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tip
  • The SB2040 PRO comes with a pre-flashed Katapult firmware for CAN connection at a rate of 1M.
  • The Katapult firmware for SB2040 PRO CAN connection has rates of 500K and 1M, which can be flashed as needed.
  • Katapult Firmware Burning

Firmware Burning Instructions

  • The SB2040 PRO can use the CAN connection method to connect to the host machine.
  • CAN needs to be connected using XT30(2+2)-F.
  • Below is the appearance of the XT30(2+2)-F data cable.
Notice
  • Motherboard firmware burning needs to be done through Katapult to flash Klipper.
  • If you are sure that the motherboard already has Katapult flashed, there is no need to perform the final step of flashing the Katapult firmware, which is just a precaution in case the Katapult firmware on the motherboard was not flashed successfully.
  • You can quickly press the reset button twice to see if an LED on the motherboard is blinking; if it does, it indicates that the motherboard has entered the Katapult firmware.

How to Determine Which Firmware You Need​

  • The SB2040 PRO can use the following methods to connect to the host machine.
  • CAN Firmware
    • Advantage: If the Katapult firmware is flashed, the firmware can be updated without touching the motherboard, and it supports bus connections.
    • Disadvantage: May cause timeout errors or other issues when used with KlipperScreen.
    • Tip: If you need to use CAN, make sure the host machine supports CAN and needs to be paired with UTOC or a motherboard with bridging firmware flashed.

Katapult Firmware Instructions​

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

Katapult was originally named CanBoot and was later renamed.

  • Katapult firmware is a type of bootloader that can be used in conjunction with Klipper. After being flashed using methods like DFU, you can use commands to update the firmware in one click.
  • Advantages: Double resetting or quickly cutting power twice will enter the Katapult firmware, and the pre-configured LED will flash; if not configured, it won't flash.
  • The Katapult firmware can only be used for flashing firmware and cannot connect to Klipper!!!
  • There are three ways to connect the Katapult firmware to the host machine:
    • CAN connection
      • Advantages: After compiling the KLIPPER firmware, you can directly update the firmware using commands.
      • Disadvantages: You need to know the firmware compilation rate in advance.
    • RS232 connection
      • Advantages: After compiling the KLIPPER firmware, you can update the firmware using commands.
      • Disadvantages: You cannot update the firmware in one click using commands; you need to manually enter the Katapult firmware.
    • USB connection
      • Advantages: After compiling the KLIPPER firmware, you can directly update the firmware using commands.