Draft of new semantics

This commit is contained in:
Joel Collins 2020-01-29 11:55:39 +00:00
parent b39a0653f2
commit 19af98736d
13 changed files with 252 additions and 187 deletions

View file

@ -3,38 +3,9 @@ from openflexure_microscope.camera.capture import build_captures_from_exif
import logging
# Import device modules
# NB this will eventually be handled by the RC file, so you can choose what device
# class should be attached.
try:
from openflexure_microscope.camera.pi import PiCameraStreamer
except ImportError:
logging.warning("Unable to import PiCameraStreamer")
from openflexure_microscope.camera.mock import MockStreamer
from openflexure_microscope.stage.sanga import SangaStage
from openflexure_microscope.stage.mock import MockStage
default_microscope = Microscope()
# Initialise camera
logging.debug("Creating camera object...")
try:
api_camera = PiCameraStreamer()
except Exception as e:
logging.error(e)
logging.warning("No valid camera hardware found. Falling back to mock camera!")
api_camera = MockStreamer()
# Initialise stage
logging.debug("Creating stage object...")
api_stage = MockStage()
# Attach devices to microscope
logging.debug("Attaching devices to microscope...")
default_microscope.attach(api_camera, api_stage)
# Restore loaded capture array to camera object
logging.debug("Restoring captures...")
default_microscope.camera.images = build_captures_from_exif(

View file

@ -30,7 +30,7 @@ class SettingsProperty(View):
logging.debug("Updating settings from PUT request:")
logging.debug(payload.json)
microscope.apply_settings(payload.json)
microscope.update_settings(payload.json)
microscope.save_settings()
return self.get()
@ -65,7 +65,7 @@ class NestedSettingsProperty(View):
dictionary = create_from_path(keys)
set_by_path(dictionary, keys, payload.json)
microscope.apply_settings(dictionary)
microscope.update_settings(dictionary)
microscope.save_settings()
return self.get(route)

View file

@ -121,7 +121,8 @@ class BaseCamera(metaclass=ABCMeta):
self.stream_timeout = 20
self.stream_timeout_enabled = False
self.status = {"board": None}
self.stream_active = False
self.record_active = False
self.paths = {"default": BASE_CAPTURE_PATH, "temp": TEMP_CAPTURE_PATH}
@ -129,8 +130,24 @@ class BaseCamera(metaclass=ABCMeta):
self.images = []
self.videos = []
@property
@abstractmethod
def apply_settings(self, config: dict):
def configuration(self):
"""The current camera configuration."""
pass
@property
@abstractmethod
def state(self):
"""The current read-only camera state."""
pass
@property
def settings(self):
return self.read_settings()
@abstractmethod
def update_settings(self, config: dict):
"""Update settings from a config dictionary"""
with self.lock:
# Apply valid config params to camera object
@ -187,7 +204,7 @@ class BaseCamera(metaclass=ABCMeta):
self.last_access = time.time()
self.stop = False
if not self.status["stream_active"]:
if not self.stream_active:
# start background frame thread
self.thread = threading.Thread(target=self._thread)
self.thread.daemon = True
@ -207,12 +224,12 @@ class BaseCamera(metaclass=ABCMeta):
logging.debug("Stopping worker thread")
timeout_time = time.time() + timeout
if self.status["stream_active"]:
if self.stream_active:
self.stop = True
self.thread.join() # Wait for stream thread to exit
logging.debug("Waiting for stream thread to exit.")
while self.status["stream_active"]:
while self.stream_active:
if time.time() > timeout_time:
logging.debug("Timeout waiting for worker thread close.")
raise TimeoutError("Timeout waiting for worker thread close.")
@ -352,7 +369,7 @@ class BaseCamera(metaclass=ABCMeta):
self.frames_iterator = self.frames()
logging.debug("Entering worker thread.")
self.status["stream_active"] = True
self.stream_active = True
for frame in self.frames_iterator:
self.frame = frame
@ -365,9 +382,7 @@ class BaseCamera(metaclass=ABCMeta):
and ( # If using timeout
time.time() - self.last_access > self.stream_timeout
)
and not self.status[ # And timeout time
"preview_active"
] # And GPU preview is not active
and not self.preview_active # And GPU preview is not active
):
self.frames_iterator.close()
break
@ -383,4 +398,4 @@ class BaseCamera(metaclass=ABCMeta):
logging.debug("BaseCamera worker thread exiting...")
# Set stream_activate state
self.status["stream_active"] = False
self.stream_active = False

