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Daniel Friesel authoredDaniel Friesel authored
bme680.h 15.28 KiB
/**
* 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.h
* @date 19 Jun 2018
* @version 3.5.9
* @brief
*
* Adjustments for multipass by Daniel Friesel: C -> C++, multipass i2c integration
*
*/
/*! @file bme680.h
@brief Sensor driver for BME680 sensor */
/*!
* @defgroup BME680 SENSOR API
* @{*/
#ifndef BME680_H_
#define BME680_H_
/* Header includes */
#include "driver/bme680_defs.h"
class BME680 {
private:
BME680(const BME680 ©);
unsigned char txbuf[16];
unsigned char rxbuf[8];
/*! Chip Id */
uint8_t chip_id;
/*! Device Id */
uint8_t dev_id; /*! Memory page used */
uint8_t mem_page;
/*! Sensor calibration data */
struct bme680_calib_data calib;
/*! New sensor fields */
uint8_t new_fields;
/*! Store the info messages */
uint8_t info_msg;
/*! Communication function result */
int8_t com_rslt;
/*!
* @brief This internal API is used to read the calibrated data from the sensor.
*
* This function is used to retrieve the calibration
* data from the image registers of the sensor.
*
* @note Registers 89h to A1h for calibration data 1 to 24
* from bit 0 to 7
* @note Registers E1h to F0h for calibration data 25 to 40
* from bit 0 to 7
*
* @return Result of API execution status.
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t getCalibData();
/*!
* @brief This internal API is used to set the gas configuration of the sensor.
*
* @return Result of API execution status.
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t setGasConfig();
/*!
* @brief This internal API is used to get the gas configuration of the sensor.
* @note heatr_temp and heatr_dur values are currently register data
* and not the actual values set
*
* @return Result of API execution status.
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t getGasConfig();
/*!
* @brief This internal API is used to calculate the Heat duration value.
*
* @param[in] dur :Value of the duration to be shared.
*
* @return uint8_t threshold duration after calculation.
*/
uint8_t calcHeaterDur(uint16_t dur);
#ifndef BME680_FLOAT_POINT_COMPENSATION
/*!
* @brief This internal API is used to calculate the temperature value.
*
* @param[in] temp_adc :Contains the temperature ADC value .
*
* @return uint32_t calculated temperature.
*/
int16_t calcTemperature(uint32_t temp_adc);
/*!
* @brief This internal API is used to calculate the pressure value.
*
* @param[in] pres_adc :Contains the pressure ADC value .
* * @return uint32_t calculated pressure.
*/
uint32_t calcPressure(uint32_t pres_adc);
/*!
* @brief This internal API is used to calculate the humidity value.
*
* @param[in] hum_adc :Contains the humidity ADC value.
*
* @return uint32_t calculated humidity.
*/
uint32_t calcHumidity(uint16_t hum_adc);
/*!
* @brief This internal API is used to calculate the Gas Resistance value.
*
* @param[in] gas_res_adc :Contains the Gas Resistance ADC value.
* @param[in] gas_range :Contains the range of gas values.
*
* @return uint32_t calculated gas resistance.
*/
uint32_t calcGasResistance(uint16_t gas_res_adc, uint8_t gas_range);
/*!
* @brief This internal API is used to calculate the Heat Resistance value.
*
* @param[in] temp : Contains the target temperature value.
*
* @return uint8_t calculated heater resistance.
*/
uint8_t calcHeaterRes(uint16_t temp);
#else
/*!
* @brief This internal API is used to calculate the
* temperature value value in float format
*
* @param[in] temp_adc :Contains the temperature ADC value .
*
* @return Calculated temperature in float
*/
float calcTemperature(uint32_t temp_adc);
/*!
* @brief This internal API is used to calculate the
* pressure value value in float format
*
* @param[in] pres_adc :Contains the pressure ADC value .
*
* @return Calculated pressure in float.
*/
float calcPressure(uint32_t pres_adc);
/*!
* @brief This internal API is used to calculate the
* humidity value value in float format
*
* @param[in] hum_adc :Contains the humidity ADC value.
*
* @return Calculated humidity in float.
*/
float calcHumidity(uint16_t hum_adc);
/*!
* @brief This internal API is used to calculate the
* gas resistance value value in float format
*
* @param[in] gas_res_adc :Contains the Gas Resistance ADC value.
* @param[in] gas_range :Contains the range of gas values.
* * @return Calculated gas resistance in float.
*/
float calcGasResistance(uint16_t gas_res_adc, uint8_t gas_range);
/*!
* @brief This internal API is used to calculate the
* heater resistance value in float format
*
* @param[in] temp : Contains the target temperature value.
*
* @return Calculated heater resistance in float.
*/
float calcHeaterRes(uint16_t temp);
#endif
/*!
* @brief This internal API is used to calculate the field data of sensor.
*
* @param[out] data :Structure instance to hold the data
*
* @return int8_t result of the field data from sensor.
*/
int8_t readFieldData(struct bme680_field_data *data);
/*!
* @brief This internal API is used to set the memory page
* based on register address.
*
* The value of memory page
* value | Description
* --------|--------------
* 0 | BME680_PAGE0_SPI
* 1 | BME680_PAGE1_SPI
*
* @param[in] reg_addr :Contains the register address array.
