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# BME680 sensor API
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## Introduction
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This package contains the Bosch Sensortec's BME680 gas sensor API
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The sensor driver package includes bme680.h, bme680.c and bme680_defs.h files
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## Version
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File | Version | Date
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--------------|---------|-------------
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bme680.c | 3.5.9 | 19 Jun 2018
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bme680.h | 3.5.9 | 19 Jun 2018
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bme680_defs.h | 3.5.9 | 19 Jun 2018
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## Integration details
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* Integrate bme680.h, bme680_defs.h and bme680.c file in to your project.
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* Include the bme680.h file in your code like below.
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``` c
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#include "bme680.h"
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```
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## File information
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* bme680_defs.h : This header file has the constants, macros and datatype declarations.
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* bme680.h : This header file contains the declarations of the sensor driver APIs.
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* bme680.c : This source file contains the definitions of the sensor driver APIs.
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## Supported sensor interfaces
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* SPI 4-wire
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* I2C
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## Usage guide
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### Initializing the sensor
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To initialize the sensor, you will first need to create a device structure. You
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can do this by creating an instance of the structure bme680_dev. Then go on to
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fill in the various parameters as shown below
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#### Example for SPI 4-Wire
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``` c
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struct bme680_dev gas_sensor;
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/* You may assign a chip select identifier to be handled later */
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gas_sensor.dev_id = 0;
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gas_sensor.intf = BME680_SPI_INTF;
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gas_sensor.read = user_spi_read;
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gas_sensor.write = user_spi_write;
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gas_sensor.delay_ms = user_delay_ms;
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/* amb_temp can be set to 25 prior to configuring the gas sensor
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* or by performing a few temperature readings without operating the gas sensor.
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*/
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gas_sensor.amb_temp = 25;
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int8_t rslt = BME680_OK;
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rslt = bme680_init(&gas_sensor);
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```
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#### Example for I2C
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``` c
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struct bme680_dev gas_sensor;
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gas_sensor.dev_id = BME680_I2C_ADDR_PRIMARY;
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gas_sensor.intf = BME680_I2C_INTF;
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gas_sensor.read = i2c_read;
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gas_sensor.write = i2c_write;
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gas_sensor.delay_ms = user_delay_ms;
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/* amb_temp can be set to 25 prior to configuring the gas sensor
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* or by performing a few temperature readings without operating the gas sensor.
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*/
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gas_sensor.amb_temp = 25;
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int8_t rslt = BME680_OK;
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rslt = bme680_init(&gas_sensor);
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```
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Regarding compensation functions for temperature, pressure, humidity and gas we have two implementations.
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- Integer version
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- floating point version
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By default, Integer version is used in the API
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If the user needs the floating point version, the user has to un-comment BME680_FLOAT_POINT_COMPENSATION macro
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in bme680_defs.h file or to add it in the compiler flags.
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### Configuring the sensor
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#### Example for configuring the sensor in forced mode
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``` c
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uint8_t set_required_settings;
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/* Set the temperature, pressure and humidity settings */
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gas_sensor.tph_sett.os_hum = BME680_OS_2X;
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gas_sensor.tph_sett.os_pres = BME680_OS_4X;
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gas_sensor.tph_sett.os_temp = BME680_OS_8X;
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gas_sensor.tph_sett.filter = BME680_FILTER_SIZE_3;
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/* Set the remaining gas sensor settings and link the heating profile */
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gas_sensor.gas_sett.run_gas = BME680_ENABLE_GAS_MEAS;
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/* Create a ramp heat waveform in 3 steps */
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gas_sensor.gas_sett.heatr_temp = 320; /* degree Celsius */
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gas_sensor.gas_sett.heatr_dur = 150; /* milliseconds */
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/* Select the power mode */
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/* Must be set before writing the sensor configuration */
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gas_sensor.power_mode = BME680_FORCED_MODE;
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/* Set the required sensor settings needed */
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set_required_settings = BME680_OST_SEL | BME680_OSP_SEL | BME680_OSH_SEL | BME680_FILTER_SEL
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| BME680_GAS_SENSOR_SEL;
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/* Set the desired sensor configuration */
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rslt = bme680_set_sensor_settings(set_required_settings,&gas_sensor);
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/* Set the power mode */
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rslt = bme680_set_sensor_mode(&gas_sensor);
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```
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### Reading sensor data
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#### Example for reading all sensor data
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``` c
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/* Get the total measurement duration so as to sleep or wait till the
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* measurement is complete */
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uint16_t meas_period;
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bme680_get_profile_dur(&meas_period, &gas_sensor);
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struct bme680_field_data data;
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while(1)
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{
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user_delay_ms(meas_period); /* Delay till the measurement is ready */
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rslt = bme680_get_sensor_data(&data, &gas_sensor);
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printf("T: %.2f degC, P: %.2f hPa, H %.2f %%rH ", data.temperature / 100.0f,
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data.pressure / 100.0f, data.humidity / 1000.0f );
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/* Avoid using measurements from an unstable heating setup */
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if(data.status & BME680_GASM_VALID_MSK)
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printf(", G: %d ohms", data.gas_resistance);
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printf("\r\n");
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/* Trigger the next measurement if you would like to read data out continuously */
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if (gas_sensor.power_mode == BME680_FORCED_MODE) {
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rslt = bme680_set_sensor_mode(&gas_sensor);
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}
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}
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```
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### Templates for function pointers
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``` c
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void user_delay_ms(uint32_t period)
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{
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/*
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* Return control or wait,
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* for a period amount of milliseconds
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*/
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}
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int8_t user_spi_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
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{
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int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */
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/*
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* The parameter dev_id can be used as a variable to select which Chip Select pin has
