565 lines
27 KiB
C
565 lines
27 KiB
C
/*
|
|
* Copyright (C) 2015, 2016, 2017 Robert Bosch. All Rights Reserved.
|
|
*
|
|
* Disclaimer
|
|
*
|
|
* Common:
|
|
* Bosch Sensortec products are developed for the consumer goods industry. They may only be used
|
|
* within the parameters of the respective valid product data sheet. Bosch Sensortec products are
|
|
* provided with the express understanding that there is no warranty of fitness for a particular purpose.
|
|
* They are not fit for use in life-sustaining, safety or security sensitive systems or any system or device
|
|
* that may lead to bodily harm or property damage if the system or device malfunctions. In addition,
|
|
* Bosch Sensortec products are not fit for use in products which interact with motor vehicle systems.
|
|
* The resale and/or use of products are at the purchasers own risk and his own responsibility. The
|
|
* examination of fitness for the intended use is the sole responsibility of the Purchaser.
|
|
*
|
|
* The purchaser shall indemnify Bosch Sensortec from all third party claims, including any claims for
|
|
* incidental, or consequential damages, arising from any product use not covered by the parameters of
|
|
* the respective valid product data sheet or not approved by Bosch Sensortec and reimburse Bosch
|
|
* Sensortec for all costs in connection with such claims.
|
|
*
|
|
* The purchaser must monitor the market for the purchased products, particularly with regard to
|
|
* product safety and inform Bosch Sensortec without delay of all security relevant incidents.
|
|
*
|
|
* Engineering Samples are marked with an asterisk (*) or (e). Samples may vary from the valid
|
|
* technical specifications of the product series. They are therefore not intended or fit for resale to third
|
|
* parties or for use in end products. Their sole purpose is internal client testing. The testing of an
|
|
* engineering sample may in no way replace the testing of a product series. Bosch Sensortec
|
|
* assumes no liability for the use of engineering samples. By accepting the engineering samples, the
|
|
* Purchaser agrees to indemnify Bosch Sensortec from all claims arising from the use of engineering
|
|
* samples.
|
|
*
|
|
* Special:
|
|
* This software module (hereinafter called "Software") and any information on application-sheets
|
|
* (hereinafter called "Information") is provided free of charge for the sole purpose to support your
|
|
* application work. The Software and Information is subject to the following terms and conditions:
|
|
*
|
|
* The Software is specifically designed for the exclusive use for Bosch Sensortec products by
|
|
* personnel who have special experience and training. Do not use this Software if you do not have the
|
|
* proper experience or training.
|
|
*
|
|
* This Software package is provided `` as is `` and without any expressed or implied warranties,
|
|
* including without limitation, the implied warranties of merchantability and fitness for a particular
|
|
* purpose.
|
|
*
|
|
* Bosch Sensortec and their representatives and agents deny any liability for the functional impairment
|
|
* of this Software in terms of fitness, performance and safety. Bosch Sensortec and their
|
|
* representatives and agents shall not be liable for any direct or indirect damages or injury, except as
|
|
* otherwise stipulated in mandatory applicable law.
|
|
*
|
|
* The Information provided is believed to be accurate and reliable. Bosch Sensortec assumes no
|
|
* responsibility for the consequences of use of such Information nor for any infringement of patents or
|
|
* other rights of third parties which may result from its use. No license is granted by implication or
|
|
* otherwise under any patent or patent rights of Bosch. Specifications mentioned in the Information are
|
|
* subject to change without notice.
|
|
*
|
|
* It is not allowed to deliver the source code of the Software to any third party without permission of
|
|
* Bosch Sensortec.
|
|
*
|
|
*/
|
|
/*!
|
|
*
|
|
* @file bsec_interface.h
|
|
*
|
|
* @brief
|
|
* Contains the API for BSEC
|
|
*
|
|
*/
|
|
|
|
|
|
#ifndef __BSEC_INTERFACE_H__
|
|
#define __BSEC_INTERFACE_H__
|
|
|
|
#include "bsec_datatypes.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
|
|
/*! @addtogroup bsec_interface BSEC C Interface
|
|
* @brief Interfaces of BSEC signal processing library
|
|
*
|
|
* ### Interface usage
|
|
*
|
|
* The following provides a short overview on the typical operation sequence for BSEC.
