[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;

}

[ddrk]

• 89c51 and 89s51 difference……
•  
• In S series  the main difference is that you can program the “S” verison through ISP (in application) or using very simple programmers, while the “C” version still needs “full” parallel programmer . (ISP stands for In System Programming)
•  

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