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tip
  • The ERCF V2 comes pre-flashed with Katapult firmware for CAN connection at a rate of 1M.
  • The ERCF V2 Katapult firmware for CAN connection is available in 500K and 1M rates; you can flash it yourself if needed.
  • Katapult Firmware Flashing

Firmware Flashing Instructions

  • The ERCF V2 can connect to the host computer using RS232 or CAN.
  • Both RS232 and CAN connections require the use of 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 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 V2 can connect to the host computer using the following methods:
  • CAN Firmware Flashing
    • Advantages: If Katapult firmware is flashed, firmware can be updated without physically touching the mainboard, and it supports bus connections.
    • Disadvantages: May cause errors like homing timeouts when used with KlipperScreen.
    • Note: To use CAN, ensure the host computer supports CAN, and you need to use it with a UTOC or a mainboard flashed with bridge firmware.
  • RS232 Firmware Flashing
    • Advantages: No special software required for use; communication is reliable and stable.
    • Disadvantages: Re-flashing firmware requires entering manual DFU mode to update, or double-clicking RST to enter Katapult for updates.
    • Note: Requires a G2T or UTOR to use.
  • USB Firmware Flashing
    • Advantages: If Katapult firmware is flashed, firmware can be updated without physically touching the mainboard. If using an SD card or DFU flashing, updates still require the original method. 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 in quick succession to enter Katapult firmware, at which point an 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 computer, 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, with strong anti-interference capability.
      • Disadvantages: Requires prior knowledge of the firmware's compiled baud rate.
    • RS232 connection
      • Advantages: After compiling the Klipper firmware, it can be updated using commands, with very strong anti-interference capability.
      • Disadvantages: Cannot update the firmware with a single command; requires manually entering Katapult firmware.
    • 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 disconnections.
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