diff --git a/.gitignore b/.gitignore deleted file mode 100644 index f1cfff9..0000000 --- a/.gitignore +++ /dev/null @@ -1,24 +0,0 @@ -### Project Specific -# Files -*.a -*.o -*.log - -# Directories - -### Editor Specific -# Files -temperatureRecorder.sublime-project -temperatureRecorder.sublime-workspace - -# Directories -.idea -.vscode - -### System Specific -# Files -.DS_Store -Thumbs.db - -# Directories -__MACOSX diff --git a/Makefile b/Makefile deleted file mode 100644 index b5188d5..0000000 --- a/Makefile +++ /dev/null @@ -1,22 +0,0 @@ -STANDARD := gnu99 -DEBUG_DIR := build/Debug -BIN_DEBUG_DIR := bin/Debug -RELEASE_DIR := build/Release -BIN_RELEASE_DIR := bin/Release - -debug: - gcc -Wall -fPIC -pg -g -c src/bme280/bme280.c -o $(DEBUG_DIR)/bme280.o -std=${STANDARD} - gcc -Wall -fPIC -pg -g -c src/main.c -o $(DEBUG_DIR)/main.o -std=${STANDARD} - gcc -Wall -fPIC -pg -g -o $(BIN_DEBUG_DIR)/tempRecord $(DEBUG_DIR)/main.o $(DEBUG_DIR)/bme280.o -std=${STANDARD} - -release: - gcc -Wall -fPIC -O2 -c src/bme280/bme280.c -o $(RELEASE_DIR)/bme280.o -std=${STANDARD} - gcc -Wall -fPIC -O2 -c src/main.c -o $(RELEASE_DIR)/main.o -std=${STANDARD} - gcc -Wall -fPIC -O2 -o $(BIN_RELEASE_DIR)/tempRecord $(RELEASE_DIR)/main.o $(RELEASE_DIR)/bme280.o -std=${STANDARD} - - -.PHONY clean: - rm -rf -v !\(.gitignore\) $(DEBUG_DIR)/* - rm -rf -v !\(.gitignore\) $(BIN_DEBUG_DIR)/* - rm -rf -v !\(.gitignore\) $(RELEASE_DIR)/* - rm -rf -v !\(.gitignore\) $(BIN_RELEASE_DIR)/* diff --git a/bin/Debug/.gitignore b/bin/Debug/.gitignore deleted file mode 100644 index d6b7ef3..0000000 --- a/bin/Debug/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -* -!.gitignore diff --git a/bin/Release/.gitignore b/bin/Release/.gitignore deleted file mode 100644 index d6b7ef3..0000000 --- a/bin/Release/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -* -!.gitignore diff --git a/build/Debug/.gitignore b/build/Debug/.gitignore deleted file mode 100644 index d6b7ef3..0000000 --- a/build/Debug/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -* -!.gitignore diff --git a/build/Release/.gitignore b/build/Release/.gitignore deleted file mode 100644 index d6b7ef3..0000000 --- a/build/Release/.gitignore +++ /dev/null @@ -1,2 +0,0 @@ -* -!.gitignore diff --git a/src/bme280/bme280.c b/src/bme280/bme280.c deleted file mode 100644 index 203ccea..0000000 --- a/src/bme280/bme280.c +++ /dev/null @@ -1,1273 +0,0 @@ -/**\mainpage - * Copyright (C) 2016 - 2017 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 bme280.c - * Date 14 Feb 2018 - * Version 3.3.4 - * - */ - -/*! @file bme280.c - @brief Sensor driver for BME280 sensor */ -#include "bme280.h" - -/**\name Internal macros */ -/* To identify osr settings selected by user */ -#define OVERSAMPLING_SETTINGS UINT8_C(0x07) -/* To identify filter and standby settings selected by user */ -#define FILTER_STANDBY_SETTINGS UINT8_C(0x18) - -/*! - * @brief This internal API puts the device to sleep mode. - * - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status. - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t put_device_to_sleep(const struct bme280_dev *dev); - -/*! - * @brief This internal API writes the power mode in the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[in] sensor_mode : Variable which contains the power mode to be set. - * - * @return Result of API execution status. - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t write_power_mode(uint8_t sensor_mode, const struct bme280_dev *dev); - -/*! - * @brief This internal API is used to validate the device pointer for - * null conditions. - * - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t null_ptr_check(const struct bme280_dev *dev); - -/*! - * @brief This internal API interleaves the register address between the - * register data buffer for burst write operation. - * - * @param[in] reg_addr : Contains the register address array. - * @param[out] temp_buff : Contains the temporary buffer to store the - * register data and register address. - * @param[in] reg_data : Contains the register data to be written in the - * temporary buffer. - * @param[in] len : No of bytes of data to be written for burst write. - */ -static void interleave_reg_addr(const uint8_t *reg_addr, uint8_t *temp_buff, const uint8_t *reg_data, uint8_t len); - -/*! - * @brief This internal API reads the calibration data from the sensor, parse - * it and store in the device structure. - * - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t get_calib_data(struct bme280_dev *dev); - -/*! - * @brief This internal API is used to parse the temperature and - * pressure calibration data and store it in the device structure. - * - * @param[out] dev : Structure instance of bme280_dev to store the calib data. - * @param[in] reg_data : Contains the calibration data to be parsed. - */ -static void parse_temp_press_calib_data(const uint8_t *reg_data, struct bme280_dev *dev); - -/*! - * @brief This internal API is used to parse the humidity calibration data - * and store it in device structure. - * - * @param[out] dev : Structure instance of bme280_dev to store the calib data. - * @param[in] reg_data : Contains calibration data to be parsed. - */ -static void parse_humidity_calib_data(const uint8_t *reg_data, struct bme280_dev *dev); - -#ifdef BME280_FLOAT_ENABLE -/*! - * @brief This internal API is used to compensate the raw pressure data and - * return the compensated pressure data in double data type. - * - * @param[in] uncomp_data : Contains the uncompensated pressure data. - * @param[in] calib_data : Pointer to the calibration data structure. - * - * @return Compensated pressure data. - * @retval Compensated pressure data in double. - */ -static double compensate_pressure(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data); - -/*! - * @brief This internal API is used to compensate the raw humidity data and - * return the compensated humidity data in double data type. - * - * @param[in] uncomp_data : Contains the uncompensated humidity data. - * @param[in] calib_data : Pointer to the calibration data structure. - * - * @return Compensated humidity data. - * @retval Compensated humidity data in double. - */ -static double compensate_humidity(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data); - -/*! - * @brief This internal API is used to compensate the raw temperature data and - * return the compensated temperature data in double data type. - * - * @param[in] uncomp_data : Contains the uncompensated temperature data. - * @param[in] calib_data : Pointer to calibration data structure. - * - * @return Compensated temperature data. - * @retval Compensated temperature data in double. - */ -static double compensate_temperature(const struct bme280_uncomp_data *uncomp_data, - struct bme280_calib_data *calib_data); - -#else - -/*! - * @brief This internal API is used to compensate the raw temperature data and - * return the compensated temperature data in integer data type. - * - * @param[in] uncomp_data : Contains the uncompensated temperature data. - * @param[in] calib_data : Pointer to calibration data structure. - * - * @return Compensated temperature data. - * @retval Compensated temperature data in integer. - */ -static int32_t compensate_temperature(const struct bme280_uncomp_data *uncomp_data, - struct bme280_calib_data *calib_data); - -/*! - * @brief This internal API is used to compensate the raw pressure data and - * return the compensated pressure data in integer data type. - * - * @param[in] uncomp_data : Contains the uncompensated pressure data. - * @param[in] calib_data : Pointer to the calibration data structure. - * - * @return Compensated pressure data. - * @retval Compensated pressure data in integer. - */ -static uint32_t compensate_pressure(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data); - -/*! - * @brief This internal API is used to compensate the raw humidity data and - * return the compensated humidity data in integer data type. - * - * @param[in] uncomp_data : Contains the uncompensated humidity data. - * @param[in] calib_data : Pointer to the calibration data structure. - * - * @return Compensated humidity data. - * @retval Compensated humidity data in integer. - */ -static uint32_t compensate_humidity(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data); - -#endif - -/*! - * @brief This internal API is used to identify the settings which the user - * wants to modify in the sensor. - * - * @param[in] sub_settings : Contains the settings subset to identify particular - * group of settings which the user is interested to change. - * @param[in] desired_settings : Contains the user specified settings. - * - * @return Indicates whether user is interested to modify the settings which - * are related to sub_settings. - * @retval True -> User wants to modify this group of settings - * @retval False -> User does not want to modify this group of settings - */ -static uint8_t are_settings_changed(uint8_t sub_settings, uint8_t desired_settings); - -/*! - * @brief This API sets the humidity oversampling settings of the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t set_osr_humidity_settings(const struct bme280_settings *settings, const struct bme280_dev *dev); - -/*! - * @brief This internal API sets the oversampling settings for pressure, - * temperature and humidity in the sensor. - * - * @param[in] desired_settings : Variable used to select the settings which - * are to be set. - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_settings *settings, - const struct bme280_dev *dev); - -/*! - * @brief This API sets the pressure and/or temperature oversampling settings - * in the sensor according to the settings selected by the user. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[in] desired_settings: variable to select the pressure and/or - * temperature oversampling settings. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t set_osr_press_temp_settings(uint8_t desired_settings, const struct bme280_settings *settings, - const struct bme280_dev *dev); - -/*! - * @brief This internal API fills the pressure oversampling settings provided by - * the user in the data buffer so as to write in the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[out] reg_data : Variable which is filled according to the pressure - * oversampling data provided by the user. - */ -static void fill_osr_press_settings(uint8_t *reg_data, const struct bme280_settings *settings); - -/*! - * @brief This internal API fills the temperature oversampling settings provided - * by the user in the data buffer so as to write in the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[out] reg_data : Variable which is filled according to the temperature - * oversampling data provided by the user. - */ -static void fill_osr_temp_settings(uint8_t *reg_data, const struct bme280_settings *settings); - -/*! - * @brief This internal API sets the filter and/or standby duration settings - * in the sensor according to the settings selected by the user. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[in] desired_settings : variable to select the filter and/or - * standby duration settings. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t set_filter_standby_settings(uint8_t desired_settings, const struct bme280_settings *settings, - const struct bme280_dev *dev); - -/*! - * @brief This internal API fills the filter settings provided by the user - * in the data buffer so as to write in the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[out] reg_data : Variable which is filled according to the filter - * settings data provided by the user. - */ -static void fill_filter_settings(uint8_t *reg_data, const struct bme280_settings *settings); - -/*! - * @brief This internal API fills the standby duration settings provided by the - * user in the data buffer so as to write in the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[out] reg_data : Variable which is filled according to the standby - * settings data provided by the user. - */ -static void fill_standby_settings(uint8_t *reg_data, const struct bme280_settings *settings); - -/*! - * @brief This internal API parse the oversampling(pressure, temperature - * and humidity), filter and standby duration settings and store in the - * device structure. - * - * @param[out] dev : Structure instance of bme280_dev. - * @param[in] reg_data : Register data to be parsed. - */ -static void parse_device_settings(const uint8_t *reg_data, struct bme280_settings *settings); - -/*! - * @brief This internal API reloads the already existing device settings in the - * sensor after soft reset. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[in] settings : Pointer variable which contains the settings to - * be set in the sensor. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t reload_device_settings(const struct bme280_settings *settings, const struct bme280_dev *dev); - -/****************** Global Function Definitions *******************************/ - -/*! - * @brief This API is the entry point. - * It reads the chip-id and calibration data from the sensor. - */ -int8_t bme280_init(struct bme280_dev *dev) -{ - int8_t rslt; - /* chip id read try count */ - uint8_t try_count = 5; - uint8_t chip_id = 0; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - /* Proceed if null check is fine */ - if (rslt == BME280_OK) { - while (try_count) { - /* Read the chip-id of bme280 sensor */ - rslt = bme280_get_regs(BME280_CHIP_ID_ADDR, &chip_id, 1, dev); - /* Check for chip id validity */ - if ((rslt == BME280_OK) && (chip_id == BME280_CHIP_ID)) { - dev->chip_id = chip_id; - /* Reset the sensor */ - rslt = bme280_soft_reset(dev); - if (rslt == BME280_OK) { - /* Read the calibration data */ - rslt = get_calib_data(dev); - } - break; - } - /* Wait for 1 ms */ - dev->delay_ms(1); - --try_count; - } - /* Chip id check failed */ - if (!try_count) - rslt = BME280_E_DEV_NOT_FOUND; - } - - return rslt; -} - -/*! - * @brief This API reads the data from the given register address of the sensor. - */ -int8_t bme280_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint16_t len, const struct bme280_dev *dev) -{ - int8_t rslt; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - /* Proceed if null check is fine */ - if (rslt == BME280_OK) { - /* If interface selected is SPI */ - if (dev->intf != BME280_I2C_INTF) - reg_addr = reg_addr | 0x80; - /* Read the data */ - rslt = dev->read(dev->dev_id, reg_addr, reg_data, len); - /* Check for communication error */ - if (rslt != BME280_OK) - rslt = BME280_E_COMM_FAIL; - } - - return rslt; -} - -/*! - * @brief This API writes the given data to the register address - * of the sensor. - */ -int8_t bme280_set_regs(uint8_t *reg_addr, const uint8_t *reg_data, uint8_t len, const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t temp_buff[20]; /* Typically not to write more than 10 registers */ - - if (len > 10) - len = 10; - - uint16_t temp_len; - uint8_t reg_addr_cnt; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - /* Check for arguments validity */ - if ((rslt == BME280_OK) && (reg_addr != NULL) && (reg_data != NULL)) { - if (len != 0) { - temp_buff[0] = reg_data[0]; - /* If interface selected is SPI */ - if (dev->intf != BME280_I2C_INTF) { - for (reg_addr_cnt = 0; reg_addr_cnt < len; reg_addr_cnt++) - reg_addr[reg_addr_cnt] = reg_addr[reg_addr_cnt] & 0x7F; - } - /* Burst write mode */ - if (len > 1) { - /* Interleave register address w.r.t data for - burst write*/ - interleave_reg_addr(reg_addr, temp_buff, reg_data, len); - temp_len = ((len * 2) - 1); - } else { - temp_len = len; - } - rslt = dev->write(dev->dev_id, reg_addr[0], temp_buff, temp_len); - /* Check for communication error */ - if (rslt != BME280_OK) - rslt = BME280_E_COMM_FAIL; - } else { - rslt = BME280_E_INVALID_LEN; - } - } else { - rslt = BME280_E_NULL_PTR; - } - - - return rslt; -} - -/*! - * @brief This API sets the oversampling, filter and standby duration - * (normal mode) settings in