Products > Test Equipment

Sniffing the Rigol's internal I2C bus

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ZeroAviation:
@buergi

Epic first post!!!!

Cheers!

tirulerbach:

--- Quote from: battlefield on January 11, 2014, 12:51:08 pm ---Ok so I'm getting myself an JTAG cable but its not listed on that page. Mine is Olimex ARM-USB-OCD, now can someone please tell me if it will work or not?

--- End quote ---

Works. I made the dump using this one. The only caveat was the 3.3 Volt reference. The 3.3V reference on the DS2202A JTAG header was to weak for the ARM-USB-OCD. I used 3.3V from a header in the vicinity of the BNC socket:


--- Quote from: tirulerbach on December 28, 2013, 10:07:32 pm ---There is a "SPI BOOT" header oh the right side of the PCB. Pin 7 has 3.3 Volts and it works...

--- End quote ---

I didn't use any pullup resistors etc. but just connected the ARM-USB-OCD straight to the DS2202A using short (about 6cm) jump-wires and set the JTAG speed to 6 MHz. Dump took about 15 minutes. Too bad, I made no photos.

elecBlu:

--- Quote from: van-c on January 11, 2014, 07:02:53 pm ---Has it actually been verified that the HW 2 version with 300 MHz enabled does not have the overshoot and stability problems demonstrated for HW 1?  Did someone post a graph showing the HW 2 frequency response?  I have re-checked the thread but may have missed it.

--Van

--- End quote ---

did some tests but i'm not able to do a proper frequency response chart during some problems with my generator. check my older posts for details and 300MHz measurements.

andyturk:

--- Quote from: marmad on January 11, 2014, 04:53:57 pm ---Nice summary. andyturk (the OP) should copy and paste a link to this post in the first post of the thread.

--- End quote ---

Good idea. Done.

cybermaus:

--- Quote from: seronday on December 13, 2013, 12:11:50 am ---Minor correction to my previous post after some further investigation.

DSHA also enables the 500uV setting and another unknown, (at present), option.

--- End quote ---

Just a report back in case others DS1074Z users are searching for it: The unknown DSCA option does not seem to be related to the signal generator.

As I had the less common -S model I was thinking (hoping) the unknown option was related to the signal gen, which means most people would not notice its effect. So I memorized all the signal menu and inserted the option. But I found no extra menu or option afterward. (Especially I was hoping for  a SWEEP option, that is a big miss in the SG functionality)

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