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Tip
  • ERCF is pre-flashed with Katapult firmware for CAN connection at a rate of 1M from the factory.
  • The Katapult firmware for ERCF CAN connection supports rates of 500K and 1M, which can be flashed as needed.
  • Katapult Firmware Flashing

Firmware Flashing Instructions

  • ERCF can be connected to the host using a CAN connection method.
  • CAN requires the use of XT30(2+2)-F for connection.
  • Below is the style of the XT30(2+2)-F data cable.
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Note
  • Flashing firmware on the mainboard requires flashing Klipper via Katapult.
  • If you are sure the mainboard already has Katapult flashed, there is no need to perform the Katapult firmware flashing step at the end.

How to Determine Which Firmware You Need​

  • ERCF can be connected to the host using the following methods:
  • CAN Firmware Flashing
    • Advantages: If Katapult firmware is flashed, firmware updates can be performed without touching the mainboard, and bus connection is supported.
    • Disadvantages: When used together with KlipperScreen, it may cause errors such as homing timeouts.
    • Note: If using CAN, ensure the host supports CAN, and an UTOC or a mainboard with bridge firmware is required.
  • USB Firmware Flashing
    • Advantages: If Katapult firmware is flashed, firmware updates can be performed without touching the mainboard. If using a memory card or DFU for flashing, the original method of firmware updates is still required. Communication is reliable and stable.
    • Disadvantages: Multiple USB devices may affect data transmission.

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 flashing via DFU or similar methods, one-click firmware updates can be performed using commands.
  • Advantages: Quickly double-press the reset button or power cycle twice to enter Katapult firmware, during which the LED on the motherboard 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 machine, with each method’s firmware being independent of the others:
    • CAN connection
      • Advantages: After compiling the Klipper firmware, it can be updated directly using commands; strong anti-interference capability.
      • Disadvantages: The firmware compilation speed must be known in advance.
    • RS232 connection
      • Advantages: After compiling the Klipper firmware, it can be updated using commands; very strong anti-interference capability.
      • Disadvantages: One-click firmware updates via commands are not possible; manual entry into Katapult firmware is required.
    • USB connection
      • Advantages: After compiling the Klipper firmware, it can be updated directly using commands.
      • Disadvantages: Long data cables are prone to interference, potentially causing disconnection.
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