Unable to follow simpleserial AES tutorial

Embedded Security ChipWhisperer Software
21

Hi Jean-Pierre

Finaly I’ve been able to program the target and run completely the PA_Intro_1-Firmware_Build_Setup.
:+1::+1:

To do it I had to disconnect both the MEASURE and GLITCH coax cable (until last experiment I had the MEASURE coax cable connected).

Is it correct or there is something wrong with the Hardware?

22

That’s great, happy to hear it.
You may have run into a known issue that I’d forgotten about, where the MOSFET used for glitching becomes stuck (see here, here).

Can you check the voltage between the middle pad and either one of the side pads of the glitch port? (should be 3V).

I’m also curious if you’re able to progress further on the tutorials?

Jean-Pierre

23

Dear Jean-Pierre,

I’ve checked the voltage on glitch port : it is about 60mV so it seems to be good, isn’t it?

In the meantime I’ve discovered that one of the two coax cable is shorted!!!.
Tested again with the good cable connecetd to MEASURE connector and works well.

Is there a way to obtain a working cable (we’ve bought the board via Mouser) eventyually returning the wrong one?

About the tutorials: I’m going on slowly, looking forward for next week end to have some time to go on.

Thank you again
Maurizio

24

Good catch on the bad cable – that’s the root cause of your problems right there.
Can you message me your email address so I can follow up regarding your bad cable?
Jean-Pierre

25

Hi Jean-Pierre,

I’m not sure I’ve sent you a message with my email. Can you confirm it?
If not can you give me some info on how to share it with you?

Thanks

26

Hi there,

Just bumping this because I’m running into this problem as well on the XMEGA boards.

I don’t think it’s completely an isolated issue with stuck MOSFETs since I’m running into the same problem. It might be a problem with the API?

Additionally, I’ve tried the simpleserial AES tutorial using an STM32F3 board I have, which works fine, further suggesting it may be a problem with the software.

27

Hi,
When you switch from the STM32 target to the XMEGA target, are you changing the PLATFORM variable accordingly in the notebook? If so, what exactly is the error message that you get?
Jean-Pierre