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* to be set low to activate the relevant device on the SPI bus
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*/
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/*
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* Data on the bus should be like
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* |----------------+---------------------+-------------|
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* | MOSI | MISO | Chip Select |
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* |----------------+---------------------|-------------|
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* | (don't care) | (don't care) | HIGH |
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* | (reg_addr) | (don't care) | LOW |
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* | (don't care) | (reg_data[0]) | LOW |
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* | (....) | (....) | LOW |
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* | (don't care) | (reg_data[len - 1]) | LOW |
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* | (don't care) | (don't care) | HIGH |
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* |----------------+---------------------|-------------|
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*/
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return rslt;
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}
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int8_t user_spi_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
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{
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int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */
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/*
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* The parameter dev_id can be used as a variable to select which Chip Select pin has
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* to be set low to activate the relevant device on the SPI bus
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*/
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/*
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* Data on the bus should be like
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* |---------------------+--------------+-------------|
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* | MOSI | MISO | Chip Select |
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* |---------------------+--------------|-------------|
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* | (don't care) | (don't care) | HIGH |
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* | (reg_addr) | (don't care) | LOW |
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* | (reg_data[0]) | (don't care) | LOW |
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* | (....) | (....) | LOW |
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* | (reg_data[len - 1]) | (don't care) | LOW |
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* | (don't care) | (don't care) | HIGH |
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* |---------------------+--------------|-------------|
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*/
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return rslt;
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}
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int8_t i2c_read(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
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{
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int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */
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/*
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* The parameter dev_id can be used as a variable to store the I2C address of the device
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*/
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/*
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* Data on the bus should be like
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* |------------+---------------------|
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* | I2C action | Data |
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* |------------+---------------------|
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* | Start | - |
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* | Write | (reg_addr) |
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* | Stop | - |
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* | Start | - |
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* | Read | (reg_data[0]) |
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* | Read | (....) |
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* | Read | (reg_data[len - 1]) |
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* | Stop | - |
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* |------------+---------------------|
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*/
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return rslt;
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}
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int8_t i2c_write(uint8_t dev_id, uint8_t reg_addr, uint8_t *reg_data, uint16_t len)
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{
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int8_t rslt = 0; /* Return 0 for Success, non-zero for failure */
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/*
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* The parameter dev_id can be used as a variable to store the I2C address of the device
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*/
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/*
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* Data on the bus should be like
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* |------------+---------------------|
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* | I2C action | Data |
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* |------------+---------------------|
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* | Start | - |
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* | Write | (reg_addr) |
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* | Write | (reg_data[0]) |
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* | Write | (....) |
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* | Write | (reg_data[len - 1]) |
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* | Stop | - |
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* |------------+---------------------|
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*/
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return rslt;
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}
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```
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## Copyright (C) 2017 - 2018 Bosch Sensortec GmbH
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File diff suppressed because it is too large.
Load diff
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/**
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* Copyright (C) 2017 - 2018 Bosch Sensortec GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright
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||||
* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the copyright holder nor the names of the
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
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* OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES(INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
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*
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* The information provided is believed to be accurate and reliable.
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* The copyright holder assumes no responsibility
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* for the consequences of use
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* of such information nor for any infringement of patents or
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* other rights of third parties which may result from its use.
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* No license is granted by implication or otherwise under any patent or
|
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* patent rights of the copyright holder.
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*
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* @file bme680.h
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* @date 19 Jun 2018
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* @version 3.5.9
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* @brief
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*
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*/
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/*! @file bme680.h
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@brief Sensor driver for BME680 sensor */
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/*!
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* @defgroup BME680 SENSOR API
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* @{*/
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#ifndef BME680_H_
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#define BME680_H_
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/*! CPP guard */
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/* Header includes */
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#include "bme680_defs.h"
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/* function prototype declarations */
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/*!
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* @brief This API is the entry point.
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* It reads the chip-id and calibration data from the sensor.
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*
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* @param[in,out] dev : Structure instance of bme680_dev
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*
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* @return Result of API execution status
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* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
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*/
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int8_t bme680_init(struct bme680_dev *dev);
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/*!
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* @brief This API writes the given data to the register address
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* of the sensor.
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*
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* @param[in] reg_addr : Register address from where the data to be written.
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* @param[in] reg_data : Pointer to data buffer which is to be written
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* in the sensor.
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* @param[in] len : No of bytes of data to write..
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* @param[in] dev : Structure instance of bme680_dev.
