Katapult Firmware

Katapult Firmware Description

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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.

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• All three MMU types are supported.
• Only CAN firmware and USB firmware are provided here.

Entering Flash Mode

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

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

• Windows Flashing Tutorial
• Host PC Flashing Tutorial

• Katapult firmware for MMU
  • Click the download link below.
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Important Notice

To ensure successful STM32 programming, please pay attention to the following:

• Some computer USB ports may experience unstable programming due to driver or signal compatibility issues. It is recommended to try connecting to a different USB port.
• If changing ports does not help, an effective solution is to connect via an external USB hub, which often improves compatibility.
• When the programming software reports the error message shown below, also try using a hub first. If the issue persists, please check or use the host computer for programming.
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1. Programming Tool Download Link
2. Download SetupSTM32CubeProgrammer and the STM32 DFU Driver.
3. Download the firmware to any directory on your computer.
4. Connect the mainboard to the computer using a Type-C cable. Ensure it has entered DFU programming mode.
5. In STM32CubeProgrammer, select USB mode, refresh, and connect.
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6. If no error pop-up appears, the connection is successful.
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7. Click the download icon on the left and select the options shown below.
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8. Click Browse as indicated by the arrow, then select the firmware you need to program.
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9. For Start address, enter 0x08000000.
   • Note: If the firmware is in HEX format, please skip this step!!
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10. Click Start automatic mode below to begin programming the firmware.
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11. The prompt below indicates that the firmware programming is complete.
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1. Install the flashing tool

• This step is not required for FLY host software.
• If installation is needed, ensure the host computer is connected to the internet.
• If the flashing tool has already been installed, you may skip this step.

sudo apt update
sudo apt install dfu-util -y

2. Check device connection status

• Run the following command to confirm whether the device is successfully connected:

lsusb

• If the DFU device is not recognized, try re-entering flashing mode.
• In some system versions, the device name might differ; as long as 0483:df11 appears, it indicates the device has successfully entered flashing mode.

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3. Obtain the pre-compiled firmware

• Below are pre-compiled firmware files. Please choose the corresponding command based on your system type to download (ensure the host computer can access the internet). If download fails due to network issues, please contact the after-sales group administrator for assistance.

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• FlyOS-Armbian or Standard System
• FlyOS-FAST System

cd && git clone https://github.com/FengHua741/FLY_Katapult.git

git clone https://github.com/FengHua741/FLY_Katapult.git /data/FLY_Katapult 
ln -s /data/FLY_Katapult /root/FLY_Katapult

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• If you have previously downloaded the firmware package, it is recommended to update to the latest version before proceeding:

cd ~/FLY_Katapult && git pull

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4. Flash the firmware

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You only need to flash one of the firmware files.

• Below is the command to flash the firmware for 500K CAN baud rate.

  sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/MMU/FLY_MMU_CANBOOT_CAN_500K.bin

• Below is the command to flash the firmware for 1M CAN baud rate.

  sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/MMU/FLY_MMU_CANBOOT_CAN_1M.bin

• Below is the command to flash the USB firmware.

  sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/BL/MMU/FLY_MMU_CANBOOT_USB.bin

5. If the content shown by the arrow in the image below, File downloaded successfully, appears, the flashing is successful.

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After flashing is complete, you need to completely power off the mainboard once.

Verify Firmware Startup

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