AVR-Chat

Thanks for ur reply. Now i want to know that what is the fuse setting for atmega32 for uart communication? bcoz my program is working but i am getting only 100 baudrate.
 
R.P.Modi


----- Original Message ----
From: David Kelly <dkelly@hiwaay.net>
To: AVR-Chat@yahoogroups.com
Sent: Friday, 14 March, 2008 3:53:55 AM
Subject: Re: [AVR-Chat] Serial communication problem in atmega32

                
On Mar 14, 2008, at 4:22 AM, eko setiawan wrote:

> what kind of program which U use to write uC?
> try this:
> I use CV AVR. that program have provide the fitur for serial comm  
> easily.
> U can use code wizard fitur in there.
> U only adjust the baud rate.
> the command for display is "printf", like command in c language.

"printf" is not a C command, it is a routine like any other,  
contained in a library, described in header file(s).

printf() is usually a very large consumer of CPU resources as it must  
include a runtime interpreter to read the format string, then it must  
include binary to ASCII converters for all supported output formats  
whether you use them or not.

In general only very large projects, students or other novices, can  
afford the cost of printf() in an embedded environment.

What most of us do is write routines that do just what we want and  
nothing else. Maybe a putchar() to write individual bytes out the  
serial port. Then puts() to repeatedly call putchar() writing each  
character of a string. Then i8puts() to convert an 8 bit integer and  
write to the serial port in ASCII, and/or u8puts(), or u16puts(), and/ 
or i16puts(), ... And often I add crlf() for line endings.

void crlf(void)
{
	putchar(0x0d) ;
	putchar(0x0a) ;
}

and use something like this:

	puts("The answer is ");
	i16puts(sum) ;
	crlf();

rather than

	printf("The answer is %i\n", sum);

--
David Kelly N4HHE, dkelly@HiWAAY. net
============ ========= ========= ========= ========= ========= ========= ======
Whom computers would destroy, they must first drive mad.


    
          			
<!--