On 5/4/09 7:43 AM, Jonathan Haws wrote:
On Thursday 30 April 2009, Jonathan Haws wrote:
I am certain that it is a hardware failure that is causing the machine check because I can use the exact same binary on another (identical) board and have it boot just fine. That tells me that all the EBC and SDRAM settings are correct;
From my experience you can't be sure that SDRAM setting are "currect" at this stage.
Would that be the case on our other 6 boards then? We have 6 boards that are up and running with the exact same U-Boot binary file. If there was a problem with the SDRAM settings on one board, would not the other board show the same symptoms? That is the reason why I have not dug deeper into the SDRAM initialization. However, I will take your advice and do so, because if there is a problem there, then the other boards may be experiencing problems, just not to the extent that this one is.
Have these additional six boards passed four corners testing with an intensive and exhaustive memory diagnostic?
Regards,
Grant