humidity.h

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/****************************************************************************
** Copyright (C) 2020 MikroElektronika d.o.o.
** Contact: https://www.mikroe.com/contact
**
** 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.
**
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** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
** OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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#ifndef HUMIDITY_H
#define HUMIDITY_H
 
#ifdef __cplusplus
extern "C"{
#endif
 
#ifdef PREINIT_SUPPORTED
#include "preinit.h"
#endif
 
#ifdef MikroCCoreVersion
    #if MikroCCoreVersion >= 1
        #include "delays.h"
    #endif
#endif
 
#include "drv_digital_out.h"
#include "drv_digital_in.h"
#include "drv_analog_in.h"
#include "drv_i2c_master.h"
 
#define HUMIDITY_SET_DEV_ADDR           0x4D
 
#define HUMIDITY_ADC_RESOLUTION         0x0FFF
#define HUMIDITY_VREF_3V3               3.3
#define HUMIDITY_VREF_5V                5.0
 
#define HUMIDITY_DIVISOR                0.00636
#define HUMIDITY_SUBTRAHEND             0.1515
 
 // humidity_set
 
#define HUMIDITY_MAP_MIKROBUS( cfg, mikrobus ) \
    cfg.an = MIKROBUS( mikrobus, MIKROBUS_AN ); \
    cfg.scl = MIKROBUS( mikrobus, MIKROBUS_SCL ); \
    cfg.sda = MIKROBUS( mikrobus, MIKROBUS_SDA )
 
 // humidity_map
 // humidity
 
typedef enum
{
    HUMIDITY_DRV_SEL_ADC,       
    HUMIDITY_DRV_SEL_I2C        
} humidity_drv_t;
 
typedef struct
{
    analog_in_t  adc;           
    i2c_master_t i2c;           
    humidity_drv_t drv_sel;     
    uint8_t slave_address;      
    float   vref;               
} humidity_t;
 
typedef struct
{
    pin_name_t  an;             
    pin_name_t  scl;            
    pin_name_t  sda;            
    uint32_t  i2c_speed;        
    uint8_t   i2c_address;      
    humidity_drv_t          drv_sel;        
    analog_in_resolution_t  resolution;     
    float                   vref;           
} humidity_cfg_t;
 
typedef enum
{
    HUMIDITY_OK = 0,
    HUMIDITY_ERROR = -1
 
} humidity_return_value_t;
 
void humidity_cfg_setup ( humidity_cfg_t *cfg );
 
void humidity_drv_interface_selection ( humidity_cfg_t *cfg, humidity_drv_t drv_sel );
 
err_t humidity_init ( humidity_t *ctx, humidity_cfg_t *cfg );
 
err_t humidity_read_raw_adc ( humidity_t *ctx, uint16_t *raw_adc );
 
err_t humidity_read_voltage ( humidity_t *ctx, float *voltage );
 
err_t humidity_set_vref ( humidity_t *ctx, float vref );
 
float humidity_voltage_to_rh ( humidity_t *ctx, float voltage );
 
#ifdef __cplusplus
}
#endif
#endif // HUMIDITY_H
 
 // humidity
 
// ------------------------------------------------------------------------ END