View file

@ -26,17 +26,13 @@ We override the logging settings in api.app by setting a level for PIL here.
pil_logger = logging.getLogger("PIL")
pil_logger.setLevel(logging.INFO)
# MAIN CLASS
class MockStreamer(BaseCamera):
class MissingCamera(BaseCamera):
def __init__(self):
# Run BaseCamera init
BaseCamera.__init__(self)
# Store state of PiCameraStreamer
self.status.update(
{"stream_active": False, "record_active": False, "board": None}
)
# Update config properties
self.image_resolution = (1312, 976)
self.stream_resolution = (640, 480)
@ -71,6 +67,16 @@ class MockStreamer(BaseCamera):
image.save(self.stream, format="JPEG")
@property
def configuration(self):
"""The current camera configuration."""
return {}
@property
def state(self):
"""The current read-only camera state."""
return {}
def initialisation(self):
"""Run any initialisation code when the frame iterator starts."""
pass
@ -101,7 +107,7 @@ class MockStreamer(BaseCamera):
return conf_dict
def apply_settings(self, config: dict):
def update_settings(self, config: dict):
"""
Write a config dictionary to the PiCameraStreamer config.
@ -117,7 +123,7 @@ class MockStreamer(BaseCamera):
with self.lock:
# Apply valid config params to camera object
if not self.status["record_active"]: # If not recording a video
if not self.record_active: # If not recording a video
for key, value in config.items(): # For each provided setting
if hasattr(self, key):

View file

@ -47,6 +47,7 @@ from .base import BaseCamera, CaptureObject
from .set_picamera_gain import set_analog_gain, set_digital_gain
from openflexure_microscope.paths import settings_file_path
from openflexure_microscope.utilities import serialise_array_b64
# MAIN CLASS
@ -85,14 +86,7 @@ class PiCameraStreamer(BaseCamera):
) #: :py:class:`picamera.PiCamera`: Picamera object
# Store status of PiCameraStreamer
self.status.update(
{
"stream_active": False,
"record_active": False,
"preview_active": False,
"board": f"picamera_{self.camera.revision}",
}
)
self.preview_active = False
# Reset variable states
self.set_zoom(1.0)
@ -116,15 +110,37 @@ class PiCameraStreamer(BaseCamera):
"picamera_lst.npy"
) #: str: Path of .npy lens shading table file
# Update board identifier
self.status.update({})
# Create an empty stream
self.stream = io.BytesIO()
# Start streaming
self.start_worker()
@property
def configuration(self):
"""The current camera configuration."""
config = {
"board": self.camera.revision,
}
if self.read_lens_shading_table():
b64_string, dtype, shape = serialise_array_b64(self.read_lens_shading_table())
config.update({
"lens_shading_table": {
"b64_string": b64_string,
"dtype": dtype,
"shape": shape,
}
})
return config
@property
def state(self):
"""The current read-only camera state."""
return {}
def initialisation(self):
"""Run any initialisation code when the frame iterator starts."""
pass
@ -176,7 +192,7 @@ class PiCameraStreamer(BaseCamera):
logging.info("Saving picamera_lst to {}".format(self.picamera_lst_path))
self.save_lens_shading_table()
def apply_settings(self, config: dict):
def update_settings(self, config: dict):
"""
Write a config dictionary to the PiCameraStreamer config.
@ -194,10 +210,10 @@ class PiCameraStreamer(BaseCamera):
with self.lock:
# Apply valid config params to Picamera object
if not self.status["record_active"]: # If not recording a video
if not self.record_active: # If not recording a video
# Pause stream while changing settings
if self.status["stream_active"]: # If stream is active
if self.stream_active: # If stream is active
logging.info("Pausing stream to update config.")
self.stop_stream_recording() # Pause stream
paused_stream = True # Remember to unpause stream when done
@ -365,7 +381,7 @@ class PiCameraStreamer(BaseCamera):
self.camera.preview.window = window
if fullscreen:
self.camera.preview.fullscreen = fullscreen
self.status["preview_active"] = True
self.preview_active = True
except picamera.exc.PiCameraMMALError as e:
logging.error(
"Suppressed a MMALError in start_preview. Exception: {}".format(e)
@ -380,7 +396,7 @@ class PiCameraStreamer(BaseCamera):
def stop_preview(self):
"""Stop the on board GPU camera preview."""
self.camera.stop_preview()
self.status["preview_active"] = False
self.preview_active = False
def start_recording(self, output, fmt: str = "h264", quality: int = 15):
"""Start recording.
@ -398,7 +414,7 @@ class PiCameraStreamer(BaseCamera):
"""
with self.lock:
# Start recording method only if a current recording is not running
if not self.status["record_active"]:
if not self.record_active:
# Start the camera video recording on port 2
logging.info("Recording to {}".format(output))
@ -412,7 +428,7 @@ class PiCameraStreamer(BaseCamera):
)
# Update status dictionary
self.status["record_active"] = True
self.record_active = True
return output
@ -432,7 +448,7 @@ class PiCameraStreamer(BaseCamera):
logging.info("Recording stopped")
# Update status dictionary
self.status["record_active"] = False
self.record_active = False
def stop_stream_recording(
self, splitter_port: int = 1, resolution: Tuple[int, int] = None
@ -500,7 +516,7 @@ class PiCameraStreamer(BaseCamera):
self.camera.resolution = resolution
# If the stream should be active
if self.status["stream_active"]:
if self.stream_active:
try:
# Start recording on stream port
self.camera.start_recording(

