Looks like someone just provided a patch for 32u2 to the dfu-programmer-user list.
On Feb 11, 2010, at 13:34:19, Don Delmar Davis wrote:
> Schmidt's dfu-progammer (http://dfu-programmer.sourceforge.net/)
> works well with the atmels on everything from panther to leopard, however, you do need to have libusb installed.
> Also the latest does not support the 32u2 family of chips yet. Its a simple patch but its not there yet.
> On Tue, 9 Feb 2010, email@hidden wrote:
>> I have a controller that has atmel chip in it I have to write a firmare
>> upgrade program that can flash hex file onto the chip
>> I notice that there is dfu-programmer for linux and the documentation
>> says it works for Mac also...
>> I am getting linking errors when I do that
>> Can anyone point me to a good dfu programming sample for Mac
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