Google is your friend...http://www.8051projects.net/lofiversion/t50417/16x2-lcd-16f877a.html

 

please i need to solve this problem if you can help me or tell from where i have to start

 

please i need to solve this problem if you can help me or tell from where i have to start

Did you click the blue & underlined text from my previous post? This is a link. When clicked it will take you to a website that I found, in which, it describes connecting a LCD to a PIC16f877A...

 

Hmmm... looks like you already found that site, considering you ripped the information from there and posted it here.


Here are some websites that deal with how to actually learn how to use the LCD:
http://www.geocities.com/dinceraydin/lcd/commands.htm

http://en.wikipedia.org/wiki/Hitachi_HD44780_LCD_controller

http://www.electronicworkspace.com/2011/09/16x2-lcd-with-16f877a.html

http://www.egr.msu.edu/~ece480fs10-01/wp-content/uploads/2010/11/Keith_Application_Note-1.pdf

http://www.sxlist.com/techref/io/lcd/44780.htm

 

also its not work

 

http://www.8051projects.net/lofivers...d-16f877a.html
i do exactly the same connection here and the same code but stil not working
?????????

 

http://www.8051projects.net/lofivers...d-16f877a.html
i do exactly the same connection here and the same code but stil not working
?????????

That's because you don't have the library the main program is referencing.

 

as i read i have to change the variable resistor until i see the lcd working is it right?

 

so , how i will have this library?

 

as i read i have to change the variable resistor until i see the lcd working is it right?

That changes the contrast to the LCD...

 

so , how i will have this library?

Either find one that works, or write your own...It's probably easier to write your own...

 

so , how i will have this library?

 

so , how i will have this library?

See post # 31

 

i dont know how to write it

 

tell me please this library for what?

 

tell me please this library for what?

To interface to the LCD

 

This is a nice write up on it...

 

but i am using mikroC compiler

 

can you please check this one
http://tecnobits.com.ar/microcontrollers/interface-of-lcd-with-pic-using-mikroc-builtin-library/

 

but i am using mikroC compiler

It's the same interface. The way you define and interface to it may be slightly different, (HiTech vs. mikroC), but the same technique applies. This tutorial goes step-by-step into what you need to do...