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tip
  • SB2040 PRO comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M
  • SB2040 PRO CAN-connected Katapult firmware rates are available at 500K and 1M, which can be burned if needed
  • Katapult Firmware Burning

Firmware Burning Instructions

  • SB2040 PRO can be connected to the host computer via CAN connection
  • CAN needs to be connected using XT30(2+2)-F
  • Below is the style of XT30(2+2)-F data cable
Notice
  • Mainboard firmware burning needs to be done through Katapult burning Klipper
  • If it is confirmed that the mainboard has been burned with Katapult, there is no need to burn the last Katapult firmware, which is just a precaution in case the mainboard's Katapult firmware was not burned successfully
  • You can quickly press the reset button twice to see if there is an LED flashing on the mainboard, if so, it means the mainboard has entered Katapult firmware

How to Determine Which Firmware You Need​

  • SB2040 PRO can be connected to the host computer in the following ways
  • CAN Firmware
    • Advantage: If Katapult firmware is flashed, the firmware can be updated without touching the mainboard, and bus connection is supported
    • Disadvantage: Using KlipperScreen together may cause positioning timeout and other errors.
    • Tip: If CAN is needed, please make sure the host computer supports CAN, and it needs to be paired with UTOC or a mainboard with bridging firmware flashed

Katapult Firmware Description​

  • SB2040 PRO comes with Katapult firmware for CAN connection at a rate of 1M by default
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.