RE: [Ltib] Build success for LPC32xx target, kernel issues :-(

[Kevin Wells]

Hi Tim,

> I feel I'm getting VERY close, but unfortunately still having issues
> getting the board bootstrapped. Any thoughts?

You mentioned this was a new design earlier? Try writing a program to hammer 
SDRAM
to see if your SDRAM is having occasional data errors.

You can also try lowering the system clocking a bit to see if the error goes 
away.
If the issue does goes away, check your power supply for excessive noise or 
voltage
drop while SDRAM is under load. Is S1L ported to your board?

You can also try loading your kernel to 2 different locations in SDRAM and then
using the u-boot cmp command to make sure they match. If not, some SDRAM debug
may be in order...

uboot> tftpboot 0x80000000 uImage
        HW MAC address:  00:01:90:00:C0:81
ENET:auto-negotiation complete
ENET:FULL DUPLEX
ENET:100MBase
TFTP from server 192.168.1.41; our IP address is 192.168.1.188
Filename 'uImage'.
Load address: 0x80000000
Loading: #################################################################
         ###############################################################
done
Bytes transferred = 1877708 (1ca6cc hex)
uboot> tftpboot 0x82000000 uImage
        HW MAC address:  00:01:90:00:C0:81
ENET:auto-negotiation complete
ENET:FULL DUPLEX
ENET:100MBase
TFTP from server 192.168.1.41; our IP address is 192.168.1.188
Filename 'uImage'.
Load address: 0x82000000
Loading: #################################################################
         ###############################################################
done
Bytes transferred = 1877708 (1ca6cc hex)
uboot> cmp.b 0x80000000 0x82000000 0x1ca6cc
Total of 1877708 bytes were the same
uboot>

thanks,
Kevin

> Subject: [Ltib] Build success for LPC32xx target, kernel issues :-(
> 
> Greetings again-
> 
> I finally had a successful build for the LPC3250. I copied the rootfs
> to an ext3 formatted SD card, updated my uboot parameters, and pulled
> the kernel from my tftp server (there does not appear to be a way to
> boot the kernel from the SD card...). The kernel loads but I'm getting
> a CRC error:
> 
> uboot> tftpboot
>         HW MAC address:  00:01:90:xx:xx:xx
> ENET:auto-negotiation complete
> ENET:Link status up
> ENET:FULL DUPLEX
> ENET:100MBase
> TFTP from server 172.16.23.44; our IP address is 172.16.23.91
> Filename 'uImage'.
> Load address: 0x80100000
> Loading: T
> #################################################################
>          ######################################################
> done
> Bytes transferred = 1737596 (1a837c hex)
> uboot> bootm 0x80100000
> ## Booting kernel from Legacy Image at 80100000 ...
>    Image Name:   Linux-2.6.27.8
>    Image Type:   ARM Linux Kernel Image (uncompressed)
>    Data Size:    1726792 Bytes =  1.6 MB
>    Load Address: 80008000
>    Entry Point:  80008000
>    Verifying Checksum ... Bad Data CRC
> ERROR: can't get kernel image!
> 
> I feel I'm getting VERY close, but unfortunately still having issues
> getting the board bootstrapped. Any thoughts?
> 
> --Tim
> 
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