Products > Test Equipment
Sniffing the Rigol's internal I2C bus
dtran11:
Does anyone know what the unknown option for the DS1000Z is for yet? I just installed it but would like to know what it is for. Also how do I revert back to DS1074Z?
Thanks
AndersAnd:
--- Quote from: dtran11 on December 28, 2013, 08:34:11 pm ---Also how do I revert back to DS1074Z?
--- End quote ---
I already mention that in a previous answer to your question: https://www.eevblog.com/forum/testgear/sniffing-the-rigol's-internal-i2c-bus/msg355312/#msg355312
--- Quote from: AndersAnd on December 28, 2013, 07:03:11 pm ---
--- Quote from: dtran11 on December 28, 2013, 04:23:30 pm ---Also is there anyway to revert the options if I need to send in for repair?
--- End quote ---
Use the SCPI command ":SYSTem:OPTion:UNINSTall" to remove installed option keys again. Search this topic for :SYSTem:OPTion:UNINSTall
--- End quote ---
m-joy:
--- Quote from: alank2 on December 28, 2013, 08:12:23 pm ---neamyalo thank you for your work - would you be willing to upgrade to the latest firmware and repeat the full dump?
Your dump says it is 00.02.00.00.04 and the latest fw I know of is 00.02.01.00.03.
Thanks!
--- End quote ---
Does that change anything?where is cybernet btw...
Avotronics:
Thanks!
[/quote]
where is cybernet btw...
[/quote]
What are we, his nannies? Lol ;-)
tirulerbach:
Hello,
I remembered I'm owning a JTAG-Dongle... :-/O It is an Olimex ARM-USB-OCD. In the meantime I opened my DS2202A, attached the JTAG, downloaded the bfin-uclinux stuff and started urjtag:
--- Code: ---jtag> cable arm-usb-ocd
Connected to libftdi driver.
jtag> frequency 500000
Setting TCK frequency to 500000 Hz
jtag> detect
warning: TDO seems to be stuck at 0
jtag>
--- End code ---
Lower frequencies didn't work either...
So after fiddling a little bit I assume that the Utst Voltage (3.3V) on Pin 1 on the JTAG header is to weak. According to the schematic posted above it is connected via a pull-up of 10k to 3.3 Volts. The voltage drops to about 1.8V when I connect the JTAG-dongle. That is about 150uA.
So, do you think I just can use an external 3.3V supply for the JTAG-dongle?
Maybe this is the same issue which neamyalo very slow jtag speed? What do you think?
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