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Sniffing the Rigol's internal I2C bus

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Jog:
Hi, I am not sure but I found it  as pdf on the rigol hp directly. You can search. Rg Jog

LoyalServant:
This method worked for me with a tweak, see below....


--- Quote from: Jog on September 28, 2014, 09:49:05 am ---Hi together,

good news & bad news.... |O

Scope DS2072a FW 03. SP1, HW2.0

Memory dump with: echo :SYST:UTIL:READ? 15441920,13262848 | ncat -i 1 SCOPE_ADDRESS_HERE 5555 > DS2072A_sdram.bin
works fine. 12,9MB. :-+

rigup DS2072A DS2072A_sdram.bin > opt.txt
works also fine and generates 4 different keys (only all options, 100MHz full option, 200 & 300) and I try all but they sems not to fit.
PS: also rigup scan DS2072A_sdram.bin > ec_decoded.txt works also fine an generates valid entries :-+

BUT entering the key over:
a) Scope directly = 0 reaction
b) over Ultra Sigma SCPI command ":SYSTem:OPTion:INSTall key" = 0 reaction
c) over Ncat via LAN "echo :SYST:OPT:INSTALL A_KEY_FROM_OPTIONS_WITHOUT_DASHES | ncat -i 1 SCOPE_ADDRESS_HERE 5555" = also 0 reaction

 :(

Any ideas/hints why it fails?

Update: Scope was blocked by to many false tries to enter unknown Options. After factory reset (multipress left gray button #6 multiple during booting) and retry to enter generated keys

 :D :D :D :D IT works!  ;D ;D ;D ;D

many thanks to all!

--- End quote ---

One small tweak:
I changed...

--- Quote ---echo :SYST:UTIL:READ? 15441920,13262848 | ncat -i 1 SCOPE_ADDRESS_HERE 5555 > DS2072A_sdram.bin
--- End quote ---
To:

--- Quote ---echo :SYST:UTIL:READ? 15441920,13262848 | ncat -i 1s SCOPE_ADDRESS_HERE 5555 > DS2072A_sdram.bin
--- End quote ---

The scope is not answering fast enough for some reason so ncat was dropping an empty file.

Confirming the 300Mhz key did NOT work for me.
The output of rigup said it was untested and unconfirmed.. so confirming at least for me it was a no go.
The 200Mhz key did work.

Cheers guys.

Jog:
Hi Rf, normaly not necessary to change the ncat -i 1 to 1s because -i stands for idle time. For me it was no different because the file size was the same. But know you have a 200mhz. Have fun

LoyalServant:

--- Quote from: Jog on September 30, 2014, 04:26:43 am ---Hi Rf, normaly not necessary to change the ncat -i 1 to 1s because -i stands for idle time. For me it was no different because the file size was the same. But know you have a 200mhz. Have fun

--- End quote ---

Yes, it is the idle time... but the -i option without any additional parameters is assumed to be milliseconds.
That means ncat needs to have some data coming at it within 1 millisecond.... that's cutting it close which is why I had trouble.
Just posted for others that might not know what ncat is or how to use it.

I am curious about the feature that Rigol has in this scope to dump the ram like that...

Fungus:

--- Quote ---After factory reset (multipress left gray button #6 multiple during booting) and retry to enter generated keys...

--- End quote ---

Is there a secret 'reset' button like this for the DS1000Z ?

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