EVs_NXTVoltMeter.h

//EVs_NXTVoltMeter.h
//
// This is a class for reading from NXTVoltMeter, made by Mindsensors.
// See http://www.mindsensors.com/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=162

// Initial version: 2013-01-24 by Michael Giles
// Modified for EVShield: 2015-2-16 by Michael Giles
// Large parts of the code is ported from the NXC library for the device,
// written by Deepak Patil.
/*
  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef EVs_NXTVoltMeter_H
#define EVs_NXTVoltMeter_H

#define VM_Command      0x41

#define ABSOLUTE_V      0X43
#define RELATIVE_V      0x45

#define REFERENCE_V     0X47

#include        "EVShieldI2C.h"
class EVs_VoltMeter : public EVShieldI2C
{
public:
        EVs_VoltMeter(uint8_t i2c_address = 0x26);
        uint8_t issueCommand(char command);
        int     getAVoltage();
        int     getRVoltage();
        int     getReference();
        int     setReferenceV();

};

#endif