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dfu-programmer is a Device Firmware Update based USB programmer for
Atmel chips with a USB bootloader.
It seems to be working just fine with the LUFA based DFU Bootloader.
(http://www.fourwalledcubicle.com/LUFA.php).
You might want to add the following udev rule under /etc/udev/rules.d:
SUBSYSTEM=="usb",ACTION=="add",ATTRS{idVendor}=="03eb",ATTRS{idProduct}=="2ff4",GROUP="plugdev"
so when you plug the AVR chip to program, the USB devices becomes
available to all the members of the "plugdev" group. Also, I found
that the programmer doesn't work for non-root users when the
"usbfs" is mounted on /proc/bus/usb, so my advice is to remove the
"usbfs" entry from /etc/fstab if it is there (or maybe there is a
better solution).
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