src/antlion/controllers/relay_lib/power_supply.py

#!/usr/bin/env python3
#
# Copyright 2022 The Fuchsia Authors
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import time
import enum

from antlion.controllers.relay_lib.devices.bluetooth_relay_device import BluetoothRelayDevice

POWER_TOGGLE_WAIT_TIME = 0.5

class Buttons(enum.Enum):
    POWER = 'Power'


class PowerSupply(BluetoothRelayDevice):
    """Power Supply for Headset.

    Wraps the button presses.
    """
    def __init__(self, config, relay_rig):
        BluetoothRelayDevice.__init__(self, config, relay_rig)
        self._ensure_config_contains_relays(button.value for button in Buttons)

    def _hold_button(self, button, seconds):
        self.hold_down(button.value)
        time.sleep(seconds)
        self.release(button.value)

    def power_off(self):
        self._hold_button(Buttons.POWER, POWER_TOGGLE_WAIT_TIME)

    def setup(self):
        """Do nothing, since this is not a headset"""
        return True

    def clean_up(self):
        """Do nothing, since this is not a headset"""
        return True