dht22.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.
** 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
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#ifndef DHT22_H
#define DHT22_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"
 
#define DHT22_RESP_NOT_READY  0
#define DHT22_RESP_READY      1
 
 // dht22_set
 
#define DHT22_MAP_MIKROBUS( cfg, mikrobus ) \
    cfg.sd1 = MIKROBUS( mikrobus, MIKROBUS_CS ); \
    cfg.sd2 = MIKROBUS( mikrobus, MIKROBUS_INT )
    
 // dht22_map
 // dht22
 
 
typedef enum
{
    DHT22_SDA_SEL_SDA1,
    DHT22_SDA_SEL_SDA2
 
} dht22_sda_sel_t;
 
typedef struct
{
    digital_out_t  sda_out;    
    digital_in_t  sda_in;      
    pin_name_t  sd1;           
    pin_name_t  sd2;           
    dht22_sda_sel_t  sda_sel;  
    err_t  sda_out_stat;      
    err_t  sda_in_stat;       
} dht22_t;
 
typedef struct
{
    // Data pin descriptors
 
    pin_name_t  sd1;    
    pin_name_t  sd2;    
    dht22_sda_sel_t  sda_sel;    
} dht22_cfg_t;
 
 
typedef enum
{
    DHT22_OK = 0,
    DHT22_ERROR = -1
 
} dht22_return_value_t;
 
void dht22_cfg_setup ( dht22_cfg_t *cfg );
 
err_t dht22_init ( dht22_t *ctx, dht22_cfg_t *cfg );
 
err_t dht22_start_signal ( dht22_t *ctx );
 
err_t dht22_check_sensor_response ( dht22_t *ctx );
 
err_t dht22_get_sensor_data ( dht22_t *ctx, uint16_t *hum_data, uint16_t *temp_data );
 
err_t dht22_get_measurement_data ( dht22_t *ctx, float *humidity, float *temperature );
 
err_t dht22_init_sda_input ( dht22_t *ctx );
 
err_t dht22_init_sda_output ( dht22_t *ctx );
 
#ifdef __cplusplus
}
#endif
#endif  // DHT22_H
 
 // dht22
 
// ------------------------------------------------------------------------ END