busybox output to lcd display

[Denys Vlasenko]

On Saturday 22 November 2008 19:56, Sudipta GHOSH wrote:
> What I am missing or any info you want?
> 
> In my development board, I use uboot as boot loader.
>  busybox files are in flash.
> when I boot , I can see the boot logo (peguin) in the lcd display and
> all "printk" output.
> 
> But I am unable to see the busybox in the lcd display.

This is the confusing part. It's unclear what do you mean by
"unable to see the busybox [output]". There is no "busybox"
output per se, you can only see some output if some program
(be it busybox applet or not) outputs something.

So, you need to tell us _which_ busybox applet do you run
and see its output on the wrong device, and from where and how
(what command line parameters etc) do you run it.

> busybox prompt and all output from busybox is going to the serial port.
> Like  if I do ls, then I see the output of "ls" in my serial port
> (teraterm/hyper terminal).

I assume this actually means "shell prompt and everything
I type in is seen on serial console".

> How I can see busybox prompt and all output to my lcd display.

By finding out where shell (which is most likely a busybox applet)
is started, and what tty is given to it. Then fix tty name there.

> I use console=tty0 in the bootargs.

I assume you mean "I have 'console=tty0' on kernel command line".
This merely makes your /dev/console be the same as /dev/tty0
(as opposed to, say, serial console /dev/ttyS0).

If your shell is given different tty to be on, kernel parameter
does not matter.

For example, if shell is started by init using /dev/inittab
line like this:

ttyS0::respawn:/bin/ash

it will be on ttyS0.
--
vda