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BL Firmware

tip
  • Please note that the bootloader is pre-flashed at the factory and does not need to be re-flashed.

Entering Flash Mode​

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

  • There are two methods to enter flash mode.
  • First method: With the tool board completely powered off, press and hold the BOOT button, then connect a data-capable TYPE-C cable from the mainboard to your device.
  • Second method: After connecting a data-capable TYPE-C cable from the mainboard to your device, press and hold the BOOT button, then press the RST button, release the RST button, and finally release the BOOT button.
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Flashing Firmware​

  • Katapult firmware for E3-PRO-Ultra
    • Click the download link below.
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Important Notice

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

  • Some computer USB ports may experience unstable programming due to driver or signal compatibility issues. It is recommended to try connecting to a different USB port.
  • If changing ports does not help, an effective solution is to connect via an external USB hub, which often improves compatibility.
  • When the programming software reports the error message shown below, also try using a hub first. If the issue persists, please check or use the host computer for programming.
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  1. Programming Tool Download Link
  2. Download SetupSTM32CubeProgrammer and the STM32 DFU Driver.
  3. Download the firmware to any directory on your computer.
  4. Connect the mainboard to the computer using a Type-C cable. Ensure it has entered DFU programming mode.
  5. In STM32CubeProgrammer, select USB mode, refresh, and connect.
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  6. If no error pop-up appears, the connection is successful.
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  7. Click the download icon on the left and select the options shown below.
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  8. Click Browse as indicated by the arrow, then select the firmware you need to program.
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  9. For Start address, enter 0x08000000.
    • Note: If the firmware is in HEX format, please skip this step!!
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  10. Click Start automatic mode below to begin programming the firmware.
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  11. The prompt below indicates that the firmware programming is complete.
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tip

After flashing is complete, the mainboard needs to be completely powered off once.

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