View file

@ -7,7 +7,7 @@ from uuid import UUID
import numpy as np
from fractions import Fraction
from .paths import CONFIG_FILE_PATH, DEFAULT_CONFIG_FILE_PATH
from .paths import SETTINGS_FILE_PATH, DEFAULT_SETTINGS_FILE_PATH, CONFIGURATION_FILE_PATH, DEFAULT_CONFIGURATION_FILE_PATH
class OpenflexureSettingsFile:
@ -19,21 +19,21 @@ class OpenflexureSettingsFile:
expand (bool): Expand paths to valid auxillary config files.
"""
def __init__(self, config_path: str = None):
global DEFAULT_CONFIG, CONFIG_FILE_PATH
def __init__(self, path: str, defaults: dict = {}):
global DEFAULT_SETTINGS
# Set arguments
self.config_path = config_path or CONFIG_FILE_PATH
self.path = path
# Initialise basic config file with defaults if it doesn't exist
initialise_file(self.config_path, populate=DEFAULT_CONFIG)
initialise_file(self.path, populate=defaults)
def load(self) -> dict:
"""
Loads settings from a file on-disk.
"""
# Unexpanded config dictionary (used at load/save time)
loaded_config = load_json_file(self.config_path)
loaded_config = load_json_file(self.path)
logging.debug("Reading settings from disk")
return loaded_config
@ -50,11 +50,11 @@ class OpenflexureSettingsFile:
save_settings = config
if backup:
if os.path.isfile(self.config_path):
shutil.copyfile(self.config_path, self.config_path + ".bk")
if os.path.isfile(self.path):
shutil.copyfile(self.path, self.path + ".bk")
logging.debug("Saving settings dictionary to disk")
save_json_file(self.config_path, save_settings)
save_json_file(self.path, save_settings)
def merge(self, config: dict) -> dict:
"""
@ -178,10 +178,17 @@ def initialise_file(config_path, populate: str = "{}\n"):
outfile.write(populate)
# Load the default config
with open(DEFAULT_CONFIG_FILE_PATH, "r") as default_rc:
DEFAULT_CONFIG = default_rc.read()
# Load the default settings
with open(DEFAULT_SETTINGS_FILE_PATH, "r") as default_settings:
DEFAULT_SETTINGS = default_settings.read()
#: Default user settings object
user_settings = OpenflexureSettingsFile(config_path=CONFIG_FILE_PATH)
user_settings = OpenflexureSettingsFile(path=SETTINGS_FILE_PATH, defaults=DEFAULT_SETTINGS)
# Load the default configuration
with open(DEFAULT_CONFIGURATION_FILE_PATH, "r") as default_configuration:
DEFAULT_CONFIGURATION = default_configuration.read()
#: Default user settings object
user_configuration = OpenflexureSettingsFile(path=CONFIGURATION_FILE_PATH, defaults=DEFAULT_CONFIGURATION)

