Katapult Firmware

Katapult Firmware Description

tip

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.

tip

• SB2040_V3 supports CAN and RS232
• Only CAN firmware with 500K and 1M baud rates are provided here

Entering Flash Mode

tip

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

• There are two ways to enter flash mode
• First method: With the toolboard completely powered off, press and hold the BOOT button, then connect one end of a data-capable TYPE-C cable to the mainboard and the other end to your device
• Second method: After connecting one end of a data-capable TYPE-C cable to the mainboard and the other end to your device, press and hold the BOOT button, then press the RST button, release the RST button first, and finally release the BOOT button
  

Flashing Firmware

Windows Flashing Guide

• Katapult firmware for SB2040 V3
  • Click on the download link below
  • Loading...

• Prepare a data cable with data transfer capabilities.
• Download the firmware to the computer.
• Connect the BOOT jumper or hold it and connect it to the computer, at this point the RPI-RP2 disk will appear.
• Remove the BOOT jumper or release the button!!!
• Copy the firmware that needs to be burned into it, please note that only UF2 suffix firmware can be used!!! (Do not modify the suffix name, it is useless.)
• Refer to
• After copying the firmware into the RPI-RP2 disk, it will automatically disappear, indicating that the firmware burning is complete!

Host Flashing Guide

1. Install the flashing tool

   • Enter the following command in SSH
   • Only need to execute it for the first flash, no need to execute again later

   cd ~/klipper/lib/rp2040_flash/ && make

2. Execute the following command to check if the connection is successful.

   • Enter lsusb

   • If there is no 2e8a:0003 device, try re-entering flash mode

   • Due to system version issues, it may display other names. If 2e8a:0003 is present, it means the flash mode has been entered

     
   Notes

   Proceed to the next step only when 2e8a:0003 is present

3. Pull the pre-compiled firmware

   • All are pre-compiled firmware here
   • Please note that the host computer needs to be online to install
   • The host computer needs to execute the following command to download the firmware package

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

   • It is recommended to update the firmware package if you have already downloaded it before proceeding with the remaining operations

   cd ~/FLY_Katapult && git pull

4. Flash firmware

tip

Only one of the firmware files needs to be flashed

• Below is the flashing command for the 500K CAN baud rate firmware

  sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY_Katapult/BL/SB2040/FLY_SB2040V3_CANBOOT_CAN_500K.uf2

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

  sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY_Katapult/BL/SB2040/FLY_SB2040V3_CANBOOT_CAN_1M.uf2

5. If you see the prompt below, the flashing was successful

   

tip

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

Confirming Firmware Startup

• If the firmware starts up normally, the LED will begin to blink