|
|
*
|
|
* - Initialization of the library
|
|
*
|
|
* | Steps | Function |
|
|
* |---------------------------------------------------------------------|--------------------------|
|
|
* | Initialization of library | bsec_init() |
|
|
* | Update configuration settings (optional) | bsec_set_configuration() |
|
|
* | Restore the state of the library (optional) | bsec_set_state() |
|
|
*
|
|
*
|
|
* - The following function is called to enable output signals and define their sampling rate / operation mode.
|
|
*
|
|
* | Steps | Function |
|
|
* |---------------------------------------------|----------------------------|
|
|
* | Enable library outputs with specified mode | bsec_update_subscription() |
|
|
*
|
|
*
|
|
* - This table describes the main processing loop.
|
|
*
|
|
* | Steps | Function |
|
|
* |-------------------------------------------|----------------------------------|
|
|
* | Retrieve sensor settings to be used | bsec_sensor_control() |
|
|
* | Configure sensor and trigger measurement | See BME680 API and example codes |
|
|
* | Read results from sensor | See BME680 API and example codes |
|
|
* | Perform signal processing | bsec_do_steps() |
|
|
*
|
|
*
|
|
* - Before shutting down the system, the current state of BSEC can be retrieved and can then be used during
|
|
* re-initialization to continue processing.
|
|
*
|
|
* | Steps | Function |
|
|
* |----------------------------------------|-------------------|
|
|
* | To retrieve the current library state | bsec_get_state() |
|
|
*
|
|
*
|
|
*
|
|
* ### Configuration and state
|
|
*
|
|
* Values of variables belonging to a BSEC instance are divided into two groups:
|
|
* - Values **not updated by processing** of signals belong to the **configuration group**. If available, BSEC can be
|
|
* configured before use with a customer specific configuration string.
|
|
* - Values **updated during processing** are member of the **state group**. Saving and restoring of the state of BSEC
|
|
* is necessary to maintain previously estimated sensor models and baseline information which is important for best
|
|
* performance of the gas sensor outputs.
|
|
*
|
|
* @note BSEC library consists of adaptive algorithms which models the gas sensor which improves its performance over
|
|
* the time. These will be lost if library is initialized due to system reset. In order to avoid this situation
|
|
* library state shall be stored in non volatile memory so that it can be loaded after system reset.
|
|
*
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
|
|
/*!
|
|
* @brief Return the version information of BSEC library
|
|
*
|
|
* @param [out] bsec_version_p pointer to struct which is to be populated with the version information
|
|
*
|
|
* @return Zero if successful, otherwise an error code
|
|
*
|
|
* See also: bsec_version_t
|
|
*
|
|
\code{.c}
|
|
// Example //
|
|
bsec_version_t version;
|
|
bsec_get_version(&version);
|
|
printf("BSEC version: %d.%d.%d.%d",version.major, version.minor, version.major_bugfix, version.minor_bugfix);
|
|
|
|
\endcode
|
|
*/
|
|
|
|
bsec_library_return_t bsec_get_version(bsec_version_t * bsec_version_p);
|
|
|
|
|
|
/*!
|
|
* @brief Initialize the library
|
|
*
|
|
* Initialization and reset of BSEC is performed by calling bsec_init(). Calling this function sets up the relation
|
|
* among all internal modules, initializes run-time dependent library states and resets the configuration and state
|
|
* of all BSEC signal processing modules to defaults.
|
|
*
|
|
* Before any further use, the library must be initialized. This ensure that all memory and states are in defined
|
|
* conditions prior to processing any data.
|
|
*
|
|
* @return Zero if successful, otherwise an error code
|
|
*
|
|
\code{.c}
|
|
|
|
// Initialize BSEC library before further use
|
|
bsec_init();
|
|
|
|
\endcode
|
|
*/
|
|
|
|
bsec_library_return_t bsec_init(void);
|
|
|
|
/*!
|
|
* @brief Subscribe to library virtual sensors outputs
|
|
*
|
|
* Use bsec_update_subscription() to instruct BSEC which of the processed output signals are requested at which sample rates.
