[U-Boot-Users] RE: LCD on OMAP2430

Goswami Jigisha-ejg014 ejg014 at motorola.com
Thu Mar 30 18:49:17 CEST 2006

I got the U-Boot prompt on my serial console now. The problem was with
setting of one of the display clocks. 
However, I still get stdout: serial. I am trying to setup JTAG debugger
to debug the U-Boot and see what is 
happening. Meanwhile, I looked at the console.c file and it seems like
the overwrite_console() function must 
be returning 0 (because I have define CONFIG_CONSOLE_IS_IN_ENV ). But in
the console_init_r() function, my 
lcd device is not found probably so it is using serial as stdout. Does
it mean my device is not being 
registered with U-Boot framebuffer? I am using the common lcd.c and
lcd.h files for common functions like 
registering the device etc. and am defining my board specific routines
in a different file. Any help is greatly 


-----Original Message-----
From: wd at denx.de [mailto:wd at denx.de] 
Sent: Wednesday, March 29, 2006 3:21 PM
To: Goswami Jigisha-ejg014
Cc: Woodruff, Richard; u-boot-users at lists.sourceforge.net
Subject: Re: [U-Boot-Users] RE: LCD on OMAP2430 

In message <4F9B2712E6C4C74582548D2260EE1D2D9E24B3 at ct11exm64.ds.mot.com>
you wrote:
> I realized about the Bad CRC warning afterwards. Anyway, the U-Boot 
> hangs

Are you sure that it hangs? Do you have the  LCD  display  connected?
What do you see on it.

> after that message and I do not see stdout, stdin and stderr that 
> should come up on the console. How can I change that to my target LCD?

> I know that stdin cannot be LCD, it has to be UART, But how can I 
> change stdout to LCD? Can any one help?

Read the code. If LCD is enabled, both stdout and stderr will  go  to
the  LCD by default - which is probably why you don't see anything so
you think the board is hanging while it's running fine.

Try typing a few times ENTER, followed by a  "setenv  stdout  serial"
(even if you don't see any echo for your typing).

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
Anyone who knows history, particularly the history of Europe, will, I
think, recognize that the domination of education or of government by
any one particular religious faith is never a happy  arrangement  for
the people.                                       - Eleanor Roosevelt

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