001package com.pi4j.io.gpio; 002 003import java.util.Map; 004 005/* 006 * #%L 007 * ********************************************************************** 008 * ORGANIZATION : Pi4J 009 * PROJECT : Pi4J :: Java Library (Core) 010 * FILENAME : SimulatedGpioProvider.java 011 * 012 * This file is part of the Pi4J project. More information about 013 * this project can be found here: https://www.pi4j.com/ 014 * ********************************************************************** 015 * %% 016 * Copyright (C) 2012 - 2019 Pi4J 017 * %% 018 * This program is free software: you can redistribute it and/or modify 019 * it under the terms of the GNU Lesser General Public License as 020 * published by the Free Software Foundation, either version 3 of the 021 * License, or (at your option) any later version. 022 * 023 * This program is distributed in the hope that it will be useful, 024 * but WITHOUT ANY WARRANTY; without even the implied warranty of 025 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 026 * GNU General Lesser Public License for more details. 027 * 028 * You should have received a copy of the GNU General Lesser Public 029 * License along with this program. If not, see 030 * <http://www.gnu.org/licenses/lgpl-3.0.html>. 031 * #L% 032 */ 033 034 035/** 036 * A simulator to aid in development of RI Pi systems using a standard PC dev 037 * environment. 038 * 039 * To use the simulator you need two environment variables: 040 * 041 * The standard PI4J platform statement MUST point to the simulator: 042 * 043 * PI4J_PLATFORM=Simulated 044 * 045 * A second environment variable that defines the platform that is to be 046 * simulated. 047 * 048 * SimulatedPlatform=<Real Platform's Name> 049 * 050 * e.g. 051 * 052 * SimultatedPlatform=RaspberryPi GPIO Provider 053 * 054 * If you don't provide a value for theSimulatedPlatform the system assumes that 055 * you want to use the raspberry pi platform: RaspiGpioProvider 056 * 057 * @author bsutton 058 * 059 */ 060public class SimulatedGpioProvider extends GpioProviderBase implements GpioProvider { 061 062 // We use the name of the platform that we are simulating. 063 public static String NAME; 064 065 public SimulatedGpioProvider() { 066 Map<String, String> env = System.getenv(); 067 068 String config = env.get("SimulatedPlatform"); 069 070 // If no specific platform is specified we default to simulating the raspberry pi 071 if (config == null) { 072 NAME = RaspiGpioProvider.NAME; 073 return; 074 } 075 076 NAME = config; 077 } 078 079 @Override 080 public String getName() { 081 return NAME; 082 } 083 084 public void setState(Pin pin, PinState state) { 085 // cache pin state 086 getPinCache(pin).setState(state); 087 088 // dispatch event 089 dispatchPinDigitalStateChangeEvent(pin, state); 090 } 091 092 public void setAnalogValue(Pin pin, double value) { 093 // cache pin state 094 getPinCache(pin).setAnalogValue(value); 095 096 // dispatch event 097 dispatchPinAnalogValueChangeEvent(pin, value); 098 } 099 100}