the sensor. - */ -int8_t bme280_set_sensor_settings(uint8_t desired_settings, const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t sensor_mode; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - /* Proceed if null check is fine */ - if (rslt == BME280_OK) { - rslt = bme280_get_sensor_mode(&sensor_mode, dev); - if ((rslt == BME280_OK) && (sensor_mode != BME280_SLEEP_MODE)) - rslt = put_device_to_sleep(dev); - if (rslt == BME280_OK) { - /* Check if user wants to change oversampling - settings */ - if (are_settings_changed(OVERSAMPLING_SETTINGS, desired_settings)) - rslt = set_osr_settings(desired_settings, &dev->settings, dev); - /* Check if user wants to change filter and/or - standby settings */ - if ((rslt == BME280_OK) && are_settings_changed(FILTER_STANDBY_SETTINGS, desired_settings)) - rslt = set_filter_standby_settings(desired_settings, &dev->settings, dev); - } - } - - return rslt; -} - -/*! - * @brief This API gets the oversampling, filter and standby duration - * (normal mode) settings from the sensor. - */ -int8_t bme280_get_sensor_settings(struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_data[4]; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - /* Proceed if null check is fine */ - if (rslt == BME280_OK) { - rslt = bme280_get_regs(BME280_CTRL_HUM_ADDR, reg_data, 4, dev); - if (rslt == BME280_OK) - parse_device_settings(reg_data, &dev->settings); - } - - return rslt; -} - -/*! - * @brief This API sets the power mode of the sensor. - */ -int8_t bme280_set_sensor_mode(uint8_t sensor_mode, const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t last_set_mode; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - - if (rslt == BME280_OK) { - rslt = bme280_get_sensor_mode(&last_set_mode, dev); - /* If the sensor is not in sleep mode put the device to sleep - mode */ - if ((rslt == BME280_OK) && (last_set_mode != BME280_SLEEP_MODE)) - rslt = put_device_to_sleep(dev); - /* Set the power mode */ - if (rslt == BME280_OK) - rslt = write_power_mode(sensor_mode, dev); - } - - return rslt; -} - -/*! - * @brief This API gets the power mode of the sensor. - */ -int8_t bme280_get_sensor_mode(uint8_t *sensor_mode, const struct bme280_dev *dev) -{ - int8_t rslt; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - - if (rslt == BME280_OK) { - /* Read the power mode register */ - rslt = bme280_get_regs(BME280_PWR_CTRL_ADDR, sensor_mode, 1, dev); - /* Assign the power mode in the device structure */ - *sensor_mode = BME280_GET_BITS_POS_0(*sensor_mode, BME280_SENSOR_MODE); - } - - return rslt; -} - -/*! - * @brief This API performs the soft reset of the sensor. - */ -int8_t bme280_soft_reset(const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_RESET_ADDR; - /* 0xB6 is the soft reset command */ - uint8_t soft_rst_cmd = 0xB6; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - /* Proceed if null check is fine */ - if (rslt == BME280_OK) { - /* Write the soft reset command in the sensor */ - rslt = bme280_set_regs(®_addr, &soft_rst_cmd, 1, dev); - /* As per data sheet, startup time is 2 ms. */ - dev->delay_ms(2); - } - - return rslt; -} - -/*! - * @brief This API reads the pressure, temperature and humidity data from the - * sensor, compensates the data and store it in the bme280_data structure - * instance passed by the user. - */ -int8_t bme280_get_sensor_data(uint8_t sensor_comp, struct bme280_data *comp_data, struct bme280_dev *dev) -{ - int8_t rslt; - /* Array to store the pressure, temperature and humidity data read from - the sensor */ - uint8_t reg_data[BME280_P_T_H_DATA_LEN] = {0}; - struct bme280_uncomp_data uncomp_data = {0}; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - - if ((rslt == BME280_OK) && (comp_data != NULL)) { - /* Read the pressure and temperature data from the sensor */ - rslt = bme280_get_regs(BME280_DATA_ADDR, reg_data, BME280_P_T_H_DATA_LEN, dev); - - if (rslt == BME280_OK) { - /* Parse the read data from the sensor */ - bme280_parse_sensor_data(reg_data, &uncomp_data); - /* Compensate the pressure and/or temperature and/or - humidity data from the sensor */ - rslt = bme280_compensate_data(sensor_comp, &uncomp_data, comp_data, &dev->calib_data); - } - } else { - rslt = BME280_E_NULL_PTR; - } - - return rslt; -} - -/*! - * @brief This API is used to parse the pressure, temperature and - * humidity data and store it in the bme280_uncomp_data structure instance. - */ -void bme280_parse_sensor_data(const uint8_t *reg_data, struct bme280_uncomp_data *uncomp_data) -{ - /* Variables to store the sensor data */ - uint32_t data_xlsb; - uint32_t data_lsb; - uint32_t data_msb; - - /* Store the parsed register values for pressure data */ - data_msb = (uint32_t)reg_data[0] << 12; - data_lsb = (uint32_t)reg_data[1] << 4; - data_xlsb = (uint32_t)reg_data[2] >> 4; - uncomp_data->pressure = data_msb | data_lsb | data_xlsb; - - /* Store the parsed register values for temperature data */ - data_msb = (uint32_t)reg_data[3] << 12; - data_lsb = (uint32_t)reg_data[4] << 4; - data_xlsb = (uint32_t)reg_data[5] >> 4; - uncomp_data->temperature = data_msb | data_lsb | data_xlsb; - - /* Store the parsed register values for temperature data */ - data_lsb = (uint32_t)reg_data[6] << 8; - data_msb = (uint32_t)reg_data[7]; - uncomp_data->humidity = data_msb | data_lsb; -} - - -/*! - * @brief This API is used to compensate the pressure and/or - * temperature and/or humidity data according to the component selected - * by the user. - */ -int8_t bme280_compensate_data(uint8_t sensor_comp, const struct bme280_uncomp_data *uncomp_data, - struct bme280_data *comp_data, struct bme280_calib_data *calib_data) -{ - int8_t rslt = BME280_OK; - - if ((uncomp_data != NULL) && (comp_data != NULL) && (calib_data != NULL)) { - /* Initialize to zero */ - comp_data->temperature = 0; - comp_data->pressure = 0; - comp_data->humidity = 0; - /* If pressure or temperature component is selected */ - if (sensor_comp & (BME280_PRESS | BME280_TEMP | BME280_HUM)) { - /* Compensate the temperature data */ - comp_data->temperature = compensate_temperature(uncomp_data, calib_data); - } - if (sensor_comp & BME280_PRESS) { - /* Compensate the pressure data */ - comp_data->pressure = compensate_pressure(uncomp_data, calib_data); - } - if (sensor_comp & BME280_HUM) { - /* Compensate the humidity data */ - comp_data->humidity = compensate_humidity(uncomp_data, calib_data); - } - } else { - rslt = BME280_E_NULL_PTR; - } - - return rslt; -} - -/*! - * @brief This internal API sets the oversampling settings for pressure, - * temperature and humidity in the sensor. - */ -static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_settings *settings, - const struct bme280_dev *dev) -{ - int8_t rslt = BME280_W_INVALID_OSR_MACRO; - - if (desired_settings & BME280_OSR_HUM_SEL) - rslt = set_osr_humidity_settings(settings, dev); - if (desired_settings & (BME280_OSR_PRESS_SEL | BME280_OSR_TEMP_SEL)) - rslt = set_osr_press_temp_settings(desired_settings, settings, dev); - - return rslt; -} - -/*! - * @brief This API sets the humidity oversampling settings of the sensor. - */ -static int8_t set_osr_humidity_settings(const struct bme280_settings *settings, const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t ctrl_hum; - uint8_t ctrl_meas; - uint8_t reg_addr = BME280_CTRL_HUM_ADDR; - - ctrl_hum = settings->osr_h & BME280_CTRL_HUM_MSK; - /* Write the humidity control value in the register */ - rslt = bme280_set_regs(®_addr, &ctrl_hum, 1, dev); - /* Humidity related changes will be only effective after a - write operation to ctrl_meas register */ - if (rslt == BME280_OK) { - reg_addr = BME280_CTRL_MEAS_ADDR; - rslt = bme280_get_regs(reg_addr, &ctrl_meas, 1, dev); - if (rslt == BME280_OK) - rslt = bme280_set_regs(®_addr, &ctrl_meas, 1, dev); - } - - return rslt; -} - -/*! - * @brief This API sets the pressure and/or temperature oversampling settings - * in the sensor according to the settings selected by the user. - */ -static int8_t set_osr_press_temp_settings(uint8_t