[Gumstix-users] How to change console

[John Wilson <john.wilson@er...>]

I am using an Overo Air on a Tobi board and I would like to change the console from UART3 to UART2.  I am running off a micro SD card.

 

Here is what I have done thus far, which doesn't work (I still see console text transmitted over Tobi board pin 22, TX3):

 

1.       Created a patch to change U-Boot to disable Bluetooth and enable UART2, as described by Elvis in http://old.nabble.com/Using-UART-2-on-an-Overo-tt22534595.html#a28479456

2.       Made 2 tweaks in include/configs/omap3_overo.h:

a.       Changed the definition of CONFIG_SYS_NS16550_COM3 to be:

#define CONFIG_SYS_NS16550_COM3      OMAP34XX_UART2

b.      Changed the console line in CONFIG_EXTRA_ENV_SETTINGS to be:

"console=ttyS1,115200n8\0"

 

What else do I need to change?

1.       The "select serial console configuration" in omap3_overo.h includes 2 other definitions: CONFIG_CONS_INDEX and CONFIG_SERIAL3; do I need to tweak these?

2.       I am not very familiar with how U-Boot works.  Is there some default environment or NAND settings or anything else I need to change or get rid of before this will work?  I am running of an SD card.

 

Your help is much appreciated!

 

John

 

John P. Wilson
Engineer
Erigo Technologies LLC
64 Main St./P.O. Box 899
Enfield, NH 03748

P: 603.632.4156
C: 603.252.2087
F: 603.676.0162

 http://www.erigo.com <http://exchweb/bin/redir.asp?URL=http://www.erigo.com>; 

Notice: This email (including attachments) is covered by the Electronic Communications Privacy Act, 18 U.S.C. §§ 2510-2521, is confidential and may be legally privileged. If you are not the intended recipient, you are hereby notified that any retention dissemination, distribution, or copying of this communication is strictly prohibited. Please reply to the sender that you have received the message in error, and then delete it. Thank you.

 

[Gumstix-users] How to change console

[John Wilson <john.wilson@er...>]

I am using an Overo Air on a Tobi board and I would like to change the console from UART3 to UART2.  I am running off a micro SD card.

 

Here is what I have done thus far, which doesn't work (I still see console text transmitted over Tobi board pin 22, TX3):

 

1.       Created a patch to change U-Boot to disable Bluetooth and enable UART2, as described by Elvis in http://old.nabble.com/Using-UART-2-on-an-Overo-tt22534595.html#a28479456

2.       Made 2 tweaks in include/configs/omap3_overo.h:

a.       Changed the definition of CONFIG_SYS_NS16550_COM3 to be:

#define CONFIG_SYS_NS16550_COM3      OMAP34XX_UART2

b.      Changed the console line in CONFIG_EXTRA_ENV_SETTINGS to be:

"console=ttyS1,115200n8\0"

 

What else do I need to change?

1.       The "select serial console configuration" in omap3_overo.h includes 2 other definitions: CONFIG_CONS_INDEX and CONFIG_SERIAL3; do I need to tweak these?

2.       I am not very familiar with how U-Boot works.  Is there some default environment or NAND settings or anything else I need to change or get rid of before this will work?  I am running of an SD card.

 

Your help is much appreciated!

 

John

 

John P. Wilson
Engineer
Erigo Technologies LLC
64 Main St./P.O. Box 899
Enfield, NH 03748

P: 603.632.4156
C: 603.252.2087
F: 603.676.0162

 http://www.erigo.com <http://exchweb/bin/redir.asp?URL=http://www.erigo.com>; 

Notice: This email (including attachments) is covered by the Electronic Communications Privacy Act, 18 U.S.C. §§ 2510-2521, is confidential and may be legally privileged. If you are not the intended recipient, you are hereby notified that any retention dissemination, distribution, or copying of this communication is strictly prohibited. Please reply to the sender that you have received the message in error, and then delete it. Thank you.

