[U-Boot-Users] Up-arrow and Down-arrow related Query
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
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
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@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."
participants (2)
-
Kamesh K S -
Wolfgang Denk