Activating the USB MSC bootloader in my application

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Hi, I'm trying to allow field upgrades in my AVR UC3 application through a USB MSC port.  I have access to the AVR32758 application note, but I need clarification on how to get the USB MSC bootloader included:

 

At what stage of the build and deploy process does the USB MSC bootloader get "included"?

 

  • during the build of the HEX file: if so, what changes do I need to make to my Atmel Studio project?
  • during the batch_isp programming of the HEX file: if so, what changes do I need to make to the batch_isp command?
  • during the conversion of the HEX file to the UC3 file: if so, what changes do I need to make to my script that invokes srec_cat?

 

Thanks, Dave