Help needed with CW304 Notduino Target

Embedded Security ChipWhisperer Hardware
1

Hi All,

I’m trying to perform clock/Vcc glitching on the CW304. I’ve compiled glitchsimple.c running the glitch_infinite( ) function and have attempted to program it via the CWLite AVR Programmer. While it appears to have completed programming successfully, the serial terminal return from the CW304 implies otherwise, i.e. I didn’t see stuff like
40000 200 200 0
40000 200 200 1
40000 200 200 2
40000 200 200 3
40000 200 200 4
40000 200 200 5
40000 200 200 6
40000 200 200 7 (see below).

Screenshot%20from%202019-08-16%2009-21-19
Screenshot%20from%202019-08-16%2009-21-191920×1080 365 KB

Some additional information
System clock is 7.37 MHz.
Baud rate is 38400
Tried writing the LOW fuse to D0 as suggested here CW-Lite Notduino troubleshooting - #4 by microcontroller - ChipWhisperer Hardware - NewAE Forum

Any idea what I might have missed out?
Thanks.

Regards,
Melvin.

2

Hi Melvin,

Have you also tried writing the low fuse byte as F0 instead of D0?

Alex

3

Hi Alex,

I’ve tried F0, but to no avail (see below)

Screenshot%20from%202019-08-19%2015-26-33
Screenshot%20from%202019-08-19%2015-26-331920×1080 376 KB

Any other suggestions?
Thanks.

Regards,
Melvin.

4

Hi Melvin,

Have you run the Notduino seutp script instead of the XMega one? I believe the Notduino has reversed serial pins compared to the XMega.

Alex

5

Hi Alex,

I think I missed that. They looked pretty similar given the small font of the GUI. Hahaha.
It works now =)
Thanks.

Regards,
Melvin.

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