Katapult Firmware

Katapult Firmware Description

Name Explanation

Katapult was formerly known as CanBoot, and both names may appear simultaneously in older tutorials or firmware names.

Katapult is a bootloader used to boot and update Klipper:

• Katapult itself cannot be used as a Klipper MCU; after flashing, you still need to write Klipper firmware that matches the hardware and communication method.
• Supported tool boards can enter Katapult by quickly double-pressing the RESET button; after entering, there is usually a status light blinking.
• CAN, RS232, and USB use independent Katapult firmware; you cannot simply modify file names or mix them directly.
• For CAN firmware, you must also select the correct bus speed, with common speeds being 500K and 1M.

Tip

• TOOL-LITE supports CAN
• Only 1M CAN firmware is provided here

Entering Flash Mode

Tip

The circled item is the BOOT button

• To enter flash mode, power off the mainboard completely, hold the BOOT button, and connect one end of a data-capable cable to the mainboard and the other end to the host machine
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Flashing Firmware

• Windows Flashing Tutorial
• Host Machine Flashing Tutorial

• TOOL-LITE-CAN Katapult firmware
• You can obtain the firmware via the following link:

• FLY_TOOL-LITE_CANBOOT_CAN_1M.uf2

Windows 默认可能隐藏文件扩展名。下载后请确认文件扩展名未被修改，不要保存成 .txt 或其他扩展名。

• Firmware location:

FLY-Firmware/ToolBoard/TOOL-LITE

1. Confirm that the tool board has entered UF2 flashing mode, and a removable disk named RPI-RP2 appears on your computer.

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2. Release the BOOT button or remove the BOOT jumper.

Windows File Extension Display

Windows may hide file extensions. Please check "File name extensions" in File Explorer and ensure you are using the .uf2 firmware; do not modify the firmware file extension.

3. Copy the .uf2 firmware to be flashed to the RPI-RP2 disk.

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4. After the firmware write is complete, the RPI-RP2 disk will automatically disappear, indicating that the UF2 firmware has been successfully flashed.

1. Compile the RP2040 flashing tool. You can skip this step if it has already been done.

cd ~/klipper/lib/rp2040_flash/
make

2. Confirm that the toolboard has entered UF2 flashing mode.

lsusb

If 2e8a:0003 appears in the output, it indicates that the device has entered RP2040 flashing mode. The device name displayed may vary across different systems, so the USB ID should be used as the reference.

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Device Not Detected

Do not proceed with flashing if 2e8a:0003 does not appear. Please disconnect the toolboard power and repeat the steps in the "Entering Flashing Mode" section on this page.

3. Pull or update the precompiled firmware repository.

• Linux
• FLYOS

First-time download:

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

Update the repository if it has already been downloaded:

git -C ~/FLY-Firmware pull --ff-only

First-time download:

git clone https://cnb.cool/3dmellow/FLY-Firmware.git /data/FLY-Firmware
ln -s /data/FLY-Firmware /root/FLY-Firmware

Update the repository if it has already been downloaded:

git -C /data/FLY-Firmware pull --ff-only

4. Flash the firmware

Tip

Only one firmware needs to be flashed

• Below is the firmware flashing command for 1M CAN baud rate

  sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/TOOL-LITE/FLY_TOOL-LITE_CANBOOT_CAN_1M.uf2

5. The flashing is successful when the following prompt appears

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Tip

After flashing, the mainboard needs to be fully powered off once.

Confirming Firmware Startup

• If the firmware starts normally, the LED will begin blinking
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