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Sniffing the Rigol's internal I2C bus

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AndersAnd:

--- Quote from: hematose on October 27, 2014, 05:13:27 pm ---So now that sptm14a has managed to upgrade the MSO1000Z, how do we get this into Riglol and the like?
--- End quote ---
Try PM'ing studio25 and ask him nicely. He's the one who created Riglol and hosted it at 3owl.

The two other Riglol sites hosted by other members are just mirrors of studio25's Riglol site at 3owl:

Original made by studio25: http://riglol.3owl.com
Canadian mirror hosted by ve7xen: http://gotroot.ca/rigol/riglol/
UK mirror hosted by Avotronics: http://rigol.avotronics.co.uk/mirrors/riglol/

Sparky:
Dear friends, I have in my possession an MSO2072A which "suffers" the problem of not being able to upgrade to 300 MHz.  When inputting the license key generated by rigup (with option NS8H) the MSO responds "License is unavailable!" (which is the usual message if you enter an incorrect code).  The 200 MHz key works fine.  This issue has been previously reported on DS2072A units; some posts are:
 
https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/msg385319/#msg385319
https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/msg414247/#msg414247
https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/msg388809/#msg388809

I noticed the suggestion to try "all options + 200 MHz" if the 300 MHz doesn't work at the end of this post:
https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/msg403624/#msg403624


To my knowledge we do not know why some units fail to be upgraded to 300 MHz and I decided to investigate.  I corresponded with a few MSO2072A owners here to see what may cause the 300 MHz option to not install by comparing hardware/software versions and the "Hardware Version" resistors.  So far I have found identical hardware/software versions, and resistor settings, which in one case the 300 MHz option can be installed, and in others it can't.

Since the 300 MHz option works for practically everyone, I think we can be confident the algorithm is correct.  I wonder if the scope does a separate check of the key against some other parameter (either resistor setting, or EEPROM values) to see if the key should be accepted.

>> If anyone has ideas about this, please tell!

Does anyone have, or could take high res photo, of the PCB of an MSO2072A unit that successfully upgraded to 300 MHz?  I would like to compare it to the unit I have open at the moment and see if I can spot any difference.

Cheers,
Sparky

EDIT: I received some photos already for comparison purposes...

plasijo:
Dear Sparky,
would you be so kind and could you share these photos with us. They should be definitely interesting for other members.
Thank you in advance, JP.

Sparky:

--- Quote from: plasijo on October 31, 2014, 11:08:20 am ---Dear Sparky,
would you be so kind and could you share these photos with us. They should be definitely interesting for other members.
Thank you in advance, JP.

--- End quote ---

I will not post the images, since they are not mine to being with.  There are few alternative sources of images that may suit your needs, however.  See here: https://www.eevblog.com/forum/testgear/first-impressions-and-review-of-the-rigol-ds2072-ds2000-series-dso/msg427482/#msg427482 or here: https://www.eevblog.com/forum/testgear/experiences-on-mso1074z-and-mso2074a/msg474215/#msg474215

PA0PBZ:
Does anyone have the 00.01.09 firmware (.gel) for the DG4000? If so, can you attach/pm me? I'm trying to see how this version can be upgraded, it doesn't work they way the older firmware did.

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