|
|
* See ::bsec_virtual_sensor_t for available library outputs.
|
|
*
|
|
* Based on the requested virtual sensors outputs, BSEC will provide information about the required physical sensor input signals
|
|
* (see ::bsec_physical_sensor_t) with corresponding sample rates. This information is purely informational as bsec_sensor_control()
|
|
* will ensure the sensor is operated in the required manner. To disable a virtual sensor, set the sample rate to BSEC_SAMPLE_RATE_DISABLED.
|
|
*
|
|
* The subscription update using bsec_update_subscription() is apart from the signal processing one of the the most
|
|
* important functions. It allows to enable the desired library outputs. The function determines which physical input
|
|
* sensor signals are required at which sample rate to produce the virtual output sensor signals requested by the user.
|
|
* When this function returns with success, the requested outputs are called subscribed. A very important feature is the
|
|
* retaining of already subscribed outputs. Further outputs can be requested or disabled both individually and
|
|
* group-wise in addition to already subscribed outputs without changing them unless a change of already subscribed
|
|
* outputs is requested.
|
|
*
|
|
* @note The state of the library concerning the subscribed outputs cannot be retained among reboots.
|
|
*
|
|
* The interface of bsec_update_subscription() requires the usage of arrays of sensor configuration structures.
|
|
* Such a structure has the fields sensor identifier and sample rate. These fields have the properties:
|
|
* - Output signals of virtual sensors must be requested using unique identifiers (Member of ::bsec_virtual_sensor_t)
|
|
* - Different sets of identifiers are available for inputs of physical sensors and outputs of virtual sensors
|
|
* - Identifiers are unique values defined by the library, not from external
|
|
* - Sample rates must be provided as value of
|
|
* - An allowed sample rate for continuously sampled signals
|
|
* - 65535.0f (BSEC_SAMPLE_RATE_DISABLED) to turn off outputs and identify disabled inputs
|
|
*
|
|
* @note The same sensor identifiers are also used within the functions bsec_do_steps().
|
|
*
|
|
* The usage principles of bsec_update_subscription() are:
|
|
* - Differential updates (i.e., only asking for outputs that the user would like to change) is supported.
|
|
* - Invalid requests of outputs are ignored. Also if one of the requested outputs is unavailable, all the requests
|
|
* are ignored. At the same time, a warning is returned.
|
|
* - To disable BSEC, all outputs shall be turned off. Only enabled (subscribed) outputs have to be disabled while
|
|
* already disabled outputs do not have to be disabled explicitly.
|
|
*
|
|
* @param[in] requested_virtual_sensors Pointer to array of requested virtual sensor (output) configurations for the library
|
|
* @param[in] n_requested_virtual_sensors Number of virtual sensor structs pointed by requested_virtual_sensors
|
|
* @param[out] required_sensor_settings Pointer to array of required physical sensor configurations for the library
|
|
* @param[in,out] n_required_sensor_settings [in] Size of allocated required_sensor_settings array, [out] number of sensor configurations returned
|
|
*
|
|
* @return Zero when successful, otherwise an error code
|
|
*
|
|
* @sa bsec_sensor_configuration_t
|
|
* @sa bsec_physical_sensor_t
|
|
* @sa bsec_virtual_sensor_t
|
|
*
|
|
\code{.c}
|
|
// Example //
|
|
|
|
// Change 3 virtual sensors (switch IAQ and raw temperature -> on / pressure -> off)
|
|
bsec_sensor_configuration_t requested_virtual_sensors[3];
|
|
uint8_t n_requested_virtual_sensors = 3;
|
|
|
|
requested_virtual_sensors[0].sensor_id = BSEC_OUTPUT_IAQ;
|
|
requested_virtual_sensors[0].sample_rate = BSEC_SAMPLE_RATE_ULP;
|
|
requested_virtual_sensors[1].sensor_id = BSEC_OUTPUT_RAW_TEMPERATURE;
|
|
requested_virtual_sensors[1].sample_rate = BSEC_SAMPLE_RATE_ULP;
|
|
requested_virtual_sensors[2].sensor_id = BSEC_OUTPUT_RAW_PRESSURE;
|
|
requested_virtual_sensors[2].sample_rate = BSEC_SAMPLE_RATE_DISABLED;
|
|
|
|
// Allocate a struct for the returned physical sensor settings
|
|
bsec_sensor_configuration_t required_sensor_settings[BSEC_MAX_PHYSICAL_SENSOR];
|
|
uint8_t n_required_sensor_settings = BSEC_MAX_PHYSICAL_SENSOR;
|
|
|
|
// Call bsec_update_subscription() to enable/disable the requested virtual sensors
|
|
bsec_update_subscription(requested_virtual_sensors, n_requested_virtual_sensors, required_sensor_settings, &n_required_sensor_settings);
|
|
\endcode
|
|
*
|
|
*/
|
|
bsec_library_return_t bsec_update_subscription(const bsec_sensor_configuration_t * const requested_virtual_sensors,
|
|
const uint8_t n_requested_virtual_sensors, bsec_sensor_configuration_t * required_sensor_settings,
|
|
uint8_t * n_required_sensor_settings);
|
|
|
|
|
|
/*!