desired_settings, const struct bme280_settings *settings, - const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_CTRL_MEAS_ADDR; - uint8_t reg_data; - - rslt = bme280_get_regs(reg_addr, ®_data, 1, dev); - - if (rslt == BME280_OK) { - if (desired_settings & BME280_OSR_PRESS_SEL) - fill_osr_press_settings(®_data, settings); - if (desired_settings & BME280_OSR_TEMP_SEL) - fill_osr_temp_settings(®_data, settings); - /* Write the oversampling settings in the register */ - rslt = bme280_set_regs(®_addr, ®_data, 1, dev); - } - - return rslt; -} - -/*! - * @brief This internal API sets the filter and/or standby duration settings - * in the sensor according to the settings selected by the user. - */ -static int8_t set_filter_standby_settings(uint8_t desired_settings, const struct bme280_settings *settings, - const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_CONFIG_ADDR; - uint8_t reg_data; - - rslt = bme280_get_regs(reg_addr, ®_data, 1, dev); - - if (rslt == BME280_OK) { - if (desired_settings & BME280_FILTER_SEL) - fill_filter_settings(®_data, settings); - if (desired_settings & BME280_STANDBY_SEL) - fill_standby_settings(®_data, settings); - /* Write the oversampling settings in the register */ - rslt = bme280_set_regs(®_addr, ®_data, 1, dev); - } - - return rslt; -} - -/*! - * @brief This internal API fills the filter settings provided by the user - * in the data buffer so as to write in the sensor. - */ -static void fill_filter_settings(uint8_t *reg_data, const struct bme280_settings *settings) -{ - *reg_data = BME280_SET_BITS(*reg_data, BME280_FILTER, settings->filter); -} - -/*! - * @brief This internal API fills the standby duration settings provided by - * the user in the data buffer so as to write in the sensor. - */ -static void fill_standby_settings(uint8_t *reg_data, const struct bme280_settings *settings) -{ - *reg_data = BME280_SET_BITS(*reg_data, BME280_STANDBY, settings->standby_time); -} - -/*! - * @brief This internal API fills the pressure oversampling settings provided by - * the user in the data buffer so as to write in the sensor. - */ -static void fill_osr_press_settings(uint8_t *reg_data, const struct bme280_settings *settings) -{ - *reg_data = BME280_SET_BITS(*reg_data, BME280_CTRL_PRESS, settings->osr_p); -} - -/*! - * @brief This internal API fills the temperature oversampling settings - * provided by the user in the data buffer so as to write in the sensor. - */ -static void fill_osr_temp_settings(uint8_t *reg_data, const struct bme280_settings *settings) -{ - *reg_data = BME280_SET_BITS(*reg_data, BME280_CTRL_TEMP, settings->osr_t); -} - -/*! - * @brief This internal API parse the oversampling(pressure, temperature - * and humidity), filter and standby duration settings and store in the - * device structure. - */ -static void parse_device_settings(const uint8_t *reg_data, struct bme280_settings *settings) -{ - settings->osr_h = BME280_GET_BITS_POS_0(reg_data[0], BME280_CTRL_HUM); - settings->osr_p = BME280_GET_BITS(reg_data[2], BME280_CTRL_PRESS); - settings->osr_t = BME280_GET_BITS(reg_data[2], BME280_CTRL_TEMP); - settings->filter = BME280_GET_BITS(reg_data[3], BME280_FILTER); - settings->standby_time = BME280_GET_BITS(reg_data[3], BME280_STANDBY); -} -/*! - * @brief This internal API writes the power mode in the sensor. - */ -static int8_t write_power_mode(uint8_t sensor_mode, const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_PWR_CTRL_ADDR; - /* Variable to store the value read from power mode register */ - uint8_t sensor_mode_reg_val; - - /* Read the power mode register */ - rslt = bme280_get_regs(reg_addr, &sensor_mode_reg_val, 1, dev); - /* Set the power mode */ - if (rslt == BME280_OK) { - sensor_mode_reg_val = BME280_SET_BITS_POS_0(sensor_mode_reg_val, BME280_SENSOR_MODE, sensor_mode); - /* Write the power mode in the register */ - rslt = bme280_set_regs(®_addr, &sensor_mode_reg_val, 1, dev); - } - - return rslt; -} - -/*! - * @brief This internal API puts the device to sleep mode. - */ -static int8_t put_device_to_sleep(const struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_data[4]; - struct bme280_settings settings; - - rslt = bme280_get_regs(BME280_CTRL_HUM_ADDR, reg_data, 4, dev); - if (rslt == BME280_OK) { - parse_device_settings(reg_data, &settings); - rslt = bme280_soft_reset(dev); - if (rslt == BME280_OK) - rslt = reload_device_settings(&settings, dev); - } - - return rslt; -} - -/*! - * @brief This internal API reloads the already existing device settings in - * the sensor after soft reset. - */ -static int8_t reload_device_settings(const struct bme280_settings *settings, const struct bme280_dev *dev) -{ - int8_t rslt; - - rslt = set_osr_settings(BME280_ALL_SETTINGS_SEL, settings, dev); - if (rslt == BME280_OK) - rslt = set_filter_standby_settings(BME280_ALL_SETTINGS_SEL, settings, dev); - - return rslt; -} - -#ifdef BME280_FLOAT_ENABLE -/*! - * @brief This internal API is used to compensate the raw temperature data and - * return the compensated temperature data in double data type. - */ -static double compensate_temperature(const struct bme280_uncomp_data *uncomp_data, - struct bme280_calib_data *calib_data) -{ - double var1; - double var2; - double temperature; - double temperature_min = -40; - double temperature_max = 85; - - var1 = ((double)uncomp_data->temperature) / 16384.0 - ((double)calib_data->dig_T1) / 1024.0; - var1 = var1 * ((double)calib_data->dig_T2); - var2 = (((double)uncomp_data->temperature) / 131072.0 - ((double)calib_data->dig_T1) / 8192.0); - var2 = (var2 * var2) * ((double)calib_data->dig_T3); - calib_data->t_fine = (int32_t)(var1 + var2); - temperature = (var1 + var2) / 5120.0; - - if (temperature < temperature_min) - temperature = temperature_min; - else if (temperature > temperature_max) - temperature = temperature_max; - - return temperature; -} - -/*! - * @brief This internal API is used to compensate the raw pressure data and - * return the compensated pressure data in double data type. - */ -static double compensate_pressure(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data) -{ - double var1; - double var2; - double var3; - double pressure; - double pressure_min = 30000.0; - double pressure_max = 110000.0; - - var1 = ((double)calib_data->t_fine / 2.0) - 64000.0; - var2 = var1 * var1 * ((double)calib_data->dig_P6) / 32768.0; - var2 = var2 + var1 * ((double)calib_data->dig_P5) * 2.0; - var2 = (var2 / 4.0) + (((double)calib_data->dig_P4) * 65536.0); - var3 = ((double)calib_data->dig_P3) * var1 * var1 / 524288.0; - var1 = (var3 + ((double)calib_data->dig_P2) * var1) / 524288.0; - var1 = (1.0 + var1 / 32768.0) * ((double)calib_data->dig_P1); - /* avoid exception caused by division by zero */ - if (var1) { - pressure = 1048576.0 - (double) uncomp_data->pressure; - pressure = (pressure - (var2 / 4096.0)) * 6250.0 / var1; - var1 = ((double)calib_data->dig_P9) * pressure * pressure / 2147483648.0; - var2 = pressure * ((double)calib_data->dig_P8) / 32768.0; - pressure = pressure + (var1 + var2 + ((double)calib_data->dig_P7)) / 16.0; - - if (pressure < pressure_min) - pressure = pressure_min; - else if (pressure > pressure_max) - pressure = pressure_max; - } else { /* Invalid case */ - pressure = pressure_min; - } - - return pressure; -} - -/*! - * @brief This internal API is used to compensate the raw humidity data and - * return the compensated humidity data in double data type. - */ -static double compensate_humidity(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data) -{ - double humidity; - double humidity_min = 0.0; - double humidity_max = 100.0; - double var1; - double var2; - double var3; - double var4; - double var5; - double var6; - - var1 = ((double)calib_data->t_fine) - 76800.0; - var2 = (((double)calib_data->dig_H4) * 64.0 + (((double)calib_data->dig_H5) / 16384.0) * var1); - var3 = uncomp_data->humidity - var2; - var4 = ((double)calib_data->dig_H2) / 65536.0; - var5 = (1.0 + (((double)calib_data->dig_H3) / 67108864.0) * var1); - var6 = 1.0 + (((double)calib_data->dig_H6) / 67108864.0) * var1 * var5; - var6 = var3 * var4 * (var5 * var6); - humidity = var6 * (1.0 - ((double)calib_data->dig_H1) * var6 / 524288.0); - - if (humidity > humidity_max) - humidity = humidity_max; - else if (humidity < humidity_min) - humidity = humidity_min; - - return humidity; -} - -#else -/*! - * @brief This internal API is used to compensate the raw temperature data and - * return the compensated temperature data in integer data type. - */ -static int32_t compensate_temperature(const struct bme280_uncomp_data *uncomp_data, - struct bme280_calib_data *calib_data) -{ - int32_t var1; - int32_t var2; - int32_t temperature; - int32_t temperature_min = -4000; - int32_t temperature_max = 8500; - - var1 = (int32_t)((uncomp_data->temperature / 8) - ((int32_t)calib_data->dig_T1 * 2)); - var1 = (var1 * ((int32_t)calib_data->dig_T2)) / 2048; - var2 = (int32_t)((uncomp_data->temperature / 16) - ((int32_t)calib_data->dig_T1)); - var2 = (((var2 * var2) / 4096) * ((int32_t)calib_data->dig_T3)) / 16384; - calib_data->t_fine = var1 + var2; - temperature = (calib_data->t_fine * 5 + 128) / 256; - - if (temperature < temperature_min) - temperature = temperature_min; - else if (temperature > temperature_max) - temperature = temperature_max; - - return temperature; -} -#ifdef BME280_64BIT_ENABLE -/*! - * @brief This internal API is used to compensate the raw pressure data and - * return the compensated pressure data in integer data type with higher - * accuracy. - */ -static uint32_t compensate_pressure(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data) -{ - int64_t var1; - int64_t var2; - int64_t var3; - int64_t var4; - uint32_t pressure; - uint32_t pressure_min = 3000000; - uint32_t pressure_max = 11000000; - - var1 = ((int64_t)calib_data->t_fine) - 128000; - var2 = var1 * var1 * (int64_t)calib_data->dig_P6; - var2 = var2 + ((var1 * (int64_t)calib_data->dig_P5) * 131072); - var2 = var2 + (((int64_t)calib_data->dig_P4) * 34359738368); - var1 = ((var1 * var1 * (int64_t)calib_data->dig_P3) / 256) + ((var1 * ((int64_t)calib_data->dig_P2) * 4096)); - var3 = ((int64_t)1) * 140737488355328; - var1 = (var3 + var1) * ((int64_t)calib_data->dig_P1) / 8589934592; - - /* To avoid divide by zero exception */ - if (var1 != 0) { - var4 = 1048576 - uncomp_data->pressure; - var4 = (((var4 * 2147483648) - var2) * 3125) / var1; - var1 = (((int64_t)calib_data->dig_P9) * (var4 / 8192) * (var4 / 8192)) / 33554432; - var2 = (((int64_t)calib_data->dig_P8) * var4) / 524288; - var4 = ((var4 + var1 + var2) / 256) + (((int64_t)calib_data->dig_P7) * 16); - pressure = (uint32_t)(((var4 / 2) * 100) / 128); - - if (pressure < pressure_min) - pressure = pressure_min; - else if (pressure > pressure_max) - pressure = pressure_max; - } else { - pressure = pressure_min; - } - - return pressure; -} -#else -/*! - * @brief This internal API is used to compensate the raw pressure data and - * return the compensated pressure data in integer data type. - */ -static uint32_t compensate_pressure(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data) -{ - int32_t var1; - int32_t var2; - int32_t var3; - int32_t var4; - uint32_t var5; - uint32_t pressure; - uint32_t pressure_min = 30000; - uint32_t pressure_max = 110000; - - var1 = (((int32_t)calib_data->t_fine) / 2) - (int32_t)64000; - var2 = (((var1 / 4) * (var1 / 4)) / 2048) * ((int32_t)calib_data->dig_P6); - var2 = var2 + ((var1 * ((int32_t)calib_data->dig_P5)) * 2); - var2 = (var2 / 4) + (((int32_t)calib_data->dig_P4) * 65536); - var3 = (calib_data->dig_P3 * (((var1 / 4) * (var1 / 4)) / 8192)) / 8; - var4 = (((int32_t)calib_data->dig_P2) * var1) / 2; - var1 = (var3 + var4) / 262144; - var1 = (((32768 + var1)) * ((int32_t)calib_data->dig_P1)) / 32768; - /* avoid exception caused by division by zero */ - if (var1) { - var5 = (uint32_t)((uint32_t)1048576) - uncomp_data->pressure; - pressure = ((uint32_t)(var5 - (uint32_t)(var2 / 4096))) * 3125; - if (pressure < 0x80000000) - pressure = (pressure << 1) / ((uint32_t)var1); - else - pressure = (pressure / (uint32_t)var1) * 2; - - var1 = (((int32_t)calib_data->dig_P9) * ((int32_t)(((pressure / 8) * (pressure / 8)) / 8192))) / 4096; - var2 = (((int32_t)(pressure / 4)) * ((int32_t)calib_data->dig_P8)) / 8192; - pressure = (uint32_t)((int32_t)pressure + ((var1 + var2 + calib_data->dig_P7) / 16)); - - if (pressure < pressure_min) - pressure = pressure_min; - else if (pressure > pressure_max) - pressure = pressure_max; - } else { - pressure = pressure_min; - } - - return pressure; -} -#endif - -/*! - * @brief This internal API is used to compensate the raw humidity data and - * return the compensated humidity data in integer data type. - */ -static uint32_t compensate_humidity(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data) -{ - int32_t var1; - int32_t var2; - int32_t var3; - int32_t var4; - int32_t var5; - uint32_t humidity; - uint32_t humidity_max = 102400; - - var1 = calib_data->t_fine - ((int32_t)76800); - var2 = (int32_t)(uncomp_data->humidity * 16384); - var3 = (int32_t)(((int32_t)calib_data->dig_H4) * 1048576); - var4 = ((int32_t)calib_data->dig_H5) * var1; - var5 = (((var2 - var3) - var4) + (int32_t)16384) / 32768; - var2 = (var1 * ((int32_t)calib_data->dig_H6)) / 1024; - var3 = (var1 * ((int32_t)calib_data->dig_H3)) / 2048; - var4 = ((var2 * (var3 + (int32_t)32768)) / 1024) + (int32_t)2097152; - var2 = ((var4 * ((int32_t)calib_data->dig_H2)) + 8192) / 16384; - var3 = var5 * var2; - var4 = ((var3 / 32768) * (var3 / 32768)) / 128; - var5 = var3 - ((var4 * ((int32_t)calib_data->dig_H1)) / 16); - var5 = (var5 < 0 ? 0 : var5); - var5 = (var5 > 419430400 ? 419430400 : var5); - humidity = (uint32_t)(var5 / 4096); - - if (humidity > humidity_max) - humidity = humidity_max; - - return humidity; -} -#endif - -/*! - * @brief This internal API reads the calibration data from the sensor, parse - * it and store in the device structure. - */ -static int8_t get_calib_data(struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_TEMP_PRESS_CALIB_DATA_ADDR; - /* Array to store calibration data */ - uint8_t calib_data[BME280_TEMP_PRESS_CALIB_DATA_LEN] = {0}; - - /* Read the calibration data from the sensor */ - rslt = bme280_get_regs(reg_addr, calib_data, BME280_TEMP_PRESS_CALIB_DATA_LEN, dev); - - if (rslt == BME280_OK) { - /* Parse temperature and pressure calibration data and store - it in device structure */ - parse_temp_press_calib_data(calib_data, dev); - - reg_addr = BME280_HUMIDITY_CALIB_DATA_ADDR; - /* Read the humidity calibration data from the sensor */ - rslt = bme280_get_regs(reg_addr, calib_data, BME280_HUMIDITY_CALIB_DATA_LEN, dev); - if (rslt == BME280_OK) { - /* Parse humidity calibration data and store it in - device structure */ - parse_humidity_calib_data(calib_data, dev); - } - } - - return rslt; -} - -/*! - * @brief This internal API interleaves the register address between the - * register data buffer for burst write operation. - */ -static void interleave_reg_addr(const uint8_t *reg_addr, uint8_t *temp_buff, const uint8_t *reg_data, uint8_t len) -{ - uint8_t index; - - for (index = 1; index < len; index++) { - temp_buff[(index * 2) - 1] = reg_addr[index]; - temp_buff[index * 2] = reg_data[index]; - } -} - -/*! - * @brief This internal API is used to parse the temperature and - * pressure calibration data and store it in device structure. - */ -static void parse_temp_press_calib_data(const uint8_t *reg_data, struct bme280_dev *dev) -{ - struct bme280_calib_data *calib_data = &dev->calib_data; - - calib_data->dig_T1 = BME280_CONCAT_BYTES(reg_data[1], reg_data[0]); - calib_data->dig_T2 = (int16_t)BME280_CONCAT_BYTES(reg_data[3], reg_data[2]); - calib_data->dig_T3 = (int16_t)BME280_CONCAT_BYTES(reg_data[5], reg_data[4]); - calib_data->dig_P1 = BME280_CONCAT_BYTES(reg_data[7], reg_data[6]); - calib_data->dig_P2 = (int16_t)BME280_CONCAT_BYTES(reg_data[9], reg_data[8]); - calib_data->dig_P3 = (int16_t)BME280_CONCAT_BYTES(reg_data[11], reg_data[10]); - calib_data->dig_P4 = (int16_t)BME280_CONCAT_BYTES(reg_data[13], reg_data[12]); - calib_data->dig_P5 = (int16_t)BME280_CONCAT_BYTES(reg_data[15], reg_data[14]); - calib_data->dig_P6 = (int16_t)BME280_CONCAT_BYTES(reg_data[17], reg_data[16]); - calib_data->dig_P7 = (int16_t)BME280_CONCAT_BYTES(reg_data[19], reg_data[18]); - calib_data->dig_P8 = (int16_t)BME280_CONCAT_BYTES(reg_data[21], reg_data[20]); - calib_data->dig_P9 = (int16_t)BME280_CONCAT_BYTES(reg_data[23], reg_data[22]); - calib_data->dig_H1 = reg_data[25]; - -} - -/*! - * @brief This internal API is used to parse the humidity calibration data - * and store it in device structure. - */ -static void parse_humidity_calib_data(const uint8_t *reg_data, struct bme280_dev *dev) -{ - struct bme280_calib_data *calib_data = &dev->calib_data; - int16_t dig_H4_lsb; - int16_t dig_H4_msb; - int16_t dig_H5_lsb; - int16_t dig_H5_msb; - - calib_data->dig_H2 = (int16_t)BME280_CONCAT_BYTES(reg_data[1], reg_data[0]); - calib_data->dig_H3 = reg_data[2]; - - dig_H4_msb = (int16_t)(int8_t)reg_data[3] * 16; - dig_H4_lsb = (int16_t)(reg_data[4] & 0x0F); - calib_data->dig_H4 = dig_H4_msb | dig_H4_lsb; - - dig_H5_msb = (int16_t)(int8_t)reg_data[5] * 16; - dig_H5_lsb = (int16_t)(reg_data[4] >> 4); - calib_data->dig_H5 = dig_H5_msb | dig_H5_lsb; - calib_data->dig_H6 = (int8_t)reg_data[6]; -} - -/*! - * @brief This internal API is used to identify the settings which the user - * wants to modify in the sensor. - */ -static uint8_t are_settings_changed(uint8_t sub_settings, uint8_t desired_settings) -{ - uint8_t settings_changed = FALSE; - - if (sub_settings & desired_settings) { - /* User wants to modify this particular settings */ - settings_changed = TRUE; - } else { - /* User don't want to modify this particular settings */ - settings_changed = FALSE; - } - - return settings_changed; -} - -/*! - * @brief This internal API is used to validate the device structure pointer for - * null conditions. - */ -static int8_t null_ptr_check(const struct bme280_dev *dev) -{ - int8_t rslt; - - if ((dev == NULL) || (dev->read == NULL) || (dev->write == NULL) || (dev->delay_ms == NULL)) { - /* Device structure pointer is not valid */ - rslt = BME280_E_NULL_PTR; - } else { - /* Device structure is fine */ - rslt = BME280_OK; - } - - return rslt; -} diff --git a/src/bme280/bme280.h b/src/bme280/bme280.h deleted file mode 100644 index d7401ad..0000000 --- a/src/bme280/bme280.h +++ /dev/null @@ -1,240 +0,0 @@ -/** - * Copyright (C) 2016 - 2017 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 bme280.h - * @date 14 Feb 2018 - * @version 3.3.4 - * @brief - * - */ -/*! @file bme280.h - @brief Sensor driver for BME280 sensor */ -/*! - * @defgroup BME280 SENSOR API - * @{*/ -#ifndef BME280_H_ -#define BME280_H_ - -/*! CPP guard */ -#ifdef __cplusplus -extern "C" { -#endif - -/* Header includes */ -#include "bme280_defs.h" - -/*! - * @brief This API is the entry point. - * It reads the chip-id and calibration data from the sensor. - * - * @param[in,out] dev : Structure instance of bme280_dev - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -int8_t bme280_init(struct bme280_dev *dev); - -/*! - * @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.. - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -int8_t bme280_set_regs(uint8_t *reg_addr, const uint8_t *reg_data, uint8_t len, const struct bme280_dev *dev); - -/*! - * @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. - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -int8_t bme280_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint16_t len, const struct bme280_dev *dev); - -/*! - * @brief This API sets the oversampling, filter and standby duration - * (normal mode) settings in the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[in] desired_settings : Variable used to select the settings which - * are to be set in the sensor. - * - * @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. - * - * Macros | Functionality - * -----------------------|---------------------------------------------- - * BME280_OSR_PRESS_SEL | To set pressure oversampling. - * BME280_OSR_TEMP_SEL | To set temperature oversampling. - * BME280_OSR_HUM_SEL | To set humidity oversampling. - * BME280_FILTER_SEL | To set filter setting. - * BME280_STANDBY_SEL | To set standby duration setting. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error. - */ -int8_t bme280_set_sensor_settings(uint8_t desired_settings, const struct bme280_dev *dev); - -/*! - * @brief This API gets the oversampling, filter and standby duration - * (normal mode) settings from the sensor. - * - * @param[in,out] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error. - */ -int8_t bme280_get_sensor_settings(struct bme280_dev *dev); - -/*! - * @brief This API sets the power mode of the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[in] sensor_mode : Variable which contains the power mode to be set. - * - * sensor_mode | Macros - * ---------------------|------------------- - * 0 | BME280_SLEEP_MODE - * 1 | BME280_FORCED_MODE - * 3 | BME280_NORMAL_MODE - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -int8_t bme280_set_sensor_mode(uint8_t sensor_mode, - const struct bme280_dev *dev); - -/*! - * @brief This API gets the power mode of the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * @param[out] sensor_mode : Pointer variable to store the power mode. - * - * sensor_mode | Macros - * ---------------------|------------------- - * 0 | BME280_SLEEP_MODE - * 1 | BME280_FORCED_MODE - * 3 | BME280_NORMAL_MODE - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -int8_t bme280_get_sensor_mode(uint8_t *sensor_mode, const struct bme280_dev *dev); - -/*! - * @brief This API performs the soft reset of the sensor. - * - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error. - */ -int8_t bme280_soft_reset(const struct bme280_dev *dev); - -/*! - * @brief This API reads the pressure, temperature and humidity data from the - * sensor, compensates the data and store it in the bme280_data structure - * instance passed by the user. - * - * @param[in] sensor_comp : Variable which selects which data to be read from - * the sensor. - * - * sensor_comp | Macros - * ------------|------------------- - * 1 | BME280_PRESS - * 2 | BME280_TEMP - * 4 | BME280_HUM - * 7 | BME280_ALL - * - * @param[out] comp_data : Structure instance of bme280_data. - * @param[in] dev : Structure instance of bme280_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -int8_t bme280_get_sensor_data(uint8_t sensor_comp, struct bme280_data *comp_data, struct bme280_dev *dev); - -/*! - * @brief This API is used to parse the pressure, temperature and - * humidity data and store it in the bme280_uncomp_data structure instance. - * - * @param[in] reg_data : Contains register data which needs to be parsed - * @param[out] uncomp_data : Contains the uncompensated pressure, temperature - * and humidity data. - */ -void bme280_parse_sensor_data(const uint8_t *reg_data, struct bme280_uncomp_data *uncomp_data); - -/*! - * @brief This API is used to compensate the pressure and/or - * temperature and/or humidity data according to the component selected by the - * user. - * - * @param[in] sensor_comp : Used to select pressure and/or temperature and/or - * humidity. - * @param[in] uncomp_data : Contains the uncompensated pressure, temperature and - * humidity data. - * @param[out] comp_data : Contains the compensated pressure and/or temperature - * and/or humidity data. - * @param[in] calib_data : Pointer to the calibration data structure. - * - * @return Result of API execution status. - * @retval zero -> Success / -ve value -> Error - */ -int8_t bme280_compensate_data(uint8_t sensor_comp, const struct bme280_uncomp_data *uncomp_data, - struct bme280_data *comp_data, struct bme280_calib_data *calib_data); - -#ifdef __cplusplus -} -#endif /* End of CPP guard */ -#endif /* BME280_H_ */ -/** @}*/ diff --git a/src/bme280/bme280_defs.h b/src/bme280/bme280_defs.h