[U-Boot-Users] Booting with attached BDI but not alone

[U-Boot-Users] Booting with attached BDI but not alone

[DI BACCO ANTONIO - technolabs]

Hi,
 
I downloaded an u-boot.bin (1.1.4) on to my flash (a board with MPC875).
If I connect BDI and type go I see output on my serial console. If I
start the board without the attached BDI nothing appears. 
 
Any hint?
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[U-Boot-Users] Booting with attached BDI but not alone

[David Hawkins]

> I downloaded an u-boot.bin (1.1.4) on to my flash (a board with MPC875). 
> If I connect BDI and type go I see output on my serial console. If I 
> start the board without the attached BDI nothing appears.
>  
> Any hint?

Probably the BDI is configuring something correctly that
your startup code is not.

Compare the register settings in the BDI configuration
file to what is in the startup code.

Dave

[U-Boot-Users] Booting with attached BDI but not alone

[Ben Warren]

DI BACCO ANTONIO - technolabs wrote:
> Hi,
>  
> I downloaded an u-boot.bin (1.1.4) on to my flash (a board with 
> MPC875). If I connect BDI and type go I see output on my serial 
> console. If I start the board without the attached BDI nothing appears.
>  
> Any hint?
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>   
Maybe your BDI config file initializes something that U-boot doesn't.  
If you take everything out of the [INIT] section, do you get the same 
behavior?

regards,
Ben

[U-Boot-Users] Booting with attached BDI but not alone

[Wolfgang Denk]

In message <F1F6EC0C8B75034F9E3A79FC85122E8EA640E6@aquib01a> you wrote:
> 
> I downloaded an u-boot.bin (1.1.4) on to my flash (a board with MPC875).
> If I connect BDI and type go I see output on my serial console. If I
> start the board without the attached BDI nothing appears.
>
> Any hint?

Fix your board init code, i. e. check what the BDI init sequence is
doing and what of this is missing in your initialization parts.

Maybe yous till include - against all our recommendations - include
some setup of the memory controller in your BDI config file, and this
is missing / broken in your code.

> ------_=_NextPart_001_01C7F3C2.C92E52CE
> Content-Type: text/html;
> 	charset="us-ascii"

And don't post HTML here, please.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
Backed up the system lately?

[U-Boot-Users] Booting with attached BDI but not alone

[w.wegner at astro-kom.de]

Hi,

On 10 Sep 2007 at 17:53, DI BACCO ANTONIO - technolabs wrote:

> 
> Hi, 
> 
> I downloaded an u-boot.bin (1.1.4)on to my flash (a board with MPC875). If I connect BDI and type go I see output on my serial console. If I start the board without the 
> attached BDI nothing appears. 

just a stupid idea:
did you connect a pull-up resistor to BKPT on your board?

I heard rumours there are people who forgot this on their
own MCF5373L board... ;-)

Regards,
Wolfgang

[U-Boot-Users] Booting with attached BDI but not alone (only ICTRL remained in BDI cfg)

[DI BACCO ANTONIO - technolabs]

> just a stupid idea:
>did you connect a pull-up resistor to BKPT on your board?

My Board is an evaluation board and it worked till few months ago. 

Now I removed any initialization from cgf file of BDI. Only special
register 158 is set to 0x00000007 and I cannot remove this, otherwise
BDI complains about halting the target.

Anyway the board continues to boot only using BDI not alone.

Now I don't understand what could be the problem. Should I set SPR 158
from within u-boot to 0x00000007?

Bye,
Antonio.

[U-Boot-Users] Booting with attached BDI but not alone (onlyICTRL remained in BDI cfg)

[DI BACCO ANTONIO - technolabs]

> Now I don't understand what could be the problem. Should I set SPR 158
> from within u-boot to 0x00000007?

I saw that ICTRL is set in cpu/mpc8xx/start.S

Then I suppose BDI is doing other settings. But what?