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*
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* @return Result of API execution status
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* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
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*/
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int8_t bme680_set_regs(const uint8_t *reg_addr, const uint8_t *reg_data, uint8_t len, struct bme680_dev *dev);
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/*!
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* @brief This API reads the data from the given register address of the sensor.
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*
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* @param[in] reg_addr : Register address from where the data to be read
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* @param[out] reg_data : Pointer to data buffer to store the read data.
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* @param[in] len : No of bytes of data to be read.
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* @param[in] dev : Structure instance of bme680_dev.
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*
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* @return Result of API execution status
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* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
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*/
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int8_t bme680_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint16_t len, struct bme680_dev *dev);
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/*!
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* @brief This API performs the soft reset of the sensor.
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*
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* @param[in] dev : Structure instance of bme680_dev.
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*
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* @return Result of API execution status
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* @retval zero -> Success / +ve value -> Warning / -ve value -> Error.
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*/
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int8_t bme680_soft_reset(struct bme680_dev *dev);
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/*!
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* @brief This API is used to set the power mode of the sensor.
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*
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* @param[in] dev : Structure instance of bme680_dev
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* @note : Pass the value to bme680_dev.power_mode structure variable.
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*
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* value | mode
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* -------------|------------------
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* 0x00 | BME680_SLEEP_MODE
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* 0x01 | BME680_FORCED_MODE
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*
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* * @return Result of API execution status
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* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
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*/
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int8_t bme680_set_sensor_mode(struct bme680_dev *dev);
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/*!
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* @brief This API is used to get the power mode of the sensor.
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*
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* @param[in] dev : Structure instance of bme680_dev
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* @note : bme680_dev.power_mode structure variable hold the power mode.
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*
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* value | mode
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* ---------|------------------
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* 0x00 | BME680_SLEEP_MODE
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* 0x01 | BME680_FORCED_MODE
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*
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* @return Result of API execution status
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* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
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*/
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int8_t bme680_get_sensor_mode(struct bme680_dev *dev);
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/*!
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* @brief This API is used to set the profile duration of the sensor.
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*
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* @param[in] dev : Structure instance of bme680_dev.
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* @param[in] duration : Duration of the measurement in ms.
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*
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* @return Nothing
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*/
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void bme680_set_profile_dur(uint16_t duration, struct bme680_dev *dev);
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/*!
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* @brief This API is used to get the profile duration of the sensor.
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*
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* @param[in] dev : Structure instance of bme680_dev.
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||||
* @param[in] duration : Duration of the measurement in ms.
|
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*
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* @return Nothing
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*/
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void bme680_get_profile_dur(uint16_t *duration, const struct bme680_dev *dev);
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/*!
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* @brief This API reads the pressure, temperature and humidity and gas data
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* from the sensor, compensates the data and store it in the bme680_data
|
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* structure instance passed by the user.
|
||||
*
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||||
* @param[out] data: Structure instance to hold the data.
|
||||
* @param[in] dev : Structure instance of bme680_dev.
|
||||
*
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||||
* @return Result of API execution status
|
||||
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
|
||||
*/
|
||||
int8_t bme680_get_sensor_data(struct bme680_field_data *data, struct bme680_dev *dev);
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||||
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||||
/*!
|
||||
* @brief This API is used to set the oversampling, filter and T,P,H, gas selection
|
||||
* settings in the sensor.
|
||||
*
|
||||
* @param[in] dev : Structure instance of bme680_dev.
|
||||
* @param[in] desired_settings : Variable used to select the settings which
|
||||
* are to be set in the sensor.
|
||||
*
|
||||
* Macros | Functionality
|
||||
*---------------------------------|----------------------------------------------
|
||||
* BME680_OST_SEL | To set temperature oversampling.
|
||||
* BME680_OSP_SEL | To set pressure oversampling.
|
||||
* BME680_OSH_SEL | To set humidity oversampling.
|
||||
* BME680_GAS_MEAS_SEL | To set gas measurement setting.
|
||||
* BME680_FILTER_SEL | To set filter setting.
|
||||
* BME680_HCNTRL_SEL | To set humidity control setting.
|
||||
* BME680_RUN_GAS_SEL | To set run gas setting.
|
||||
* BME680_NBCONV_SEL | To set NB conversion setting.
|
||||
* BME680_GAS_SENSOR_SEL | To set all gas sensor related settings
|
||||
*
|
||||
* @note : Below are the macros to be used by the user for selecting the
|
||||
* desired settings. User can do OR operation of these macros for configuring
|
||||
* multiple settings.
|
||||
*
|
||||
* @return Result of API execution status
|
||||
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error.
|
||||
*/
|
||||
int8_t bme680_set_sensor_settings(uint16_t desired_settings, struct bme680_dev *dev);
|
||||
|
||||
/*!
|
||||
* @brief This API is used to get the oversampling, filter and T,P,H, gas selection
|
||||
* settings in the sensor.
|
||||
*
|
||||
* @param[in] dev : Structure instance of bme680_dev.
|
||||
* @param[in] desired_settings : Variable used to select the settings which
|
||||
* are to be get from the sensor.
|
||||
*
|
||||
* @return Result of API execution status
|
||||
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error.
