File content as of revision 1:08ca9b208045:

/*
 * StateMachine.h
 * Copyright (c) 2017, ZHAW
 * All rights reserved.
 */

#ifndef STATE_MACHINE_H_
#define STATE_MACHINE_H_

#include <cstdlib>
#include <mbed.h>
#include "Controller.h"
#include "IRSensor.h"

#include <deque>
#include "Task.h"
#include "TaskWait.h"
#include "TaskMoveTo.h"

/**
 * This class implements a simple state machine for a mobile robot.
 * It allows to move the robot forward, and to turn left or right,
 * depending on distance measurements, to avoid collisions with
 * obstacles.
 */
class StateMachine {
    
    public:
        
        static const int   ROBOT_OFF = 0;   // discrete states of this state machine
        static const int   MOVE_FORWARD = 1;
        static const int   TURN_LEFT = 2;
        static const int   TURN_RIGHT = 3;
        static const int   SLOWING_DOWN = 4;
        
                    StateMachine(Controller& controller, DigitalOut& enableMotorDriver, DigitalOut& led0, DigitalOut& led1, DigitalOut& led2, DigitalOut& led3, DigitalOut& led4, DigitalOut& led5, DigitalIn& button, IRSensor& irSensor0, IRSensor& irSensor1, IRSensor& irSensor2, IRSensor& irSensor3, IRSensor& irSensor4, IRSensor& irSensor5);
        virtual     ~StateMachine();
        int         getState();
        
    private:
        
        static const float PERIOD;                  // period of task in [s]
        static const float DISTANCE_THRESHOLD;      // minimum allowed distance to obstacle in [m]
        static const float TRANSLATIONAL_VELOCITY;  // translational velocity in [m/s]
        static const float ROTATIONAL_VELOCITY;     // rotational velocity in [rad/s]
        
        Controller&     controller;
        DigitalOut&     enableMotorDriver;
        DigitalOut&     led0;
        DigitalOut&     led1;
        DigitalOut&     led2;
        DigitalOut&     led3;
        DigitalOut&     led4;
        DigitalOut&     led5;
        DigitalIn&      button;
        IRSensor&       irSensor0;
        IRSensor&       irSensor1;
        IRSensor&       irSensor2;
        IRSensor&       irSensor3;
        IRSensor&       irSensor4;
        IRSensor&       irSensor5;
        int             state;
        int             buttonNow;
        int             buttonBefore;
        Ticker          ticker;
        
        void            run();
        
        deque<Task*> taskList;
};

#endif /* STATE_MACHINE_H_ */