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t setMemPage(uint8_t reg_addr);
/*!
* @brief This internal API is used to get the memory page based
* on register address.
*
* The value of memory page
* value | Description
* --------|--------------
* 0 | BME680_PAGE0_SPI
* 1 | BME680_PAGE1_SPI
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t getMemPage();
/*!
* @brief This internal API is used to validate the device pointer for
* null conditions.
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t nullPtrCheck();
/*!
* @brief This internal API is used to check the boundary
* conditions.
* * @param[in] value :pointer to the value.
* @param[in] min :minimum value.
* @param[in] max :maximum value.
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t boundaryCheck(uint8_t *value, uint8_t min, uint8_t max);
public:
/*! SPI/I2C interface */
enum bme680_intf intf;
/*! Sensor power modes */
uint8_t power_mode;
/*! Sensor settings */
struct bme680_tph_sett tph_sett;
/*! Gas Sensor settings */
struct bme680_gas_sett gas_sett;
/*! Ambient temperature in Degree C */
int8_t amb_temp;
/*! 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;
BME680(uint8_t const addr) : dev_id(addr) {}
/*!
* @brief This API is the entry point.
* It reads the chip-id and calibration data from the sensor.
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t init();
/*!
* @brief This API writes the given data to the register address
* of the sensor.
*
* @param[in] reg_addr : Register address from where the data to be written.
* @param[in] reg_data : Pointer to data buffer which is to be written
* in the sensor.
* @param[in] len : No of bytes of data to write..
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t setRegs(const uint8_t *reg_addr, const uint8_t *reg_data, uint8_t len);
/*!
* @brief This API reads the data from the given register address of the sensor.
*
* @param[in] reg_addr : Register address from where the data to be read
* @param[out] reg_data : Pointer to data buffer to store the read data.
* @param[in] len : No of bytes of data to be read.
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t getRegs(uint8_t reg_addr, uint8_t *reg_data, uint16_t len);
/*!
* @brief This API performs the soft reset of the sensor.
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error. */
int8_t softReset();
/*!
* @brief This API is used to set the power mode of the sensor.
*
* @note : Pass the value to bme680_dev.power_mode structure variable.
*
* value | mode
* -------------|------------------
* 0x00 | BME680_SLEEP_MODE
* 0x01 | BME680_FORCED_MODE
*
* * @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t setSensorMode();
/*!
* @brief This API is used to get the power mode of the sensor.
*
* @note : bme680_dev.power_mode structure variable hold the power mode.
*
* value | mode
* ---------|------------------
* 0x00 | BME680_SLEEP_MODE
* 0x01 | BME680_FORCED_MODE
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t getSensorMode();
/*!
* @brief This API is used to set the profile duration of the sensor.
*
* @param[in] duration : Duration of the measurement in ms.
*
* @return Nothing
*/
void setProfileDur(uint16_t duration);
/*!
* @brief This API is used to get the profile duration of the sensor.
*
* @param[in] duration : Duration of the measurement in ms.
*
* @return Nothing
*/
void getProfileDur(uint16_t *duration);
/*!
* @brief This API reads the pressure, temperature and humidity and gas data
* from the sensor, compensates the data and store it in the bme680_data
* structure instance passed by the user.
*
* @param[out] data: Structure instance to hold the data.
*
* @return Result of API execution status
* @retval zero -> Success / +ve value -> Warning / -ve value -> Error
*/
int8_t getSensorData(struct bme680_field_data *data);
/*!
* @brief This API is used to set the oversampling, filter and T,P,H, gas selection
* settings in the sensor.
*
* @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 setSensorSettings(uint16_t desired_settings);
/*!
* @brief This API is used to get the oversampling, filter and T,P,H, gas selection
* settings in the sensor.
*
* @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 getSensorSettings(uint16_t desired_settings);
inline void configure(uint8_t os_hum, uint8_t os_pres, uint8_t os_temp, uint8_t run_gas, uint16_t heatr_dur, uint16_t heatr_temp) {
tph_sett.os_hum = os_hum;
tph_sett.os_pres = os_pres;
tph_sett.os_temp = os_temp;
gas_sett.run_gas = run_gas;
gas_sett.heatr_dur = heatr_dur;
gas_sett.heatr_temp = heatr_temp;
}
inline void setHumidityOversampling(uint8_t os) {
tph_sett.os_hum = os;
}
inline void setPressureOversampling(uint8_t os) {
tph_sett.os_pres = os;
}
inline void setTemperatureOversampling(uint8_t os) {
tph_sett.os_temp = os;
}
inline void setRunGas(uint8_t enabled) {
gas_sett.run_gas = enabled;
}
inline void setHeaterDuration(uint16_t ms) {
gas_sett.heatr_dur = ms;
}
inline void setHeaterTemp(uint16_t degc) {
gas_sett.heatr_temp = degc;
}
inline void setFilter(uint8_t filter) {
tph_sett.filter = filter;
}
inline void setPowerMode(uint8_t mode) {
power_mode = mode;
}
};
extern BME680 bme680;
#endif /* BME680_H_ */
/** @}*/