Katapult Firmware
Katapult Firmware Description
tip
Katapult was originally named CanBoot, and later renamed to katapult.
- Katapult firmware is a type of bootloader that can be used in conjunction with Klipper. After burning the firmware using methods like DFU, you can use commands to update the firmware with one click.
- Advantage: Quickly double-clicking the reset button or quickly cutting power twice will enter the Katapult firmware, at which point there will be an LED flashing on the mainboard.
- Katapult firmware can only be used to burn firmware and cannot connect to Klipper!!!
- Katapult firmware supports three connection methods for connecting to the host computer, and the firmwares for these three methods are independent of each other.
- CAN connection
- Advantage: After compiling the KLIPPER firmware, you can directly update the firmware using a command, and it has strong interference resistance.
- Disadvantage: You need to know the firmware compilation rate in advance.
- RS232 connection
- Advantage: After compiling the KLIPPER firmware, you can update the firmware using a command, and it has very strong interference resistance.
- Disadvantage: You cannot use a command to update the firmware with one click; you need to manually enter the Katapult firmware.
- USB connection
- Advantage: After compiling the KLIPPER firmware, you can directly update the firmware using a command.
- Disadvantage: A long data cable is prone to interference, which may lead to disconnection.
- CAN connection
tip
- The Katapult firmware for D7 uses the third connection method: USB connection
- D7 units manufactured after September 1, 2024 come pre-flashed with Katapult firmware
Entering DFU Flash Mode
tip
The left button is the BOOT button
, and the right button is the RESET button
.
- There are two ways to enter flash mode
- First method: With the tool board completely powered off, press and hold the BOOT button, then connect one end of a data-transfer-capable Type-C cable to the mainboard and the other end to your device
- Second method: After connecting one end of a data-transfer-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
Flashing Firmware
- Windows Flash Tutorial
- Host Flash Tutorial
- Katapult firmware for D7
- Click the download link below
-
Loading...
Notice
USB3.0
may fail to flash, please try to use the computer'sUSB2.0
for flashing- If flashing still fails, please try using a host computer for flashing
- If the error below occurs, please use a USB hub
- Flashing tool Download link
- Please download
SetupSTM32CubeProgrammer
andSTM32 DFU driver
- Copy the previously compiled firmware
klipper.bin
,Katapult
, orMarlin
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 content shown in the figure below appears, it indicates a computer or software issue. Please use a host computer for flashing: Host Computer Flashing Tutorial
- Click the download icon on the left and check the options below
- Click the
Browse
button as indicated by the arrow, then select the firmware you need to flash - Enter
0x08000000
in theStart address
field- Please note that if the firmware is in
HEX
format, skip this step!!
- Please note that if the firmware is in
- Click
Start automatic mode
below to begin flashing the firmware - If the prompt shown below appears, the firmware flashing is complete
- Install the burning tool
- No need to install the burning tool for the FLY upper computer
- If you need to install, please note: The upper computer needs to be connected to the internet to install normally
- If already installed, no need to install
sudo apt update
sudo apt install dfu-util -y
- Execute the following command to check if the connection is successful.
lsusb
- If there is no DFU device, please try to re-enter burning mode
- Due to system version issues, other names may be displayed. If
0483:df11
is shown, it indicates that the burning mode has been entered

- Pull the pre-compiled firmware
- These are all pre-compiled firmwares
- Please note: The upper computer needs to be connected to the internet to install
- The upper computer needs to execute the command below to download the firmware package (if unable to get the file due to network issues on the upper computer, please contact the administrator in the after-sales group)
cd && git clone https://github.com/FengHua741/FLY_Katapult.git
- If the firmware package has already been downloaded, it is recommended to update the firmware package before proceeding with the remaining operations
cd ~/FLY_Katapult && git pull
- Flashing the firmware
tip
Only one of the provided 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/D/FLY_D7.bin
-
If the message
File downloaded successfully
appears as shown in the arrow in the image below, then the flashing was successful
tip
After flashing, the board must be fully powered off once.
Loading...