MCP9808.h

// -*- C++ -*-
/*
 * Open EVSE Firmware
 *
 * Copyright (c) 2013-2014 Sam C. Lin <lincomatic@gmail.com>
 *
 * This file is part of Open EVSE.

 * Open EVSE is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3, or (at your option)
 * any later version.

 * Open EVSE 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 General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with Open EVSE; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 *
 */
#pragma once
#if (ARDUINO >= 100)
 #include "Arduino.h"
#else
 #include "WProgram.h"
#endif
#include "./Wire.h"


#include "./i2caddr.h"

//n.b. defines copied from Adafruit_MCP9808.h
#define MCP9808_REG_CONFIG             0x01

#define MCP9808_REG_CONFIG_SHUTDOWN    0x0100
#define MCP9808_REG_CONFIG_CRITLOCKED  0x0080
#define MCP9808_REG_CONFIG_WINLOCKED   0x0040
#define MCP9808_REG_CONFIG_INTCLR      0x0020
#define MCP9808_REG_CONFIG_ALERTSTAT   0x0010
#define MCP9808_REG_CONFIG_ALERTCTRL   0x0008
#define MCP9808_REG_CONFIG_ALERTSEL    0x0002
#define MCP9808_REG_CONFIG_ALERTPOL    0x0002
#define MCP9808_REG_CONFIG_ALERTMODE   0x0001

#define MCP9808_REG_UPPER_TEMP         0x02
#define MCP9808_REG_LOWER_TEMP         0x03
#define MCP9808_REG_CRIT_TEMP          0x04
#define MCP9808_REG_AMBIENT_TEMP       0x05
#define MCP9808_REG_MANUF_ID           0x06
#define MCP9808_REG_DEVICE_ID          0x07

class MCP9808 {
  int8_t isPresent;
  int16_t read16(uint8_t reg);

public:
  MCP9808() { isPresent = 0; }
  int8_t begin();

  int16_t readAmbient();
};