[U-Boot-Users] SM712 + U-Boot

[Pierre AUBERT]

Bora Sahin wrote:

>Hello,
>
>Pierre> I don't think that your card has a problem, I think it isn't configured
>Pierre> properly.
>Pierre> The LynxEM4+ Rev. BA has an 32 bits internal memory bus, the Rev. AA has a
>Pierre> 64 bits internal memory bus.
>Pierre> For the Rev BA, you need to switch ON the SW2:7 configuration switch.
>
>OK, but SW2 is related to SM722. The info on the backend of the card says SW2 -> SETTING FOR SM722...
>  
>
I don't have such information on my board. I own a DK712GX04PC00-00 
400029 board.
On the upper right corner of the board, there's two blue dip switch for 
configuration. The SW1
is used for LCD panel configuration, and SW2 is used for memory 
configuration. This hardware
configuration is read once at boot time and could be overwritten by 
software. The SW2:7 switch is
connected on the MD6 signal of the SMI712 (on my board) which enable the 
32 bits memory data bus.
See the SMI712 data book at paragraph 3.
If your board hasn't any configuration switch on the MD6 signal, you can 
try to modify the MCR62 register
(address 3c5h,62).
Best regards

>Still I tried your suggestion but there is no change as I expected!
>
>AFAIK, SW1 is nothing to do with a non-x86 system. It only boots a x86 system with determined
>resoluiton. That's it! Then OS changes it to what it wants! Also U-Boot sets its own resoultion
>thanks to compile time option or videomode env. variable...
>
>Pierre> I hope this helps.
>
>Thanks...
>
>  
>