Trigger not found in ADC data. No data reported!

coflynn · March 9, 2020, 12:40pm

Hi Tom,

Yup - should work fully! It needs more tuning on the window most likely - I’m going to work on updating that lab to explain how to do that (rather than just throw some “good numbers” in magically).

So will take a bit longer, but you can see with that change even how it made a much bigger difference!

-Colin

trubino · March 9, 2020, 12:53pm

Hi Colin,

That sounds good. Please let me know when the new lab is ready.

Thanks again for your help.

Regards,
Tom

trubino · March 10, 2020, 12:40pm

Hi Colin,

We are trying to determine how to connect our board to CW. I don’t see any information on the 2-part board. Could you please direct me at any documentation on how we can do this?

Thanks and regards,
Tom

Alex_Dewar · March 11, 2020, 7:43pm

Hi Tom,

Which board are you trying to connect to the ChipWhisperer? The pinout can be found here if you’re trying to connect to an external board. The CW308 has another 20pin connector on it that you can connect to the Lite via a 20pin cable if you’re using that. See the following picture for an example (replace the CWPro with the Lite):

trubino · March 12, 2020, 12:20pm

Hi Alex,

Thanks for your help. We are trying to connect one of our parts to the CW-Lite 2-part board. What is the other connector? And, are there any instructions or specifications on how we can build our board for our chip?

Thanks and regards,
Tom

Alex_Dewar · March 12, 2020, 3:12pm

Hi Tom,

We’ve actually got a tutorial that uses a microcontroller dev board as a target that should be useful: https://wiki.newae.com/Tutorial_A9_Bypassing_LPC1114_Read_Protect. The CW308 platform is another example: https://wiki.newae.com/CW308_UFO_Target

In that case, this pinout tells you what each of the pins on the 20 pin connector does (power out, ground, communication lines, etc). You’ll also need an SMA connector on the other board for voltage measurement and/or glitching. The board will require the following:

20 pin connector following the pinout linked earlier
Shunt resistor between V+ (3.3V from CW or regulator output) and Vcc of microcontroller
SMA connector connected to low side of shunt resistor
Capacitors only on high side of shunt resistor
A shared clock between the ChipWhisperer and the target. The ChipWhisperer can either output a clock or take one as an input.
All IO voltages need to be 3.3V

Of course, you also have the option of making a CW308 compatible board with a shunt resistor. See: https://wiki.newae.com/CW308T-STM32F for an example of a CW308 compatible board.

@coflynn Feel free to chime in if I’m forgetting anything.

Alex

trubino · March 12, 2020, 4:27pm

Hi Alex,

Thank you very much for the information!

Best regards,
Tom

Alex_Dewar · March 20, 2020, 7:42pm

Hi Tom,

I’ve just added a section to the DPA attack tutorial about eliminating the ghost peaks. Let me know if it allows you to complete the tutorial.

Alex

trubino · March 20, 2020, 7:56pm

Hi Alex,

Thanks! Will do.

Best regards,
Tom

trubino · April 7, 2020, 6:01pm

Hi Alex,

I just tried it and it fails in the same way - it misses a couple of bytes. I know previously the code updated automatically for us. How can I make sure I am running the latest? The modified date says 5 hours.

Thanks and regards,
Tom

Alex_Dewar · April 8, 2020, 9:31pm

Hi Tom,

The latest version of the tutorial has a section entitled " The Ghost Peak Problem". As for getting the latest version, it usually involves running a git pull inside of chipwhisperer/.

If you have this section and are still unable to break the last few bytes, do you think you can recapture inside of a ChipWhisperer project (similar to something like CPA_1) and send it over to me?

Thanks,

Alex

trubino · April 9, 2020, 7:18pm

Thanks Alex. There is no “The Ghost Peak Problem” section. I tried using git in CW, but I don’t know how to do that. Do you have any instructions on how to do this?

Thanks and regards,
Tom

Alex_Dewar · April 9, 2020, 11:34pm

Hi Tom,

What method did you use to install ChipWisperer and what OS are you using?

Alex

31415 · April 10, 2020, 8:29am

Hi Alex,
Could you send a link to git commit?

Thx

trubino · April 10, 2020, 1:21pm

Hi Alex,

I used VirtualBox on Windows.

Thanks and regards,
Tom

31415 · April 10, 2020, 6:29pm

Tom,
I found “the ghost peak problem” on github, here:

github.com

newaetech/chipwhisperer-jupyter/blob/master/PA_DPA_3-AES_DPA_Attack.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# PA_DPA_3-AES_DPA_Attack\n",
    "\n",
    "Supported setups:\n",
    "\n",
    "SCOPES:\n",
    "\n",
    "* OPENADC\n",
    "* CWNANO\n",
    "\n",
    "PLATFORMS:\n",
    "\n",
    "* CWLITEARM\n",
    "* CWLITEXMEGA\n",
    "* CWNANO"

This file has been truncated. show original

Alex_Dewar · April 10, 2020, 7:40pm

Hi Tom,

To update ChipWhisperer on VirutalBox, you’ll need to first login to the virtual machine (should be vagrant for both username and password). Once you’re logged in, input the following commands:

cd work/projects/chipwhisperer
git pull

If the git pull doesn’t work, you may need to run:

cd jupyter
git stash
cd ..
git pull

which will stash any changes you made to the notebook (including running through them).

Alex

trubino · April 13, 2020, 1:02pm

Thanks 31415 and Alex. I successfully executed the git commands. I also ran the second set of commands and it said that it was up to date. However, now when I try to open any script, I get the following error, “Unreadable Notebook: /home/vagrant/work/projects/chipwhisperer/jupyter/PA_DPA_3-AES_DPA_Attack.ipynb NotJSONError(“Notebook does not appear to be JSON: ‘’…”,)”.

I would try and use the file 31415 linked to, but it seems that something is wrong with my setup now.

I don’t know how to resolve this. Any help is appreciated.

Thanks,
Tom

trubino · April 20, 2020, 2:33pm

Hello,

Could we please get some help with this? We have a deadline where we need the DPA attack working on our part soon

Thanks and regards,
Tom

jpthibault · April 20, 2020, 6:12pm

Hi Tom,

It’s a mystery to me why you can’t run the notebook, it works for me. My best guess is that you somehow have got an HTML-ized version of the notebook, as here: https://github.com/jupyter/help/issues/67

Can you try simply saving this file from your browser:
https://raw.githubusercontent.com/newaetech/chipwhisperer-jupyter/master/PA_DPA_3-AES_DPA_Attack.ipynb

Then move it into your VM.

Jean-Pierre