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Tip
  • The ERCF comes pre-flashed with Katapult firmware for CAN connection, with a rate of 1M.
  • The ERCF Katapult firmware for CAN connection is available in two rates: 500K and 1M. You can flash it yourself if needed.
  • Katapult Firmware Flashing

Firmware Flashing Instructions

  • The ERCF can connect to the host computer using a CAN connection.
  • The CAN connection requires an XT30(2+2)-F cable.
  • Below is the style of the XT30(2+2)-F data cable:
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Important Notes
  • Flashing the mainboard firmware requires using Katapult to flash Klipper.
  • If you are certain that the mainboard already has Katapult flashed, you do not need to perform the final step of flashing the Katapult firmware.

How to Determine Which Firmware You Need​

  • The ERCF can connect to the host computer using the following methods:
  • CAN Firmware Flashing
    • Advantages: If Katapult firmware is flashed, you can update the firmware without touching the mainboard, and it supports bus connections.
    • Disadvantages: Using it with KlipperScreen may cause errors such as homing timeouts.
    • Note: If you plan to use CAN, ensure the host computer supports CAN and that you have a UTOC or a mainboard flashed with bridge firmware.
  • USB Firmware Flashing
    • Advantages: If Katapult firmware is flashed, you can update the firmware without touching the mainboard. If using an SD card or DFU flashing, you will need to update the firmware in the original way. Communication is reliable and stable.
    • Disadvantages: Multiple USB devices may affect data transmission.

Katapult Firmware Explanation​

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 flashing via methods like DFU, the firmware can be updated with a single command.
  • Advantages: Quickly double-click the reset button or power off twice rapidly to enter Katapult firmware, at which point the motherboard's LED will blink.
  • Katapult firmware can only be used to flash firmware and cannot connect to Klipper!!!
  • Katapult firmware supports three methods for connecting to the host computer, with each method's firmware being independent of the others:
    • CAN connection
      • Advantages: After compiling the Klipper firmware, the firmware can be updated directly using commands, with strong anti-interference capabilities.
      • Disadvantages: The firmware compilation rate must be known in advance.
    • RS232 connection
      • Advantages: After compiling the Klipper firmware, the firmware can be updated using commands, with very strong anti-interference capabilities.
      • Disadvantages: Firmware cannot be updated with a single command; manual entry into Katapult firmware is required.
    • USB connection
      • Advantages: After compiling the Klipper firmware, the firmware can be updated directly using commands.
      • Disadvantages: Long data cables are prone to interference, which may cause disconnections.
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