Skip to main content

Katapult Firmware

Katapult Firmware Description​

Tip

Katapult was originally named CanBoot and later renamed to katapult.

  • The Katapult firmware is a type of bootloader that can be used together with Klipper. After flashing via DFU or other methods, firmware can be updated with a single command.
  • Advantages: Quickly double-click the reset button or power cycle twice to enter the Katapult firmware, at which point the LED on the motherboard will blink.
  • Katapult firmware can only be used to flash firmware and cannot connect to Klipper!!!
  • Katapult firmware supports three ways to connect to the host computer, and the firmware for each method is independent.
    • CAN connection
      • Advantages: After compiling the Klipper firmware, it can be updated directly using commands, with strong anti-interference capability.
      • Disadvantages: The firmware compilation speed needs to be known in advance.
    • RS232 connection
      • Advantages: After compiling the Klipper firmware, it can be updated using commands, with very strong anti-interference capability.
      • Disadvantages: Firmware cannot be updated with a single command; manual entry into Katapult firmware is required.
    • USB connection
      • Advantages: After compiling the Klipper firmware, it can be updated directly using commands.
      • Disadvantages: Long data cables are prone to interference, which may cause disconnection.
Tip
  • All three MMU types are supported
  • Only CAN firmware and USB firmware are provided here

Entering Flash Mode​

Tip

The top is the RESET button, the bottom is the BOOT button

  • There are two ways to enter flash mode
  • Method 1: With the tool board completely powered off, hold the BOOT button and connect one end of the TYPE-C cable (with data transfer capability) to the motherboard and the other end to your device
  • Method 2: After connecting the TYPE-C cable (with data transfer capability) to the motherboard and your device, hold the BOOT button, then press the RST button, release the RST button, and finally release the BOOT button
    Loading...

Flashing Firmware​

  • MMU Katapult firmware
  • You can obtain the firmware via the following link:
Please note

The zip archive must be extracted before use.

  • Alternatively, download the complete repository via git (ensure the host machine has internet access):

  • For general systems

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

  • For FLY host machine

    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 to the latest version before proceeding:

    cd ~/FLY-Firmware && git pull
  • The previous repository is no longer maintained. To delete it, execute: 
    rm -rf ~/FLY_Katapult /root/FLY_Katapult
  • The firmware is located at
FLY-Firmware/ToolBoard/MMU
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.
    Loading...
  1. Flashing tool Download Link
  2. You need to download SetupSTM32CubeProgrammer and STM32 DFU Driver
  3. Download the firmware to any directory on your computer
  4. Connect the motherboard to the computer using a Type-C cable, ensuring it has entered dfu flashing mode
  5. In STM32CubeProgrammer, select USB mode, refresh, and connect
    Loading...
  6. If no error popup appears, the connection is successful.
    Loading...
  7. Click the download icon on the left and check the following options
    Loading...
  8. Click Browse as indicated by the arrow, then select the firmware you need to flash
    Loading...
  9. Set Start address to 0x08000000
    • Note: If the firmware is in HEX format, please skip this step!!
    Loading...
  10. Click Start automatic mode below to begin flashing the firmware
    Loading...
  11. The following prompt indicates that the firmware flashing is complete
    Loading...

Confirming Firmware Startup​

  • If the firmware starts normally, the LED will blink
    Loading...
Loading...