BL firmware

tip

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

Enter programming mode

• There are two methods to enter programming mode.
• First method: With the motherboard completely powered off, hold the BOOT button and connect the data transmission cable to the motherboard and your device, suitable for WINDOWS.
• Second method: After connecting the data transmission cable to the motherboard and your device, hold the BOOT button and input the command, suitable for the host machine.
  

Flash firmware

Windows flashing tutorial

• The bootloader firmware for C8:

  Click to automatically download the firmware

• Set DIP switches 3, 4 to the right to connect the lower-level machine to the upper-level machine via the built-in USB.

• Set DIP switches 1, 2 to the left, otherwise it will affect the connection between the lower-level machine and the upper-level machine.

  

Notice

• System compatibility issues, please use the computer's USB2.0 for burning
• If it still cannot be burned, please use an upper machine for burning

1. Burning tool Download link
2. Download SetupSTM32CubeProgrammer and STM32 DFU driver
3. Copy the compiled firmware (klipper.bin) or precompiled Katapult firmware to any directory on your computer
4. Connect the motherboard to the computer using a Type-C data cable, ensuring that it has already entered DFU burning mode
5. In STM32CubeProgrammer, select USB mode and refresh to connect
   
6. If no error pop-up appears, the connection is successful
7. Click the download icon on the left and select several options below
   
8. Click the arrow point to Browse, then choose 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 following prompt indicates that the firmware burning is complete
    

Host machine flashing tutorial

• Set DIP switches 1, 2 to the right to connect the lower-level machine to the upper-level machine via the built-in USB.

• Set DIP switches 3, 4 to the left, otherwise it will affect the connection between the lower-level machine and the upper-level machine.

  

• After setting the DIP switches as described above, the USB port below will be occupied by the lower-level machine, so do not connect any other devices.

  

• Ensure that the host machine can access the internet normally.

  sudo wget https://cdn.mellow.klipper.cn/BL/HIDBL.bin -O ~/HIDBL.bin && sudo fly-flash -d c8 -u -f ~/HIDBL.bin

• When the prompt below appears, hold down the lower-level machine's BOOT button and press enter.

  

• When the image below appears, it indicates that the flashing is successful and you can release the BOOT button.