File content as of revision 0:0949c00010ff:

/* Project: Data Fitting Code
Description: Base functionality for lighting controller.

Author: Alex Mueller and Marissa Gore
Date: 10/18/2020

*/

//Includes
#include "mbed.h"               //includes mbed header file
#include "LCD_DISCO_L476VG.h"   //includes LCD libraries
#include <stdio.h>              //includes studio header file
#include <fstream>              //include file handing library


DigitalOut Ctrl(PA_2);              //Controls relay
DigitalIn button(PA_0);             //Push button changes display mode
AnalogIn ain(PA_1);                 //Sensor

LCD_DISCO_L476VG lcd;

//Global variables
float sampledData[10000];
int numDataSamples = 0;
//int StateEx = 1;

//Initalize functions
void SensorValues(float value);
void Timer();                    //not done
int PersonId();
int PeakLocation();
void Counter(int count);
void Status();
//void DisplayHandler(int count);

int main()
{
    float value;
    bool incident = false; 
    float baseline = 65;             //75cm
    int count = 0;
    int person;
    uint8_t DisplayedString[7] = {0};

   while(1)
   {
//       printf("%i\n", count*50);
//       DisplayHandler(count);
       value = 30 * pow(ain.read(), -1.173);
       printf("%f \n", value);
       if(value < baseline)
       {
           incident = true;
           SensorValues(value);
        }
        else if(incident == true && value >= baseline)
        {
            person = PersonId();
            if(person == 1)
            {
                Ctrl = 1;           //change to set low to turn on relay
                count++;
                Counter(count);
            }
            else if(person == 0)
            {
                count--;
                Counter(count);
                if(count == 0)
                {
                    Ctrl = 0;       //change to set high to turn off relay
                }
            }
            incident = false;
            numDataSamples = 0;
        }
        ThisThread::sleep_for(5);
    }  
}      

void SensorValues(float value)
{
   sampledData[numDataSamples] = value;
   numDataSamples++;
}   

////void Timer()
////{
////    pizza
////}

int PeakLocation()
{
    int min = sampledData[0];     
    int saveLow;        
    for (int i = 1; i < numDataSamples; ++i)       
    {
        if(sampledData[i] < min)         
        {   
            min = sampledData[i];    
            saveLow = i;      
        }   
    }
    return saveLow;   
}

int PersonId()
{
    int lowest = PeakLocation();
    
    if(lowest < (numDataSamples*(1/2 - 0.1)))        // Lowest < midpoint - 10%
    {
        return -1;
    }
    else if(lowest > (numDataSamples*(1/2 + 0.1)))  // Lowest > midpoint + 10%
    {
        return 1;
    }
    else
    {
        return 0;
    }
}

void Counter(int count)
{
    lcd.Clear();
    uint8_t DisplayedString[7] = {0};
    sprintf((char *)DisplayedString, "%d\n", count);
    lcd.DisplayString(DisplayedString);
    
//    if(button == 1)
//    {
//    StateEx =2;
//    }
}

//void Status()
//{
//    lcd.Clear();
//    if(Ctrl == 1)
//    {
//         lcd.DisplayString((uint8_t *)"OFF");
//    }
//    if(Ctrl == 0)
//    {
//         lcd.DisplayString((uint8_t *)"ON");  
//    }
//    if(button == 1)
//    {
//    StateEx =1;
//    }
//}

//void DisplayHandler(int count)
//{
//        switch(StateEx)
//        {
//            case PersonCount: Counter(count);
//                            break;
//            case LEDstatus: Status(); 
//                            break;
//            case ErrorState: printf("Error the cookie monster is going to eat you"); 
//                            break;
//        }
//        wait(0.1);
//}