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UBoot's terminal server

U-Boot-Users vvj 3 participants 7 messages Apr 23, 2007 – Apr 24, 2007

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vvj

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#0 lore raw

From UBoot manual:
"...There are several ways to access the serial console port on your target system, such as using a terminal server, but the most common way is to attach it to a serial port on your host. Additionally, you will need a terminal emulation program on your host system, such as cu or kermit. .."

My question is:
How can I use Uboot shell wo RS232 COMport connection - are there ways to get rsh (telnet or whatever) server working on UBoot?
Yes, I'm using RS232 currently, but what if I want to use UBoot shell through ethernet, how could I configure UBoot to make it setup "terminal server"?

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#1 lore raw
Quoted 6 lines · vvj
Quoted 1 line

From UBoot manual:

"...There are several ways to access the serial console port on your target system, such as using a terminal server, but the most common way is to attach it to a serial port on your host. Additionally, you will need a terminal emulation program on your host system, such as cu or kermit. .."

Quoted 6 lines

My question is:
How can I use Uboot shell wo RS232 COMport connection - are there ways to get rsh (telnet or whatever) server working on UBoot?
Yes, I'm using RS232 currently, but what if I want to use UBoot shell through ethernet, how could I configure UBoot to make it setup "terminal server"?

It's possible to route console over the network interface via NetConsole. Read about it in doc/README.NetConsole.

regards,
Ben

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#2 lore raw

Thanks Ben,
I tried this way - it does not work.

First - UBoot issue:
when I enter "setenv stdout nc; setenv stdin nc'", the env var stays the same - I can see it from "printenv".
I changed sources - set stdout and stdin to nc by default and erased env var. Loading default values did not help:
still I see
...

In:    serial
Out:   serial
Err:   serial
Net:   Using MAC Address 12:34:56:78:9A:BD
Hit any key to stop autoboot:  0

...
I searched source code for 6666 or 1a0a (1A0A) - default port - nothing found, except ncb.c from tools folder (linux app)

Second - my Fedora5 issue:
It does not understand "nc -u -l -p 6666 < /dev/null &" - shows help topic on that

So I really doubt this could work in described way.

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#3 lore raw
Quoted 2 lines · In message <[email protected]> you wrote:

I tried this way - it does not work.

Did you check if the required features are enabled in your board configuration?

Quoted 2 lines

I searched source code for 6666 or 1a0a (1A0A) - default port - nothing found, except ncb.c from tools folder (linux app)

You did not search thoroughly; I find more that 60 files:

	-> find * -type f | xargs egrep 6666 | wc -l
	61

One of them is - big surprise - drivers/netconsole.c

Quoted 3 lines

Second - my Fedora5 issue:
It does not understand "nc -u -l -p 6666 < /dev/null &" - shows help topic on that

Seems you did not read the documentation either. Please reread the doc/README.NetConsole file, now from beginning to end, and pay special attention when it talsk about "some distributives (Fedora Core 5 at least)" - this could be important to your problem.

Quoted 1 line

So I really doubt this could work in described way.

It can. You just have to do it right.

Best regards,

Wolfgang Denk

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#6 lore raw
In reply to vvj
Quoted 10 lines · vvj

Thanks Ben,
I tried this way - it does not work.

First - UBoot issue:
when I enter "setenv stdout nc; setenv stdin nc'", the env var stays the same - I can see it from "printenv".
I changed sources - set stdout and stdin to nc by default and erased env var. Loading default values did not help:
still I see
...

Quoted 9 lines
In:    serial
Out:   serial
Err:   serial
Net:   Using MAC Address 12:34:56:78:9A:BD
Hit any key to stop autoboot:  0

...
I searched source code for 6666 or 1a0a (1A0A) - default port - nothing found, except ncb.c from tools folder (linux app)

You need to set CONFIG_NETCONSOLE in your board .h file and recompile U-boot. This will let you redirect the streams.

Quoted 3 lines

Second - my Fedora5 issue:
It does not understand "nc -u -l -p 6666 < /dev/null &" - shows help topic on that

There was recently a patch to the README.NetConsole file about using nc under Fedora Core 5. I believe you should try it without "-p". I'm a Debian/Ubuntu user, so can't really speak from experience.

regards,
Ben

author
#4 lore raw
In reply to Wolfgang Denk

Dear Wolfgang,

I searched through latest (Uboot 1.2) doc folder, but did not find kind of text you mentioned:
"...some distributives (Fedora Core 5 at least)..."

Also I recompiled Uboot to support NetConsole: I defined CONFIG_NETCONSOLE
CFG_CMD_NET (in CONFIG_COMMANDS, wo it I had compiling errors) CONFIG_NET_MULTI (wo it I had compiling errors)

The problem is that when I define CONFIG_NET_MULTI, Uboot does not initialize network at startup - I cant use tftp or any network related. When I "run nc" - serial COM port shell dies, but do not see anything on host (I tried SuSe now)

What are the criteria which defines whether board is capable of netconsole or not?
What means CONFIG_NET_MULTI and why network stuff - eth_init(bd_t) - does not launch when it is defined?

I have UBoot 1.1.2 from STlinux.com and 7100mboard

Best regards,

Viktor Volke

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#5 lore raw
Quoted 4 lines · In message <[email protected]> you wrote:

I searched through latest (Uboot 1.2) doc folder, but did not find kind of text you mentioned:
"...some distributives (Fedora Core 5 at least)..."

U-Boot 1.2.0 is not latest, it is actually quite old. Please use current code (top of tree from git repository).

Quoted 1 line

I have UBoot 1.1.2 from STlinux.com and 7100mboard

Please contact their support group then. I don't know which changes they might have made.

Best regards,

Wolfgang Denk

Signature · 5 lines
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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