Bootloader Firmware

Entering Flash Mode

tip

The button on the right is the BOOT button, and the one on the left is the RESET button.

There are two ways to enter flash mode:
First: With the board completely powered off, hold down the BOOT button and 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, hold down the BOOT button, then press and release the RST button, and finally release the BOOT button.

Notice

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

Some computers' USB ports may cause unstable flashing due to driver or signal compatibility issues. We recommend that you try connecting using a different USB port.
If changing ports doesn't help, an effective solution is to connect via an external USB hub, which often improves compatibility.
When the flashing software displays the error message below, try using a hub first. If the problem persists, please check or use the host computer to flash

Flashing tool Download link
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, then refresh and connect
If no error pop-up appears, the connection is successful.
Warning
If the following message appears, it indicates a computer or software issue. Please use the host computer to flash: Host Computer Flashing Guide
Click the download icon on the left and select the options below
Click Browse at the arrow's location, then select the firmware you need to flash
Select Start address and enter 0x08000000
- Note: If the firmware is in HEX format, skip this step!!
Click Start automatic mode below to begin flashing the firmware
The appearance of the message below indicates that the firmware has been successfully flashed

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

tip

Only one of the following firmware files needs to be flashed.

Below are the commands for flashing the firmware:

sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/CDY/CDYV3_V2.bin

If you see the message File downloaded successfully as indicated in the image below, the flashing was successful.

tip

After flashing, you need to completely power off the mainboard once.