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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
  • ERCF supports CAN and USB
  • CAN firmware is provided with 500K and 1M rates

Entering Flash Mode​

Tip

The circled part is the BOOT button

  • To enter flash mode, completely power off the motherboard, hold the BOOT button, then connect a TYPE-C cable capable of data transfer, one end to the motherboard and the other to the host computer.
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Flashing Firmware​

  • ERCF 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/ERCF
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4. Flash Firmware

:::tip

Only one firmware needs to be flashed

:::

* Below is the flash command for 500K CAN rate firmware
    ```bash
    sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/ERCF/FLY_ERCF_CANBOOT_CAN_500K.uf2
  • Below is the flash command for 1M CAN rate firmware 
    sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/ERCF/FLY_ERCF_CANBOOT_CAN_1M.uf2
  • Below is the flash command for USB firmware 
    sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/ERCF/FLY_ERCF_CANBOOT_USB.uf2

  1. The following prompt indicates successful flashing

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Tip

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

Confirm Firmware Startup​

  • If the firmware starts normally, the LED will blink
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