From 9d826f07ac264f43441f06f26eabd7189808c46b Mon Sep 17 00:00:00 2001 From: hoi Date: Thu, 5 Feb 2026 16:13:50 -0800 Subject: [PATCH 1/7] getting started --- examples/bme280/Makefile | 11 + examples/bme280/README.md | 8 + examples/bme280/bme280.c | 1571 +++++++++++++++++++++++++++++++ examples/bme280/bme280.h | 398 ++++++++ examples/bme280/bme280_common.c | 164 ++++ examples/bme280/bme280_common.h | 132 +++ examples/bme280/bme280_defs.h | 494 ++++++++++ examples/bme280/bme280_sensor.c | 179 ++++ examples/bme280/bme280_sensor.h | 92 ++ examples/bme280/main.c | 24 + 10 files changed, 3073 insertions(+) create mode 100644 examples/bme280/Makefile create mode 100644 examples/bme280/README.md create mode 100644 examples/bme280/bme280.c create mode 100644 examples/bme280/bme280.h create mode 100644 examples/bme280/bme280_common.c create mode 100644 examples/bme280/bme280_common.h create mode 100644 examples/bme280/bme280_defs.h create mode 100644 examples/bme280/bme280_sensor.c create mode 100644 examples/bme280/bme280_sensor.h create mode 100644 examples/bme280/main.c diff --git a/examples/bme280/Makefile b/examples/bme280/Makefile new file mode 100644 index 000000000..cfe30ad8e --- /dev/null +++ b/examples/bme280/Makefile @@ -0,0 +1,11 @@ +# Makefile for user application + +# Specify this directory relative to the current application. +TOCK_USERLAND_BASE_DIR = ../.. + +# Which files to compile. +C_SRCS := $(wildcard *.c) + +# Include userland master makefile. Contains rules and flags for actually +# building the application. +include $(TOCK_USERLAND_BASE_DIR)/AppMakefile.mk diff --git a/examples/bme280/README.md b/examples/bme280/README.md new file mode 100644 index 000000000..5beecf91c --- /dev/null +++ b/examples/bme280/README.md @@ -0,0 +1,8 @@ +Blink App +========= + +The canonical "blink" app for an embedded platform. This app will +blink all of the LEDs that are registered with the kernel. + +To learn more, please see the +[Blink an LED](https://book.tockos.org/tutorials/01_running_blink) tutorial. diff --git a/examples/bme280/bme280.c b/examples/bme280/bme280.c new file mode 100644 index 000000000..47c8d9e05 --- /dev/null +++ b/examples/bme280/bme280.c @@ -0,0 +1,1571 @@ +/** +* Copyright (c) 2020 Bosch Sensortec GmbH. All rights reserved. +* +* BSD-3-Clause +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions are met: +* +* 1. Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* +* 2. 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. +* +* 3. Neither the name of the copyright holder nor the names of its +* 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 THE +* 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. +* +* @file bme280.c +* @date 2020-12-17 +* @version v3.5.1 +* +*/ + +/*! @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 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +static int8_t put_device_to_sleep(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 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +static int8_t write_power_mode(uint8_t sensor_mode, 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 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +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, uint32_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 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +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); + +/*! + * @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. + * @return True -> User wants to modify this group of settings + * @return 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 over sampling settings of the sensor. + * + * @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 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +static int8_t set_osr_humidity_settings(const struct bme280_settings *settings, 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] settings : Pointer variable which contains the settings to + * be set in the sensor. + * @param[in] dev : Structure instance of bme280_dev. + * + * @return Result of API execution status + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_settings *settings, + 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. + * @param[in] settings : Pointer variable which contains the settings to + * be set in the sensor. + * + * @return Result of API execution status + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +static int8_t set_osr_press_temp_settings(uint8_t desired_settings, + const struct bme280_settings *settings, + 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] settings : Pointer variable which contains the settings to + * be set in the sensor. + * @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] settings : Pointer variable which contains the settings to + * be set in the sensor. + * @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] settings : Pointer variable which contains the settings to + * be set in the sensor. + * @param[in] settings : Structure instance of bme280_settings. + * + * @return Result of API execution status + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +static int8_t set_filter_standby_settings(uint8_t desired_settings, + const struct bme280_settings *settings, + 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] settings : Pointer variable which contains the settings to + * be set in the sensor. + * @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] settings : Pointer variable which contains the settings to + * be set in the sensor. + * @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[in] settings : Pointer variable which contains the settings to + * be get in the sensor. + * @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 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 + */ +static void parse_sensor_data(const uint8_t *reg_data, struct bme280_uncomp_data *uncomp_data); + +/*! + * @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 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +static int8_t reload_device_settings(const struct bme280_settings *settings, struct bme280_dev *dev); + +#ifdef BME280_DOUBLE_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 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 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 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 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 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 in integer. + * + */ +static uint32_t compensate_humidity(const struct bme280_uncomp_data *uncomp_data, + const struct bme280_calib_data *calib_data); + +#endif + +/****************** 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; + uint8_t chip_id = 0; + + /* Read the chip-id of bme280 sensor */ + rslt = bme280_get_regs(BME280_REG_CHIP_ID, &chip_id, 1, dev); + + /* Check for chip id validity */ + if (rslt == BME280_OK) + { + if (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); + } + } + else + { + 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, uint32_t len, struct bme280_dev *dev) +{ + int8_t rslt; + + /* Check for null pointer in the device structure */ + rslt = null_ptr_check(dev); + + if ((rslt == BME280_OK) && (reg_data != NULL)) + { + /* If interface selected is SPI */ + if (dev->intf != BME280_I2C_INTF) + { + reg_addr = reg_addr | 0x80; + } + + /* Read the data */ + dev->intf_rslt = dev->read(reg_addr, reg_data, len, dev->intf_ptr); + + /* Check for communication error */ + if (dev->intf_rslt != BME280_INTF_RET_SUCCESS) + { + rslt = BME280_E_COMM_FAIL; + } + } + else + { + rslt = BME280_E_NULL_PTR; + } + + 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, uint32_t len, struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t temp_buff[20]; /* Typically not to write more than 10 registers */ + uint32_t temp_len; + uint32_t reg_addr_cnt; + + if (len > BME280_MAX_LEN) + { + len = BME280_MAX_LEN; + } + + /* 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; + } + + dev->intf_rslt = dev->write(reg_addr[0], temp_buff, temp_len, dev->intf_ptr); + + /* Check for communication error */ + if (dev->intf_rslt != BME280_INTF_RET_SUCCESS) + { + 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_settings *settings, + struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t sensor_mode; + + if (settings != NULL) + { + rslt = bme280_get_sensor_mode(&sensor_mode, dev); + + if ((rslt == BME280_OK) && (sensor_mode != BME280_POWERMODE_SLEEP)) + { + 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, 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, settings, dev); + } + } + } + else + { + rslt = BME280_E_NULL_PTR; + } + + 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_settings *settings, struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t reg_data[4]; + + if (settings != NULL) + { + rslt = bme280_get_regs(BME280_REG_CTRL_HUM, reg_data, 4, dev); + + if (rslt == BME280_OK) + { + parse_device_settings(reg_data, settings); + } + } + else + { + rslt = BME280_E_NULL_PTR; + } + + return rslt; +} + +/*! + * @brief This API sets the power mode of the sensor. + */ +int8_t bme280_set_sensor_mode(uint8_t sensor_mode, struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t last_set_mode; + + 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_POWERMODE_SLEEP)) + { + 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, struct bme280_dev *dev) +{ + int8_t rslt; + + if (sensor_mode != NULL) + { + /* Read the power mode register */ + rslt = bme280_get_regs(BME280_REG_PWR_CTRL, sensor_mode, 1, dev); + + /* Assign the power mode to variable */ + *sensor_mode = BME280_GET_BITS_POS_0(*sensor_mode, BME280_SENSOR_MODE); + } + else + { + rslt = BME280_E_NULL_PTR; + } + + return rslt; +} + +/*! + * @brief This API performs the soft reset of the sensor. + */ +int8_t bme280_soft_reset(struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t reg_addr = BME280_REG_RESET; + uint8_t status_reg = 0; + uint8_t try_run = 5; + + /* 0xB6 is the soft reset command */ + uint8_t soft_rst_cmd = BME280_SOFT_RESET_COMMAND; + + /* Write the soft reset command in the sensor */ + rslt = bme280_set_regs(®_addr, &soft_rst_cmd, 1, dev); + + if (rslt == BME280_OK) + { + /* If NVM not copied yet, Wait for NVM to copy */ + do + { + /* As per data sheet - Table 1, startup time is 2 ms. */ + dev->delay_us(BME280_STARTUP_DELAY, dev->intf_ptr); + rslt = bme280_get_regs(BME280_REG_STATUS, &status_reg, 1, dev); + + } while ((rslt == BME280_OK) && (try_run--) && (status_reg & BME280_STATUS_IM_UPDATE)); + + if (status_reg & BME280_STATUS_IM_UPDATE) + { + rslt = BME280_E_NVM_COPY_FAILED; + } + } + + 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_LEN_P_T_H_DATA] = { 0 }; + struct bme280_uncomp_data uncomp_data = { 0 }; + + if (comp_data != NULL) + { + /* Read the pressure and temperature data from the sensor */ + rslt = bme280_get_regs(BME280_REG_DATA, reg_data, BME280_LEN_P_T_H_DATA, dev); + + if (rslt == BME280_OK) + { + /* Parse the read data from the sensor */ + 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 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 API is used to calculate the maximum delay in milliseconds required for the + * temperature/pressure/humidity(whichever are enabled) measurement to complete. + */ +int8_t bme280_cal_meas_delay(uint32_t *max_delay, const struct bme280_settings *settings) +{ + int8_t rslt = BME280_OK; + uint8_t temp_osr; + uint8_t pres_osr; + uint8_t hum_osr; + + /* Array to map OSR config register value to actual OSR */ + uint8_t osr_sett_to_act_osr[] = { 0, 1, 2, 4, 8, 16 }; + + if ((settings != NULL) && (max_delay != NULL)) + { + /* Mapping osr settings to the actual osr values e.g. 0b101 -> osr X16 */ + if (settings->osr_t <= BME280_OVERSAMPLING_16X) + { + temp_osr = osr_sett_to_act_osr[settings->osr_t]; + } + else + { + temp_osr = BME280_OVERSAMPLING_MAX; + } + + if (settings->osr_p <= BME280_OVERSAMPLING_16X) + { + pres_osr = osr_sett_to_act_osr[settings->osr_p]; + } + else + { + pres_osr = BME280_OVERSAMPLING_MAX; + } + + if (settings->osr_h <= BME280_OVERSAMPLING_16X) + { + hum_osr = osr_sett_to_act_osr[settings->osr_h]; + } + else + { + hum_osr = BME280_OVERSAMPLING_MAX; + } + + (*max_delay) = + (uint32_t)((BME280_MEAS_OFFSET + (BME280_MEAS_DUR * temp_osr) + + ((BME280_MEAS_DUR * pres_osr) + BME280_PRES_HUM_MEAS_OFFSET) + + ((BME280_MEAS_DUR * hum_osr) + BME280_PRES_HUM_MEAS_OFFSET))); + } + else + { + rslt = BME280_E_NULL_PTR; + } + + return rslt; +} + +/****************************************************************************/ +/**\name INTERNAL APIs */ + +/*! + * @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, struct bme280_dev *dev) +{ + int8_t rslt = BME280_W_INVALID_OSR_MACRO; + + if (desired_settings & BME280_SEL_OSR_HUM) + { + rslt = set_osr_humidity_settings(settings, dev); + } + + if (desired_settings & (BME280_SEL_OSR_PRESS | BME280_SEL_OSR_TEMP)) + { + 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, struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t ctrl_hum; + uint8_t ctrl_meas; + uint8_t reg_addr = BME280_REG_CTRL_HUM; + + 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_REG_CTRL_MEAS; + 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, + struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t reg_addr = BME280_REG_CTRL_MEAS; + uint8_t reg_data; + + rslt = bme280_get_regs(reg_addr, ®_data, 1, dev); + + if (rslt == BME280_OK) + { + if (desired_settings & BME280_SEL_OSR_PRESS) + { + fill_osr_press_settings(®_data, settings); + } + + if (desired_settings & BME280_SEL_OSR_TEMP) + { + 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, + struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t reg_addr = BME280_REG_CONFIG; + uint8_t reg_data; + + rslt = bme280_get_regs(reg_addr, ®_data, 1, dev); + + if (rslt == BME280_OK) + { + if (desired_settings & BME280_SEL_FILTER) + { + fill_filter_settings(®_data, settings); + } + + if (desired_settings & BME280_SEL_STANDBY) + { + 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 + * bme280_settings 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 API is used to parse the pressure, temperature and + * humidity data and store it in the bme280_uncomp_data structure instance. + */ +static void 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] << BME280_12_BIT_SHIFT; + data_lsb = (uint32_t)reg_data[1] << BME280_4_BIT_SHIFT; + data_xlsb = (uint32_t)reg_data[2] >> BME280_4_BIT_SHIFT; + uncomp_data->pressure = data_msb | data_lsb | data_xlsb; + + /* Store the parsed