|
|
* @brief Main signal processing function of BSEC
|
|
*
|
|
*
|
|
* Processing of the input signals and returning of output samples is performed by bsec_do_steps().
|
|
* - The samples of all library inputs must be passed with unique identifiers representing the input signals from
|
|
* physical sensors where the order of these inputs can be chosen arbitrary. However, all input have to be provided
|
|
* within the same time period as they are read. A sequential provision to the library might result in undefined
|
|
* behavior.
|
|
* - The samples of all library outputs are returned with unique identifiers corresponding to the output signals of
|
|
* virtual sensors where the order of the returned outputs may be arbitrary.
|
|
* - The samples of all input as well as output signals of physical as well as virtual sensors use the same
|
|
* representation in memory with the following fields:
|
|
* - Sensor identifier:
|
|
* - For inputs: required to identify the input signal from a physical sensor
|
|
* - For output: overwritten by bsec_do_steps() to identify the returned signal from a virtual sensor
|
|
* - Time stamp of the sample
|
|
*
|
|
* Calling bsec_do_steps() requires the samples of the input signals to be provided along with their time stamp when
|
|
* they are recorded and only when they are acquired. Repetition of samples with the same time stamp are ignored and
|
|
* result in a warning. Repetition of values of samples which are not acquired anew by a sensor result in deviations
|
|
* of the computed output signals. Concerning the returned output samples, an important feature is, that a value is
|
|
* returned for an output only when a new occurrence has been computed. A sample of an output signal is returned only
|
|
* once.
|
|
*
|
|
*
|
|
* @param[in] inputs Array of input data samples. Each array element represents a sample of a different physical sensor.
|
|
* @param[in] n_inputs Number of passed input data structs.
|
|
* @param[out] outputs Array of output data samples. Each array element represents a sample of a different virtual sensor.
|
|
* @param[in,out] n_outputs [in] Number of allocated output structs, [out] number of outputs returned
|
|
*
|
|
* @return Zero when successful, otherwise an error code
|
|
*
|
|
|
|
\code{.c}
|
|
// Example //
|
|
|
|
// Allocate input and output memory
|
|
bsec_input_t input[3];
|
|
uint8_t n_input = 3;
|
|
bsec_output_t output[2];
|
|
uint8_t n_output=2;
|
|
|
|
bsec_library_return_t status;
|
|
|
|
// Populate the input structs, assuming the we have timestamp (ts),
|
|
// gas sensor resistance (R), temperature (T), and humidity (rH) available
|
|
// as input variables
|
|
input[0].sensor_id = BSEC_INPUT_GASRESISTOR;
|
|
input[0].signal = R;
|
|
input[0].time_stamp= ts;
|
|
input[1].sensor_id = BSEC_INPUT_TEMPERATURE;
|
|
input[1].signal = T;
|
|
input[1].time_stamp= ts;
|
|
input[2].sensor_id = BSEC_INPUT_HUMIDITY;
|
|
input[2].signal = rH;
|
|
input[2].time_stamp= ts;
|
|
|
|
|
|
// Invoke main processing BSEC function
|
|
status = bsec_do_steps( input, n_input, output, &n_output );
|
|
|
|
// Iterate through the BSEC output data, if the call succeeded
|
|
if(status == BSEC_OK)
|
|
{
|
|
for(int i = 0; i < n_output; i++)
|
|
{
|
|
switch(output[i].sensor_id)
|
|
{
|
|
case BSEC_OUTPUT_IAQ:
|
|
// Retrieve the IAQ results from output[i].signal
|
|
// and do something with the data
|
|
break;
|
|
case BSEC_OUTPUT_AMBIENT_TEMPERATURE:
|
|
// Retrieve the ambient temperature results from output[i].signal
|
|
// and do something with the data
|
|
break;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
\endcode
|
|
*/
|
|
|
|
bsec_library_return_t bsec_do_steps(const bsec_input_t * const inputs, const uint8_t n_inputs, bsec_output_t * outputs, uint8_t * n_outputs);
|
|
|
|
|
|
/*!
