[U-Boot-Users] U-boot AMCC yosemite board 440EP

Föll, Tobias TFoell at jetter.de
Wed Oct 4 08:36:08 CEST 2006


 

-----Ursprüngliche Nachricht-----
Von: Markus Klotzbücher [mailto:mk at denx.de] 
Gesendet: Freitag, 29. September 2006 12:03
An: Föll, Tobias
Cc: u-boot-users at lists.sourceforge.net
Betreff: Re: [U-Boot-Users] U-boot AMCC yosemite board 440EP

Hi Tobias,

"Föll, Tobias" <TFoell at jetter.de> writes:

> i have a hardware which is very near to the yosemite board called 
> JC-670.
> The yosemite board has 4 DDR chips and my hardware has only two chips 
> (2*Micron 64V16M16 has 256Mbit...), because i need only 
> 256MBit*2Chips=512MBit=64Mbyte.

Are the chips on both boards identical?


Tobias: Yes !

> It seem that i have problems with the DDR interface. 
> I downloaded the u-boot bin file from the AMCC -> denx page, and 
> programmed it into the flash on my hardware called JC-670.
> On the serial output i saw that the system starts up. But then it 
> hangs...

It seems to me that the SDRAM initialization for your new board is broken/incomplete. You need to fix it.

Tobias: But i programmed the original u-boot into the flash. Because of this it is the correct 
Initialization !

> I can try this several times the difference is that sometimes i got 
> the DRAM size(like first output) and somtimes not (like second 
> output).
> Thats all. Must i change the u-boot code if i only use two DDR Chips ?

Not necessarily, but in your case it seems so.

> On the moment i can not generate a new u-boot bin , because it will 
> not work with cygwin under windows.I tried it.
> And i'am not a linux expert, because of this i can not do this work 
> under linux on the moment.

Well, maybe this is the right time to become one?

Regards

Markus Klotzbuecher










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