Katapult Firmware

Katapult Firmware Description

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Katapult was originally named CanBoot and was later renamed.

• Katapult firmware is a type of bootloader that can be used in conjunction with Klipper. After being flashed using methods like DFU, you can use commands to update the firmware in one click.
• Advantages: Double resetting or quickly cutting power twice will enter the Katapult firmware, and the pre-configured LED will flash; if not configured, it won't flash.
• The Katapult firmware can only be used for flashing firmware and cannot connect to Klipper!!!
• There are three ways to connect the Katapult firmware to the host machine:
  • CAN connection
    • Advantages: After compiling the KLIPPER firmware, you can directly update the firmware using commands.
    • Disadvantages: You need to know the firmware compilation rate in advance.
  • RS232 connection
    • Advantages: After compiling the KLIPPER firmware, you can update the firmware using commands.
    • Disadvantages: You cannot update the firmware in one click using commands; you need to manually enter the Katapult firmware.
  • USB connection
    • Advantages: After compiling the KLIPPER firmware, you can directly update the firmware using commands.

tip

• SHT36/42 supports CAN
• Only CAN firmware is provided here at speeds of 500K and 1M

Enter Programming Mode

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The circled part is the BOOT button

• With the motherboard completely powered off, short-circuit the BOOT button and then connect one end of the data transfer cable to the motherboard and the other end to your device.
  
  

Flash Firmware

STM32F072 Windows Flash Tutorial

• SHT36 Katapult firmware 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 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
    

STM32F072 Uploader Flash Tutorial

1. Install the programming tool

• No need to install the programming tool for the FLY upper computer.
• If you need to install it, please note: The upper computer needs to be connected to the internet to install successfully.
• If already installed, no need to install again.

sudo apt update
sudo apt install dfu-util -y

2. Execute the following command to check if the connection is successful.

lsusb

• If there is no DFU device, please try to re-enter programming mode.
• Due to system version issues, other names may be displayed. If 0483:df11 is shown, it indicates that the programming mode has been entered.

3. Pull the pre-compiled firmware

• These are all pre-compiled firmwares.
• Please note: The upper computer needs to be connected to the internet to install.
• The upper computer needs to execute the command below to download the firmware package.

cd && git clone https://github.com/FengHua741/FLY_Katapult.git

• If the firmware package has already been downloaded, it is recommended to update the firmware package before proceeding with the remaining steps.

cd ~/FLY_Katapult && git pull

4. Flash Firmware

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Only one firmware needs to be flashed.

• Below is the command to flash the 500K CAN speed firmware

  sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/developer/SHT36/FLY_SHT36_072_500K.BIN

• Below is the command to flash the 1M CAN speed firmware

  sudo dfu-util -a 0 -d 0483:df11 --dfuse-address 0x08000000 -D ~/FLY_Katapult/developer/SHT36/FLY_SHT36_072_1M.BIN

5. When you see the content as shown in the arrow below File downloaded successfully, the flashing is successful.

   

tip

After flashing, the motherboard needs to be powered off completely.