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UpdateHDKLinux.md

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Updating the HDK firmware from Linux

This will describe the process to update the HDK firmware from CLI in Linux. This guide expects a certain familiarity with Linux and comfort with CLI usage.

Note: This process has some risk associated with it. If instructions are not entered properly it may result in bricking the device.

Requirements

  • dfu-programmer - version 0.72 or newer: if your distribution does not include a suitable version, you can build the master branch.
  • screen - Included in many base installs
  • sha1sum - Included in many base installs

Checking the current firmware version

Use screen to connect to the HDK device. It may not be on exactly /dev/ttyACM0 depending on your system.

Note: Remember to run this with root privileges(sudo or root shell).

screen /dev/ttyACM0

Once connected you should have a blank screen with the terminal cursor flashing in the upper left corner.

Enter the following exactly and press enter to execute (the '#' symbol is NOT a prompt):

#?v

It will show you your current firmware version, as well as the onboard tracker version (non-upgradeable).

To exit the screen session:

  1. Press ctrl+a
  2. Then shift+k
  3. It will prompt for y/n to quit, select 'y'

Download and Verify the New Firmware

See the firmware page for the latest version and checksum of firmware. Note that different firmwares apply for different versions of the HDK, so choose carefully.

Note: Do not use a file if the checksum does not match.

Verify the checksum of the file (replace firmware.hex with the name of the file you downloaded) for SHA-1 hash:

sha1sum firmware.hex
3d7f8ac7412fb9f8c11ae082c4c27e550dad8012 firmware.hex

or for SHA-256 hash

sha256sum firmware.hex
36c7eb20dec518c400b8cd8eda0189c9c1622be05c4fb87ced2359f9667593a0 firmware.hex

Updating Firmware

Note: All commands in this section require root privileges.

I recommend you watch dmesg or use journalctl -f in a separate terminal to see activity of the device attaching and changing state.

Put the HDK MCU into bootloader mode

Use screen to connect to the HDK (substituting the correct device path as needed)

screen /dev/ttyACM0

Enter the following exactly and press enter to execute:

#?B1948

Note: The screen session should exit, this is expected as the device is rebooting into bootloader mode.

Uploading the new firmware

With the HDK MCU in bootloader mode (After the usb activity in the logs stops) the new firmware can be uploaded.

Use the dfu-programmer utility to upload the new firmware (replace 'firmware.hex' with the name of the file that was downloaded earlier):

dfu-programmer atxmega256a3bu flash --force --suppress-bootloader-mem firmware.hex

Reboot the HDK MCU to normal operation using the new firmware:

dfu-programmer atxmega256a3bu launch

Note: The device should again disconnect and reconnect. The device is ready to use once the logs stop.