View file

@ -6,15 +6,20 @@ import logging
import pkg_resources
import uuid
from openflexure_microscope.stage.base import BaseStage
from openflexure_microscope.stage.mock import MockStage
from openflexure_microscope.camera.base import BaseCamera
from openflexure_microscope.camera.mock import MockStreamer
from openflexure_microscope.stage.mock import MissingStage
from openflexure_microscope.camera.mock import MissingCamera
from openflexure_microscope.stage.sanga import SangaStage
try:
from openflexure_microscope.camera.pi import PiCameraStreamer
except ImportError:
logging.warning("Unable to import PiCameraStreamer")
from openflexure_microscope.camera.mock import MissingCamera
from openflexure_microscope.utilities import serialise_array_b64
from openflexure_microscope.config import user_settings
from openflexure_microscope.config import user_settings, user_configuration
from labthings.core.lock import CompositeLock
from labthings.core.utilities import rupdate
class Microscope:
@ -24,20 +29,32 @@ class Microscope:
The camera and stage objects may already be initialised, and can be passed as arguments.
"""
def __init__(self):
# Initial attributes
self.id = uuid.uuid4() #: Microscope UUID
self.name = self.id #: Microscope name (modifiable)
self.fov = [0, 0] #: Microscope field-of-view in stage motor steps
self.camera = None #: Currently connected camera object
self.stage = None #: Currently connected stage object
def __init__(self, settings = user_settings, configuration = user_configuration):
# Store settings and configuration files
self.settings_file = settings
self.configuration_file = configuration
# Initialise with an empty composite lock
#: :py:class:`labthings.lock.CompositeLock`: Composite lock for locking both camera and stage
self.lock = CompositeLock([])
self.camera = None #: Currently connected camera object
self.stage = None #: Currently connected stage object
self.setup(self.configuration_file.load()) # Attach components
# Apply settings loaded from file
self.apply_settings(user_settings.load())
self.update_settings(self.settings_file.load())
# Initial attributes
if self.configuration_file.load().get("id"):
self.id = configuration.get("id")
else:
self.id = uuid.uuid4()
self.configuration_file.save({
"id": self.id
})
self.name = self.id
def __enter__(self):
"""Create microscope on context enter."""
@ -56,58 +73,49 @@ class Microscope:
self.stage.close()
logging.info("Closed {}".format(self))
def attach(self, camera: BaseCamera, stage: BaseStage):
def setup(self, configuration):
"""
Retroactively attaches a camera and stage to the microscope object.
Allows the microscope to be created as a "dummy", with hardware communications
opened at a later time.
Args:
camera (:py:class:`openflexure_microscope.camera.base.BaseCamera`): camera object
stage (:py:class:`openflexure_microscope.stage.base.BaseStage`): stage object
Attach microscope components based on initially passed configuration file
"""
settings_full = self.read_settings()
### Detector
if configuration.get("detector"):
detector_type = configuration["detector"].get("type")
if detector_type == "PiCamera" or detector_type == "PiCameraStreamer":
try:
self.camera = PiCameraStreamer()
except Exception as e:
logging.error(e)
logging.warning("No compatible camera hardware found.")
logging.debug("Attaching camera...")
self.camera = (
camera
) #: :py:class:`openflexure_microscope.camera.base.BaseCamera`: Picamera object
### Stage
if configuration.get("stage"):
stage_type = configuration["stage"].get("type")
stage_port = configuration["stage"].get("port")
if stage_type == "SangaBoard" or detector_type == "SangaStage":
try:
self.stage = SangaStage(port=stage_port)
except Exception as e:
logging.error(e)
logging.warning("No compatible stage hardware found.")
### Fallbacks
if not self.camera:
logging.info("No camera attached.")
else:
logging.info("Attached camera {}".format(camera))
if hasattr(self.camera, "lock"): # If camera has a lock
logging.info("Attaching {} to composite lock.".format(self.camera.lock))
# Add the lock to the microscope composite lock
self.lock.locks.append(self.camera.lock)
logging.debug("Attaching stage...")
self.stage = (
stage
) #: :py:class:`openflexure_microscope.stage.base.BaseStage`: OpenFlexure stage object
self.camera = MissingCamera()
if not self.stage:
logging.info("No stage attached.")
else:
logging.info("Attached stage {}".format(stage))
self.stage = MissingStage()
