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