Skip to main content

Katapult Firmware

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.
Tip
  • SHT36 V2 can only use CAN connection
  • CAN firmware is available in 500K and 1M baud rates
Notes
  • APMF072 can only be flashed using a computer
  • STM32F103 can only be updated using the host machine

Entering Flash Mode​

Tip

The circled item is BOOT

  • STM32F103 does not require this step!!!!
  • With the motherboard completely powered off, short the BOOT pins, then connect one end of a TYPE-C cable with data transfer capability to the motherboard and the other end to your device
    Loading...

Flashing Firmware​

  • SHT36_V2 Katapult firmware
  • You can download the firmware from the following link:
  • 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...

Verify Firmware Startup​

  • If the firmware has started successfully, the LED will begin to blink
    Loading...
Loading...