/*********************************************************
Voltammetry example
**********************************************************/

#include <Wire.h>

int i;
int trial;
int start;
int diff;
float a;
float b;

#define timeOff 10
#define timeOn 20
const float cumRatioMin = 0.2f;
const float cumRatioMax = 0.7f;


void setup() {
  Serial.begin(9600);

  while (!Serial) { // needed to keep leonardo/micro from starting too fast!
    delay(10);
  }
  i = 0;
  trial = 0;
  diff = 0;
  a = 0;
  b = 0;
}
bool fail;

void loop() {
  byte digi;
  i++;
  if (i < timeOff)
  {
    // 2 second off
    digitalWrite(2, LOW);
    digi = 0;
    fail = false;
    a = 0;
    b = 0;
  }
  else if (i == timeOff)
  {
    
    digitalWrite(2, HIGH);
    start = analogRead(A0);    
    //Serial.print(trial);
    //Serial.print("\t");
    //Serial.print(start);
    //Serial.print("\t");
    a = a + start;
  }
  else if(i < timeOff+timeOn)
  {
    // 2 seconds on
    int current = analogRead(A0);
    //Serial.print(current); 
    //Serial.print("\t");

    if (i < timeOff+5)
    {
      a = a + current;
    }
    else if (i >= timeOff+10 && i < timeOff+15)
    {
      b = b + current;
    }
    
  }    
  else if (i == timeOff+timeOn)
  {
    int current = analogRead(A0);
    //Serial.println(current); 
    digitalWrite(2, LOW);
    if (a>0)
    {
      float ratio = b/a;
      if (ratio < cumRatioMax && ratio > cumRatioMin)
      {
        Serial.println("Cum!!"); 
      }
      Serial.println(b/a); 
    }
  }
  else
  {
    i = 0;
    digi = 0;
    diff = 0;
    trial++;
    a = 0;
    b = 0;
  }

  if (trial > 1024)
  {
    trial = 0;
  }
  
  delay(10);
}