On Thursday 02 July 2009 03:57:38 pm Frank Svendsbøe wrote: > On Thu, Jul 2, 2009 at 3:32 PM, E Robertson<e.robertson....@gmail.com> wrote: > > On Thursday 02 July 2009 02:22:16 am Frank Svendsbøe wrote: > >> On Thu, Jul 2, 2009 at 6:10 AM, E Robertson<e.robertson....@gmail.com> > > > > wrote: > >> > Hi All, > >> > Has anyone used the JTAG like the BDI2000 to load u-boot onto a > >> > at91sam9263? I've done it on other boards but some some reason the > >> > code will not execute > >> > from on board SDRAM. To avoid initializing the external memory via > >> > jtag, I use the bootstrap code to do the setup then load u-boot and > >> > run it. > >> > For reason(s) I haven't figured out yet, the code will not external > >> > memory. Has anyone done this before and can provide some help? > >> > Thanks. > >> > >> How come you want to execute it from RAM? Is the board without flash? > >> Could you instead replace the "bootstrap" loader with U-Boot? > >> > >> It the SDRAM controller is already setup, I guess you must recode U-Boot > >> and tell it not to touch/re-initialize the memory controller... > >> > >> Btw, look at > >> http://www.denx.de/wiki/view/DULG/CanUBootBeConfiguredSuchThatItCanBeSta > >>rte dInRAM > >> > >> - Frank > > > > In this case, I believe things are a bit different. U-boot is not > > relocated because the bootstrap already does this and the bootstrap does > > all the init needed to set up ram (among other things). I'm tracking a > > problem which is why I'm trying to run it from ram. I've done quite a bit > > of modifications to the point where I believe this should work, but > > apparently I may have overlooked something. > > Ok. The BDI makes it possible to debug U-Boot so that you can pinpoint > where the problem occur. Have you tried that yet, and what exactly is the > problem you observe? > > Try to be more specific, then some of the Gurus here may be able to help > you. Good luck! > > - Frank
Thanks. I finally figured out what the problem is. I have s signal integrity problem on my SDRAM bus. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
