Many thanks Stelian for the replies. My comments inline.
Norman
Stelian Pop wrote:
Le mercredi 25 juin 2008 à 01:36 +0000, Norman Cheung a écrit :
I am struggling with this problem for a week now and not making any progress. So any suggestions, ideas or pointer will be greatly appreciated.
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Since the post earlier, I have narrowed the problem to the bootstrap during the copy from NAND to SDRAM, memories are corrupted. I think I have a marginal NAND chip. I played around the SMC cycle timing in bootstrap, I have a setting that I can boot u-boot with power cycle 6 out of 10 times. So I am convinced that it is not an u-boot issue, Thanks!
The board works with u-boot 1.3.2 and at91bootstrap(1.5 I only have the binary) booting from NAND.
The source (for the latest version) is freely available on the Atmel site: http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4093
If you really need the source for an older version, I'm sure the Atmel support will send it to you upon request.
U-boot fails intermittently at the start. When it fails, it didn't make it to my first printf statement. When I use JTAG to debug it, it always works.
If the board has been let without power for 1+ hour, it will also boot up when I apply power to it(something to do with the battery perhaps).
Did you try disconnecting the battery ? Or replacing the battery with a new one ?
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I tried disconnecting the battery and with the new SMC timing changes, I can boot up only one time after disconnecting the battery. I will go and get a new battery.
We had at91bootstrap 1.5 working well in 32-bit mode with u-boot 1.3.2. But I don't have the source.
See above.
I wonder what is the current stable version of u-boot and at91bootstrap?
AT91Bootstrap seems to be at v1.9.
As for U-Boot, try the latest git (which will soon be u-boot v1.3.4).
(BTW, if Wolfgang is listening, it would be nice to have proper tags in git as well as releases on the ftp server for the -pre version. Since the merge window is closed, I guess we're up to v1.3.4-pre1 now, but this version tag cannot be found anywhere...)
Stelian.