[U-Boot-Users] Up-arrow and Down-arrow related Query

[Kamesh K S <kamesh@signal-networks.com>]

Hi ALL, 

I went thru' the latest 1.1.6 code and found that 
History command and various other command line 
editing options can be enabled using the 
CONFIG_CMDLINE_EDITING macro. But it does not 
support command completion. 

        The CONFIG_AUTO_COMPLETE macro allows command 
completion but that does not work in tandem with History 
and other cmd line editing options(only very few cmd line 
edit option work). 

readline() has few cmd edit options along with command 
completion. 

cread_line() has many cmdline editing features available, 
but command completion option is not supported. 

How do we make both of them work in in u-boot environment 
togather ? 

Or am I missing anything ? 

Thnx in Advance 
Kamesh 




On Fri, 2007-01-12 at 16:52, Wolfgang Denk wrote:
> In message <1168625193.1678.23.camel@Kamesh> you wrote:
> >
> >        I'm using u-boot for our custom board.
> > We are customizing the Cmd Line interface of U-Boot
> > to suit our needs.
> 
> Start trying to understand what's already present...
> 
> > The Up-Arrow & Down-Arrow keys don't function the way
> > they do in Bash Shell prompt. 
> 
> Umm... it seems you are somewhat  confused  about  functions  of  the
> terminal  emulation  running  on  your  host  computer  and the imput
> processing in U-Boot.
> 
> In the standard configuration, there is no such thing  as  "Up-Arrow"
> or "Down-Arrow" keys - U-Boot is reading a character stream, and tere
> is no such characters in the usedC (= ASCII) character set.
> 
> However, you can enable command completion, commandline editiong  and
> history  functions  by  enabling  these  in your board configuration.
> Then, and  only  then,  will  U-Boot  respond  to  certain  character
> sequences.
> 
> > The Up-Arrow takes the cursor up the screen thru the previous 
> > prompt lines. Where is this Up-Arrow functionality defined ?
> 
> In the terminal emulation program running on your host system. U-Boot
> is just echoing the characters in your input.
> 
> > I chkd the readline() function in common/main.c, but that does 
> > not take care of Up & Down arrows in Switch - Case stmts.
> 
> It does not ven know that such things might exist.
> 
> > I need to know where the Up and Down arrow key press
> > functionalities are defined.    
> 
> You repeat yourself.
> 
> Best regards,
> 
> Wolfgang Denk
> 
> -- 
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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>