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#!/usr/bin/env python3
# SPDX-FileCopyrightText: All Contributors to the PyTango project
# SPDX-License-Identifier: LGPL-3.0-or-later
"""
Power supply device that connects to a "hardware" simulator
provided by ps-simulator.py. Launch the ps-simulator.py script
before starting this device server.
"""
from time import sleep
from socket import create_connection
from tango.server import Device, attribute, command, device_property
def connect(host, port):
sock = create_connection((host, port))
return sock.makefile("rwb", newline=b"\n", buffering=0)
def write_readline(conn, msg):
conn.write(msg)
return conn.readline()
class PowerSupply(Device):
host = device_property(str, default_value="localhost")
port = device_property(int, default_value=45000)
def init_device(self):
super().init_device()
self.conn = connect(self.host, self.port)
@attribute(dtype=float)
def voltage(self):
return float(write_readline(self.conn, b"VOL?\n"))
@command
def calibrate(self):
write_readline(self.conn, b"CALIB 1\n")
while int(write_readline(self.conn, b"stat?\n")):
sleep(0.1)
if __name__ == "__main__":
PowerSupply.run_server()
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