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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 burning the firmware using methods like DFU, you can use commands to update the firmware with one click.
  • Advantage: Quickly double-clicking the reset button or quickly cutting power twice will enter the Katapult firmware, at which point there will be an LED flashing on the mainboard.
  • Katapult firmware can only be used to burn firmware and cannot connect to Klipper!!!
  • Katapult firmware supports three connection methods for connecting to the host computer, and the firmwares for these three methods are independent of each other.
    • CAN connection
      • Advantage: After compiling the KLIPPER firmware, you can directly update the firmware using a command, and it has strong interference resistance.
      • Disadvantage: You need to know the firmware compilation rate in advance.
    • RS232 connection
      • Advantage: After compiling the KLIPPER firmware, you can update the firmware using a command, and it has very strong interference resistance.
      • Disadvantage: You cannot use a command to update the firmware with one click; you need to manually enter the Katapult firmware.
    • USB connection
      • Advantage: After compiling the KLIPPER firmware, you can directly update the firmware using a command.
      • Disadvantage: A long data cable is prone to interference, which may lead to disconnection.
tip
  • SHT36 V2 can only be connected via CAN
  • CAN firmware is provided at both 500K and 1M rates
Note
  • APMF072 can only be flashed using a computer
  • STM32F103 can only be updated using a host computer

Entering Boot Mode

tip

The circled part is the BOOT switch

  • STM32F103 does not need to perform this step!!!!
  • With the motherboard completely powered off, press and hold the BOOT button while connecting a data cable with data transfer from one end of the motherboard to your device

Flashing Firmware

  • Katapult firmware for SHT36_V2 Click to download firmware automatically
Notice
  • System compatibility issues, please use the computer's USB2.0 for burning
  • If it still cannot be burned, please use the host machine for burning
  1. Burning tool Download link
  2. Need to download SetupSTM32CubeProgrammer and STM32 DFU driver
  3. Copy the firmware (klipper.bin) compiled in front or the precompiled Katapult firmware to any directory on the computer
  4. Use a Type-C data cable to connect the motherboard to the computer, make sure it is already:Enter DFU burning mode
  5. In STM32CubeProgrammer, select USB mode, refresh, and connect
  6. If no error pop-up appears, then the connection is successful.
    Warning

    If the content shown below appears, it indicates a problem with the computer or software, please use the host machine for burning:Host machine burning tutorial

  7. Click the download icon on the left and select several options below
  8. Click the Browse button indicated by the arrow, then select the firmware you need to burn
  9. Select Start address and enter 0x08000000
  10. Click Start automatic mode below to start burning the firmware
  11. The prompt below indicates that the firmware burning is complete

Confirming Firmware Startup

  • If the firmware starts normally, the LED will start flashing