|
||||
*/
|
||||
int8_t bme680_get_sensor_settings(uint16_t desired_settings, struct bme680_dev *dev);
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /* End of CPP guard */
|
||||
#endif /* BME680_H_ */
|
||||
/** @}*/
|
||||
@@ -0,0 +1,545 @@
|
||||
/**
|
||||
* Copyright (C) 2017 - 2018 Bosch Sensortec GmbH
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
*
|
||||
* Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* Neither the name of the copyright holder nor the names of the
|
||||
* contributors may be used to endorse or promote products derived from
|
||||
* this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
|
||||
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
|
||||
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
||||
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
||||
* DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
|
||||
* OR CONTRIBUTORS BE LIABLE FOR ANY
|
||||
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
|
||||
* OR CONSEQUENTIAL DAMAGES(INCLUDING, BUT NOT LIMITED TO,
|
||||
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||||
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
|
||||
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||||
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||||
* ANY WAY OUT OF THE USE OF THIS
|
||||
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
|
||||
*
|
||||
* The information provided is believed to be accurate and reliable.
|
||||
* The copyright holder 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 the copyright holder.
|
||||
*
|
||||
* @file bme680_defs.h
|
||||
* @date 19 Jun 2018
|
||||
* @version 3.5.9
|
||||
* @brief
|
||||
*
|
||||
*/
|
||||
|
||||
/*! @file bme680_defs.h
|
||||
@brief Sensor driver for BME680 sensor */
|
||||
/*!
|
||||
* @defgroup BME680 SENSOR API
|
||||
* @brief
|
||||
* @{*/
|
||||
#ifndef BME680_DEFS_H_
|
||||
#define BME680_DEFS_H_
|
||||
|
||||
/********************************************************/
|
||||
/* header includes */
|
||||
#ifdef __KERNEL__
|
||||
#include <linux/types.h>
|
||||
#include <linux/kernel.h>
|
||||
#else
|
||||
#include <stdint.h>
|
||||
#include <stddef.h>
|
||||
#endif
|
||||
|
||||
/******************************************************************************/
|
||||
/*! @name Common macros */
|
||||
/******************************************************************************/
|
||||
|
||||
#if !defined(UINT8_C) && !defined(INT8_C)
|
||||
#define INT8_C(x) S8_C(x)
|
||||
#define UINT8_C(x) U8_C(x)
|
||||
#endif
|
||||
|
||||
#if !defined(UINT16_C) && !defined(INT16_C)
|
||||
#define INT16_C(x) S16_C(x)
|
||||
#define UINT16_C(x) U16_C(x)
|
||||
#endif
|
||||
|
||||
#if !defined(INT32_C) && !defined(UINT32_C)
|
||||
#define INT32_C(x) S32_C(x)
|
||||
#define UINT32_C(x) U32_C(x)
|
||||
#endif
|
||||
|
||||
#if !defined(INT64_C) && !defined(UINT64_C)
|
||||
#define INT64_C(x) S64_C(x)
|
||||
#define UINT64_C(x) U64_C(x)
|
||||
#endif
|
||||
|
||||
/**@}*/
|
||||
|
||||
/**\name C standard macros */
|
||||
#ifndef NULL
|
||||
#ifdef __cplusplus
|
||||
#define NULL 0
|
||||
#else
|
||||
#define NULL ((void *) 0)
|
||||
#endif
|
||||
#endif
|
||||
|
||||
/** BME680 configuration macros */
|
||||
/** Enable or un-comment the macro to provide floating point data output */
|
||||
#ifndef BME680_FLOAT_POINT_COMPENSATION
|
||||
/* #define BME680_FLOAT_POINT_COMPENSATION */
|
||||
#endif
|
||||
|
