CONTENTS OF THIS FILE
* Introduction
* Version
* Integration details
* Driver files information
* Supported sensor interface
* Simple Integration Example
INTRODUCTION
- This package contains the Bosch Sensortec MEMS BME680 sensor driver (sensor API)
- The sensor driver package includes below files
* bme680.c
* bme680.h
* bme680_calculations.c
* bme680_calculations.h
* bme680_internal.h
* sensor_api_common_types.h
* BME680_SensorAPI_Optimization_Example_Guide_External.pdf
VERSION
- Version of bme680 sensor driver is:
* bme680.c - 2.0.0
* bme680.h - 2.0.1
* bme680_calculations.c - 2.0.0
* bme680_calculations.h - 2.0.0
* bme680_internal.h - 2.0.0
* sensor_api_common_types.h - 2.0.1
* BME680_SensorAPI_Example_Guide.pdf - 2.0.0
INTEGRATION DETAILS
- Integrate files bme680.c, bme680.h, bme680_calculations.c, bme680_calculations.h, bme680_internal.h,
and sensor_api_common_types.h into your project.
- User has to refer bme680.h to refer the API calls for the integration.
- The BME680_SensorAPI_Example_Guide.pdf contains examples for API use cases.
DRIVER FILES INFORMATION
bme680.h
---------
* This header file has the constant definitions, user data types and supported sensor driver calls declarations which is required by the user.
bme680.c
---------
* This file contains the implementation for the sensor driver APIs.
bme680_calculations.h
----------------------
* This header file has the internal function declaration for the sensor calculation.
bme680_calculations.c
----------------------
* This file contains the implementation of the sensor calculations for sensor driver APIs.
bme680_internal.h
------------------
* This header file has the register address definition, internal constant definitions.
sensor_api_common_types.h
--------------------------
* This header file has the data type definition for different compiler platform.
SUPPORTED SENSOR INTERFACE
- This BME680 sensor driver supports SPI and I2C interfaces
Simple Integration Example
- A simple example for BME680 is given below.
- Example meant for Single BME680 sensor in Force Mode with Temperature
Pressure, Humidity and Gas Enabled
- For further examples and details refer BME680_SensorAPI_Example_Guide.pdf
- Please refer bme680.h to refer the API calls for the integration.
/* include bme680 main header */
#include "bme680.h"
/*!
* BME680_MAX_NO_OF_SENSOR = 2; defined in bme680.h file
* In order to interface only one sensor over SPI, user must change the value of
* BME680_MAX_NO_OF_SENSOR = 1
* Test setup: It has been assumed that <20>BME680 sensor_0<5F> interfaced over SPI with
* Native chip select line
*/
/* BME680 sensor structure instance */
struct bme680_t bme680_sensor_no[BME680_MAX_NO_OF_SENSOR];
/* BME680 sensor<6F>s compensated data structure instance */
struct bme680_comp_field_data compensate_data_sensor[BME680_MAX_NO_OF_SENSOR][3];
/* BME680 sensor<6F>s uncompensated data structure instance */
struct bme680_uncomp_field_data uncompensated_data_of_sensor[BME680_MAX_NO_OF_SENSOR][3];
/* BME680 sensor<6F>s configuration structure instance */
struct bme680_sens_conf set_conf_sensor[BME680_MAX_NO_OF_SENSOR];
/* BME680 sensor<6F>s heater configuration structure instance */
struct bme680_heater_conf set_heatr_conf_sensor[BME680_MAX_NO_OF_SENSOR];
void main(void)
{
unsigned int i = BME680_INIT_VALUE;
enum bme680_return_type com_rslt = BME680_COMM_RES_ERROR;
/* Do BME680 sensor structure instance initialization*/
/* Sensor_0 interface over SPI with native chip select line */
/* USER defined SPI bus read function */
bme680_sensor_no[0].bme680_bus_read = BME680_SPI_bus_read_user;
/* USER defined SPI bus write function */
bme680_sensor_no[0].bme680_bus_write = BME680_SPI_bus_write_user;
/* USER defined SPI burst read function */
bme680_sensor_no[0].bme680_burst_read = BME680_SPI_bus_read_user;
/* USER defined delay function */
bme680_sensor_no[0].delay_msec = BME680_delay_msec_user;
/* Mention communication interface */
bme680_sensor_no[0].interface = BME680_SPI_INTERFACE;
/* get chip id and calibration parameter */
com_rslt = bme680_init(&bme680_sensor_no[0]);
/* Do Sensor initialization */
for (i=0;i<BME680_MAX_NO_OF_SENSOR;i++) {
/* Check Device-ID before next steps of sensor operations */
if (BME680_CHIP_ID == bme680_sensor_no[i].chip_id) {
/* Select sensor configuration parameters */
set_conf_sensor[i].heatr_ctrl = BME680_HEATR_CTRL_ENABLE;
set_conf_sensor[i].run_gas = BME680_RUN_GAS_ENABLE;
set_conf_sensor[i].nb_conv = 0x00;
set_conf_sensor[i].osrs_hum = BME680_OSRS_1X;
set_conf_sensor[i].osrs_pres = BME680_OSRS_1X;
set_conf_sensor[i].osrs_temp = BME680_OSRS_1X;
/* activate sensor configuration */
com_rslt += bme680_set_sensor_config(&set_conf_sensor[i],
&bme680_sensor_no[i]);
/* Select Heater configuration parameters */
set_heatr_conf_sensor[i].heater_temp[0] = 300;
set_heatr_conf_sensor[i].heatr_idacv[0] = 1;
set_heatr_conf_sensor[i].heatr_dur[0] = 137;
set_heatr_conf_sensor[i].profile_cnt = 1;
/* activate heater configuration */
com_rslt += bme680_set_gas_heater_config(&set_heatr_conf_sensor[i],
&bme680_sensor_no[i]);
/* Set power mode as forced mode */
com_rslt += bme680_set_power_mode(BME680_FORCED_MODE,&bme680_sensor_no[i]);
if (BME680_COMM_RES_OK == com_rslt) {
/*Get the uncompensated T+P+G+H data*/
bme680_get_uncomp_data(uncompensated_data_of_sensor[i], 1, BME680_ALL,
&bme680_sensor_no[i]);
/*Get the compensated T+P+G+H data*/
bme680_compensate_data(uncompensated_data_of_sensor[i],
compensate_data_sensor[i], 1,
BME680_ALL, &bme680_sensor_no[i]);
/* put sensor into sleep mode explicitly */
bme680_set_power_mode(BME680_SLEEP_MODE, &bme680_sensor_no[i]);
/* call user define delay function(duration millisecond) */
User_define_delay(100);
}
}
}
}
