BL firmware

tip

• Please note that the bootloader has already been pre-flashed, no need to flash again

Enter programming mode

• There are two ways to enter programming mode
• First method: With the mainboard completely powered off, long press BOOT and connect one end of a data transfer cable to the mainboard and the other end to your device, suitable for WINDOWS
• Second method: After connecting one end of a data transfer cable to the mainboard and the other end to your device, long press BOOT and enter the command, suitable for the host computer
  

Programming the firmware

Windows programming tutorial

• C8 bootloader firmware

  • Click the download link below
  • Loading...

• Set the dip switches 3, 4 to the right, connect the lower machine and the host computer via the built-in USB

• Set the dip switches 1, 2 to the left, otherwise it will affect the connection between the lower machine and the host computer

  

Notes

• USB3.0 may fail to burn, please try to use the USB2.0 of the computer for burning
• If it still cannot be burned, please use the host software for burning
• If the error below appears, please use a USB extension dock
  

1. Burning tool Download address
2. Need to download SetupSTM32CubeProgrammer and STM32 DFU driver
3. Copy the compiled firmware klipper.bin, Katapult or Marlin to any directory on the computer
4. Use a Type-C data cable to connect the mainboard to the computer, and make sure it is in dfu burn mode
5. In STM32CubeProgrammer, select USB mode, refresh and connect
   
6. If no error pop-up appears, the connection is successful.
   Warning

   If the content shown in the figure appears, it is a computer or software issue. Please use the host software for burning:Host software burning tutorial

   
7. Click the left download icon and select the ones below
   
8. Click the Browse indicated by the arrow, and then select the firmware you need to burn
   
9. Select Start address and input 0x08000000
   • Please note that if the firmware is in HEX format, skip this step!
   
10. Click Start automatic mode at the bottom to start burning the firmware
    
11. If the prompt below appears, it means the firmware has been burned successfully
    

Host computer programming tutorial

• Set the dip switches 1, 2 to the right, connect the lower machine and the host computer via the built-in USB

• Set the dip switches 3, 4 to the left, otherwise it will affect the connection between the lower machine and the host computer

  

• After setting the dip switches as described above, the USB port below will be occupied by the lower machine, please do not connect other devices

  

• Please ensure the host computer can access the internet

  sudo wget https://cnb.cool/3dmellow/public/static-files/-/git/raw/main/firmware/HIDBL.bin -O ~/HIDBL.bin && sudo fly-flash -d c8 -u -f ~/HIDBL.bin

• When the following prompt appears, long press the BOOT key on the lower machine and then press Enter

  

• When the following image appears, it indicates that the programming is successful and you can release the BOOT key