content: /*************************************************************************
  *                                                                        *
  *  This file is part of the 20n/act project.                             *
  *  20n/act enables DNA prediction for synthetic biology/bioengineering.  *
  *  Copyright (C) 2017 20n Labs, Inc.                                     *
  *                                                                        *
  *  Please direct all queries to act@20n.com.                             *
  *                                                                        *
  *  This program is free software: you can redistribute it and/or modify  *
  *  it under the terms of the GNU General Public License as published by  *
  *  the Free Software Foundation, either version 3 of the License, or     *
  *  (at your option) any later version.                                   *
  *                                                                        *
  *  This program is distributed in the hope that it will be useful,       *
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *  GNU General Public License for more details.                          *
  *                                                                        *
  *  You should have received a copy of the GNU General Public License     *
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  *                                                                        *
  *************************************************************************/
  
  package com.twentyn.bioreactor.pH;
  
  import com.pi4j.io.gpio.GpioController;
  import com.pi4j.io.gpio.GpioFactory;
  import com.pi4j.io.gpio.GpioPinDigitalOutput;
  import com.pi4j.io.gpio.PinState;
  import com.pi4j.io.gpio.RaspiPin;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  
  public class MotorPinConfiguration {
  
    private static final Logger LOGGER = LogManager.getFormatterLogger(MotorPinConfiguration.class);
  
    public enum PinNumberingScheme {
      BOARD,
      // TODO: Implement BCM pin configuration
      BCM
    }
  
    private PinNumberingScheme scheme;
    private GpioController gpioController;
    private GpioPinDigitalOutput pumpReversePin;
    private GpioPinDigitalOutput pumpForwardPin;
    private GpioPinDigitalOutput pumpEnablePin;
  
    public MotorPinConfiguration(PinNumberingScheme scheme) {
      this.scheme = scheme;
    }
  
    public void initializeGPIOPinsAndSetConfigToStartState() {
      if (this.scheme == PinNumberingScheme.BOARD) {
        gpioController = GpioFactory.getInstance();
        pumpReversePin = gpioController.provisionDigitalOutputPin(RaspiPin.GPIO_00, "ReverseMode", PinState.LOW);
        pumpForwardPin = gpioController.provisionDigitalOutputPin(RaspiPin.GPIO_01, "ForwardMode", PinState.LOW);
        pumpEnablePin = gpioController.provisionDigitalOutputPin(RaspiPin.GPIO_07, "PumpEnable", PinState.LOW);
  
        // set shutdown state for pins
        pumpReversePin.setShutdownOptions(true, PinState.LOW);
        pumpForwardPin.setShutdownOptions(true, PinState.LOW);
        pumpEnablePin.setShutdownOptions(true, PinState.LOW);
  
        // Set mode to be forward
        pumpForwardPin.high();
      } else {
        LOGGER.error("We currently do not support any other pin configurations.");
      }
    }
  
    public void shutdownFermentation() {
      gpioController.shutdown();
    }
  
    public GpioController getGpioController() {
      return gpioController;
    }
  
    public GpioPinDigitalOutput getPumpReversePin() {
      return pumpReversePin;
    }
  
    public GpioPinDigitalOutput getPumpForwardPin() {
      return pumpForwardPin;
    }
  
    public GpioPinDigitalOutput getPumpEnablePin() {
      return pumpEnablePin;
    }
  
    public void switchMotorOn() {
      pumpEnablePin.high();
    }
  
    public void switchMotorOff() {
      pumpEnablePin.low();
    }
  }
  