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Tip
  • ERCF V2 comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M
  • The Katapult firmware rate for ERCF V2 CAN connection supports 500K and 1M, and can be flashed as needed
  • Flash Katapult Firmware

Firmware Flashing Instructions

  • ERCF V2 can connect to the host computer using two methods: RS232 and CAN
  • RS232 and CAN require 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
  • The mainboard firmware must be flashed with Klipper via Katapult
  • If you have confirmed that the mainboard has already been flashed with Katapult, there is no need to perform the last step of flashing the Katapult firmware

How to Determine Which Firmware You Need​

  • ERCF V2 can connect to the host computer using the following methods
  • CAN Firmware Flashing
    • Advantage: If the Katapult firmware is flashed, firmware updates can be performed without touching the mainboard, and bus connection is supported
    • Disadvantage: Using it with KlipperScreen may cause errors such as homing timeout.
    • Note: If CAN is needed, ensure that the host computer supports CAN and that a UTOC or a mainboard with bridge firmware is used
  • RS232 Firmware Flashing
    • Advantage: No special software is required to use; communication is reliable and stable
    • Disadvantage: Re-flashing firmware requires entering manual DFU mode or double-clicking RST to enter Katapult for firmware updates
    • Note: Requires a G2T or UTOR to use
  • USB Firmware Flashing
    • Advantage: If the Katapult firmware is flashed, firmware updates can be performed without touching the mainboard. If using an SD card or DFU flashing, the original method must still be used; communication is reliable and stable
    • Disadvantage: 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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