nightshade-energyshield.cpp

/*
   NS_energyShield - Library for interfacing with NightShade Electronic's energyShield, rev 8.
   Created by Aaron D. Liebold on August 8, 2014.
   Released into the public domain.

   v1.0
*/

#include "nightshade-energyshield.h"


NS_energyShield::NS_energyShield()
{
  //Wire.begin();   //Begins TwoWire interface
  _address = 0b00110110;
}

// Tell library if fuel gauge has non-default address
void NS_energyShield::address(char address)
{
  _address = address;
}

int NS_energyShield::voltage()
{
    byte voltageHB = 0x0;
    byte voltageLB = 0x0;
    int V;

    Wire.beginTransmission(_address);
    Wire.write(0x0C);
    Wire.endTransmission(false);
    Wire.requestFrom(_address,2);
    voltageHB = Wire.read();
    voltageLB = Wire.read();

    V = (unsigned long) ((voltageHB << 5) + (voltageLB >> 3))*122/100;

    return V; // Returns voltage in mV
}

int NS_energyShield::current()
{
    int Iraw;
    byte currentHB = 0x0;
    byte currentLB = 0x0;

    // Reads high and low chars of the register
    Wire.beginTransmission(_address);
    Wire.write(0x0E);
    Wire.endTransmission(false);
    Wire.requestFrom(_address,2);
    currentHB = Wire.read();
    currentLB = Wire.read();

    Iraw = (long) (((currentHB << 8) + currentLB) >> 4)*5/4; // Merges high and low bytes and applies 1.25 mA/unit conversion

    return Iraw; // Returns current in mA
}

int NS_energyShield::percent()
{
    byte stateOfCharge;

    Wire.beginTransmission(_address);
    Wire.write(0x02);
    Wire.endTransmission(false);
    Wire.requestFrom(_address,1);
    stateOfCharge = Wire.read();

    return stateOfCharge; // Returns percent of battery charge in 0.5% increments (1/200)
}


int NS_energyShield::temperature()
{
    int T;
    byte tempHB = 0x0;
    byte tempLB = 0x0;

    // Reads high and low chars of the register
    Wire.beginTransmission(_address);
    Wire.write(0x0A);
    Wire.endTransmission(false);
    Wire.requestFrom(_address,2);
    tempHB = Wire.read();
    tempLB = Wire.read();

    T = tempHB*8 + tempLB/32; // Combines high and low bytes

    return T; // Returns temperature in increments of 0.125 degrees C
}

int NS_energyShield::Vadp(int pin)
{
    int V = (unsigned long) analogRead(pin)*25000/1023;
    return V;
}