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| Sniffing the Rigol's internal I2C bus |
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| jouyang3:
Hello guys, does anyone know how shall I connect to the Blackfin JTag via Altera USB-Blaster? (I am hacking DS2072A with v3 kernel). I have connected to the board through the description from Analog's and Altera's datasheet yet bfin-debug complains about device not found. The TRST and SRST pins are not present in the usb-blaster, is it required to get a memory dump? One last thing, do I have to use the external circuit to make the signal recognizable through usb? If so, can anyone provide me with the schematics? (The image for the connection in previous post is no longer valid) Thank you everyone! Have a nice day! |
| pascal_sweden:
Why are people still opening up their scopes and doing all sorts of tricks with JTAG to hack their scope, while you can simply send SCPI commands to enable all the options for free? https://www.eevblog.com/forum/testgear/unlockinghacking-the-rigol-ds2000a-series-scope-the-short-post/msg559767/#msg559767 Or does that SCPI hack not work on all Rigol models? Which models work? Which models don't work? Does it still work in the newer firmware versions? |
| miguelvp:
Simple, some people are curious on how things really work inside, maybe just to get a better understanding on how it's done or maybe because they want to do their own custom firmware for whatever they think they can add into the scope that is not there. Maybe as simple as being able to play pong on it :) |
| pascal_sweden:
Isn't the scope protected with a secure bootloader? Usually the firmware contains an RBL part and a DBL part: Resident Boot Loader and Dynamic Boot Loader. The RBL part is stored in the One-Time-Progammable OTP area of the flash and can not be changed. It only accepts secure (signed) boot images in the DBL part, to prevent that unauthorized software can be installed on the device. This is at least how we did it in Motorola STB products :) |
| jouyang3:
--- Quote from: pascal_sweden on May 25, 2015, 03:32:06 pm ---Why are people still opening up their scopes and doing all sorts of tricks with JTAG to hack their scope, while you can simply send SCPI commands to enable all the options for free? https://www.eevblog.com/forum/testgear/unlockinghacking-the-rigol-ds2000a-series-scope-the-short-post/msg559767/#msg559767 Or does that SCPI hack not work on all Rigol models? Which models work? Which models don't work? Does it still work in the newer firmware versions? --- End quote --- The SCPI hack works. But I just want to see how people actually did it with JTag + USB Blaster. I think this will help me understand the interface better. |
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