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BL Firmware

Tip
  • Please note that the factory has already pre-flashed the bootloader, so there is no need to flash it again.
  • For regular firmware updates, please prioritize using the USB firmware or USB bridge CAN firmware pages. Do not repeatedly flash the BL firmware.

Entering Flash Mode​

Power Off Operation

Before starting, completely shut down the printer and disconnect the power supply. Do not plug or unplug wiring harnesses, organize interface wiring sequences, or touch terminals while the device is powered.

  • There are two methods to enter flash mode.
  • First method: With the motherboard completely powered off, use a jumper cap to connect BOOT and BOOT1, then connect one end of a data-capable cable to the motherboard and the other end to the computer.
  • The second method involves reset timing, which is not recommended for ordinary users to perform on their own. If after-sales support requires this method, please follow the steps provided by after-sales support.
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Flashing Firmware​

  • Gemini bootloader firmware.
  • You can obtain the firmware via the following link:
  • The firmware is located at
FLY-Firmware/MainBoard/Gemini
  • Turn DIP switches 3 and 4 ON, and connect the lower computer USB to the onboard Type-C port.
  • Turn DIP switches 1 and 2 OFF, otherwise it will affect the connection between the lower computer and the computer.
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Notice

To ensure successful STM32 flashing, please note the following:

  • The USB port on some computers may cause unstable flashing due to driver or signal compatibility issues. It is recommended to try a different USB port for connection.
  • If changing ports does not work, an effective solution is to connect via an external USB hub, which often improves compatibility.
  • When the flashing software reports the error shown below, please also prioritize trying a USB hub. If the issue persists, check or use the host computer for flashing.
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  1. Flashing tool Download Link
  2. You need to download SetupSTM32CubeProgrammer and STM32 DFU Driver
  3. Download the firmware to any directory on your computer
  4. Connect the motherboard to the computer using a Type-C cable, ensuring it has entered dfu flashing mode
  5. In STM32CubeProgrammer, select USB mode, refresh, and connect
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  6. If no error popup appears, the connection is successful.
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  7. Click the download icon on the left and check the following options
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  8. Click Browse as indicated by the arrow, then select the firmware you need to flash
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  9. Set Start address to 0x08000000
    • Note: If the firmware is in HEX format, please skip this step!!
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  10. Click Start automatic mode below to begin flashing the firmware
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  11. The following prompt indicates that the firmware flashing is complete
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