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
- MMU supports all three
- Only CAN firmware and USB firmware are provided here
Enter flashing mode
tip
The top is the RESET button
, the bottom is the BOOT button
- There are two ways to enter flashing mode
- First method: With the mainboard completely powered off, press the BOOT button and connect one end of a data cable with data transfer to the mainboard and the other end to your device
- Second method: After connecting one end of a data cable with data transfer to the mainboard and the other end to your device, press the BOOT key and then press the RST key, then release the RST key and finally release the BOOT key
Flashing firmware
- Windows flashing tutorial
- Host computer flashing tutorial
- MMU's Katapult firmware Click to automatically download firmware
Notice
- System compatibility issues, please use the computer's
USB2.0
for burning - If it still cannot be burned, please use the host machine for burning
- Burning tool Download link
- Need to download
SetupSTM32CubeProgrammer
andSTM32 DFU driver
- Copy the firmware (klipper.bin) compiled in front or the precompiled
Katapult firmware
to any directory on the computer - Use a Type-C data cable to connect the motherboard to the computer, make sure it is already:Enter DFU burning mode
- In STM32CubeProgrammer, select USB mode, refresh, and connect
- If no error pop-up appears, then the connection is successful.
Warning
If the content shown below appears, it indicates a problem with the computer or software, please use the host machine for burning:Host machine burning tutorial
- Click the download icon on the left and select several options below
- Click the
Browse
button indicated by the arrow, then select the firmware you need to burn - Select
Start address
and enter0x08000000
- Click
Start automatic mode
below to start burning the firmware - The prompt below indicates that the firmware burning 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 firmware
tip
Only one of the firmwares needs to be flashed
-
The following is the firmware flashing command for 500K CAN speed
sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/MMU/FLY_MMU_CANBOOT_CAN_500K.bin
-
The following is the firmware flashing command for 1M CAN speed
sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/MMU/FLY_MMU_CANBOOT_CAN_500K.bin
-
The following is the firmware flashing command for USB
sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/MMU/FLY_MMU_CANBOOT_USB.bin
-
If the content shown in the arrow in the following figure appears
File downloaded successfully
, the flashing is successful
tip
After the firmware is flashed, the mainboard needs to be completely powered off once.
Confirm if the firmware is running
- If the firmware starts normally, the LED will blink