BL Firmware

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Please note the bootloader has been pre-flashed at the factory, no need to re-flash

Enter Flash Mode

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The BOOT button is on the right and the RESET button is on the left

There are two ways to enter flash mode
First: With the tool fully powered off, press and hold the BOOT button, then connect one end of a data-capable TYPE-C cable to the mainboard and the other end to your device
Second: After connecting one end of a data-capable TYPE-C cable to the mainboard and the other end to your device, press and hold the BOOT button, then press the RST button, release the RST button first, and finally release the BOOT button
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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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Programming Tool Download Link
Download SetupSTM32CubeProgrammer and the STM32 DFU Driver.
Download the firmware to any directory on your computer.
Connect the mainboard to the computer using a Type-C cable. Ensure it has entered DFU programming mode.
In STM32CubeProgrammer, select USB mode, refresh, and connect.
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If no error pop-up appears, the connection is successful.
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Click the download icon on the left and select the options shown below.
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Click Browse as indicated by the arrow, then select the firmware you need to program.
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For Start address, enter 0x08000000.
- Note: If the firmware is in HEX format, please skip this step!!
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Click Start automatic mode below to begin programming the firmware.
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The prompt below indicates that the firmware programming is complete.
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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

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.

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.

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

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

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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Only one of the firmware files needs to be flashed

Below are the firmware flashing commands

sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/E3/E3_V2.bin

If the content shown at the arrow in the image below says File downloaded successfully, the flashing was successful
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After flashing, the mainboard needs to be completely powered off once.