Products > Test Equipment

Sniffing the Rigol's internal I2C bus

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ju1ce:

--- Quote from: neamyalo on December 24, 2013, 01:20:45 pm ---It turns out that my JLink/urjtag connection is not hanging, instead its just going really really slow  :=\
I've set the frequency to 6 MHz, but its so slow its more like a few kHz (I would check with my scope but the CPU is halted....)

The main problem is the SDRAM - I'm currently trying to dump the full SDRAM address space (128 MB) and its only 1% through after 30 minutes - its going to take too long.... (50hrs?)

On the board it looks as though there's only a single 32 MB SDRAM chip connected to the bf526. I'm gonna assume that its address range is 0x0000 0000 to 0x01FF FFFF and limit the SDRAM dump to that instead.

Sorry for the bad news, but I'm goin to persevere and will let you know how it goes.

If anyone has a J-Link running with urjtag at a decent speed let me know!

--- End quote ---
Any progress in this Segger J-Link speed issue? I started a dump of my DS2072A (serial DS2D1542xxxxx) FW 00.02.01.00.03, and it will be ready tomorrow night at this pace...

tirulerbach:

--- Quote from: hammy on January 13, 2014, 10:57:25 pm ---If someone provided already a dump from a scope from the same week like yours, it is not necessary to do this dump.

--- End quote ---

:wtf:

Clear and brief: Bullshit.  :--

We have only a few f*cking dumps. But we need 20, 30 or even more dumps to build a valuable data basis.


--- Quote from: hammy on January 13, 2014, 10:57:25 pm --- In this case be nice to tirulerbach or zombie28 and ask for a key.

--- End quote ---

This simply won't work. Begging for keys is wasted time. Show your support by providing dumps or some other help. That's the only way to take part of the game.


--- Quote from: granz on January 14, 2014, 01:43:59 am ---When I then tried the 200MHz key it converted to a DS2202A with 2ns TB. 

--- End quote ---

Did the scope showed the "200 MHz option" or did the scope show really a different model number?  ???
What is the behavior of non-A-models on bandwidth upgrades?


--- Quote from: granz on January 14, 2014, 01:43:59 am ---Tirulerbach can probably comment more, but he did say the 300MHz option was absolutely untested...

--- End quote ---

Don't know anything about the 300 MHz option, but only install one out of the four licenses. So hook up USB to your scope and use a terminal to tidy up. Beyond that, read your PM.


--- Quote from: Flipp on January 14, 2014, 06:03:08 pm ---BTW. I just found out that my DS2072A is another 42nd weeks product just like tirolerbachs DS2202A is one. It would be nice to know if the private keys they used are consistent over the DS2kA series within every production week, wouldn`t it?

--- End quote ---

A dump will help.

NikWing:
uah ... I'd make a memdump if I had linux (which can be downloaded, windows is not possible, if I got it right), a spare PC to install it on (which I dun have), a USB jtag (only have serial, gah)
beside that, I'm now puzzled about the way to connect after reading the posting above (about the 3V3 connection) -_-;
aaaand I'm kinda scared since I never jtagged something before and might break the DSO and risk warranty of something that costs more than I can afford over 2 months D:

but IF there's a way for me to read out a memdump and real good fool-proof instruction for complete jtag noobs who are scared to break the device, I'll try my best to get one >_>

neslekkim:

--- Quote from: NikWing on January 14, 2014, 08:47:50 pm ---but IF there's a way for me to read out a memdump and real good fool-proof instruction for complete jtag noobs who are scared to break the device, I'll try my best to get one >_>

--- End quote ---

this? https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/msg365951/#msg365951

Only thing I need, is to find out which pins on my ftdi2232h breakout (dangerousprototypes) I need to connect to jtag..
and maybe I need linux, but that can be done in an VM using virtualbox or something I guess, no need for an separate computer.

NikWing:
maybe a linux live dvd works (though I'm no linux guy AT ALL, I dun really like it lol)
yes, I know the how-to, but recent posts were about the 3V3 connection and that it shouldn't be connected to the pin in the DSO
and I only have seen an old atmel AVR jtag at work, no idea if it's broken or compatible, beside the com/sub-d port XD
troubles XD

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