BL Firmware

tip

• Please note that the bootloader is pre-flashed at the factory and does not need to be re-flashed.

Entering Flash Mode

• There are two methods to enter flash mode.
• First: With the motherboard completely powered off, short the BOOT and BOOT1 pins, then connect a data cable (capable of data transfer) between the motherboard and your device.
• Second: After connecting a data cable (capable of data transfer) between the motherboard and your device, short the BOOT and BOOT1 pins, then press the RST key. Release the RST key, and finally disconnect the BOOT jumper short.
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Flashing Firmware

Windows Flashing Tutorial

• Gemini bootloader firmware

  • Click the download link below.
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• Set DIP switches 3 and 4 to the right side to connect the lower computer to the upper computer via the built-in USB.

• Set DIP switches 1 and 2 to the left side, otherwise it will affect the connection between the lower computer and the upper computer.

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Important Notice

To ensure successful STM32 programming, please pay attention to the following:

• Some computer USB ports may experience unstable programming due to driver or signal compatibility issues. It is recommended to try connecting to a different USB port.
• If changing ports does not help, an effective solution is to connect via an external USB hub, which often improves compatibility.
• When the programming software reports the error message shown below, also try using a hub first. If the issue persists, please check or use the host computer for programming.
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1. Programming Tool Download Link
2. Download SetupSTM32CubeProgrammer and the STM32 DFU Driver.
3. Download the firmware to any directory on your computer.
4. Connect the mainboard to the computer using a Type-C cable. Ensure it has entered DFU programming mode.
5. In STM32CubeProgrammer, select USB mode, refresh, and connect.
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6. If no error pop-up appears, the connection is successful.
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7. Click the download icon on the left and select the options shown below.
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8. Click Browse as indicated by the arrow, then select the firmware you need to program.
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9. For Start address, enter 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 programming the firmware.
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11. The prompt below indicates that the firmware programming is complete.
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Upper Computer Flashing Tutorial

• Set DIP switches 1 and 2 to the right side to connect the lower computer to the upper computer via the built-in USB.
• Set DIP switches 3 and 4 to the left side, otherwise it will affect the connection between the lower computer and the upper computer.
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• After setting the DIP switches according to this method, the USB port below will be occupied by the lower computer. Please do not connect other devices to it.
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1. Install the flashing tool

• This step is not required for FLY host software.
• If installation is needed, ensure the host computer is connected to the internet.
• If the flashing tool has already been installed, you may skip this step.

sudo apt update
sudo apt install dfu-util -y

2. Check device connection status

• Run the following command to confirm whether the device is successfully connected:

lsusb

• If the DFU device is not recognized, try re-entering flashing mode.
• In some system versions, the device name might differ; as long as 0483:df11 appears, it indicates the device has successfully entered flashing mode.

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3. Obtain the pre-compiled firmware

• Below are pre-compiled firmware files. Please choose the corresponding command based on your system type to download (ensure the host computer can access the internet). If download fails due to network issues, please contact the after-sales group administrator for assistance.

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FlyOS-Armbian or Standard System

cd && git clone https://github.com/FengHua741/FLY_Katapult.git

FlyOS-FAST System

git clone https://github.com/FengHua741/FLY_Katapult.git /data/FLY_Katapult 
ln -s /data/FLY_Katapult /root/FLY_Katapult

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• If you have previously downloaded the firmware package, it is recommended to update to the latest version before proceeding:

cd ~/FLY_Katapult && git pull

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4. Flash the firmware

tip

Only one firmware needs to be flashed.

• Below is the command to flash the bootloader firmware.

  sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/Gemini/GeminiV3.bin

5. If the content shown by the arrow in the image below, File downloaded successfully, appears, the flashing was successful.

warning

Please ignore any errors following the line indicated by the red arrow!!!

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tip

After flashing is complete, the motherboard needs to be completely powered off once.