Seeed_MCP9808.h

/*
    Seeed_MCP9808.h
    Driver for DIGITAL I2C HUMIDITY AND TEMPERATURE SENSOR

    Copyright (c) 2018 Seeed Technology Co., Ltd.
    Website    : www.seeed.cc
    Author     : downey
    Create Time: May 2018
    Change Log :

    The MIT License (MIT)

    Permission is hereby granted, free of charge, to any person obtaining a copy
    of this software and associated documentation files (the "Software"), to deal
    in the Software without restriction, including without limitation the rights
    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
    copies of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
    THE SOFTWARE.
*/
#ifndef _SEEED_MCP9808_H
#define _SEEED_MCP9808_H

#include <Wire.h>
#include <Arduino.h>



#ifndef SEEED_DN_DEFINES
#define SEEED_DN_DEFINES

#ifdef ARDUINO_SAMD_VARIANT_COMPLIANCE
    #define SERIAL_DB SerialUSB
#else
    #define SERIAL_DB Serial
#endif


typedef int            s32;
typedef long unsigned int   u32;
typedef short          s16;
typedef unsigned short u16;
typedef char           s8;
typedef unsigned char  u8;

typedef enum {
    NO_ERROR = 0,
    ERROR_PARAM = -1,
    ERROR_COMM = -2,
    ERROR_OTHERS = -128,
} mcp9808_err_t;


#define CHECK_RESULT(a,b)   do{if(a=b)  {    \
            SERIAL_DB.print(__FILE__);    \
            SERIAL_DB.print(__LINE__);   \
            SERIAL_DB.print(" error code =");  \
            SERIAL_DB.println(a);                   \
            return a;   \
        }}while(0)

#endif

#define SET_CONFIG_ADDR           0X01
#define SET_UPPER_LIMIT_ADDR      0X02
#define SET_LOWER_LIMIT_ADDR      0X03
#define SET_CRITICAL_LIMIT_ADDR   0X04

#define AMBIENT_TEMPERATURE_ADDR  0X05
#define SET_RESOLUTION_ADDR       0X08


#define DEFAULT_IIC_ADDR  0X18


#define RESOLUTION_0_5_DEGREE               0
#define RESOLUTION_0_25_DEGREE              0X01
#define RESOLUTION_0_125_DEGREE             0X02
#define RESOLUTION_0_0625_DEGREE            0X03
#define SIGN_BIT                            0X10

class MCP_IIC_OPRTS {
  public:
    void IIC_begin() {
        Wire.begin();
    }
    s32 IIC_write_byte(u8 reg, u8 byte);
    void IIC_read_byte(u8 reg, u8* byte);
    void set_iic_addr(u8 IIC_ADDR);
    void IIC_read_16bit(u8 start_reg, u16* value);
    s32 IIC_write_16bit(u8 reg, u16 value);
  private:
    u8 _IIC_ADDR;
};



class MCP9808: public MCP_IIC_OPRTS {
  public:
    MCP9808(u8 IIC_ADDR = DEFAULT_IIC_ADDR);
    ~MCP9808() {};
    s32 init();
    s32 set_config(u8 addr, u16 cfg);
    s32 set_upper_limit(u8 addr, u16 cfg);
    s32 set_lower_limit(u8 addr, u16 cfg);
    s32 set_critical_limit(u8 addr, u16 cfg);
    s32 read_temp_reg(u8 addr, u16* temp);
    void get_temp(float* temp);
    s32 set_resolution(u8 addr, u8 resolution);
  private:
    float caculate_temp(u16 temp);
};




#endif