Flash the Image

This section details the steps for flashing your device. Ensure you’ve completed the prerequisites and set up the usb-tool as described in the previous section.

Note

To obtain the latest firmware image, either build it from source or download it from the official repository.

See previous sections for details on building or downloading the image.

Connect the board

Flashing Grinn AstraEVB-1680 requires:

  • external PoE (recommended) or 12V power source,

  • Debug USB port connected to the host PC.

|BOARD_NAME| board connections

Manually enabling download mode

To flash the Grinn AstraEVB-1680, it must first be in download mode. Follow these steps carefully:

  • Locate the buttons: Find the RESET and USB_BOOT buttons on your device. Refer to picture below for details.

  • Enter bootloader sequence:

    • Press and hold both the RESET and USB_BOOT buttons simultaneously.

    • While still holding USB_BOOT, release RESET.

    • Wait a moment, then release USB_BOOT.

Grinn AstraEVB-1680 should now be in download mode.

|BOARD_NAME| board buttons

Flashing

Once the usb-tool is ready and your device is in download mode, you can proceed with flashing the firmware.

  • Navigate to the root directory of your Yocto build

    Open new terminal (do not use Grinn Yocto Docker container) and navigate to the root directory of your Grinn AstraEVB-1680 Yocto build.

    cd /path/to/your/yocto/main/directory
  • Execute the flashing process:

    Use the flash-grinn-astra.sh helper script to flash your device, specifying the path to usb-tool and selecting Grinn AstraEVB-1680 platform (evb). Proper image will be selected from Yocto build tree automatically:

    ./src/meta-grinn-astra/scripts/flash-grinn-astra </path/to/your/usb-tool> <platform_selector>

    If you have a pre-built image to be flashed you can specify path to the image manually:

    ./src/meta-grinn-astra/scripts/flash-grinn-astra </path/to/your/usb-tool> <platform_selector> [/path/to/pre/built/image]

Note

  • Monitor the flashing process: The script will display progress updates in your terminal. Do not disconnect your device or interrupt the process until it completes successfully.

  • Verify the flashing (optional but recommended): After the flashing is complete, an appropriate success message will appear in the script’s output.

Troubleshooting

  • Failed to boot device / Device not detected:
    • Common Messages:

      • “Boot Failed: Timeout during boot, press RESET while holding USB_BOOT to try again”

      • “Failed to Boot Device”

    • Solution:

      • Confirm your device is correctly in download mode by repeating the steps in the Manually enabling download mode section.

      • Check your USB cable and connection.

  • Flashing tool errors:

    • Ensure you are running the command with sudo.

    • Double-check the command syntax and the path to your firmware image.

    • Refer to the usb-tool’s documentation or its GitHub repository for specific error messages.

  • Flashing fails mid-process:

    • Do not disconnect the device.

    • Put the device back into bootloader mode by repeating the steps in the Manually enabling download mode section and attempt to re-flash.

    • If the issue persists, your firmware image might be corrupted, or there could be a hardware issue with your device.