/**
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 *
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 * incidental, or consequential damages, arising from any product use not covered by the parameters of
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 * Sensortec for all costs in connection with such claims.
 *
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 *
 * Special:
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 *
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 */

/*!
 * @file bsec_integration.h
 *
 * @brief
 * Contains BSEC integration API
 */

/*!
 * @addtogroup bsec_examples BSEC Examples
 * @brief BSEC usage examples
 * @{*/

#ifndef __BSEC_INTEGRATION_H__
#define __BSEC_INTEGRATION_H__

#ifdef __cplusplus
extern "C"
{
#endif

/**********************************************************************************************************************/
/* header files */
/**********************************************************************************************************************/


#include "bme68x.h"
/* BSEC header files are available in the inc/ folder of the release package */
#include "bsec_interface_multi.h"
#include "bsec_datatypes.h"

#define BSEC_CHECK_INPUT(x, shift)		(x & (1 << (shift-1)))
#define BSEC_TOTAL_HEAT_DUR             UINT16_C(140)

/* Note : 
          For the classification output from BSEC algorithm set OUTPUT_MODE to CLASSIFICATION (default).
          For the regression output from BSEC algorithm set OUTPUT_MODE to REGRESSION.
          For the LP, ULP, CONT output from BSEC algorithm set OUTPUT_MODE to IAQ
*/
#define CLASSIFICATION	1
#define REGRESSION		2
#define IAQ				3
#define OUTPUT_MODE		CLASSIFICATION

/* Note : 
          Set the appropriate "SAMPLE_RATE" based on configured "OUTPUT_MODE".
			* If the "OUTPUT_MODE"  value is "CLASSIFICATION" (or) "REGRESSION", the "SAMPLE_RATE" assigned is "BSEC_SAMPLE_RATE_SCAN" (default).
			* If the "OUTPUT_MODE" value is "IAQ", the "SAMPLE_RATE" assigned is "BSEC_SAMPLE_RATE_ULP" (default).
			* For the "OUTPUT_MODE" as "IAQ" the other supported "SAMPLE_RATE" is "BSEC_SAMPLE_RATE_CONT" (or) "BSEC_SAMPLE_RATE_LP".
*/
#if (OUTPUT_MODE == CLASSIFICATION || OUTPUT_MODE == REGRESSION)
#define SAMPLE_RATE		BSEC_SAMPLE_RATE_SCAN
#elif (OUTPUT_MODE == IAQ)
#define SAMPLE_RATE		BSEC_SAMPLE_RATE_ULP
#endif

#define BSEC_INSTANCE_SIZE  3272
#define NUM_OF_SENS    	    UINT8_C(8)
uint8_t					bsec_mem_block[NUM_OF_SENS][BSEC_INSTANCE_SIZE];
uint8_t *bsecInstance[NUM_OF_SENS];

/**********************************************************************************************************************/
/* type definitions */
/**********************************************************************************************************************/

/* Structure to store the BSEC output values */
typedef struct
{
	int64_t timestamp;
	float gas_estimate_1;
	float gas_estimate_2;
	float gas_estimate_3;
	float gas_estimate_4;
	float raw_pressure;
	float raw_temp;
	float raw_humidity;
	float raw_gas;
	uint8_t raw_gas_index;
	uint8_t gas_accuracy_1;
	uint8_t gas_accuracy_2;
	uint8_t gas_accuracy_3;
	uint8_t gas_accuracy_4;
	uint8_t sens_no;
	float iaq;
	uint8_t iaq_accuracy;
	float temperature;
	float humidity;
	float static_iaq;
	float stabStatus;
	float runInStatus;
	float co2_equivalent;
	float breath_voc_equivalent;
	float gas_percentage;
}output_t;

/* function pointer to the system specific sleep function */
typedef void (*sleep_fct)(uint32_t t_us,void *intf_ptr);

/* function pointer to the system specific timestamp derivation function */
typedef int64_t (*get_timestamp_us_fct)();

/* function pointer to the function processing obtained BSEC outputs */
typedef void (*output_ready_fct)(output_t *output, bsec_library_return_t bsec_status);


/* function pointer to the function loading a previous BSEC state from NVM */
typedef uint32_t (*state_load_fct)(uint8_t *state_buffer, uint32_t n_buffer);

/* function pointer to the function saving BSEC state to NVM */
typedef void (*state_save_fct)(const uint8_t *state_buffer, uint32_t length);

/* function pointer to the function loading the BSEC configuration string from NVM */
typedef uint32_t (*config_load_fct)(uint8_t *state_buffer, uint32_t n_buffer);
    
/* structure definitions */

/* Structure with the return value from bsec_iot_init() */
typedef struct{
	/*! Result of API execution status */
	int8_t bme68x_status;
	/*! Result of BSEC library */
	bsec_library_return_t bsec_status;
}return_values_init;
/**********************************************************************************************************************/
/* function declarations */
/**********************************************************************************************************************/

/*!
 * @brief       Initialize the bme68x sensor and the BSEC library
 *
 * @param[in]   sample_rate         mode to be used (either BSEC_SAMPLE_RATE_ULP or BSEC_SAMPLE_RATE_LP)
 * @param[in]   temperature_offset  device-specific temperature offset (due to self-heating)
 * @param[in]   bus_write           pointer to the bus writing function
 * @param[in]   bus_read            pointer to the bus reading function
 * @param[in]   sleep               pointer to the system-specific sleep function
 * @param[in]   state_load          pointer to the system-specific state load function
 * @param[in]   sens_no             sensor no
 *
 * @return      zero if successful, negative otherwise
 */
return_values_init bsec_iot_init(float sample_rate, float temperature_offset, bme68x_write_fptr_t bus_write, bme68x_read_fptr_t bus_read, 
    sleep_fct sleep_n, state_load_fct state_load, config_load_fct config_load, struct bme68x_dev dev, uint8_t sens_no);

/*!
 * @brief       Runs the main (endless) loop that queries sensor settings, applies them, and processes the measured data
 *
 * @param[in]   sleep               pointer to the system-specific sleep function
 * @param[in]   get_timestamp_us    pointer to the system-specific timestamp derivation function
 * @param[in]   output_ready        pointer to the function processing obtained BSEC outputs
 * @param[in]   state_save          pointer to the system-specific state save function
 * @param[in]   save_intvl          interval at which BSEC state should be saved (in samples)
 *
 * @return      return_values_init	struct with the result of the API and the BSEC library
 */ 
void bsec_iot_loop(sleep_fct sleep_n, get_timestamp_us_fct get_timestamp_us, output_ready_fct output_ready,
    state_save_fct state_save, uint32_t save_intvl);

/**
 * @brief Function to assign the memory block to the bsec instance
 *
 * @param[in] memBlock : reference to the memory block
 * @param[in] sens_no  : sensor no
 */
void allocateMemory(uint8_t *memBlock, uint8_t sens_no);

#ifdef __cplusplus
}
#endif

#endif /* __BSEC_INTEGRATION_H__ */

/*! @}*/