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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
  • SB2040_V3 supports CAN and RS232
  • Only CAN firmware is provided here, with rates of 500K and 1M

Entering Flash Mode​

Tip

The left side is the RESET button, and the right side is the BOOT button

  • There are two methods to enter flash mode
  • First: With the tool board completely powered off, hold the BOOT button and connect a TYPE-C cable with data transmission capability from the motherboard to your device
  • Second: After connecting the TYPE-C cable with data transmission capability from the motherboard to your device, hold the BOOT button, press the RST button, then release the RST button, and finally release the BOOT button
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Flashing Firmware​

  • SB2040 V3 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
  • Firmware location is at
FLY-Firmware/ToolBoard/SB2040
  • Prepare a data cable with data transmission functionality
  • Download the firmware to the computer
  • Connect the BOOT jumper, or press and hold the BOOT button while connecting to the computer, then the RPI-RP2 disk will appear
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  • Remove the BOOT jumper or release the button!!!
  • Copy the firmware to be flashed into it. Please note that only firmware with the UF2 file extension can be used!!! (Do not modify the file extension; it is ineffective)
  • Reference
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  • After copying the firmware, the RPI-RP2 disk will disappear automatically, indicating that the firmware flashing is complete!

Confirm Firmware Startup​

  • If the firmware starts normally, the LED will blink
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