Katapult Firmware

Katapult Firmware Description

Tip

Katapult was originally named CanBoot and later renamed to katapult.

• The Katapult firmware is a type of bootloader that can be used together with Klipper. After flashing via DFU or other methods, firmware can be updated with a single command.
• Advantages: Quickly double-click the reset button or power cycle twice to enter the Katapult firmware, at which point the LED on the motherboard will blink.
• Katapult firmware can only be used to flash firmware and cannot connect to Klipper!!!
• Katapult firmware supports three ways to connect to the host computer, and the firmware for each method is independent.
  • CAN connection
    • Advantages: After compiling the Klipper firmware, it can be updated directly using commands, with strong anti-interference capability.
    • Disadvantages: The firmware compilation speed needs to be known in advance.
  • RS232 connection
    • Advantages: After compiling the Klipper firmware, it can be updated using commands, with very strong anti-interference capability.
    • Disadvantages: Firmware cannot be updated with a single command; manual entry into Katapult firmware is required.
  • USB connection
    • Advantages: After compiling the Klipper firmware, it can be updated directly using commands.
    • Disadvantages: Long data cables are prone to interference, which may cause disconnection.

Tip

• SHT36 PRO supports CAN
• Only CAN firmware is provided here, available in 500K and 1M rates

Entering Flash Mode

Tip

The circled item is BOOT

• With the mainboard completely powered off, short-circuit BOOT, then connect one end of a TYPE-C cable with data transfer capability to the mainboard and the other end to your device
• Then remove the short-circuit on BOOT
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Flashing Firmware

• Windows Flashing Tutorial
• Host Machine Flashing Tutorial

• SHT36_PRO Katapult firmware
• You can obtain the firmware via the following link:

• FLY_SHT36PRO_CANBOOT_500K.uf2
• FLY_SHT36PRO_CANBOOT_1M.uf2

Windows 默认可能隐藏文件扩展名。下载后请确认文件扩展名未被修改，不要保存成 .txt 或其他扩展名。

• 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
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• 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
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• 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 once for the first flash, no need to execute it again later

   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, please try to re-enter flashing mode

   • Due to system version differences, other names may be displayed; if 2e8a:0003 appears, it means you have entered flashing mode

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   Notes

   Only proceed to the next step when 2e8a:0003 is present

3. Pull the pre-compiled firmware

   • The firmware packages here are all pre-compiled
   • Please note that the host machine needs internet access to install
   • Please choose the corresponding download method based on your system
   • Linux System
   • FLYOS System

   • 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 you have already downloaded the firmware package, it is recommended to update it before proceeding with the remaining operations

   cd ~/FLY-Firmware && git pull

   • On FLYOS, the firmware package is downloaded by default to /data/FLY-Firmware, and a symbolic link /root/FLY-Firmware is created. Subsequent flashing commands use the same paths as on Linux

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

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

   cd /data/FLY-Firmware && git pull

4. Flash the firmware

Tip

Only one of the firmware files needs to be flashed

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

sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/SHT36/FLY_SHT36PRO_CANBOOT_500K.uf2

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

sudo ~/klipper/lib/rp2040_flash/rp2040_flash ~/FLY-Firmware/ToolBoard/SHT36/FLY_SHT36PRO_CANBOOT_1M.uf2

5. If the following prompt appears, the flashing was successful

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Tip

After flashing is complete, you need to completely power off the mainboard once.

Confirming Whether the Firmware Has Started

• If the firmware starts normally, the LED will begin to blink
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