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BL Firmware

tip
  • Please note that the bootloader has already been pre-flashed at the factory and does not need to be re-flashed.

Entering Programming Mode​

tip

The button on the right is the BOOT button, and the button on the left is the RESET button.

  • There are two ways to enter programming mode.
  • The first method: With the main board completely powered off, press and hold the BOOT button, then connect one end of the data transfer cable to the main board and the other end to your device.
  • The second method: After connecting one end of the data transfer cable to the main board and the other end to your device, press and hold the BOOT button, then press the RST button, release the RST button first, and finally release the BOOT button.

Flashing Firmware​

  • Katapult firmware for E3-PRO-Ultra Click to automatically download firmware
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
tip

After flashing is complete, the main board needs to be completely powered off once.