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Sniffing the Rigol's internal I2C bus

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stuartk:
Hi Anders,

Two questions:

1. Is there any benefit to resetting the serial number to the actual number of the unit? Scope works fine now.

2. I would have to downgrade my FW from 00.00.01.00.05 down to the .02 FW for the patch to work.

Should I leave the FW at the 1.00.02 or upgrade it to the latest 00.02.01.00.03? Does one put the Keygen key in before or after the FW upgrade?

Thanks again, Stuart

granz:

--- Quote from: MrKrabs on January 17, 2014, 04:50:53 am ---
Thanks a lot, granz! Your tool made it much easier to recalculate the CRC and get the segment lengths & locations!

--- End quote ---

Glad it was useful.  Do you (or anyone else) happen to know what's missing from my understanding of the GEL file format?  I've only had limited time to spend poking around with a hex editor, but I'd like to fill in the last few gaps.  If I knew what's missing I could create (and post) a pair of tools, one to de-GEL and one to re-GEL with the correct CRCs after any code hacks.

Here's what I have for the segment info blocks currently:

typedef struct
{
    UInt32 Length;
    UInt32 Offset;
    UInt32 Check; // CRC32
    UInt32 UnknownA;
    UInt32 Address;
    UInt32 UnknownB;
    UInt32 UnknownC;
} SectionInfo;


Unknowns A, B, and C seem to be mostly zeroes.

AndersAnd:

--- Quote from: stuartk on January 17, 2014, 03:50:59 pm ---1. Is there any benefit to resetting the serial number to the actual number of the unit? Scope works fine now.
--- End quote ---
Probably not, but I would still do it in case you later have to send it in for a warranty repair or something.



--- Quote from: stuartk on January 17, 2014, 03:50:59 pm ---Should I leave the FW at the 1.00.02 or upgrade it to the latest 00.02.01.00.03? Does one put the Keygen key in before or after the FW upgrade?
--- End quote ---
You should definitely upgrade to the latest FW, som fixes and improvements have been made + support for CAN decoding.
Uninstall all keys before upgrading. First apply new keys after upgrading to the latest FW.

stuartk:
Hi Anders,

I used the windows KeyGen v.2.0b1 by synapsis
which was the most recent one I could find.
the code used was: DSAZ

alank2:

--- Quote from: AndersAnd on January 17, 2014, 03:31:50 pm ---You can restore your DS2000's original serial number following this procedure: https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/msg369122/#msg369122
--- End quote ---

Excellent; I got my serial number fixed using this!!!

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