Electronics > Repair
Agilent 34461A corrupted flash
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analogRF:
I managed to get into the bootloader menu on my good meter (you must be very quick in pressing the space after bootcmd command) and as I expected, there the image addresses are d0620000 and d2120000 which matches the env variables. and also the "v" command (verify images) works but on my bad meter the image addresses are wrong and the verify command just hangs and i have to power down.

definitely the unit tries to read image from wrong address.

where are the bootloader parameters stored?

I checked my p-boot dump and it is exactly identical to the good meter
analogRF:
does anybody know where is the 64kB flash memory indicated in the u-boot:

--- Code: ---CPU:   SPEAr320
DRAM:  128 MiB
Unknown id: 0xffffff. Using ST_M23P40
Flash: 64 KiB
NAND:  INTERNAL ECC 128 MiB
--- End code ---

there is not flash memory on the board. Just the NAND and RAM.
analogRF:
even the difference between the wrong  image addresses is about 19MB which is too small. I mean if one image would have been at d0400000 it would have overlapped with the second image.

where does pboot gets it boot parameters from?

I just noticed that when the bootloader stops it also reports a false MAC address 04:02:02:20:02:02 instead of the correct one 80:09:02:0e:7a:4f
nonetheless I am able to use "download from platform builder" option to get the nk.bin file over the ethernet and boot the meter. It gets IP using the wrong MAC address. But after booting, the meter shows the correct mac address!?

So it is reading whole bunch of wrong boot parameters from somewhere...
tv84:
@ElectronMan or @TheSteve might give you a hand here.
coromonadalix:
mabe searching  windows CE or embedded booting processes could give an hint ??
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