 

Re: [Gumstix-users] How to change console

[jpw3 <john.wilson@er...>]

Update from yesterday: I made a stupid mistake copying u-boot.bin onto the
FAT partition of the microSD card, so what I reported yesterday about the
console output still going to ttyS2 was not quite right.  What I am seeing
is the following output on ttyS2 when I turn power on:

        X-Loader 1.4.3 (Feb 16 2010 - 10:36:47)
        Reading boot sector
        Loading u-boot.bin from mmc

The computer doesn't appear to boot any further and there is no activity
that I can see on Tobi pins 27 or 29 (one of which, I think, is the TX for
ttyS1).

Really trying to get this solved - your help is very much appreciated!

John

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Re: [Gumstix-users] How to change console

[Ash Charles <ashcharles@gm...>]

Hi John,

having u-boot.bin on the microSD card should mean that this
u-boot.bin, not anything you've got in NAND get used on boot.
Might it be worth tested one of the known good versions of u-boot to
see if the problem you are running into is to do with some setup on
the Gumstix/u-boot environment variables or if it is instead related
to the modifications you made?

Just a thought.

-Ash

On Thu, May 27, 2010 at 6:43 AM, jpw3 <john.wilson@...> wrote:
>
> Update from yesterday: I made a stupid mistake copying u-boot.bin onto the
> FAT partition of the microSD card, so what I reported yesterday about the
> console output still going to ttyS2 was not quite right.  What I am seeing
> is the following output on ttyS2 when I turn power on:
>
>        X-Loader 1.4.3 (Feb 16 2010 - 10:36:47)
>        Reading boot sector
>        Loading u-boot.bin from mmc
>
> The computer doesn't appear to boot any further and there is no activity
> that I can see on Tobi pins 27 or 29 (one of which, I think, is the TX for
> ttyS1).
>
> Really trying to get this solved - your help is very much appreciated!
>
> John
>
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>
>
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>
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Re: [Gumstix-users] How to change console

[jpw3 <john.wilson@er...>]

Thank you for your thoughts, Ash.  I can put the default/standard u-boot.bin
on the FAT partition and the Overo boots fine.  Also, just as a test, I
tweaked the default omap3_overo.h file (I just changed the command prompt)
just to see if I could make a simple change and have it take effect - and
that custom u-boot.bin also worked fine.  For my most recent changes
(described in the earlier email) I must not be doing something correct to
change the console setting.

Any thoughts very appreciated.

Thanks,

John


Ash Charles wrote:
> 
> 
> having u-boot.bin on the microSD card should mean that this
> u-boot.bin, not anything you've got in NAND get used on boot.
> Might it be worth tested one of the known good versions of u-boot to
> see if the problem you are running into is to do with some setup on
> the Gumstix/u-boot environment variables or if it is instead related
> to the modifications you made?
> 
> 

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Re: [Gumstix-users] How to change console

[Ash Charles <ashcharles@gm...>]

Hi John,

I wonder that u-boot is actually working but you can't see it as you
are no longer connecting the STDIN and STDOUT to ttyS2 (the USB
console port).

-Ash

On Thu, May 27, 2010 at 8:53 AM, jpw3 <john.wilson@...> wrote:
>
> Thank you for your thoughts, Ash.  I can put the default/standard u-boot.bin
> on the FAT partition and the Overo boots fine.  Also, just as a test, I
> tweaked the default omap3_overo.h file (I just changed the command prompt)
> just to see if I could make a simple change and have it take effect - and
> that custom u-boot.bin also worked fine.  For my most recent changes
> (described in the earlier email) I must not be doing something correct to
> change the console setting.
>
> Any thoughts very appreciated.
>
> Thanks,
>
> John
>
>
> Ash Charles wrote:
>>
>>
>> having u-boot.bin on the microSD card should mean that this
>> u-boot.bin, not anything you've got in NAND get used on boot.
>> Might it be worth tested one of the known good versions of u-boot to
>> see if the problem you are running into is to do with some setup on
>> the Gumstix/u-boot environment variables or if it is instead related
>> to the modifications you made?
>>
>>
>
> --
> View this message in context: http://old.nabble.com/How-to-change-console-tp28682927p28696183.html
> Sent from the Gumstix mailing list archive at Nabble.com.
>
>
> ------------------------------------------------------------------------------
>
> _______________________________________________
> gumstix-users mailing list
> gumstix-users@...
> https://lists.sourceforge.net/lists/listinfo/gumstix-users
>

