dht222.h

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/*
 * MikroSDK - MikroE Software Development Kit
 * Copyright© 2020 MikroElektronika d.o.o.
 * 
 * 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 DHT222_H
#define DHT222_H
 
#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"
 
// -------------------------------------------------------------- PUBLIC MACROS 
#define DHT222_MAP_MIKROBUS( cfg, mikrobus ) \
  cfg.scl  = MIKROBUS( mikrobus, MIKROBUS_SCL ); \
  cfg.sda  = MIKROBUS( mikrobus, MIKROBUS_SDA );
#define DHT222_OK                               0
#define DHT222_ERROR                           -1
#define DHT222_I2C_ADDRESS_WRITE                0xB8
#define DHT222_I2C_ADDRESS_READ                 0xB9
#define DHT222_REG_HUMIDITY_MSB                 0x00
#define DHT222_REG_HUMIDITY_LSB                 0x01
#define DHT222_REG_TEMPERATURE_MSB              0x02
#define DHT222_REG_TEMPERATURE_LSB              0x03
#define DHT222_REG_MODEL_MSB                    0x08
#define DHT222_REG_MODEL_LSB                    0x09
#define DHT222_REG_VERSION                      0x0A
#define DHT222_REG_DEVICE_ID_3                  0x0B
#define DHT222_REG_DEVICE_ID_2                  0x0C
#define DHT222_REG_DEVICE_ID_1                  0x0D
#define DHT222_REG_DEVICE_ID_0                  0x0E
#define DHT222_REG_STATE                        0x0F
#define DHT222_REG_USER_REG_1_MSB               0x10
#define DHT222_REG_USER_REG_1_LSB               0x11
#define DHT222_REG_USER_REG_2_MSB               0x12
#define DHT222_REG_USER_REG_2_LSB               0x13
#define DHT222_CMD_READ                         0x03
#define DHT222_CMD_WRITE                        0x10
#define DHT222_TIMEOUT                          100000ul
 // End group macro 
// --------------------------------------------------------------- PUBLIC TYPES
typedef struct
{
    pin_name_t scl;
    pin_name_t sda;
    
    uint8_t i2c_started;
    
} dht222_t;
 
typedef struct
{
    pin_name_t scl;
    pin_name_t sda;
 
} dht222_cfg_t;
 
 // End types group
// ----------------------------------------------- PUBLIC FUNCTION DECLARATIONS
 
#ifdef __cplusplus
extern "C"{
#endif
 
void dht222_cfg_setup ( dht222_cfg_t *cfg );
 
err_t dht222_init ( dht222_t *ctx, dht222_cfg_t *cfg );
 
err_t dht222_read_reg ( dht222_t *ctx, uint8_t address, uint8_t *data_out, uint8_t len );
 
err_t dht222_write_reg ( dht222_t *ctx, uint8_t address, uint8_t *data_in, uint8_t len );
 
err_t dht222_get_temperature ( dht222_t *ctx, uint16_t *temperature );
 
err_t dht222_get_humidity ( dht222_t *ctx, uint16_t *humidity );
 
err_t dht222_get_temp_hum ( dht222_t *ctx, uint16_t *temperature, uint16_t *humidity );
 
#ifdef __cplusplus
}
#endif
#endif  // _DHT222_H_
 
 // End public_function group
 
// ------------------------------------------------------------------------- END