def flash_progress_callback(action, progress_string, percentage):
    """Callback that can be used with ``JLink.flash()``.

    This callback generates a progress bar in the console to show the progress
    of each of the steps of the flash.

    Args:
      action (str): the current action being invoked
      progress_string (str): the current step in the progress
      percentage (int): the percent to which the current step has been done

    Returns:
      ``None``

    Note:
      This function ignores the compare action.
    """
    if action.lower() != 'compare':
        return progress_bar(min(100, percentage), 100, prefix=action)

    return None