Re: [Gumstix-users] How to change console

[jpw3 <john.wilson@er...>]

Problem is, U-Boot isn't loading Linux - normally I log into the Overo using
SSH over Ethernet.  But, networking never gets setup.  I'm guessing the
kernel isn't actually loading.  Also, I don't see any activity on the Tobi
pins which (I think) should correspond to ttyS1 (which I am trying to
redirect console to) - pins 27 and 29.


Ash Charles wrote:
> 
> 
> I wonder that u-boot is actually working but you can't see it as you
> are no longer connecting the STDIN and STDOUT to ttyS2 (the USB
> console port).
> 
> 

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Re: [Gumstix-users] How to change console

[jpw3 <john.wilson@er...>]

I've had a couple good thoughts from Ash on this issue, but am still in the
dark regarding my problems with reassigning the console in U-Boot.  Insights
from anyone who has tweaked U-Boot would be very appreciated.  Problem
restated below:

I am using an Overo Air on a Tobi board and I would like to change the
console from UART3 to UART2.  I am running off a micro SD card.  Here is
what I have done thus far, which doesn’t work (as explained below):

1. Created a patch to change U-Boot to disable Bluetooth and enable UART2,
as described by Elvis in
http://old.nabble.com/Using-UART-2-on-an-Overo-tt22534595.html#a28479456

2. Made 2 tweaks in U-Boot code, include/configs/omap3_overo.h:

    a. Changed the definition of CONFIG_SYS_NS16550_COM3 to be:

            #define CONFIG_SYS_NS16550_COM3      OMAP34XX_UART2

    b. Changed the console line in CONFIG_EXTRA_ENV_SETTINGS to be:

            "console=ttyS1,115200n8\0"

This isn't quite working.  When I initially boot the Overo, I get the
following brief output on ttyS2, but then the computer doesn't appear to
boot further (there is no activity that I can see on Tobi pins 27 or 29 (one
of which, I think, is the TX for ttyS1), and the Ethernet is never
activated):

        X-Loader 1.4.3 (Feb 16 2010 - 10:36:47)
        Reading boot sector
        Loading u-boot.bin from mmc

What else do I need to change?

1. The “select serial console configuration” in omap3_overo.h includes 2
other definitions: CONFIG_CONS_INDEX and CONFIG_SERIAL3; do I need to tweak
these?

2. Is there some default environment or NAND settings or anything else I
need to change or get rid of before this will work?  I am running of an SD
card.

Any insight is very appreciated!

John

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Re: [Gumstix-users] How to change console

[Dave Hylands <dhylands@gm...>]

Hi John,

> This isn't quite working.  When I initially boot the Overo, I get the
> following brief output on ttyS2, but then the computer doesn't appear to
> boot further (there is no activity that I can see on Tobi pins 27 or 29 (one
> of which, I think, is the TX for ttyS1), and the Ethernet is never
> activated):
>
>        X-Loader 1.4.3 (Feb 16 2010 - 10:36:47)
>        Reading boot sector
>        Loading u-boot.bin from mmc
>
> What else do I need to change?

This brief output is from the loader which runs before u-boot. You
don't see any further output because its all been redirected
elsewhere.

Presumably the rest of your output is going to UART2.

You'll need to check all of the GPIO settings to make sure that the
pins are muxed properly, and make sure that the correct UART is
working.

I'd generally try to do all of this one thing at a time. i.e. leave
the kernel output on UART3 and just move UBOOT to UART2. Once that's
working, then adjust the kernel to use the new UART.

-- 
Dave Hylands
Shuswap, BC, Canada
http://www.DaveHylands.com/