deleted file mode 100644 index 79fbdd1..0000000 --- a/src/bme280/bme280_defs.h +++ /dev/null @@ -1,373 +0,0 @@ -/** - * Copyright (C) 2016 - 2017 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 bme280_defs.h - * @date 14 Feb 2018 - * @version 3.3.4 - * @brief - * - */ - -/*! @file bme280_defs.h - @brief Sensor driver for BME280 sensor */ -/*! - * @defgroup BME280 SENSOR API - * @brief - * @{*/ -#ifndef BME280_DEFS_H_ -#define BME280_DEFS_H_ - -/********************************************************/ -/* header includes */ -#ifdef __KERNEL__ -#include -#include -#else -#include -#include -#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 -/********************************************************/ - -#ifndef BME280_FLOAT_ENABLE -/* -默认采用整形，取消该注释代表采用浮点类型 -Integer is used by default, uncommenting this means using floating-point type -*/ -#define BME280_FLOAT_ENABLE -#endif - - -#ifndef BME280_FLOAT_ENABLE - -#ifndef BME280_64BIT_ENABLE -/* -采用32位系统，取消该注释代表采用64位系统 -Using a 32-bit system, uncommenting this means using a 64-bit system -*/ -/*#define BME280_64BIT_ENABLE*/ -#endif - -#endif - -#ifndef TRUE -#define TRUE UINT8_C(1) -#endif -#ifndef FALSE -#define FALSE UINT8_C(0) -#endif - -/**\name I2C addresses */ -#define BME280_I2C_ADDR_PRIM UINT8_C(0x76) -#define BME280_I2C_ADDR_SEC UINT8_C(0x77) - -/**\name BME280 chip identifier */ -#define BME280_CHIP_ID UINT8_C(0x60) - -/**\name Register Address */ -#define BME280_CHIP_ID_ADDR UINT8_C(0xD0) -#define BME280_RESET_ADDR UINT8_C(0xE0) -#define BME280_TEMP_PRESS_CALIB_DATA_ADDR UINT8_C(0x88) -#define BME280_HUMIDITY_CALIB_DATA_ADDR UINT8_C(0xE1) -#define BME280_PWR_CTRL_ADDR UINT8_C(0xF4) -#define BME280_CTRL_HUM_ADDR UINT8_C(0xF2) -#define BME280_CTRL_MEAS_ADDR UINT8_C(0xF4) -#define BME280_CONFIG_ADDR UINT8_C(0xF5) -#define BME280_DATA_ADDR UINT8_C(0xF7) - -/**\name API success code */ -#define BME280_OK INT8_C(0) - -/**\name API error codes */ -#define BME280_E_NULL_PTR INT8_C(-1) -#define BME280_E_DEV_NOT_FOUND INT8_C(-2) -#define BME280_E_INVALID_LEN INT8_C(-3) -#define BME280_E_COMM_FAIL INT8_C(-4) -#define BME280_E_SLEEP_MODE_FAIL INT8_C(-5) - -/**\name API warning codes */ -#define BME280_W_INVALID_OSR_MACRO INT8_C(1) - -/**\name Macros related to size */ -#define BME280_TEMP_PRESS_CALIB_DATA_LEN UINT8_C(26) -#define BME280_HUMIDITY_CALIB_DATA_LEN UINT8_C(7) -#define BME280_P_T_H_DATA_LEN UINT8_C(8) - -/**\name Sensor power modes */ -#define BME280_SLEEP_MODE UINT8_C(0x00) -#define BME280_FORCED_MODE UINT8_C(0x01) -#define BME280_NORMAL_MODE UINT8_C(0x03) - -/**\name Macro to combine two 8 bit data's to form a 16 bit data */ -#define BME280_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb) - -#define BME280_SET_BITS(reg_data, bitname, data) \ - ((reg_data & ~(bitname##_MSK)) | \ - ((data << bitname##_POS) & bitname##_MSK)) -#define BME280_SET_BITS_POS_0(reg_data, bitname, data) \ - ((reg_data & ~(bitname##_MSK)) | \ - (data & bitname##_MSK)) - -#define BME280_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \ - (bitname##_POS)) -#define BME280_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK)) - -/**\name Macros for bit masking */ -#define BME280_SENSOR_MODE_MSK UINT8_C(0x03) -#define BME280_SENSOR_MODE_POS UINT8_C(0x00) - -#define BME280_CTRL_HUM_MSK UINT8_C(0x07) -#define BME280_CTRL_HUM_POS UINT8_C(0x00) - -#define BME280_CTRL_PRESS_MSK UINT8_C(0x1C) -#define BME280_CTRL_PRESS_POS UINT8_C(0x02) - -#define BME280_CTRL_TEMP_MSK UINT8_C(0xE0) -#define BME280_CTRL_TEMP_POS UINT8_C(0x05) - -#define BME280_FILTER_MSK UINT8_C(0x1C) -#define BME280_FILTER_POS UINT8_C(0x02) - -#define BME280_STANDBY_MSK UINT8_C(0xE0) -#define BME280_STANDBY_POS UINT8_C(0x05) - -/**\name Sensor component selection macros - These values are internal for API implementation. Don't relate this to - data sheet.*/ -#define BME280_PRESS UINT8_C(1) -#define BME280_TEMP UINT8_C(1 << 1) -#define BME280_HUM UINT8_C(1 << 2) -#define BME280_ALL UINT8_C(0x07) - -/**\name Settings selection macros */ -#define BME280_OSR_PRESS_SEL UINT8_C(1) -#define BME280_OSR_TEMP_SEL UINT8_C(1 << 1) -#define BME280_OSR_HUM_SEL UINT8_C(1 << 2) -#define BME280_FILTER_SEL UINT8_C(1 << 3) -#define BME280_STANDBY_SEL UINT8_C(1 << 4) -#define BME280_ALL_SETTINGS_SEL UINT8_C(0x1F) - -/**\name Oversampling macros */ -#define BME280_NO_OVERSAMPLING UINT8_C(0x00) -#define BME280_OVERSAMPLING_1X UINT8_C(0x01) -#define BME280_OVERSAMPLING_2X UINT8_C(0x02) -#define BME280_OVERSAMPLING_4X UINT8_C(0x03) -#define BME280_OVERSAMPLING_8X UINT8_C(0x04) -#define BME280_OVERSAMPLING_16X UINT8_C(0x05) - -/**\name Standby duration selection macros */ -#define BME280_STANDBY_TIME_1_MS (0x00) -#define BME280_STANDBY_TIME_62_5_MS (0x01) -#define BME280_STANDBY_TIME_125_MS (0x02) -#define BME280_STANDBY_TIME_250_MS (0x03) -#define BME280_STANDBY_TIME_500_MS (0x04) -#define BME280_STANDBY_TIME_1000_MS (0x05) -#define BME280_STANDBY_TIME_10_MS (0x06) -#define BME280_STANDBY_TIME_20_MS (0x07) - -/**\name Filter coefficient selection macros */ -#define BME280_FILTER_COEFF_OFF (0x00) -#define BME280_FILTER_COEFF_2 (0x01) -#define BME280_FILTER_COEFF_4 (0x02) -#define BME280_FILTER_COEFF_8 (0x03) -#define BME280_FILTER_COEFF_16 (0x04) - -/*! - * @brief Interface selection Enums - */ -enum bme280_intf { - /*! SPI interface */ - BME280_SPI_INTF, - /*! I2C interface */ - BME280_I2C_INTF -}; - -/*! - * @brief Type definitions - */ -typedef int8_t (*bme280_com_fptr_t)(uint8_t dev_id, uint8_t reg_addr, - uint8_t *data, uint16_t len); - -typedef void (*bme280_delay_fptr_t)(uint32_t period); - -/*! - * @brief Calibration data - */ -struct bme280_calib_data { - /** - * @ Trim Variables - */ -/**@{*/ - uint16_t dig_T1; - int16_t dig_T2; - int16_t dig_T3; - uint16_t dig_P1; - int16_t dig_P2; - int16_t dig_P3; - int16_t dig_P4; - int16_t dig_P5; - int16_t dig_P6; - int16_t dig_P7; - int16_t dig_P8; - int16_t dig_P9; - uint8_t dig_H1; - int16_t dig_H2; - uint8_t dig_H3; - int16_t dig_H4; - int16_t dig_H5; - int8_t dig_H6; - int32_t t_fine; -/**@}*/ -}; - -/*! - * @brief bme280 sensor structure which comprises of temperature, pressure and - * humidity data - */ -#ifdef BME280_FLOAT_ENABLE -struct bme280_data { - /*! Compensated pressure */ - double pressure; - /*! Compensated temperature */ - double temperature; - /*! Compensated humidity */ - double humidity; -}; -#else -struct bme280_data { - /*! Compensated pressure */ - uint32_t pressure; - /*! Compensated temperature */ - int32_t temperature; - /*! Compensated humidity */ - uint32_t humidity; -}; -#endif /* BME280_USE_FLOATING_POINT */ - -/*! - * @brief bme280 sensor structure which comprises of uncompensated temperature, - * pressure and humidity data - */ -struct bme280_uncomp_data { - /*! un-compensated pressure */ - uint32_t pressure; - /*! un-compensated temperature */ - uint32_t temperature; - /*! un-compensated humidity */ - uint32_t humidity; -}; - -/*! - * @brief bme280 sensor settings structure which comprises of mode, - * oversampling and filter settings. - */ -struct bme280_settings { - /*! pressure oversampling */ - uint8_t osr_p; - /*! temperature oversampling */ - uint8_t osr_t; - /*! humidity oversampling */ - uint8_t osr_h; - /*! filter coefficient */ - uint8_t filter; - /*! standby time */ - uint8_t standby_time; -}; - -/*! - * @brief bme280 device structure - */ -struct bme280_dev { - /*! Chip Id */ - uint8_t chip_id; - /*! Device Id */ - uint8_t dev_id; - /*! SPI/I2C interface */ - enum bme280_intf intf; - /*! Read function pointer */ - bme280_com_fptr_t read; - /*! Write function pointer */ - bme280_com_fptr_t write; - /*! Delay function pointer */ - bme280_delay_fptr_t delay_ms; - /*! Trim data */ - struct bme280_calib_data calib_data; - /*! Sensor settings */ - struct bme280_settings settings; -}; - -#endif /* BME280_DEFS_H_ */ -/** @}*/ -/** @}*/ diff --git a/src/jsontest.c b/src/jsontest.c deleted file mode 100644 index 46642f1..0000000 --- a/src/jsontest.c +++ /dev/null @@ -1,100 +0,0 @@ -/** - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -int8_t check_file_exists(const char *filename) -{ - FILE *file; - file = fopen(filename, "r"); - if (file != NULL) - { - fclose(file); - return 1; - } - - return 0; -} - -int main(int argc, char* argv[]) -{ - time_t rawtime = time(NULL); - struct tm *timeinfo; - char dateString[32]; - char timeString[32]; - char filename[100]; - char jsonBuffer[1024]; - //char jsonStrOutput[4096]; - FILE *jsonFilePtr; - - struct json_object *parsed_json; - struct json_object *latest_reading_object = json_object_new_object(); - struct json_object *temperature_object = json_object_new_object(); - //struct json_object *pressure_object = json_object_new_object(); - - timeinfo = localtime(&rawtime); - strftime(dateString, 32, "%F", timeinfo); - strftime(timeString, 32, "%F_%H-%M-%S", timeinfo); - - snprintf(filename, sizeof(filename), "readings_%s.json", dateString); - - if (!check_file_exists(filename)) - { - printf("File for today does not exist! Creating...