This is my BDI cfg file (I removed all stuff except ICTRL):

; bdi configuration file for Adder/875 
; ----------------------------------------------
;
[INIT]
; init core register

WSPR    158             0x00000007      ;ICTRL: not serialized, no show
cycles

[TARGET]
BDIMODE     AGENT       	;the BDI working mode (LOADONLY | AGENT)
BREAKMODE   HARD        	;SOFT or HARD, HARD uses PPC hardware
breakpoints


[HOST]
PROMPT	adder875>
IP	10.10.0.101
FILE	u-boot.bin
FORMAT	BIN
LOAD	MANUAL

[FLASH]
CHIPTYPE    AM29BX16    ; Flash type (AM29F | AM29BX8 | AM29BX16 |
I28BX8 | I28BX16)
CHIPSIZE    0x800000    ;   8 Meg The size of one flash chip in bytes
(e.g. AM29F010 = 0x20000)
BUSWIDTH    16          ;   The width of the flash memory bus in bits (8
| 16 | 32
ERASE	    0xF8000000	; FLASH sector #0
ERASE	    0xF8010000	; FLASH sector #1
ERASE	    0xF8020000	; FLASH sector #2
ERASE	    0xF8030000	; FLASH sector #3

FILE        u-boot.bin
FORMAT      BIN

[U-Boot-Users] Booting with attached BDI but not alone (onlyICTRL remained in BDI cfg)

[DI BACCO ANTONIO - technolabs]

 
> My Board is an evaluation board and it worked till few months ago. 

> Now I removed any initialization from cgf file of BDI. Only special
> register 158 is set to 0x00000007 and I cannot remove this, otherwise
> BDI complains about halting the target.

> Anyway the board continues to boot only using BDI not alone.

> Now I don't understand what could be the problem. Should I set SPR 158
> from within u-boot to 0x00000007?

Is there any chance that the board is broken? I think I connected a
wiggler to the BDM port in the wrong position for only a while. But why
should it boot with attached BDI if is it broken?

[U-Boot-Users] R: Booting with attached BDI but not alone (onlyICTRL remained in BDI cfg)

[DI BACCO ANTONIO - technolabs]

> Is there any chance that the board is broken? I think I connected a wiggler to the BDM port in the > wrong position for only a while. But why should it boot with attached BDI if is it broken?

I discovered that when the board is powered on, if I try to connect BDI connector trying to touch only pin 1 and 2 (vfls0 and sreset) the board starts. I suspect that bdi pulls up the sreset in some way. 

Bye.

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[U-Boot-Users] R: Booting with attached BDI but not alone (onlyICTRL remained in BDI cfg)

[David Hawkins]

DI BACCO ANTONIO - technolabs wrote:
>  > Is there any chance that the board is broken? I think I connected a 
> wiggler to the BDM port in the > wrong position for only a while. But 
> why should it boot with attached BDI if is it broken?
> 
> I discovered that when the board is powered on, if I try to connect BDI 
> connector trying to touch only pin 1 and 2 (vfls0 and sreset) the board 
> starts. I suspect that bdi pulls up the sreset in some way.

The JTAG/COP header *should* have the appropriate
pull-ups for HRESET#, and SRESET# *on the board*.
These are open-drain signals.

However, there could be a mistake on your board,
and perhaps the BDI2000 has weak pull-ups on the
BDI 'just in case' the pull-ups are missing on
the target.

Check your board schematic.

Dave

[U-Boot-Users] R: Booting with attached BDI but not alone (onlyICTRL remained in BDI cfg)

[DI BACCO ANTONIO - technolabs]

> However, there could be a mistake on your board,
> and perhaps the BDI2000 has weak pull-ups on the
> BDI 'just in case' the pull-ups are missing on
> the target.

I verified that SRESET on the BDM connector is pulled up (on the
schematic). I tried to pull up it with a wire but it doesn't work. It
only works if I connect a 10 cm wire to SRESET pin on the BDM connector
without connecting the other side of the wire (Probably it gets some
electromagnetic noise). The board starts and remains working if I remove
the wire, tehn, if I give a reset on the u-boot, the board hangs again.

Strange behaviour!!
Bye,
Antonio.

[U-Boot-Users] R: Booting with attached BDI but not alone (onlyICTRL remained in BDI cfg)

[Andreas Schweigstill]

Hello!

DI BACCO ANTONIO - technolabs schrieb:
> I verified that SRESET on the BDM connector is pulled up (on the
> schematic). I tried to pull up it with a wire but it doesn't work.

