AVR-Chat

Dear All
   
  I have a problem about characteristic LCD.
   
  When I use <lcd.h> and simulate my circuit in Proteus program, only odd (or even) characters shown correctly and other characters shown wrong. Also first character in each word always doesn’t show.
  For example if I want to show “document” LCD shows “ ofufeft” in Proteus simulation.
  My LCD is 20x4 and My AVR IC is Atmega  32 , version of my Code Vision is 1.23.8c Standard and version of my Proteus is 6.9 (full).
   
  I use these functions:
   
  #include <mega32.h>
   
  #asm
     .equ __lcd_port=0x18
  #endasm
   
  #include <lcd.h>
   
  void main(void)
  {
   
  lcd_init(20);
  lcd_clear();
  while (1)
        {  
       lcd_gotoxy(0,0);
       lcd_putsf("document");
        
        };
  }
   
  I changed LCD port in AVR IC but problem still exists.
  How I can correct my program? Is it required other adjustment? Is it possible that Proteus is responsible my problem?
   
  Regards
   

       
---------------------------------
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[Non-text portions of this message have been removed]

Hi Omid,

What LCD controller chip does your LCD use? The lcd.h files I've seen are 
for the HD44780.  It REALLY helps to have the documentation for the LCD 
controller chip you have, though, as I've found that some of the other 
devices are "nearly compatible" with the HD44780 but not quite.

I have the data sheet for the HD44780 controller on my website:

http://www.qsl.net/w9sz/files/PDFs/HD44780.pdf

Zack


On Wed, 14 Nov 2007, Omid Station wrote:

> Dear All
>
>  I have a problem about characteristic LCD.
>
>  When I use <lcd.h> and simulate my circuit in Proteus program, only odd (or even) characters shown correctly and other characters shown wrong. Also first character in each word always doesn’t show.
>  For example if I want to show “document” LCD shows “ ofufeft” in Proteus simulation.
>  My LCD is 20x4 and My AVR IC is Atmega  32 , version of my Code Vision is 1.23.8c Standard and version of my Proteus is 6.9 (full).
>
>  I use these functions:
>
>  #include <mega32.h>
>
>  #asm
>     .equ __lcd_port=0x18
>  #endasm
>
>  #include <lcd.h>
>
>  void main(void)
>  {
>
>  lcd_init(20);
>  lcd_clear();
>  while (1)
>        {
>       lcd_gotoxy(0,0);
>       lcd_putsf("document");
>
>        };
>  }
>
>  I changed LCD port in AVR IC but problem still exists.
>  How I can correct my program? Is it required other adjustment? Is it possible that Proteus is responsible my problem?
>
>  Regards
>
>
>
>

[Non-text portions of this message have been removed]