tamamontu <pkm_munot1@n_o_s_p_a_m.hotmail.com>
  wibbled on Wednesday 10 February 2010 05:15

> Hi, I am trying to redirect kernel message to serial console.
> 
> I am trying to modify LCD device driver for cirrus EP9307 board. We are
> using 2.6.8.1 kernel and reboot as bootloader.
> 
> I have enabled support for serial console in kernel config using
> menuconfig. The default console is set to tty0 which is lcd in our case.
> How can i change this to ttys0(uart1).
> 
> On net there is some information about changing this using kernel
> parameters.
> 
> In our system reboot unzips the kernel image and loads it.

I'll also add - make sure console over serial is enabled in your kernel 
build.

tamamontu <pkm_munot1@n_o_s_p_a_m.hotmail.com>
  wibbled on Wednesday 10 February 2010 05:15

> Hi, I am trying to redirect kernel message to serial console.
> 
> I am trying to modify LCD device driver for cirrus EP9307 board. We are
> using 2.6.8.1 kernel and reboot as bootloader.
> 
> I have enabled support for serial console in kernel config using
> menuconfig. The default console is set to tty0 which is lcd in our case.
> How can i change this to ttys0(uart1).
> 
> On net there is some information about changing this using kernel
> parameters.

You'll need to append this to the boot loader line:

console=ttyS0,9600

or variations on that (9600 is the baud rate and ttyS0 is the device name - 
this could be something else on your setup)

More info here:

http://www.vanemery.com/Linux/Serial/serial-console.html

-- 
Tim Watts

Managers, politicians and environmentalists: Nature's carbon buffer.

Hi, I am trying to redirect kernel message to serial console. 

I am trying to modify LCD device driver for cirrus EP9307 board. We are
using 2.6.8.1 kernel and reboot as bootloader. 

I have enabled support for serial console in kernel config using
menuconfig. The default console is set to tty0 which is lcd in our case.
How can i change this to ttys0(uart1).

On net there is some information about changing this using kernel
parameters. 

In our system reboot unzips the kernel image and loads it. 

----------------------------------------------------------------------------------------------------------------------------------
+
Ethernet eth0: MAC address 00:00:00:00:68:34
IP: 192.168.254.10
0/255.255.255.0, Gateway: 192.168.254.254
Default server: 192.168.254.254, DNS server IP: 192.168.254.254

RedBoot(tm) bootstrap and debug environment [ROMRAM]
Non-certified release, version v2_0 - built 10:15:31, Feb 5 2010

Platform: Cirrus Logic EDB9307 Board (ARM920T) Rev A
Copyright (C) 2000, 2001, 2002, Red Hat, Inc.

RAM: 0x00000000-0x04000000, 0x00041f68-0x03fbd000 available
FLASH: 0x60000000 - 0x62000000, 128 blocks of 0x00040000 bytes each.
== Executing boot script in 1.000 seconds - enter ^C to abort

RedBoot> fis load ramdisk.gz

RedBoot> fis load zImage

RedBoot> exec -r 0x800000 -s 0xC00000
Using base address 0x0008
0000 and length 0x0012f580

Uncompressing Linux.........................................
........................................... done, booting the kern
el.



Please press Enter to activate this console.

----------------------------------------------------------------------------------------------------------------------------------


cheers	   
					
---------------------------------------		
Posted through http://www.EmbeddedRelated.com