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Failed to boot from nand falsh on AM1808.

gogo49087
Prodigy 150 points
Other Parts Discussed in Thread: AM1808

Hi, all

 

I'm working on my custom am1808 board, now it boots from uart2 and runs u-boot in DDR2 memory.

After reading this forum, I followed the guide of hawkboard (http://elinux.org/Hawkboard#Signing_u-boot_for_UART_boot), I made two ais files, one for uart boot mode and one for nand flash boot mode.

The board boots from uart2 and download the ais file for nand flash boot mode, and  programmed it @ 0x20000 (128KB/block), and then switch to nand flash boot mode and reset.But it failed to boot. There is no clock on DDR_CLK, as the AIS file includes the parameters for DDR configuration.

BTW, I used nand dump 0x20000 to watch, the data was the AIS file contents.

 

So, any clues?

 

TIA & Best regards