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HDKBootloader.md

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#Preparing HDK2 board to enter bootloader mode

This guide is useful in case the HDK is completely unresponsive, does not appears as a USB device and there is a desire to re-flash its bootloader so that new application software can be loaded

Step 1: Connect programmer to HDK2 board

Connect progammer such as Atmel JTAGIce3 to the programming port on the HDK board.

Step 2: Prepare for bootloader programming

  • Enter device programming dialog (enter through Tools/Device Programming) in Atmel Studio
  • Select “Interface settings”
  • Select tool and JTAG interface.
  • Select “ATxmega256A3BU” as device
  • Click “Apply”
  • Click “Read” in the “device signature” area. If interface is connected correctly and board is powered on, the device signature will appear

Step 3: Program bootloader

  • Enter ‘Memories’ tab
  • Select bootloader file (atxmega256a3bu_104.hex) which you can obtain from the "AVR1916: USB DFU Boot Loader for Atmel XMEGA" application note here
  • Click program

The HDK will now be ready for regular firmware update using the OSVR Control tool