File content as of revision 52:eaddbde192f1:

#ifndef __ALARMCONTROLLER_H__
#define __ALARMCONTROLLER_H__

#include "mbed.h"
#include "SensorController.h"
#include "PIDController.h"
#include "testing.h"

/** The number of iterations before the AlarmController registers unsafe values */
#define STARTUP_ITERATIONS 10

/** The AlarmController monitors the Temperature/Salinity/Proximity sensors and registers unsafe values.
 * After a specified amount of time an alarm is raised by means of a buzzer.
 */
class AlarmController  : public Controller {

    
    public:
    
        /** Contructs a new AlarmController which monitors the given Temperature/Salinity/Proximity controllers. */
        AlarmController(bool threaded, int interval_ms, SensorController *temp, SensorController *salt, SensorController *proximity)
         : Controller(threaded, interval_ms) {
            this->temp = temp;
            this->salt = salt;
            this->proximity = proximity;     
            
            this->error = false;
            this->tempiscrit = false;
            this->saltiscrit = false;
            this->overflowiscrit = false;            
        }
        
        /** Overrides update() in the Controller class */
        virtual void update();
        
        /** Overrides get_name() in the Controller class */
        virtual std::string get_name();
        
        /** Return \a true if there is an error condition and the alarm was raised. */
        bool is_error();
        
        /** Returns a message describing the last error */
        char *get_error_message();

    
    private:
        SensorController *temp;
        SensorController *salt;
        SensorController *proximity;        
        
        bool error;
        char *error_msg;       

        /** Activates the buzzer */
        void buzzOnce();
        
        /** Activates an alarm for the temperature controller */
        void raiseAlarmTemp(bool);
        
        /** Activates an alarm for the salinity controller */
        void raiseAlarmSalt(bool);
        
        /** Activates an alarm for the proximity controller */
        void raiseAlarmOverFlow(bool);
                
        bool tempiscrit;
        bool saltiscrit;
        bool overflowiscrit;
        
        Timer temptimer;
        Timer salttimer;
        Timer overflowtimer;
        
};


#endif