Skip to main content

Katapult Firmware

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.
Tip
  • SHT36/42 supports CAN
  • Only CAN firmware is provided here, with rates of 500K and 1M

Entering Flash Mode​

Tip

The circled item is BOOT

  • With the motherboard completely powered off, short-circuit the BOOT button, then connect one end of a TYPE-C cable (with data transfer capability) to the motherboard and the other end to your device.
    Loading...
    Loading...

Flashing Firmware​

  • SHT36 Katapult Firmware
  • You can obtain the firmware via the following links:
  • The firmware is located at
FLY-Firmware/ToolBoard/SHT36
Notice

To ensure successful STM32 flashing, please note the following:

  • The USB port on some computers may cause unstable flashing due to driver or signal compatibility issues. It is recommended to try a different USB port for connection.
  • If changing ports does not work, an effective solution is to connect via an external USB hub, which often improves compatibility.
  • When the flashing software reports the error shown below, please also prioritize trying a USB hub. If the issue persists, check or use the host computer for flashing.
    Loading...
  1. Flashing tool Download Link
  2. You need to download SetupSTM32CubeProgrammer and STM32 DFU Driver
  3. Download the firmware to any directory on your computer
  4. Connect the motherboard to the computer using a Type-C cable, ensuring it has entered dfu flashing mode
  5. In STM32CubeProgrammer, select USB mode, refresh, and connect
    Loading...
  6. If no error popup appears, the connection is successful.
    Loading...
  7. Click the download icon on the left and check the following options
    Loading...
  8. Click Browse as indicated by the arrow, then select the firmware you need to flash
    Loading...
  9. Set Start address to 0x08000000
    • Note: If the firmware is in HEX format, please skip this step!!
    Loading...
  10. Click Start automatic mode below to begin flashing the firmware
    Loading...
  11. The following prompt indicates that the firmware flashing is complete
    Loading...
Loading...