SalinitySensor.cpp

00001 /*
00002 * G3: WATERPLAY
00003 */
00004 
00005 #include "SalinitySensor.h"
00006 #include "mbed.h"
00007 #include <algorithm>
00008 #include "Printer.h"
00009 
00010 SalinitySensor::SalinitySensor(
00011     Printer &printer,
00012     PinName pin
00013 ):
00014     _printer(printer),
00015     _analog_in(pin),
00016     _reading(0.0),
00017     _voltage(0.0),
00018     _salinity(0.0),
00019     _status(0.0),
00020     _strStatus("OK"),
00021     _in_boundary(false),
00022     _in_danger(false)
00023 {
00024     this->reload();
00025 }
00026 
00027 void SalinitySensor::reload()
00028 {
00029     double readings[SAMPLING_NUMBER];
00030     
00031     for(int counter = 0; counter < SAMPLING_NUMBER; ++counter){
00032         // the reading from sensor.
00033         readings[counter] = this->_analog_in.read();
00034     }
00035 
00036     sort(readings, readings + SAMPLING_NUMBER);
00037     
00038     this->_reading = readings[SAMPLING_NUMBER / 2];
00039     
00040     // converted voltage.
00041     this->_voltage = 
00042         this->_reading *
00043         VIN *
00044         CONVERTER;
00045     // the salinity value.
00046     this->_salinity = 
00047         this->_voltage *
00048         MULTIPLIER;
00049     
00050     
00051     this->_in_boundary = false;
00052     if(this->_salinity > 0.25){
00053        this->_salinity += VARIANCE;
00054        this->_in_boundary = true;
00055     }
00056     this->_status = 0.0;
00057     this->_strStatus = "OK";
00058     if(this->_salinity < LOWER_BOUNDARY){
00059         this->_status = this->_salinity - LOWER_BOUNDARY;
00060         this->_strStatus = "LW";
00061     } else if(this->_salinity > UPPER_BOUNDARY){
00062         this->_status = this->_salinity - UPPER_BOUNDARY;
00063         this->_strStatus = "HI";
00064     }
00065 }
00066 
00067 double SalinitySensor::getReading()
00068 {
00069     return(this->_reading);
00070 }
00071 
00072 double SalinitySensor::getVoltage()
00073 {
00074     return(this->_voltage);
00075 }
00076 
00077 double SalinitySensor::getSalinity()
00078 {
00079     return(this->_salinity);
00080 }
00081 
00082 double SalinitySensor::getStatus()
00083 {
00084     return(this->_status);
00085 }
00086 
00087 char* SalinitySensor::getStrStatus()
00088 {
00089     return(this->_strStatus);
00090 }
00091 
00092 bool SalinitySensor::inBoundary()
00093 {
00094     return(this->_in_boundary);
00095 }
00096 
00097 bool SalinitySensor::inDanger()
00098 {
00099     bool in_danger = false;
00100     if(this->_in_boundary && this->_salinity != 0.0){
00101         in_danger = true;
00102     }
00103     return(in_danger);
00104 }