Products > Test Equipment

DG4000 - a firmware investigation

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tv84:
 :-DD  How do you get all that stuff in Antarctica??

RoGeorge:

--- Quote from: GonzoTheGreat on August 04, 2020, 04:50:01 pm ---
--- Quote from: tv84 on August 04, 2020, 04:38:16 pm ---You need to use a small pen and not worry with those inner works.

--- End quote ---
I need to worry about these details because, the smallest pendrive I have is 8GB.

I tried local computer stores - nothing
I tried local toy stores - nothing
I tried local novelty stores - nothing
I even asked my neighbors - nothing (although when I offered to trade a new 64GB pendrive for an old small used one, they suspected it was some kind of scam).

--- End quote ---

Try an USB SD card reader with any card inside.

GonzoTheGreat:

--- Quote from: PeDre on August 04, 2020, 05:46:01 pm ---Here is the information from my 1 GB USB stick I use for the DG4000.

--- End quote ---
OK, I adjusted the partition table and the FAT16 parameter block to be as close to yours as possible (see the attachment), Windows can mount and write to this pendrive, chkdsk reports no errors, but it does not work with the DG4000.
The DG4000 just hangs there with the MOD, UTILITY and STORE buttons lit up steadily (there was a brief burst of activity indicated by the pendrive's LED when I inserted it, though).

GonzoTheGreat:

--- Quote from: PeDre on August 05, 2020, 05:41:27 am ---You could record the USB protocol during the update from the USB stick. Once from a good and once from a bad USB stick. I'd have the option to do that. But searching the log is gonna be tedious.

--- End quote ---
Yup, that would be the next step in the analysis of the problem, but I don't have a USB capture device ...nor a DG400 "approved" pendrive for comparison.

GonzoTheGreat:

--- Quote from: RoGeorge on August 04, 2020, 07:09:16 pm ---Try an USB SD card reader with any card inside.

--- End quote ---
I did, without success ...but not with the clone of the "approved" FAT16 file system like before.
The MOD button is lit up steadily and the UTILITY button flashes slowly ...forever.

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