Fly Gemini OEM bootloader
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Install the DFU jumpers

  • Install the boot0 and boot1 jumpers as shown.

    Install boot0 and boot1 jumpers
    Install boot0 and boot1 jumpers

Upload the HID Bootloader

  • power on the Fly-Gemini V3
  • Download the hid_bootloader.bin file from the Mellow github.
  • Use an FTP client to upload the hid_bootloader.bin file to the Fly home folder /home/fly/ on the Gemini V3 klipper host.

Flash the bootloader

  • Using Putty open an SSH session to the Fly-Gemini V3

  • Run lsusb to see if the connection is successful, Verify the USB ID indicated DFU mode. If the MCU is not in DFU press the reset button a few times and run again. If that fails verify the DFU jumpers are installed correctly.

    Run lsusb
    Run lsusb
  • Erase and Burn the firmware.
     sudo dfu-util -a 0 -D /home/fly/hid_bootloader.bin --dfuse-address 0x08000000:force:mass-erase:leave -d 0483:df11
  • Wait for the flash to complete. This can take a minute or two.

  • If successfull shut down the Fly-Gemini V3
  • Remove the bootO jumper and boot1 jumper.

  • Continue on to flashing the MCU for USB to CAN bridge mode or USB