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

[Markus Klotzbücher]

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?

> 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.

> 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