Katapult Firmware

Notes

• Katapult is the BL firmware
• SHT36_V3 supports CAN and RS232
• Only CAN firmware at 500K and 1M rates are provided here

Entering Flash Mode

Tip

The arrow points to the BOOT button

• Entering flash mode:
  • Completely power off the tool board.
  • Press and hold the BOOT button (as shown in the figure below). At the same time, connect it to the computer via a Type-C cable.
  Loading...

Flashing Firmware

• Windows Flashing Tutorial
• Host Flashing Tutorial

• SHT36 V3 firmware download address
• You can obtain the firmware via the following link:

• Download Firmware Package – Direct download of the latest firmware zip archive

Please note

The zip archive must be extracted before use.

• Repository Address – Access the firmware repository

• Alternatively, download the complete repository via git (ensure the host machine has internet access):

• For general systems

  cd && git clone https://cnb.cool/3dmellow/FLY-Firmware.git

• For FLY host machine

  git clone https://cnb.cool/3dmellow/FLY-Firmware.git /data/FLY-Firmware
  ln -s /data/FLY-Firmware /root/FLY-Firmware

• If the firmware package has already been downloaded, it is recommended to update to the latest version before proceeding:

  cd ~/FLY-Firmware && git pull

---

• The previous repository is no longer maintained. To delete it, execute:

  rm -rf ~/FLY_Katapult /root/FLY_Katapult

• The firmware is located at

FLY-Firmware/ToolBoard/SHT36

• Prepare a data cable with data transmission functionality
• Download the firmware to the computer
• Connect the BOOT jumper, or press and hold the BOOT button while connecting to the computer, then the RPI-RP2 disk will appear
  Loading...
• Remove the BOOT jumper or release the button!!!
• Copy the firmware to be flashed into it. Please note that only firmware with the UF2 file extension can be used!!! (Do not modify the file extension; it is ineffective)
• Reference
  Loading...
• After copying the firmware, the RPI-RP2 disk will disappear automatically, indicating that the firmware flashing is complete!

1. Install the flashing tool

   • Enter the following command in SSH
   • This only needs to be executed for the first flashing; no need to run it again afterwards

   cd ~/klipper/lib/rp2040_flash/ && make

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

   • Enter lsusb

   • If there is no 2e8a:0003 device, try re-entering flashing mode

   • Due to system version issues, it may display a different name. If 2e8a:0003 appears, it means flashing mode has been entered

     Loading...
   Notes

   Proceed to the next step only when 2e8a:0003 is present

3. Pull the precompiled firmware

   • These are all precompiled firmware files
   • Please note that the host machine needs internet access to install
   • The host machine needs to execute the following command to download the firmware package

   cd && git clone https://cnb.cool/3dmellow/FLY-Firmware.git

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

   cd ~/FLY-Firmware && git pull

4. Flashing the firmware

Tip

Only one firmware needs to be flashed

• Below is the flash command for 500K CAN rate firmware

sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/SHT36/FLY_SHT36V3_katapult_CAN_500K.uf2

• Below is the flash command for 1M CAN rate firmware

sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/SHT36/FLY_SHT36V3_katapult_CAN_1M.uf2

5. Flashing is successful if the following prompt appears

Loading...

Tip

After flashing, completely power off the motherboard once.

Verifying Firmware Startup

• If the firmware starts normally, the LED will blink

Loading...