if hasattr(self.stage, "lock"): # If stage object has a lock
logging.info(
"Attaching lock {} to composite lock.".format(self.stage.lock)
)
# Add the lock to the microscope composite lock
self.lock.locks.append(self.stage.lock)
logging.info("Reapplying settings to newly attached devices")
self.apply_settings(settings_full)
### Locks
if hasattr(self.camera, "lock"):
self.lock.locks.append(self.camera.lock)
if hasattr(self.stage, "lock"):
self.lock.locks.append(self.stage.lock)
def has_real_stage(self) -> bool:
"""
Check if a real (non-mock) stage is currently attached.
"""
if hasattr(self, "stage") and not isinstance(self.stage, MockStage):
if hasattr(self, "stage") and not isinstance(self.stage, MissingStage):
return True
else:
return False
@ -116,27 +124,26 @@ class Microscope:
"""
Check if a real (non-mock) camera is currently attached.
"""
if hasattr(self, "camera") and not isinstance(self.camera, MockStreamer):
if hasattr(self, "camera") and not isinstance(self.camera, MissingCamera):
return True
else:
return False
# Create unified status
@property
def status(self):
def state(self):
"""Dictionary of the basic microscope status.
Return:
dict: Dictionary containing complete microscope status
"""
state = {
"camera": self.camera.status,
"stage": self.stage.status,
"version": pkg_resources.get_distribution("openflexure_microscope").version,
"camera": self.camera.state,
"stage": self.stage.state,
}
return state
def apply_settings(self, config: dict):
def update_settings(self, config: dict):
"""
Applies a settings dictionary to the microscope. Missing parameters will be left untouched.
"""
@ -144,21 +151,19 @@ class Microscope:
# If attached to a camera
if ("camera_settings" in config) and self.camera:
self.camera.apply_settings(config["camera_settings"])
self.camera.update_settings(config["camera_settings"])
# If attached to a stage
if ("stage_settings" in config) and self.stage:
self.stage.apply_settings(config["stage_settings"])
self.stage.update_settings(config["stage_settings"])
# Todo: tidy up with some loopy goodness
if "id" in config:
self.id = config["id"]
if "name" in config:
self.name = config["name"]
if "fov" in config:
self.fov = config["fov"]
def read_settings(self, json_safe=False):
def read_settings(self, full: bool=True):
"""
Get an updated settings dictionary.
@ -169,7 +174,7 @@ class Microscope:
don't get removed from the settings file.
"""
settings_current = {"id": self.id, "name": self.name, "fov": self.fov}
settings_current = {"name": self.name, "fov": self.fov}
# If attached to a camera
if self.camera:
@ -181,9 +186,12 @@ class Microscope:
settings_current_stage = self.stage.read_settings()
settings_current["stage_settings"] = settings_current_stage
settings_full = user_settings.merge(settings_current)
settings_full = self.settings_file.merge(settings_current)
return settings_full
if full:
return settings_full
else:
return settings_current
def save_settings(self):
"""
@ -196,7 +204,7 @@ class Microscope:
self.camera.save_settings()
if self.stage:
self.stage.save_settings()
user_settings.save(current_config, backup=True)
self.settings_file.save(current_config, backup=True)
@property
def metadata(self):
@ -204,10 +212,10 @@ class Microscope:
Microscope system metadata, to be applied to basically all captures
"""
system_metadata = {
"microscope_settings": self.read_settings(),
"microscope_state": self.status,
"microscope_id": self.id,
"microscope_name": self.name,
"@ID": self.id,
"settings": self.read_settings(full=False),
"state": self.state,
"configuration": self.configuration
}
# Store an encoded copy of the PiCamera lens shading table, if it exists
@ -217,10 +225,32 @@ class Microscope:
b64_string, dtype, shape = serialise_array_b64(lst_arr)
system_metadata["lens_shading_table"] = {
system_metadata["configuration"]["detector"]["lens_shading_table"] = {
"b64_string": b64_string,
"dtype": dtype,
"shape": shape,
}
return system_metadata
@property
def configuration(self):
initial_configuration = self.configuration_file.load()
current_configuration = {
"@application": {
"name": "openflexure_microscope",
"version": pkg_resources.get_distribution("openflexure_microscope").version
},
"stage": {
"type": self.stage.__class__.__name__,
**self.stage.configuration
},
"detector": {
"type": self.camera.__class__.__name__,
**self.camera.configuration
}
}
initial_configuration.update(current_configuration)
return initial_configuration

