A problem about the "unknown device"

emsec / ChameleonMini

The ChameleonMini is a versatile contactless smartcard emulator compliant to NFC. The ChameleonMini was developed by https://kasper-oswald.de. The device is available at https://shop.kasper.it. For further information see the Getting Started Page https://rawgit.com/emsec/ChameleonMini/master/Doc/Doxygen/html/_page__getting_started.html or the Wiki tab above.

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A problem about the "unknown device" #10

Closed YangWang92 closed 9 years ago

YangWang92 commented 9 years ago

I made a ChameleonMini by myself. Here is my step to download the firmware:

connect the board to PC
use avr isp mkii to download the bootloader(RevE-atxmega32a4u_104_modified.hex)

I can see a device named ATxmega32A4U

3.after that, I dowload the firmware/eeprom Chameleon-Mini.hex/Chameleon-Mini.elf with avr isp mkii,and I got this:"Unknown device"(at that time, one led turns on), and I also use the FLIP to download the firmware/eeprom, I got the same result.

I want to know what happened.

Tanks :)

I can download the frimware which is provided by the AVR studio6

and I got this

It seemed like working well...

YangWang92 commented 9 years ago

There must be something wrong. When I open VMware and run a virtual machine(ubuntu 14.04), I found the hardware is working, I test it many times..... It's wired.... I guess there is something wrong in the USB driver......

YangWang92 commented 9 years ago

I think I solve problem when I used the newest firmware.... There are something promblems on my hardware.....

But, I can't use the CDC device in VMware....

And is there more examples about the command line and how to debug the circuit..... I think we need more information about board.....

david-oswald commented 9 years ago

Yes, you for sure need the newest FW - the older one contained a bug that caused the Chameleon to fail with newer Flash chips (actually this error should have also affected older Flash, but it seemed more tolerant). Anyway, this is fixed in the new FW - was there any reason why you used an older version?

Re VMWare: Have not tried, any reason why you need this? Also, wasn't VMware working before (and now stopped)? Strange bug, if you find out anything pls let us know.

Re command line: Have you seen this page: https://htmlpreview.github.io/?https://raw.githubusercontent.com/emsec/ChameleonMini/master/Doc/Doxygen/html/_page__command_line.html

theforcedk commented 9 years ago

In order to use USB's in virtualized environments, you usually have to add filters to ensure that the USB is grabbed by the guest OS before the host OS when plugged in, otherwise you'll get stability issues and the USB will connect/disconnect/connect/disconnect. For VirtualBox, this works with ChameleonMini: http://www.atmel.com/webdoc/atmelstudio/atmelstudio.faq.virtualbox.html