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Sniffing the Rigol's internal I2C bus
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AndersAnd:

--- Quote from: Rigby on January 22, 2014, 06:41:12 pm ---Anyone have the DP832 00.01.09 firmware?  What does it fix?
--- End quote ---
Maybe the only thing it fixes is the possibility to downgrade, to stop the keygen hack?
They already stopped the keys from working in 08, but people could still downgrade to 06 and use the keys, so that fix didn't really work for them. So now they have stopped the possibility of downgrading in 09.
Rigby:
I think you're right.

After looking for about 250ms, I found this thread (https://www.eevblog.com/forum/testgear/rigol-dp832-power-supply-firmware-upgrade/) which is generally not positive about the 09 firmware.
rsivan:
Hello
If someone can read the spi flash 25x40 of dp832a; I can try to turn my 832 into 832a, because fw is same.
Also other option is a full cloning spi flash + nand flash from 832a to manually program in a 832.
marmad:

--- Quote from: Rigby on January 22, 2014, 06:51:06 pm ---After looking for about 250ms, I found this thread (https://www.eevblog.com/forum/testgear/rigol-dp832-power-supply-firmware-upgrade/) which is generally not positive about the 09 firmware.

--- End quote ---

I would generally be suspicious of any Rigol firmware that comes in two separate sections to load - one following the other: you can pretty much be certain that the bootloader is being changed.
rsivan:
I compared the new 1.09 bootloader of dp800, and almost same file I found in 25x40 spi flash so: bootloader is in 25x40 confirmed!
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