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

[Kamesh K S]

Hi All,
I'm using u-boot for our custom board.
We are customizing the Cmd Line interface of U-Boot
to suit our needs.

The Up-Arrow & Down-Arrow keys don't function the way
they do in Bash Shell prompt.

The Up-Arrow takes the cursor up the screen thru the previous
prompt lines. Where is this Up-Arrow functionality defined ?

Same with Down-Arrow - It takes the cursor down till u hit the
bottom of the screen ( as in a file ).

I chkd the readline() function in common/main.c, but that does
not take care of Up & Down arrows in Switch - Case stmts.

I also chkd some environment related files too, but no help.

I need to know where the Up and Down arrow key press
functionalities are defined.

Please Help !!

Rgds
Kamesh

[Martijn de Gouw]

Hi,

Post by Kamesh K S
I need to know where the Up and Down arrow key press
functionalities are defined.

Check common/main.c
See also this patch
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/21829/match=hist
ory

Regards,
Martijn de Gouw

[Timur Tabi]

Post by Martijn de Gouw
Hi,

Post by Kamesh K S
I need to know where the Up and Down arrow key press
functionalities are defined.

Check common/main.c
See also this patch
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/21829/match=hist
ory

Why wasn't this patch incorporated into U-Boot?

[Wolfgang Denk]

Post by Kamesh K S
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...

Post by Kamesh K S
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.

Post by Kamesh K S
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.

Post by Kamesh K S
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.

Post by Kamesh K S
I need to know where the Up and Down arrow key press
functionalities are defined.

You repeat yourself.

Best regards,

Wolfgang Denk

[Kamesh K S]

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

Post by Wolfgang Denk

Post by Kamesh K S
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...

Post by Kamesh K S
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.

Post by Kamesh K S
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.

Post by Kamesh K S
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.

Post by Kamesh K S
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: [phone] Fax: [phone] Email: wd at denx.de
Quote from a recent meeting: "We are going to continue having these
meetings everyday until I find out why no work is getting done."

[Wolfgang Denk]

Post by Timur Tabi

Post by Martijn de Gouw
See also this patch
http://article.gmane.org/gmane.comp.boot-loaders.u-boot/21829/match=hist
ory

Why wasn't this patch incorporated into U-Boot?

Because a different implementation was chosen?

Best regards,

Wolfgang Denk