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tip
  • The SB2040 comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M
  • The SB2040 CAN connection Katapult firmware rates are 500K and 1M, you can flash it yourself if needed
  • Flash Katapult Firmware

Firmware Flashing Instructions

  • The SB2040 can connect to the host machine via CAN
  • CAN requires the use of XT30(2+2)-F for connection
  • Below is the style of the XT30(2+2)-F data cable
Notice
  • The motherboard firmware needs to be flashed with Klipper through Katapult
  • If you are sure that the motherboard has already been flashed with Katapult, there is no need to flash the Katapult firmware at the end, it's just a precaution in case the Katapult firmware on the motherboard wasn't successfully flashed
  • You can quickly press reset twice and check if an LED on the motherboard starts blinking, if it does, it means the motherboard has entered the Katapult firmware

How to Determine Which Firmware You Need​

  • The SB2040 can only connect to the host machine via CAN
  • Flash CAN Firmware
    • Benefits: If you've flashed the Katapult firmware, you can update the firmware without touching the motherboard, and it supports bus connection
    • Drawbacks: Might cause homing timeouts or other errors when used with KlipperScreen.
    • Note: If you need to use CAN, make sure your host machine supports CAN and you need to pair it with UTOC or a motherboard flashed with bridging firmware

Katapult Firmware Instructions​

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.