Have you used a voltage meter or oscilloscope to check the voltage
level? Have you measured the resistance between SRESET and GND and
between SRESET and supply? Have you checked if your processor pin
is connected? Probably either the pull-up resistor isn't mounted or
your PCB is defective.

With best regards
Andreas Schweigstill

-- 
Dipl.-Phys. Andreas Schweigstill
Schweigstill IT | Embedded Systems
Schauenburgerstra?e 116, D-24118 Kiel, Germany
Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436
Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/

[U-Boot-Users] R: Booting with attached BDI butnot alone (onlyICTRL remained in BDI cfg)

[DI BACCO ANTONIO - technolabs]

 
>Have you used a voltage meter or oscilloscope to check the voltage
>level? Have you measured the resistance between SRESET and GND and
>between SRESET and supply? Have you checked if your processor pin
>is connected? Probably either the pull-up resistor isn't mounted or
>your PCB is defective.

Thank you for your suggestions but my board is an evaluation board named
adder875. It worked and after connecting a wiggler with the connector
upside down exibihts this strange behaviour. Anyway I 
will measure the voltage of the pins you suggested.

Bye,
Antonio.

[U-Boot-Users] R: Booting with attached BDI butnot alone (onlyICTRL remained in BDI cfg)

[Andreas Schweigstill]

Hello!

DI BACCO ANTONIO - technolabs schrieb:
> Thank you for your suggestions but my board is an evaluation board named
> adder875.

Many development boards do not have a quality which would be
acceptable for industrial or even consumer products... Forgotten
pull-up and series resistors or capacitors are quite common.

Keep in mind that many of those boards have been designed before
the processor chip has been available. And marketing/sales departments
force development to release such a board to customers long before it
has been tested.

I have never seen a development board from a semiconductor manufacturer
which doesn't contains any bugs.

With best regards
Andreas Schweigstill

-- 
Dipl.-Phys. Andreas Schweigstill
Schweigstill IT | Embedded Systems
Schauenburgerstra?e 116, D-24118 Kiel, Germany
Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436
Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/

[U-Boot-Users] R: Booting with attached BDI butnot alone (onlyICTRL remained in BDI cfg)

[Jerry Van Baren]

Andreas Schweigstill wrote:
> Hello!
> 
> DI BACCO ANTONIO - technolabs schrieb:
>> Thank you for your suggestions but my board is an evaluation board named
>> adder875.
> 
> Many development boards do not have a quality which would be
> acceptable for industrial or even consumer products... Forgotten
> pull-up and series resistors or capacitors are quite common.
> 
> Keep in mind that many of those boards have been designed before
> the processor chip has been available. And marketing/sales departments
> force development to release such a board to customers long before it
> has been tested.
> 
> I have never seen a development board from a semiconductor manufacturer
> which doesn't contains any bugs.
> 
> With best regards
> Andreas Schweigstill

You trimmed the critical sentence "It worked and ***after connecting a 
wiggler with the connector upside down*** exibihts this strange behaviour."

Sounds like his board was damaged by operator error (improperly 
connecting to the BDI connector).  My guess is that the pullup resistor 
lost its smoke.

gvb

[U-Boot-Users] R: Booting with attached BDI butnot alone (onlyICTRL remained in BDI cfg)

[Andreas Schweigstill]

Hello!

Jerry Van Baren schrieb:
> Sounds like his board was damaged by operator error (improperly 
> connecting to the BDI connector).  My guess is that the pullup resistor 
> lost its smoke.

I agree that the board may have been damaged by the operator. But
the pull-up resistor won't be damaged except from very high voltage.

Attaching a debug interface in the wrong direction probably may
destroy it if it gets its power supply from the target. If it has
its own supply (or gets it via USB from a PC) it can be possibly
that either negative voltages (target GND connected to debugger VCC)
or high voltages (target VCC connected to debugger GND) may be
applied to the JTAG/BDM signals on the target. Such voltages may
cause small defects to the silicon which show strange behaviour
afterwards.

Regards
Andreas Schweigstill

-- 
Dipl.-Phys. Andreas Schweigstill
Schweigstill IT | Embedded Systems
Schauenburgerstra?e 116, D-24118 Kiel, Germany
Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436
Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/