lcd_data(‘i’);

delay_ms(10);

lcd_data(‘r’);

delay_ms(10);

}

[gopal]

microcontroller no’s at89c051

[ANJUSHA]

 

 

 

 

 you have taken port1 for passing commands

and port2 for data but for lcd we consider 8/4 data pins …then how can you make use same 8 pins for port1 and for port2..so consider any one port.

 

so take port2/port1.use command 0x01 to clear the display before 0x80 and b/w every command in intializing lcd use delay;

 

 

[manohar]

//use this code and connect the pins correctly data port is P1 here control pins P2.0 P2.1,P.2

 

#include<reg51.h>

#define rs  P2^0     ///edited

#define rw  P2^1   //edited

#define e  P2^2     //edited

 

void delay_ms(unsigned int m)

{

int i,j;

for(i=0;i<m;i++);

for(j=0;j<233;j++);

}

 

void lcd_command(unsigned char value)

{

P1=value;

rs=0;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void lcd_data(unsigned char value)

{

P1=value;///edited

rs=1;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void init()

{

lcd_command(0x38);

lcd_command(0x0e);

lcd_command(0x06);

}

void main()

{

init();

lcd_command(0x80);

lcd_data(‘s’);

delay_ms(10);

lcd_data(‘i’);

delay_ms(10);

lcd_data(‘r’);

delay_ms(10);

}

[Praneeth]

#include<reg51.h>

 

#define rs P1_0

#define rw P1_1

#define e P1_2

void delay_ms(unsigned int m)

{

int i,j;

for(i=0;i<m;i++);

for(j=0;j<233;j++);

}

void lcd_command(unsigned char value)

{

P1=value;

rs=0;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void lcd_data(unsigned char value)

{

P2=value;

rs=1;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void init()

{

lcd_command(0x38);

lcd_command(0x0e);

lcd_command(0x06);

lcd_command(0x01);

 

}

void main()

{

init();

lcd_command(0x80);

lcd_data(‘s’);

delay_ms(10);

lcd_data(‘i’);

delay_ms(10);

lcd_data(‘r’);

delay_ms(10);

}

[AJISH ALFRED]

Hi all,

 

The issues with the LCD are already discussed so many times in this forum. You can search the previous discussions regarding the LCD in this forum and I’m sure that it will help you.

Normally the problems occurs due to:

-wrong hardware connections

-loose contact of any data or control lines

-short circuit of the data or control lines

-port not made as output

-wrong or incomplete initializing commands

-wrong method of activating the enable pin

-insufficient delay 

 

Check all of them.

[ddrk]

just change the this 

 

connect your lcd data pins to P2

 

void lcd_command(unsigned char value)

{

P2=value;

rs=0;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void lcd_data(unsigned char value)

{

P2=value;

rs=1;

rw=0;

e=1;

delay_ms(100);

e=0;

}

 

or 

 

if you use this connect ur lcd data pins to P1

 

void lcd_command(unsigned char value)

{

P1=value;

rs=0;

rw=0;

e=1;

delay_ms(100);

e=0;

}

void lcd_data(unsigned char value)

{

P1=value;

rs=1;

rw=0;

e=1;

delay_ms(100);

e=0;

}

[Author]

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