import numpy as np

XY_DEVICE = None
Z_DEVICE = None

X_AXIS = None  # object structure: (device, channel, arduino pin, axis index)
Y_AXIS = None
Z_AXIS = None

AXES = None  # list containing [X_AXIS, Y_AXIS, Z_AXIS]

# Constants:
COIL_CONST = np.array([38.6, 38.45, 37.9]) * 1e-6  # Coil constants [x,y,z] in T/A
AMBIENT_FIELD = np.array([80, 80, 80]) * 1e-6  # ambient magnetic field in measurement area, to be cancelled out
RESISTANCES = np.array([4.5, 8, 4])  # resistance of [x,y,z] circuits
MAX_WATTS = np.array([8, 25, 8])  # max. allowed power for [x,y,z] circuits
MAX_VOLTS = [16, 16, 16]  # max. allowed voltage, limited to 16V by used diodes!

# COM-Ports for power supply units:
XY_PORT = "COM10"   # placeholders
Z_PORT = "COM11"

AXIS_NAMES = ["X-Axis", "Y-Axis", "Z-Axis"]
ports = [XY_PORT, XY_PORT, Z_PORT]

ARDUINO = None

RELAY_PINS = [15, 16, 17]  # pin on the Arduino for switching relay of each axis [x,y,z]

app = None

# ToDo: make proper settings file to read from and write to