BL Firmware

tip

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

Enter Flash Mode

tip

The BOOT button is on the right, and the RESET button is on the left

• There are two methods to enter flash mode
• First: With the tool board completely powered off, press and hold the BOOT button, then connect one end of a data-capable TYPE-C cable to the main board and the other end to your device
• Second: After connecting one end of a data-capable TYPE-C cable to the main board and the other end to your device, press and hold the BOOT button, then press the RST button, release the RST button first, and finally release the BOOT button
  

Flash Firmware

Windows Flash Tutorial

• Katapult Firmware for E3-PRO-Ultra
  • Click the download link below
  • Loading...

Notice

To ensure successful STM32 firmware flashing, please pay attention to the following:

• Some computers' USB ports may cause unstable flashing due to driver or signal compatibility issues. We recommend that you try connecting using a different USB port.
• If changing ports doesn't help, an effective solution is to connect via an external USB hub, which often improves compatibility.
• When the flashing software displays the error message below, try using a hub first. If the problem persists, please check or use the host computer to flash
  

1. Flashing tool Download link
2. Download SetupSTM32CubeProgrammer and STM32 DFU driver
3. Download the firmware to any directory on your computer
4. Connect the motherboard to the computer using a Type-C cable, ensuring it has entered dfu flashing mode
5. In STM32CubeProgrammer, select USB mode, then refresh and connect
   
6. If no error pop-up appears, the connection is successful.
   Warning

   If the following message appears, it indicates a computer or software issue. Please use the host computer to flash: Host Computer Flashing Guide

   
7. Click the download icon on the left and select the options below
   
8. Click Browse at the arrow's location, then select the firmware you need to flash
   
9. Select Start address and enter 0x08000000
   • Note: If the firmware is in HEX format, skip this step!!
   
10. Click Start automatic mode below to begin flashing the firmware
    
11. The appearance of the message below indicates that the firmware has been successfully flashed
    

tip

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