||||
/** BME680 General config */
|
||||
#define BME680_POLL_PERIOD_MS UINT8_C(10)
|
||||
|
||||
/** BME680 I2C addresses */
|
||||
#define BME680_I2C_ADDR_PRIMARY UINT8_C(0x76)
|
||||
#define BME680_I2C_ADDR_SECONDARY UINT8_C(0x77)
|
||||
|
||||
/** BME680 unique chip identifier */
|
||||
#define BME680_CHIP_ID UINT8_C(0x61)
|
||||
|
||||
/** BME680 coefficients related defines */
|
||||
#define BME680_COEFF_SIZE UINT8_C(41)
|
||||
#define BME680_COEFF_ADDR1_LEN UINT8_C(25)
|
||||
#define BME680_COEFF_ADDR2_LEN UINT8_C(16)
|
||||
|
||||
/** BME680 field_x related defines */
|
||||
#define BME680_FIELD_LENGTH UINT8_C(15)
|
||||
#define BME680_FIELD_ADDR_OFFSET UINT8_C(17)
|
||||
|
||||
/** Soft reset command */
|
||||
#define BME680_SOFT_RESET_CMD UINT8_C(0xb6)
|
||||
|
||||
/** Error code definitions */
|
||||
#define BME680_OK INT8_C(0)
|
||||
/* Errors */
|
||||
#define BME680_E_NULL_PTR INT8_C(-1)
|
||||
#define BME680_E_COM_FAIL INT8_C(-2)
|
||||
#define BME680_E_DEV_NOT_FOUND INT8_C(-3)
|
||||
#define BME680_E_INVALID_LENGTH INT8_C(-4)
|
||||
|
||||
/* Warnings */
|
||||
#define BME680_W_DEFINE_PWR_MODE INT8_C(1)
|
||||
#define BME680_W_NO_NEW_DATA INT8_C(2)
|
||||
|
||||
/* Info's */
|
||||
#define BME680_I_MIN_CORRECTION UINT8_C(1)
|
||||
#define BME680_I_MAX_CORRECTION UINT8_C(2)
|
||||
|
||||
/** Register map */
|
||||
/** Other coefficient's address */
|
||||
#define BME680_ADDR_RES_HEAT_VAL_ADDR UINT8_C(0x00)
|
||||
#define BME680_ADDR_RES_HEAT_RANGE_ADDR UINT8_C(0x02)
|
||||
#define BME680_ADDR_RANGE_SW_ERR_ADDR UINT8_C(0x04)
|
||||
#define BME680_ADDR_SENS_CONF_START UINT8_C(0x5A)
|
||||
#define BME680_ADDR_GAS_CONF_START UINT8_C(0x64)
|
||||
|
||||
/** Field settings */
|
||||
#define BME680_FIELD0_ADDR UINT8_C(0x1d)
|
||||
|
||||
/** Heater settings */
|
||||
#define BME680_RES_HEAT0_ADDR UINT8_C(0x5a)
|
||||
#define BME680_GAS_WAIT0_ADDR UINT8_C(0x64)
|
||||
|
||||
/** Sensor configuration registers */
|
||||
#define BME680_CONF_HEAT_CTRL_ADDR UINT8_C(0x70)
|
||||
#define BME680_CONF_ODR_RUN_GAS_NBC_ADDR UINT8_C(0x71)
|
||||
#define BME680_CONF_OS_H_ADDR UINT8_C(0x72)
|
||||
#define BME680_MEM_PAGE_ADDR UINT8_C(0xf3)
|
||||
#define BME680_CONF_T_P_MODE_ADDR UINT8_C(0x74)
|
||||
#define BME680_CONF_ODR_FILT_ADDR UINT8_C(0x75)
|
||||
|
||||
/** Coefficient's address */
|
||||
#define BME680_COEFF_ADDR1 UINT8_C(0x89)
|
||||
#define BME680_COEFF_ADDR2 UINT8_C(0xe1)
|
||||
|
||||
/** Chip identifier */
|
||||
#define BME680_CHIP_ID_ADDR UINT8_C(0xd0)
|
||||
|
||||
/** Soft reset register */
|
||||
#define BME680_SOFT_RESET_ADDR UINT8_C(0xe0)
|
||||
|
||||
/** Heater control settings */
|
||||
#define BME680_ENABLE_HEATER UINT8_C(0x00)
|
||||
#define BME680_DISABLE_HEATER UINT8_C(0x08)
|
||||
|
||||
/** Gas measurement settings */
|
||||
#define BME680_DISABLE_GAS_MEAS UINT8_C(0x00)
|
||||
#define BME680_ENABLE_GAS_MEAS UINT8_C(0x01)
|
||||
|
||||
/** Over-sampling settings */
|
||||
#define BME680_OS_NONE UINT8_C(0)
|
||||
#define BME680_OS_1X UINT8_C(1)
|
||||
#define BME680_OS_2X UINT8_C(2)
|
||||
#define BME680_OS_4X UINT8_C(3)
|
||||
#define BME680_OS_8X UINT8_C(4)
|
||||
#define BME680_OS_16X UINT8_C(5)
|
||||
|
||||
/** IIR filter settings */
|
||||
#define BME680_FILTER_SIZE_0 UINT8_C(0)
|
||||
#define BME680_FILTER_SIZE_1 UINT8_C(1)
|
||||
#define BME680_FILTER_SIZE_3 UINT8_C(2)
|
||||
#define BME680_FILTER_SIZE_7 UINT8_C(3)
|
||||
#define BME680_FILTER_SIZE_15 UINT8_C(4)
