Products > Test Equipment

Sniffing the Rigol's internal I2C bus

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AndersAnd:

--- Quote from: gbot on January 27, 2014, 05:24:45 pm ---I'd be happy to know if the 2202A hardware is identical to the 2072A hardware.
--- End quote ---
It is.

gbot:
Thank you!


--- Quote from: AndersAnd on January 27, 2014, 06:08:30 pm ---
--- Quote from: gbot on January 27, 2014, 05:24:45 pm ---I'd be happy to know if the 2202A hardware is identical to the 2072A hardware.
--- End quote ---
It is.

--- End quote ---

sled:
Watch out, here comes the dump: https://mega.co.nz/#!wwVi2YSZ!3o7nhjAZQ4RGAE4dks3HVjABZuFwiETEr78_JH2w-7s

Scope: DS2072A, fresh out of the box, produced in week 42.
JTAG Adapter: Altera USB Byteblaster Rev. C
Time to dump the whole memory in one piece: ~2 hours

Interestingly it was much quicker to dump the memory in pieces of 32M (took about 20minutes)

AndersAnd:

--- Quote from: granz on January 24, 2014, 02:26:13 pm ---
--- Quote from: cepphus on January 24, 2014, 11:21:10 am ---
Is this the JTAG that would work? I just got my 2072A and would just love to open it and play

http://www.ebay.com/itm/150943500360

--- End quote ---

Yes, that's the one.  In the JTAG connection diagram posted a little while back I used the second setup (pull-ups on TRST and SRST lines -- don't connect these to the programmer at all), but either way should work for you.

Good luck!

--- End quote ---
Altera USB-Blaster plug pinout (update)
http://hackingbtbusinesshub.wordpress.com/2011/09/12/usb-blaster-plug-connection/



sled:
here are some pics from my setup with the usb blaster,

Color Coding:

The TRST and SRST (white and violet) are NOT connected to the JTAG cable, they're only pulled high on the breadboard with the pull up resistors)

Gray: TCK
Green: TMS
Blue: TDO
Brown: TDI
Orange & Black: GND
Red: VCC (+3.3V)

(The wire on the breadboard that looks gray, is actually white!)

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