AVR-Chat

Hi...

I want to do some test with an H-bridge, but I don´t know how to use
the scanf() function for receive characters from the UART.

If anybody have information abuot it, I´ll appreciate any help!!!

Thanks

Somebody emailed:

"I want to do some test with an H-bridge, but I don´t know how to use
the scanf() function for receive characters from the UART.

[..]"

The scanf() function is documented in the book "The C Programming Language"
by Brian W. Kernighan and Dennis M. Ritchie.

Its conversion characters are similar to printf()'s.

An example call with scanf() to take just one character is
char array_to_which_the_character_is_copied[some_length];
scanf("%1c", array_to_which_the_character_is_copied[0]);

> An example call with scanf() to take just one character is
> char array_to_which_the_character_is_copied[some_length];
> scanf("%1c", array_to_which_the_character_is_copied[0]);

Actually, that should be (notice addition of &):

scanf("%1c", &array_to_which_the_character_is_copied[0]);

-- 
Dave Hylands
Vancouver, BC, Canada
http://www.DaveHylands.com/

Dave Hylands correctly pointed out: 

"> An example call with scanf() to take just one character is
> char array_to_which_the_character_is_copied[some_length];
> scanf("%1c", array_to_which_the_character_is_copied[0]);

Actually, that should be (notice addition of &):

scanf("%1c", &array_to_which_the_character_is_copied[0]);
" 

Touché.

Maybe he means setting up the standard input 

FILE* fdevopen  (  int(*    put)(char),  
  int(*    get)(void),  
  int opts     __attribute__((unused)) 
 )  
 

I know you need to use fdevopen  and pass it a int(*    get) function
but I have no idea what that function would look like other than to put
any waiting charactors off the uart. 
I would think it would have to have some time functionality built in
also.

-----Original Message-----
From: AVR-Chat@yahoogroups.com [mailto:AVR-Chat@yahoogroups.com] On
Behalf Of Colin Paul Gloster
Sent: Thursday, June 23, 2005 3:40 AM
To: AVR-Chat@yahoogroups.com
Subject: RE: [AVR-Chat] use of scanf


Somebody emailed:

"I want to do some test with an H-bridge, but I don´t know how to use
the scanf() function for receive characters from the UART.

[..]"

The scanf() function is documented in the book "The C Programming
Language" by Brian W. Kernighan and Dennis M. Ritchie.

Its conversion characters are similar to printf()'s.

An example call with scanf() to take just one character is
char array_to_which_the_character_is_copied[some_length];
scanf("%1c", array_to_which_the_character_is_copied[0]);




 
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