|
||||
#define BME680_FILTER_SIZE_31 UINT8_C(5)
|
||||
#define BME680_FILTER_SIZE_63 UINT8_C(6)
|
||||
#define BME680_FILTER_SIZE_127 UINT8_C(7)
|
||||
|
||||
/** Power mode settings */
|
||||
#define BME680_SLEEP_MODE UINT8_C(0)
|
||||
#define BME680_FORCED_MODE UINT8_C(1)
|
||||
|
||||
/** Delay related macro declaration */
|
||||
#define BME680_RESET_PERIOD UINT32_C(10)
|
||||
|
||||
/** SPI memory page settings */
|
||||
#define BME680_MEM_PAGE0 UINT8_C(0x10)
|
||||
#define BME680_MEM_PAGE1 UINT8_C(0x00)
|
||||
|
||||
/** Ambient humidity shift value for compensation */
|
||||
#define BME680_HUM_REG_SHIFT_VAL UINT8_C(4)
|
||||
|
||||
/** Run gas enable and disable settings */
|
||||
#define BME680_RUN_GAS_DISABLE UINT8_C(0)
|
||||
#define BME680_RUN_GAS_ENABLE UINT8_C(1)
|
||||
|
||||
/** Buffer length macro declaration */
|
||||
#define BME680_TMP_BUFFER_LENGTH UINT8_C(40)
|
||||
#define BME680_REG_BUFFER_LENGTH UINT8_C(6)
|
||||
#define BME680_FIELD_DATA_LENGTH UINT8_C(3)
|
||||
#define BME680_GAS_REG_BUF_LENGTH UINT8_C(20)
|
||||
|
||||
/** Settings selector */
|
||||
#define BME680_OST_SEL UINT16_C(1)
|
||||
#define BME680_OSP_SEL UINT16_C(2)
|
||||
#define BME680_OSH_SEL UINT16_C(4)
|
||||
#define BME680_GAS_MEAS_SEL UINT16_C(8)
|
||||
#define BME680_FILTER_SEL UINT16_C(16)
|
||||
#define BME680_HCNTRL_SEL UINT16_C(32)
|
||||
#define BME680_RUN_GAS_SEL UINT16_C(64)
|
||||
#define BME680_NBCONV_SEL UINT16_C(128)
|
||||
#define BME680_GAS_SENSOR_SEL (BME680_GAS_MEAS_SEL | BME680_RUN_GAS_SEL | BME680_NBCONV_SEL)
|
||||
|
||||
/** Number of conversion settings*/
|
||||
#define BME680_NBCONV_MIN UINT8_C(0)
|
||||
#define BME680_NBCONV_MAX UINT8_C(10)
|
||||
|
||||
/** Mask definitions */
|
||||
#define BME680_GAS_MEAS_MSK UINT8_C(0x30)
|
||||
#define BME680_NBCONV_MSK UINT8_C(0X0F)
|
||||
#define BME680_FILTER_MSK UINT8_C(0X1C)
|
||||
#define BME680_OST_MSK UINT8_C(0XE0)
|
||||
#define BME680_OSP_MSK UINT8_C(0X1C)
|
||||
#define BME680_OSH_MSK UINT8_C(0X07)
|
||||
#define BME680_HCTRL_MSK UINT8_C(0x08)
|
||||
#define BME680_RUN_GAS_MSK UINT8_C(0x10)
|
||||
#define BME680_MODE_MSK UINT8_C(0x03)
|
||||
#define BME680_RHRANGE_MSK UINT8_C(0x30)
|
||||
#define BME680_RSERROR_MSK UINT8_C(0xf0)
|
||||
#define BME680_NEW_DATA_MSK UINT8_C(0x80)
|
||||
#define BME680_GAS_INDEX_MSK UINT8_C(0x0f)
|
||||
#define BME680_GAS_RANGE_MSK UINT8_C(0x0f)
|
||||
#define BME680_GASM_VALID_MSK UINT8_C(0x20)
|
||||
#define BME680_HEAT_STAB_MSK UINT8_C(0x10)
|
||||
#define BME680_MEM_PAGE_MSK UINT8_C(0x10)
|
||||
#define BME680_SPI_RD_MSK UINT8_C(0x80)
|
||||
#define BME680_SPI_WR_MSK UINT8_C(0x7f)
|
||||
#define BME680_BIT_H1_DATA_MSK UINT8_C(0x0F)
|
||||
|
||||
/** Bit position definitions for sensor settings */
|
||||
#define BME680_GAS_MEAS_POS UINT8_C(4)
|
||||
#define BME680_FILTER_POS UINT8_C(2)
|
||||
#define BME680_OST_POS UINT8_C(5)
|
||||
#define BME680_OSP_POS UINT8_C(2)
|
||||
#define BME680_RUN_GAS_POS UINT8_C(4)
|
||||
|
||||
/** Array Index to Field data mapping for Calibration Data*/
|
||||
#define BME680_T2_LSB_REG (1)
|
||||
#define BME680_T2_MSB_REG (2)
|
||||
#define BME680_T3_REG (3)
|
||||
#define BME680_P1_LSB_REG (5)
|
||||
#define BME680_P1_MSB_REG (6)
|
||||
#define BME680_P2_LSB_REG (7)
|
||||
#define BME680_P2_MSB_REG (8)
|
||||
#define BME680_P3_REG (9)
|
||||
#define BME680_P4_LSB_REG (11)
|
||||
#define BME680_P4_MSB_REG (12)
|
||||
#define BME680_P5_LSB_REG (13)
|
||||