|
|
* @brief Reset a particular virtual sensor output
|
|
*
|
|
* This function allows specific virtual sensor outputs to be reset. The meaning of "reset" depends on the specific
|
|
* output. In case of the IAQ output, reset means zeroing the output to the current ambient conditions.
|
|
*
|
|
* @param[in] sensor_id Virtual sensor to be reset
|
|
*
|
|
* @return Zero when successful, otherwise an error code
|
|
*
|
|
*
|
|
\code{.c}
|
|
// Example //
|
|
bsec_reset_output(BSEC_OUTPUT_IAQ);
|
|
|
|
\endcode
|
|
*/
|
|
|
|
bsec_library_return_t bsec_reset_output(uint8_t sensor_id);
|
|
|
|
|
|
/*!
|
|
* @brief Update algorithm configuration parameters
|
|
*
|
|
* BSEC uses a default configuration for the modules and common settings. The initial configuration can be customized
|
|
* by bsec_set_configuration(). This is an optional step.
|
|
*
|
|
* @note A work buffer with sufficient size is required and has to be provided by the function caller to decompose
|
|
* the serialization and apply it to the library and its modules. Please use #BSEC_MAX_PROPERTY_BLOB_SIZE for allotting
|
|
* the required size.
|
|
*
|
|
* @param[in] serialized_settings Settings serialized to a binary blob
|
|
* @param[in] n_serialized_settings Size of the settings blob
|
|
* @param[in,out] work_buffer Work buffer used to parse the blob
|
|
* @param[in] n_work_buffer_size Length of the work buffer available for parsing the blob
|
|
*
|
|
* @return Zero when successful, otherwise an error code
|
|
*
|
|
\code{.c}
|
|
// Example //
|
|
|
|
// Allocate variables
|
|
uint8_t serialized_settings[BSEC_MAX_PROPERTY_BLOB_SIZE];
|
|
uint32_t n_serialized_settings_max = BSEC_MAX_PROPERTY_BLOB_SIZE;
|
|
uint8_t work_buffer[BSEC_MAX_PROPERTY_BLOB_SIZE];
|
|
uint32_t n_work_buffer = BSEC_MAX_PROPERTY_BLOB_SIZE;
|
|
|
|
// Here we will load a provided config string into serialized_settings
|
|
|
|
// Apply the configuration
|
|
bsec_set_configuration(serialized_settings, n_serialized_settings_max, work_buffer, n_work_buffer);
|
|
|
|
\endcode
|
|
*/
|
|
|
|
bsec_library_return_t bsec_set_configuration(const uint8_t * const serialized_settings,
|
|
const uint32_t n_serialized_settings, uint8_t * work_buffer,
|
|
const uint32_t n_work_buffer_size);
|
|
|
|
|
|
/*!
|
|
* @brief Restore the internal state of the library
|
|
*
|
|
* BSEC uses a default state for all signal processing modules and the BSEC module. To ensure optimal performance,
|
|
* especially of the gas sensor functionality, it is recommended to retrieve the state using bsec_get_state()
|
|
* before unloading the library, storing it in some form of non-volatile memory, and setting it using bsec_set_state()
|
|
* before resuming further operation of the library.
