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printing to RS232 , meaning of " \r"

 
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jruibarroso



Joined: 07 Jan 2006
Posts: 64
Location: Braga

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printing to RS232 , meaning of " \r"
PostPosted: Mon Jan 29, 2007 12:09 pm     Reply with quote
When printing to RS232 , what is the meanning of "\r" after text
I know that "\n" is to change line , if others comand exists , which are they ?

Thank you all
cjenkins



Joined: 29 Jan 2007
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PostPosted: Mon Jan 29, 2007 12:16 pm     Reply with quote
This link should help,

http://www.wilsonmar.com/1eschars.htm

In particular, here
http://www.wilsonmar.com/1eschars.htm#endlinez
rwyoung



Joined: 12 Nov 2003
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Re: printing to RS232 , meaning of " \r"
PostPosted: Tue Jan 30, 2007 8:30 am     Reply with quote
jruibarroso wrote:
When printing to RS232 , what is the meanning of "\r" after text
I know that "\n" is to change line , if others comand exists , which are they ?

Thank you all


'\n' is "new line"
'\r' is "carriage return"

Some C compilers will automatically translate the '\n' into "\r\n" (or "\n\r") which is why when you use Microsoft C or Borland C on a PC to write to the console, you use '\n' by itself.

Some terminal programs have a configuration inside to make the conversion for you so when it sees '\n' come in, it adds the carriage return too.

Another usefull escape character is '\t' for horizontal TAB. Search Google for an ASCII code table and also read cjenkins' links.
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