1 /* 2 * Copyright (c) 2016, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.car.hvac; 17 18 import android.car.hardware.CarPropertyConfig; 19 import android.car.hardware.hvac.CarHvacManager; 20 import android.content.Context; 21 22 import java.util.List; 23 24 public class HvacPolicy { 25 private float mMaxHardwareTemp; 26 private float mMinHardwareTemp; 27 private int mMaxHardwareFanSpeed; 28 29 private final boolean mHardwareUsesCelsius; 30 private final boolean mUserUsesCelsius; 31 32 public HvacPolicy(Context context, List<CarPropertyConfig> properties) { 33 //TODO handle max / min per each zone 34 for (CarPropertyConfig config : properties) { 35 switch (config.getPropertyId()) { 36 case CarHvacManager.ID_ZONED_FAN_SPEED_SETPOINT: { 37 mMaxHardwareFanSpeed = (int) config.getMaxValue(); 38 } break; 39 40 case CarHvacManager.ID_ZONED_TEMP_SETPOINT: { 41 mMaxHardwareTemp = (float) config.getMaxValue(); 42 mMinHardwareTemp = (float) config.getMinValue(); 43 } break; 44 } 45 } 46 47 mHardwareUsesCelsius = context.getResources().getBoolean(R.bool.config_hardwareUsesCelsius); 48 mUserUsesCelsius = context.getResources().getBoolean(R.bool.config_userUsesCelsius); 49 } 50 51 public float userToHardwareTemp(int temp) { 52 if (!mUserUsesCelsius && mHardwareUsesCelsius) { 53 return fahrenheitToCelsius(temp); 54 } 55 56 if (mUserUsesCelsius && !mHardwareUsesCelsius) { 57 return celsiusToFahrenheit(temp); 58 } 59 60 return temp; 61 } 62 63 public int hardwareToUserTemp(float temp) { 64 if (mHardwareUsesCelsius && !mUserUsesCelsius) { 65 return (int) celsiusToFahrenheit(temp); 66 } 67 68 if (!mHardwareUsesCelsius && mUserUsesCelsius) { 69 return (int) fahrenheitToCelsius(temp); 70 } 71 72 return (int) temp; 73 } 74 75 private float celsiusToFahrenheit(float c) { 76 return c * 9 / 5 + 32; 77 } 78 79 private float fahrenheitToCelsius(float f) { 80 return (f - 32) * 5 / 9; 81 } 82 83 public int userToHardwareFanSpeed(int speed) { 84 return getMaxHardwareFanSpeed() * speed / 100; 85 } 86 87 public int hardwareToUserFanSpeed(int speed) { 88 return speed * 100 / getMaxHardwareFanSpeed(); 89 } 90 91 public int getMaxHardwareFanSpeed() { 92 return mMaxHardwareFanSpeed; 93 } 94 95 public float getMaxHardwareTemp() { 96 return mMaxHardwareTemp; 97 } 98 99 public float getMinHardwareTemp() { 100 return mMinHardwareTemp; 101 } 102 } 103