|
|
*
|
|
* @note A work buffer with sufficient size is required and has to be provided by the function caller to decompose the
|
|
* serialization and apply it to the library and its modules. Please use #BSEC_MAX_PROPERTY_BLOB_SIZE for allotting the
|
|
* required size.
|
|
*
|
|
* @param[in] serialized_state States serialized to a binary blob
|
|
* @param[in] n_serialized_state Size of the state blob
|
|
* @param[in,out] work_buffer Work buffer used to parse the blob
|
|
* @param[in] n_work_buffer_size Length of the work buffer available for parsing the blob
|
|
*
|
|
* @return Zero when successful, otherwise an error code
|
|
*
|
|
\code{.c}
|
|
// Example //
|
|
|
|
// Allocate variables
|
|
uint8_t serialized_state[BSEC_MAX_PROPERTY_BLOB_SIZE];
|
|
uint32_t n_serialized_state = BSEC_MAX_PROPERTY_BLOB_SIZE;
|
|
uint8_t work_buffer_state[BSEC_MAX_PROPERTY_BLOB_SIZE];
|
|
uint32_t n_work_buffer_size = BSEC_MAX_PROPERTY_BLOB_SIZE;
|
|
|
|
// Here we will load a state string from a previous use of BSEC
|
|
|
|
// Apply the previous state to the current BSEC session
|
|
bsec_set_state(serialized_state, n_serialized_state, work_buffer_state, n_work_buffer_size);
|
|
|
|
\endcode
|
|
*/
|
|
|
|
bsec_library_return_t bsec_set_state(const uint8_t * const serialized_state, const uint32_t n_serialized_state,
|
|
uint8_t * work_buffer, const uint32_t n_work_buffer_size);
|
|
|
|
|
|
/*!
|
|
* @brief Retrieve the current library configuration
|
|
*
|
|
* BSEC allows to retrieve the current configuration using bsec_get_configuration(). Returns a binary blob encoding
|
|
* the current configuration parameters of the library in a format compatible with bsec_set_configuration().
|
|
*
|
|
* @note The function bsec_get_configuration() is required to be used for debugging purposes only.
|
|
* @note A work buffer with sufficient size is required and has to be provided by the function caller to decompose the
|
|
* serialization and apply it to the library and its modules. Please use #BSEC_MAX_PROPERTY_BLOB_SIZE for allotting the
|
|
* required size.
|
|
*
|
|
*
|
|
* @param[in] config_id Identifier for a specific set of configuration settings to be returned;
|
|
* shall be zero to retrieve all configuration settings.
|
|
* @param[out] serialized_settings Buffer to hold the serialized config blob
|
|
* @param[in] n_serialized_settings_max Maximum available size for the serialized settings
|
|
* @param[in,out] work_buffer Work buffer used to parse the binary blob
|
|
* @param[in] n_work_buffer Length of the work buffer available for parsing the blob
|
|
* @param[out] n_serialized_settings Actual size of the returned serialized configuration blob
|
|
*
|
|
* @return Zero when successful, otherwise an error code
|
|
*
|
|
\code{.c}
|
|
// Example //
|
|
|
|
// Allocate variables
|
|
uint8_t serialized_settings[BSEC_MAX_PROPERTY_BLOB_SIZE];
|
|
uint32_t n_serialized_settings_max = BSEC_MAX_PROPERTY_BLOB_SIZE;
|
|
uint8_t work_buffer[BSEC_MAX_PROPERTY_BLOB_SIZE];
|
|
uint32_t n_work_buffer = BSEC_MAX_PROPERTY_BLOB_SIZE;
|
|
uint32_t n_serialized_settings = 0;
|
|
|
|
// Configuration of BSEC algorithm is stored in 'serialized_settings'
|
|
bsec_get_configuration(0, serialized_settings, n_serialized_settings_max, work_buffer, n_work_buffer, &n_serialized_settings);
|
|
|
|
\endcode
|
|
*/
|
|
|
|
bsec_library_return_t bsec_get_configuration(const uint8_t config_id, uint8_t * serialized_settings, const uint32_t n_serialized_settings_max,
|
|
uint8_t * work_buffer, const uint32_t n_work_buffer, uint32_t * n_serialized_settings);
|
|
|
|
|
|
/*!