#define BME680_P5_MSB_REG (14)
|
||||
#define BME680_P7_REG (15)
|
||||
#define BME680_P6_REG (16)
|
||||
#define BME680_P8_LSB_REG (19)
|
||||
#define BME680_P8_MSB_REG (20)
|
||||
#define BME680_P9_LSB_REG (21)
|
||||
#define BME680_P9_MSB_REG (22)
|
||||
#define BME680_P10_REG (23)
|
||||
#define BME680_H2_MSB_REG (25)
|
||||
#define BME680_H2_LSB_REG (26)
|
||||
#define BME680_H1_LSB_REG (26)
|
||||
#define BME680_H1_MSB_REG (27)
|
||||
#define BME680_H3_REG (28)
|
||||
#define BME680_H4_REG (29)
|
||||
#define BME680_H5_REG (30)
|
||||
#define BME680_H6_REG (31)
|
||||
#define BME680_H7_REG (32)
|
||||
#define BME680_T1_LSB_REG (33)
|
||||
#define BME680_T1_MSB_REG (34)
|
||||
#define BME680_GH2_LSB_REG (35)
|
||||
#define BME680_GH2_MSB_REG (36)
|
||||
#define BME680_GH1_REG (37)
|
||||
#define BME680_GH3_REG (38)
|
||||
|
||||
/** BME680 register buffer index settings*/
|
||||
#define BME680_REG_FILTER_INDEX UINT8_C(5)
|
||||
#define BME680_REG_TEMP_INDEX UINT8_C(4)
|
||||
#define BME680_REG_PRES_INDEX UINT8_C(4)
|
||||
#define BME680_REG_HUM_INDEX UINT8_C(2)
|
||||
#define BME680_REG_NBCONV_INDEX UINT8_C(1)
|
||||
#define BME680_REG_RUN_GAS_INDEX UINT8_C(1)
|
||||
#define BME680_REG_HCTRL_INDEX UINT8_C(0)
|
||||
|
||||
/** BME680 pressure calculation macros */
|
||||
/*! This max value is used to provide precedence to multiplication or division
|
||||
* in pressure compensation equation to achieve least loss of precision and
|
||||
* avoiding overflows.
|
||||
* i.e Comparing value, BME680_MAX_OVERFLOW_VAL = INT32_C(1 << 30)
|
||||
*/
|
||||
#define BME680_MAX_OVERFLOW_VAL INT32_C(0x40000000)
|
||||
|
||||
/** Macro to combine two 8 bit data's to form a 16 bit data */
|
||||
#define BME680_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
|
||||
|
||||
/** Macro to SET and GET BITS of a register */
|
||||
#define BME680_SET_BITS(reg_data, bitname, data) \
|
||||
((reg_data & ~(bitname##_MSK)) | \
|
||||
((data << bitname##_POS) & bitname##_MSK))
|
||||
#define BME680_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \
|
||||
(bitname##_POS))
|
||||
|
||||
/** Macro variant to handle the bitname position if it is zero */
|
||||
#define BME680_SET_BITS_POS_0(reg_data, bitname, data) \
|
||||
((reg_data & ~(bitname##_MSK)) | \
|
||||
(data & bitname##_MSK))
|
||||
#define BME680_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK))
|
||||
|
||||
/** Type definitions */
|
||||
/*!
|
||||
* Generic communication function pointer
|
||||
* @param[in] dev_id: Place holder to store the id of the device structure
|
||||
* Can be used to store the index of the Chip select or
|
||||
* I2C address of the device.
|
||||
* @param[in] reg_addr: Used to select the register the where data needs to
|
||||
* be read from or written to.
|
||||
* @param[in/out] reg_data: Data array to read/write
|
||||
* @param[in] len: Length of the data array
|
||||
*/
|
||||
typedef int8_t (*bme680_com_fptr_t)(uint8_t dev_id, uint8_t reg_addr, uint8_t *data, uint16_t len);
|
||||
|
||||
/*!
|
||||
* Delay function pointer
|
||||
* @param[in] period: Time period in milliseconds
|
||||
*/
|
||||
typedef void (*bme680_delay_fptr_t)(uint32_t period);
|
||||
|
||||
/*!
|
||||
* @brief Interface selection Enumerations
|
||||
*/
|
||||
enum bme680_intf {
|
||||
/*! SPI interface */
|
||||
BME680_SPI_INTF,
|
||||
/*! I2C interface */
|
||||
BME680_I2C_INTF
|
||||
};
|
||||
|
||||
/* structure definitions */
|
||||
/*!
