David Oswald

libfreefare has DESFire support, so it works with any libnfc-compliant reader. The libfreefare code could also be useful as a reference how the reader side works. However there are some...

Maybe the captures here help: http://adamsblog.aperturelabs.com/2013/02/atmel-sam7xc-crypto-co-processor-key.html Otherwise give us a few days and we'll get/find something.

This seems to be a problem specific to your installation - can you post more details like avrdude version etc.?

Yes the device does not indicate that it is in the bootloader (both LEDs are off)

Thanks for testing. We used the only minimally modified standard AVR flip bootloader, which is pretty standard. You can try to use dfu-programmer as an alternative to avrdude, either as...

Yes, the above command line looks correct to me. There could be a deeper problem with DFU and USB on certain OSes. Can you try the commands directly on the...

As Simon mentioned, USB3 could be a problem apparently - can anyone who has problems try with a USB2 port?

If it's a problem of the USB cable then either voltage drop over the cable (very unlikely imho since the current drawn by the Chameleon is quite low) or (much...

Definitely interested in 1-2 of them.