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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.

  • The Katapult firmware is a type of bootloader that can be used together with Klipper. After flashing via DFU or other methods, firmware can be updated with a single command.
  • Advantages: Quickly double-click the reset button or power cycle twice to enter the Katapult firmware, at which point 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 ways to connect to the host computer, and the firmware for each method is independent.
    • CAN connection
      • Advantages: After compiling the Klipper firmware, it can be updated directly using commands, with strong anti-interference capability.
      • Disadvantages: The firmware compilation speed needs to be known in advance.
    • RS232 connection
      • Advantages: After compiling the Klipper firmware, it can be updated using commands, with very strong anti-interference capability.
      • Disadvantages: Firmware cannot be updated with a single command; 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, which may cause disconnection.
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