\n"); - FILE *jsonFile = fopen(filename, "w"); - fputs("{}", jsonFile); - fclose(jsonFile); - } - - jsonFilePtr = fopen(filename, "r"); - if (jsonFilePtr == NULL) - { - printf("Failed to open %s for reading...\n", filename); - exit(1); - } - fread(jsonBuffer, 1024, 1, jsonFilePtr); - fclose(jsonFilePtr); - printf("raw json read in: %s\n", jsonBuffer); - - parsed_json = json_tokener_parse(jsonBuffer); - printf("json read in: %s\n", json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY)); - - double fahrenheit = (23 * 1.8) + 32; - double humidity = 100 - 80.82; - - json_object_object_add(temperature_object, "fahrenheit", json_object_new_double(fahrenheit)); - - json_object_object_add(latest_reading_object, "temperature", temperature_object); - json_object_object_add(latest_reading_object, "humidity_percent", json_object_new_double(humidity)); - - json_object_object_add(parsed_json, timeString, latest_reading_object); - - printf("json to write out: %s\n", json_object_to_json_string_ext(latest_reading_object, JSON_C_TO_STRING_PRETTY)); - printf("new json to write out: %s\n", json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY)); - - //uint32_t jsonStrSize = sizeof(json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY)); - //printf("jsonStrSize %i\n", jsonStrSize); - //char jsonStrOutput[] = json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY); - - jsonFilePtr = fopen(filename, "w"); - if (jsonFilePtr == NULL) - { - printf("Failed to open %s for writing...\n", filename); - exit(1); - } - fputs(json_object_to_json_string_ext(parsed_json, JSON_C_TO_STRING_PRETTY), jsonFilePtr); - //fwrite(json_object_to_json_string_ext(parsed_json), 1, jsonStrSize, jsonFilePtr); - fclose(jsonFilePtr); - - return 0; -} diff --git a/src/main.c b/src/main.c deleted file mode 100644 index 58f8ee8..0000000 --- a/src/main.c +++ /dev/null @@ -1,183 +0,0 @@ -/** - * - */ - - -#include "bme280/bme280.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define IIC_Dev "/dev/i2c-1" - -int file_descriptor; // maybe file descriptor? example had it as 'fd' - -int8_t check_file_exists(const char *filename) -{ - FILE *file; - file = fopen(filename, "r"); - if (file != NULL) - { - fclose(file); - return 1; - } - - return 0; -} - -void user_delay_ms(uint32_t period) -{ - usleep(period*1000); -} - -double celsius_to_fahrenheit(double celsius) -{ - return (celsius * 1.8) + 32; -} - -double pascals_to_mbar(double pascals) -{ - return pascals / 100; -} - -int8_t user_i2c_read(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len) -{ - write(file_descriptor, ®_addr, 1); - read(file_descriptor, data, len); - return 0; -} - -int8_t user_i2c_write(uint8_t id, uint8_t reg_addr, uint8_t *data, uint16_t len) -{ - int8_t *buf; - buf = malloc(len +1); - buf[0] = reg_addr; - memcpy(buf +1, data, len); - write(file_descriptor, buf, len +1); - free(buf); - return 0; -} - -void print_sensor_data(struct bme280_data *sensor_readings_data) -{ -#ifdef BME280_FLOAT_ENABLE - double fahrenheit = celsius_to_fahrenheit(sensor_readings_data->temperature); - double celsius = sensor_readings_data->temperature; - double pascals = sensor_readings_data->pressure; - double millibars = pascals_to_mbar(sensor_readings_data->pressure); - double humidity = sensor_readings_data->humidity; - printf("%0.2f\xc2\xb0\x46 / %0.2f\xc2\xb0\x43, %0.2fPa, %0.2fmbar, %0.2f%% \r\n", fahrenheit, celsius, pascals, millibars, humidity); -#else - uint32_t fahrenheit = celsius_to_fahrenheit(sensor_readings_data->temperature); - uint32_t celsius = sensor_readings_data->temperature; - uint32_t pascals = sensor_readings_data->pressure; - uint32_t millibars = pascals_to_mbar(sensor_readings_data->pressure); - uint32_t humidity = sensor_readings_data->humidity; - printf("%ld\xc2\xb0\x46 / %ld\xc2\xb0\x43, %ldPa, %ldmbar, %ld%% \r\n", fahrenheit, celsius, pascals, millibars, humidity); -#endif -} - -int8_t save_data_to_csv_file(struct bme280_data *sensor_readings_data) -{ - time_t rawtime = time(NULL); - struct tm *timeinfo; - char dateString[32]; - char datetimeString[32]; - char filename[100]; - FILE *csvFilePtr; - - double celsius = sensor_readings_data->temperature; - double fahrenheit = celsius_to_fahrenheit(sensor_readings_data->temperature); - double pascals = sensor_readings_data->pressure; - double millibars = pascals_to_mbar(sensor_readings_data->pressure); - double humidity = sensor_readings_data->humidity; - - timeinfo = localtime(&rawtime); - strftime(dateString, 32, "%F", timeinfo); - strftime(datetimeString, 32, "%F %H:%M:%S", timeinfo); - - snprintf(filename, sizeof(filename), "/home/pi/readings/readings_%s.csv", dateString); - - if (!check_file_exists(filename)) - { - printf("File for today does not exist! Creating... \n"); - FILE *csvFile = fopen(filename, "w"); - fputs("Date,Celsius,Fahrenheit,Pascals,Millibars,Humidity Percent\n", csvFile); - fclose(csvFile); - } - - csvFilePtr = fopen(filename, "a"); - if (csvFilePtr == NULL) - { - printf("Failed to open %s for writing...\n", filename); - exit(1); - } - fprintf(csvFilePtr, "%s,%0.5f,%0.5f,%0.5f,%0.5f,%0.5f\n", datetimeString, celsius, fahrenheit, pascals, millibars, humidity); - fclose(csvFilePtr); - - return 0; -} - -int8_t read_sensor_data_normal_mode(struct bme280_dev *dev) -{ - int8_t readings_result; - uint8_t settings_sel; - struct bme280_data sensor_readings_data; - - /* Recommended mode of operation: Indoor navigation */ - dev->settings.osr_h = BME280_OVERSAMPLING_1X; - dev->settings.osr_p = BME280_OVERSAMPLING_16X; - dev->settings.osr_t = BME280_OVERSAMPLING_2X; - dev->settings.filter = BME280_FILTER_COEFF_16; - dev->settings.standby_time = BME280_STANDBY_TIME_62_5_MS; - - settings_sel = BME280_OSR_PRESS_SEL; - settings_sel |= BME280_OSR_TEMP_SEL; - settings_sel |= BME280_OSR_HUM_SEL; - settings_sel |= BME280_STANDBY_SEL; - settings_sel |= BME280_FILTER_SEL; - readings_result = bme280_set_sensor_settings(settings_sel, dev); - readings_result = bme280_set_sensor_mode(BME280_NORMAL_MODE, dev); - readings_result = bme280_get_sensor_data(BME280_ALL, &sensor_readings_data, dev); - //print_sensor_data(&sensor_readings_data); - save_data_to_csv_file(&sensor_readings_data); - - return readings_result; -} - -int main(int argc, char* argv[]) -{ - struct bme280_dev dev; - int8_t init_result = BME280_OK; - - if ((file_descriptor = open(IIC_Dev, O_RDWR)) < 0) { - printf("Failed to open the i2c bus %s", argv[1]); - exit(1); - } - if (ioctl(file_descriptor, I2C_SLAVE, 0x76) < 0) { - printf("Failed to acquire bus access and/or talk to slave.\n"); - exit(1); - } - - dev.dev_id = BME280_I2C_ADDR_PRIM; //0x76 - //dev.dev_id = BME280_I2C_ADDR_SEC; //0x77 - dev.intf = BME280_I2C_INTF; - dev.read = user_i2c_read; - dev.write = user_i2c_write; - dev.delay_ms = user_delay_ms; - - init_result = bme280_init(&dev); - printf("\n\nBME280 Init Result is: %d\n\n", init_result); - - read_sensor_data_normal_mode(&dev); - - printf("Recorded readings.\n\n"); - - return 0; -}