|
|
*@brief Retrieve the current internal library state
|
|
*
|
|
* BSEC allows to retrieve the current states of all signal processing modules and the BSEC module using
|
|
* bsec_get_state(). This allows a restart of the processing after a reboot of the system by calling bsec_set_state().
|
|
*
|
|
* @note A work buffer with sufficient size is required and has to be provided by the function caller to decompose the
|
|
* serialization and apply it to the library and its modules. Please use #BSEC_MAX_STATE_BLOB_SIZE for allotting the
|
|
* required size.
|
|
*
|
|
*
|
|
* @param[in] state_set_id Identifier for a specific set of states to be returned; shall be
|
|
* zero to retrieve all states.
|
|
* @param[out] serialized_state Buffer to hold the serialized config blob
|
|
* @param[in] n_serialized_state_max Maximum available size for the serialized states
|
|
* @param[in,out] work_buffer Work buffer used to parse the blob
|
|
* @param[in] n_work_buffer Length of the work buffer available for parsing the blob
|
|
* @param[out] n_serialized_state Actual size of the returned serialized blob
|
|
*
|
|
* @return Zero when successful, otherwise an error code
|
|
*
|
|
\code{.c}
|
|
// Example //
|
|
|
|
// Allocate variables
|
|
uint8_t serialized_state[BSEC_MAX_STATE_BLOB_SIZE];
|
|
uint32_t n_serialized_state_max = BSEC_MAX_STATE_BLOB_SIZE;
|
|
uint32_t n_serialized_state = BSEC_MAX_STATE_BLOB_SIZE;
|
|
uint8_t work_buffer_state[BSEC_MAX_STATE_BLOB_SIZE];
|
|
uint32_t n_work_buffer_size = BSEC_MAX_STATE_BLOB_SIZE;
|
|
|
|
// Algorithm state is stored in 'serialized_state'
|
|
bsec_get_state(0, serialized_state, n_serialized_state_max, work_buffer_state, n_work_buffer_size, &n_serialized_state);
|
|
|
|
\endcode
|
|
*/
|
|
|
|
bsec_library_return_t bsec_get_state(const uint8_t state_set_id, uint8_t * serialized_state,
|
|
const uint32_t n_serialized_state_max, uint8_t * work_buffer, const uint32_t n_work_buffer,
|
|
uint32_t * n_serialized_state);
|
|
|
|
/*!
|
|
* @brief Retrieve BMExxx sensor instructions
|
|
*
|
|
* The bsec_sensor_control() interface is a key feature of BSEC, as it allows an easy way for the signal processing
|
|
* library to control the operation of the BME sensor. This is important since gas sensor behaviour is mainly
|
|
* determined by how the integrated heater is configured. To ensure an easy integration of BSEC into any system,
|
|
* bsec_sensor_control() will provide the caller with information about the current sensor configuration that is
|
|
* necessary to fulfill the input requirements derived from the current outputs requested via
|
|
* bsec_update_subscription().
|
|
*
|
|
* In practice the use of this function shall be as follows:
|
|
* - Call bsec_sensor_control() which returns a bsec_bme_settings_t struct.
|
|
* - Based on the information contained in this struct, the sensor is configured and a forced-mode measurement is
|
|
* triggered if requested by bsec_sensor_control().
|
|
* - Once this forced-mode measurement is complete, the signals specified in this struct shall be passed to
|
|
* bsec_do_steps() to perform the signal processing.
|
|
* - After processing, the process should sleep until the bsec_bme_settings_t::next_call timestamp is reached.
|
|
*
|
|
*
|
|
* @param [in] time_stamp Current timestamp in [ns]
|
|
* @param[out] sensor_settings Settings to be passed to API to operate sensor at this time instance
|
|
*
|
|
* @return Zero when successful, otherwise an error code
|
|
*/
|
|
|
|
bsec_library_return_t bsec_sensor_control(const int64_t time_stamp, bsec_bme_settings_t *sensor_settings);
|
|
|
|
/*@}*/ //BSEC Interface
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __BSEC_INTERFACE_H__ */
|