Hi,
I have a custom board running a 405GPr that is based off of the walnut ref board with the exception that we have a 512KB boot prom starting @ fff80000 which is where I burn uboot. I have ported u- boot-1.1.3 to the board with the assistance of a BDI2000 which seems to work well. I get the uboot UI and am able to read and write to sdram and flash, however if I remove the jtag uboot crashes at startup. My first thought was that it's a timing issue as the jtag would hold the board in reset on power up. I questioned this when I discovered that I can somewhat simulate this with the BDI2000 by issuing a reset run 1000. This approach would seem to indicate that it is crashing when attempting to access an sdram address. What I don't understand is why there would be a difference with the sdram initialization between powering up the target and issuing a bdi >go and issuing a >reset run xxxx? Any suggestions you have would be greatly appreciated!
thanks,
Don Pruitt