|
||||
* @brief Sensor field data structure
|
||||
*/
|
||||
struct bme680_field_data {
|
||||
/*! Contains new_data, gasm_valid & heat_stab */
|
||||
uint8_t status;
|
||||
/*! The index of the heater profile used */
|
||||
uint8_t gas_index;
|
||||
/*! Measurement index to track order */
|
||||
uint8_t meas_index;
|
||||
|
||||
#ifndef BME680_FLOAT_POINT_COMPENSATION
|
||||
/*! Temperature in degree celsius x100 */
|
||||
int16_t temperature;
|
||||
/*! Pressure in Pascal */
|
||||
uint32_t pressure;
|
||||
/*! Humidity in % relative humidity x1000 */
|
||||
uint32_t humidity;
|
||||
/*! Gas resistance in Ohms */
|
||||
uint32_t gas_resistance;
|
||||
#else
|
||||
/*! Temperature in degree celsius */
|
||||
float temperature;
|
||||
/*! Pressure in Pascal */
|
||||
float pressure;
|
||||
/*! Humidity in % relative humidity x1000 */
|
||||
float humidity;
|
||||
/*! Gas resistance in Ohms */
|
||||
float gas_resistance;
|
||||
|
||||
#endif
|
||||
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief Structure to hold the Calibration data
|
||||
*/
|
||||
struct bme680_calib_data {
|
||||
/*! Variable to store calibrated humidity data */
|
||||
uint16_t par_h1;
|
||||
/*! Variable to store calibrated humidity data */
|
||||
uint16_t par_h2;
|
||||
/*! Variable to store calibrated humidity data */
|
||||
int8_t par_h3;
|
||||
/*! Variable to store calibrated humidity data */
|
||||
int8_t par_h4;
|
||||
/*! Variable to store calibrated humidity data */
|
||||
int8_t par_h5;
|
||||
/*! Variable to store calibrated humidity data */
|
||||
uint8_t par_h6;
|
||||
/*! Variable to store calibrated humidity data */
|
||||
int8_t par_h7;
|
||||
/*! Variable to store calibrated gas data */
|
||||
int8_t par_gh1;
|
||||
/*! Variable to store calibrated gas data */
|
||||
int16_t par_gh2;
|
||||
/*! Variable to store calibrated gas data */
|
||||
int8_t par_gh3;
|
||||
/*! Variable to store calibrated temperature data */
|
||||
uint16_t par_t1;
|
||||
/*! Variable to store calibrated temperature data */
|
||||
int16_t par_t2;
|
||||
/*! Variable to store calibrated temperature data */
|
||||
int8_t par_t3;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
uint16_t par_p1;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
int16_t par_p2;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
int8_t par_p3;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
int16_t par_p4;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
int16_t par_p5;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
int8_t par_p6;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
int8_t par_p7;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
int16_t par_p8;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
int16_t par_p9;
|
||||
/*! Variable to store calibrated pressure data */
|
||||
uint8_t par_p10;
|
||||
|
||||
#ifndef BME680_FLOAT_POINT_COMPENSATION
|
||||
/*! Variable to store t_fine size */
|
||||
int32_t t_fine;
|
||||
#else
|
||||
/*! Variable to store t_fine size */
|
||||
float t_fine;
|
||||
#endif
|
||||
/*! Variable to store heater resistance range */
|
||||
uint8_t res_heat_range;
|
||||
/*! Variable to store heater resistance value */
|
||||
int8_t res_heat_val;
|
||||
/*! Variable to store error range */
|
||||
int8_t range_sw_err;
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief BME680 sensor settings structure which comprises of ODR,
|
||||
* over-sampling and filter settings.
|
||||
*/
|
||||
struct bme680_tph_sett {
|
||||
/*! Humidity oversampling */
|
||||
uint8_t os_hum;
|
||||
/*! Temperature oversampling */
|
||||
uint8_t os_temp;
|
||||
/*! Pressure oversampling */
|
||||
uint8_t os_pres;
|
||||
/*! Filter coefficient */
|
||||
uint8_t filter;
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief BME680 gas sensor which comprises of gas settings
|
||||
* and status parameters
|
||||
*/
|
||||
struct bme680_gas_sett {
|
||||
/*! Variable to store nb conversion */
|
||||
uint8_t nb_conv;
|
||||
/*! Variable to store heater control */
|
||||
uint8_t heatr_ctrl;
|
||||
/*! Run gas enable value */
|
||||
uint8_t run_gas;
|
||||
/*! Heater temperature value */
|
||||
uint16_t heatr_temp;
|
||||
/*! Duration profile value */
|
||||
uint16_t heatr_dur;
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief BME680 device structure
|
||||
*/
|
||||
struct bme680_dev {
|
||||
/*! Chip Id */
|
||||
uint8_t chip_id;
|
||||
/*! Device Id */
|
||||
uint8_t dev_id;
|
||||
/*! SPI/I2C interface */
|
||||
enum bme680_intf intf;
|
||||
/*! Memory page used */
|
||||
uint8_t mem_page;
|
||||
/*! Ambient temperature in Degree C */
|
||||
int8_t amb_temp;
|
||||
/*! Sensor calibration data */
|
||||
struct bme680_calib_data calib;
|
||||
/*! Sensor settings */
|
||||
struct bme680_tph_sett tph_sett;
|
||||
/*! Gas Sensor settings */
|
||||
struct bme680_gas_sett gas_sett;
|
||||
/*! Sensor power modes */
|
||||
uint8_t power_mode;
|
||||
/*! New sensor fields */
|
||||
uint8_t new_fields;
|
||||
/*! Store the info messages */
|
||||
uint8_t info_msg;
|
||||
/*! Bus read function pointer */
|
||||
bme680_com_fptr_t read;
|
||||
/*! Bus write function pointer */
|
||||
bme680_com_fptr_t write;
|
||||
/*! delay function pointer */
|
||||
bme680_delay_fptr_t delay_ms;
|
||||
/*! Communication function result */
|
||||
int8_t com_rslt;
|
||||
};
|
||||
|
||||
|
||||
|
||||
#endif /* BME680_DEFS_H_ */
|
||||
/** @}*/
|
||||
/** @}*/
|
||||
Reference in new issue
Block a user