View file

@ -0,0 +1,17 @@
{
"microscope": {
"stepsPerView": [4100, 3146]
},
"detector": {
"type": "PiCamera"
},
"stage": {
"type": "SangaStage",
"port": null
},
"lightSource": {
"type": "LED"
},
"objective": {
}
}

View file

@ -1,7 +1,3 @@
{
"fov": [
4100,
3146
],
"jpeg_quality": 75
"jpeg_quality": 100
}

View file

@ -32,8 +32,9 @@ def logs_file_path(filename: str):
HERE = os.path.abspath(os.path.dirname(__file__))
#: Path of default (first-run) microscope settings
DEFAULT_CONFIG_FILE_PATH = os.path.join(HERE, "microscope_settings.default.json")
DEFAULT_SETTINGS_FILE_PATH = os.path.join(HERE, "microscope_settings.default.json")
#: Path of default (first-run) microscope configuration
DEFAULT_CONFIGURATION_FILE_PATH = os.path.join(HERE, "microscope_configuration.default.json")
# BASE PATHS
@ -60,7 +61,9 @@ else:
# SERVER PATHS
#: Path of microscope settings directory
CONFIG_FILE_PATH = settings_file_path("microscope_settings.json")
#: Path of microscope settings file
SETTINGS_FILE_PATH = settings_file_path("microscope_settings.json")
#: Path of microscope configuration file
CONFIGURATION_FILE_PATH = settings_file_path("microscope_configuration.json")
#: Path of microscope extensions directory
OPENFLEXURE_EXTENSIONS_PATH = extensions_file_path("microscope_extensions")

View file

@ -14,7 +14,7 @@ class BaseStage(metaclass=ABCMeta):
self.lock = StrictLock(timeout=5)
@abstractmethod
def apply_settings(self, config: dict):
def update_settings(self, config: dict):
"""Update settings from a config dictionary"""
pass
@ -29,12 +29,14 @@ class BaseStage(metaclass=ABCMeta):
@property
@abstractmethod
def status(self):
"""The general state dictionary of the board.
Should at least contain 'position', and 'board' keys.
Note: A None/Null value for 'board' will disable stage
movement in the OpenFlexure eV client software,
"""
def state(self):
"""The general state dictionary of the board."""
pass
@property
@abstractmethod
def configuration(self):
"""The general stage configuration."""
pass
@property

View file

@ -7,7 +7,7 @@ import time
import logging
class MockStage(BaseStage):
class MissingStage(BaseStage):
def __init__(self, port=None, **kwargs):
BaseStage.__init__(self)
self._position = [0, 0, 0]
@ -17,19 +17,17 @@ class MockStage(BaseStage):
self.axis_names = ["x", "y", "z"] # Assume all sangaboards are 3 axis
@property
def status(self):
def state(self):
"""The general status dictionary of the board."""
status = {
"position": self.position_map,
"board": None,
"firmware": None,
"version": None,
}
status = {"position": self.position_map}
return status
def apply_settings(self, config: dict):
"""Update settings from a config dictionary"""
@property
def configuration(self):
return {}
def update_settings(self, config: dict):
"""Update settings from a config dictionary"""
# Set backlash. Expects a dictionary with axis labels
if "backlash" in config:
# Construct backlash array

View file

@ -23,6 +23,7 @@ class SangaStage(BaseStage):
"""Class managing serial communications with the motors for an Openflexure stage"""
BaseStage.__init__(self)
self.port = port
self.board = Sangaboard(port, **kwargs)
self._backlash = (
@ -31,14 +32,17 @@ class SangaStage(BaseStage):
self.axis_names = ["x", "y", "z"] # Assume all sangaboards are 3 axis
@property
def status(self):
def state(self):
"""The general status dictionary of the board."""
status = {
"position": self.position_map,
return {"position": self.position_map}
@property
def configuration(self):
return {
"port": self.port,
"board": self.board.board,
"firmware": self.board.firmware,
}
return status
@property
def n_axes(self):
@ -81,7 +85,7 @@ class SangaStage(BaseStage):
else:
self._backlash = np.array([int(blsh)] * self.n_axes, dtype=np.int)
def apply_settings(self, config: dict):
def update_settings(self, config: dict):
"""Update settings from a config dictionary"""
# Set backlash. Expects a dictionary with axis labels