AW: [microblaze-uclinux] Booting without terminal

["Raul Camaras" <raul.camaras@xxxxxxxxxxxxxxxxxxx>]

Hi,

I am answering my own question. A PULLUP on the RXD pin solved the
problem. The floating RXD pin had value zero, what means data, and the
processor was responding all the time, what seemed to block somehow the
processor. With the PULLUP, floating RXD pin has a value of 1, what
means no data, and processor is not overloaded any more. This PULLUP can
be configured in the ucf file in EDK.

Raul Camaras. R&D Engineer.
Nokian Capacitors GmbH 
Zum Hussenstein 7
D-78642 Konstanz
Nr.: +49 7531 9189649. Handy: +49 151 17337921
Fax 07531/919574
www.nokiancapacitors.de
Geschäftsführer Ralf Jessler
Sitz Konstanz
Registergericht Amtsgericht Freiburg i.Br. HRB381566


-----Ursprüngliche Nachricht-----
Von: owner-microblaze-uclinux@xxxxxxxxxxxxxx
[mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] Im Auftrag von Raul
Camaras
Gesendet: Donnerstag, 21. Februar 2008 11:18
An: microblaze-uclinux@xxxxxxxxxxxxxx
Betreff: [microblaze-uclinux] Booting without terminal

Hello,

I have experienced that sometimes when I boot uClinux without terminal
connected to stdout/stdin(RS232), it does not end booting, and hangs up
just before writing the login prompt, what seems to cause i.e. tcp/ip
applications not to work. If I just then connect terminal, login prompt
appears and all the rest works well. I would like of course to boot
without need of terminal.

Did anybody experience this before, and what can be done?
Thanks a lot.

Best regards,

Raul Camaras. R&D Engineer.
Nokian Capacitors GmbH 
Zum Hussenstein 7
D-78642 Konstanz
Nr.: +49 7531 9189649. Handy: +49 151 17337921
Fax 07531/919574
www.nokiancapacitors.de
Geschäftsführer Ralf Jessler
Sitz Konstanz
Registergericht Amtsgericht Freiburg i.Br. HRB381566


-----Ursprüngliche Nachricht-----
Von: owner-microblaze-uclinux@xxxxxxxxxxxxxx
[mailto:owner-microblaze-uclinux@xxxxxxxxxxxxxx] Im Auftrag von John
Williams
Gesendet: Freitag, 15. Februar 2008 03:33
An: microblaze-uclinux@xxxxxxxxxxxxxx
Betreff: Re: [microblaze-uclinux] u-boot build question

Hi A,

A. Bose wrote:

> I am trying to port the Avnet LX50 eval board. I can get a basic
kernel 
> to boot by modifying the auto-config.in file for microblaze-auto etc..
, 
> but I having problems building u-boot.

> If there is no support for my board in the u-boot directory does that 
> mean I cannot build u-boot as per the README in the u-boot directory?

No.  petalinux contains a generic microblaze-auto u-boot target, which 
is sufficient for almost every standard board.  The u-boot config system

is automatically updated according to the system parmaters, in the 
auto-config.in  file.

> microblaze-uclinux-gcc -g  -Os   -D__KERNEL__ -DTEXT_BASE=0x8ffc0000 
>
-I/home/devel/petalinux-v0.30-rc1DEV/software/petalinux-dist/u-boot/incl
ude 
> -fno-builtin -ffreestanding -nostdinc -isystem 
>
/home/devel/petalinux-v0.30-rc1DEV/tools/linux-i386/microblaze-uclinux-t
ools/bin/../lib/gcc/microblaze-uclinux/3.4.1/include 
> -pipe  -ffixed-r31 -D__microblaze__ -mno-xl-soft-mul -mcpu=v7.00.a   
> -Wall -Wstrict-prototypes -I ../board/petalogix/microblaze-auto/ -c -o

> cache.o cache.c
> 
> {standard input}: Assembler messages:
> 
> {standard input}:185: Error: unknown opcode "nopnop"

this is a known bug in our u-boot distro - simply edit to add semicolons

after each "nop" instruction in the code fragment that you quoted.  This

is fixed internally, and will be updated in the next release.

It is triggered only when a system is built without caches (which is 
pretty rare, since performance is poor).

Regards,

John
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