BL Firmware

Tip

Please note that the bootloader is pre-flashed at the factory, no need to flash again.

Entering Flash Mode

There are two methods to enter flash mode:
Method 1: With the motherboard completely powered off, short BOOT and BOOT1, then connect one end of a data cable (with data transfer capability) to the motherboard and the other end to your device.
Method 2: After connecting one end of a data cable to the motherboard and the other end to your device, short BOOT and BOOT1, press the RST button, release the RST button, and finally disconnect the short on the BOOT jumper.
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FLY-Firmware/MainBoard/Gemini

Set DIP switches 3 and 4 to the right to connect the MCU and host via built-in USB.
Set DIP switches 1 and 2 to the left, otherwise it will affect the connection between the MCU and the host.
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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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Flashing tool Download Link
You need to download SetupSTM32CubeProgrammer and STM32 DFU Driver
Download the firmware to any directory on your computer
Connect the motherboard to the computer using a Type-C cable, ensuring it has entered dfu flashing mode
In STM32CubeProgrammer, select USB mode, refresh, and connect
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If no error popup appears, the connection is successful.
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Click the download icon on the left and check the following options
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Click Browse as indicated by the arrow, then select the firmware you need to flash
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Set Start address to 0x08000000
- Note: If the firmware is in HEX format, please skip this step!!
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Click Start automatic mode below to begin flashing the firmware
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The following prompt indicates that the firmware flashing is complete
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Set DIP switches 1 and 2 to the right to connect the MCU and host via built-in USB.
Set DIP switches 3 and 4 to the left, otherwise it will affect the connection between the MCU and the host.
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After setting the DIP switches according to this method, the lower USB port will be occupied by the MCU. Please do not connect other devices.
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This step is not required for FLY host computers.
If installation is needed, ensure the host computer is connected to the internet.
If the flashing tool has already been installed, this step can be skipped.

sudo apt update
sudo apt install dfu-util -y

Execute 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 may differ. As long as 0483:df11 appears, it indicates successful entry into flashing mode.

Below are the precompiled firmware files. Please select the corresponding command to download based on your system type (ensure the host computer has internet access).

For standard systems:

cd && git clone https://cnb.cool/3dmellow/FLY-Firmware.git 

For FLY host computers:

git clone https://cnb.cool/3dmellow/FLY-Firmware.git /data/FLY-Firmware
ln -s /data/FLY-Firmware /root/FLY-Firmware

If the firmware package has already been downloaded, it is recommended to update it to the latest version before proceeding:
```
cd ~/FLY-Firmware && git pull
```

The previous repository is no longer maintained. If you need to delete it, execute:
```
rm -rf ~/FLY_Katapult /root/FLY_Katapult
```

Tip

Only one of the firmware files needs to be flashed.

Below is the bootloader firmware flash command:

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

If the message File downloaded successfully appears as shown in the image below, the flashing was successful.

Caution

Please ignore any errors indicated by the red arrow in the line below!!!

Tip

After flashing is complete, completely power off the motherboard once.