register values for temperature data */ + data_msb = (uint32_t)reg_data[3] << BME280_12_BIT_SHIFT; + data_lsb = (uint32_t)reg_data[4] << BME280_4_BIT_SHIFT; + data_xlsb = (uint32_t)reg_data[5] >> BME280_4_BIT_SHIFT; + uncomp_data->temperature = data_msb | data_lsb | data_xlsb; + + /* Store the parsed register values for humidity data */ + data_msb = (uint32_t)reg_data[6] << BME280_8_BIT_SHIFT; + data_lsb = (uint32_t)reg_data[7]; + uncomp_data->humidity = data_msb | data_lsb; +} + +/*! + * @brief This internal API writes the power mode in the sensor. + */ +static int8_t write_power_mode(uint8_t sensor_mode, struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t reg_addr = BME280_REG_PWR_CTRL; + + /* 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(struct bme280_dev *dev) +{ + int8_t rslt; + uint8_t reg_data[4]; + struct bme280_settings settings; + + rslt = bme280_get_regs(BME280_REG_CTRL_HUM, 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, struct bme280_dev *dev) +{ + int8_t rslt; + + rslt = set_osr_settings(BME280_SEL_ALL_SETTINGS, settings, dev); + + if (rslt == BME280_OK) + { + rslt = set_filter_standby_settings(BME280_SEL_ALL_SETTINGS, settings, dev); + } + + return rslt; +} + +#ifdef BME280_DOUBLE_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 > (0.0)) + { + 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; +} +#ifndef BME280_32BIT_ENABLE /* 64 bit compensation for pressure data */ + +/*! + * @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 * INT64_C(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 /* 32 bit compensation for pressure data */ + +/*! + * @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_REG_TEMP_PRESS_CALIB_DATA; + + /* Array to store calibration data */ + uint8_t calib_data[BME280_LEN_TEMP_PRESS_CALIB_DATA] = { 0 }; + + /* Read the calibration data from the sensor */ + rslt = bme280_get_regs(reg_addr, calib_data, BME280_LEN_TEMP_PRESS_CALIB_DATA, 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_REG_HUMIDITY_CALIB_DATA; + + /* Read the humidity calibration data from the sensor */ + rslt = bme280_get_regs(reg_addr, calib_data, BME280_LEN_HUMIDITY_CALIB_DATA, 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, uint32_t len) +{ + uint32_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_us == NULL)) + { + /* Device structure pointer is not valid */ + rslt = BME280_E_NULL_PTR; + } + else + { + /* Device structure is fine */ + rslt = BME280_OK; + } + + return rslt; +} \ No newline at end of file diff --git a/examples/bme280/bme280.h b/examples/bme280/bme280.h new file mode 100644 index 000000000..8b47c303b --- /dev/null +++ b/examples/bme280/bme280.h @@ -0,0 +1,398 @@ +/** +* Copyright (c) 2020 Bosch Sensortec GmbH. All rights reserved. +* +* BSD-3-Clause +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions are met: +* +* 1. Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* +* 2. 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. +* +* 3. Neither the name of the copyright holder nor the names of its +* 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 THE +* 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. +* +* @file bme280.h +* @date 2020-12-17 +* @version v3.5.1 +* +*/ + +/*! @file bme280.h + * @brief Sensor driver for BME280 sensor + */ + +/*! + * @ingroup stm32 + * @defgroup bme280 BME280 + * @brief Product Overview + * and Sensor API Source Code + */ + +#ifndef _BME280_H +#define _BME280_H + +/*! CPP guard */ +#ifdef __cplusplus +extern "C" { +#endif + +/* Header includes */ +#include "bme280_defs.h" + +/** + * \ingroup bme280 + * \defgroup bme280ApiInit Initialization + * @brief Initialize the sensor and device structure + */ + +/*! + * \ingroup bme280ApiInit + * \page bme280_api_bme280_init bme280_init + * \code + * int8_t bme280_init(struct bme280_dev *dev); + * \endcode + * @details This API reads the chip-id of the sensor which is the first step to + * verify the sensor and also calibrates the sensor + * As this API is the entry point, call this API before using other APIs. + * + * @param[in,out] dev : Structure instance of bme280_dev + * + * @return Result of API execution status. + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_init(struct bme280_dev *dev); + +/** + * \ingroup bme280 + * \defgroup bme280ApiRegister Registers + * @brief Generic API for accessing sensor registers + */ + +/*! + * \ingroup bme280ApiRegister + * \page bme280_api_bme280_set_regs bme280_set_regs + * \code + * int8_t bme280_set_regs(const uint8_t reg_addr, const uint8_t *reg_data, uint32_t len, struct bme280_dev *dev); + * \endcode + * @details This API writes the given data to the register address of the sensor + * + * @param[in] reg_addr : Register addresses to where the data is to be written + * @param[in] reg_data : Pointer to data buffer which is to be written + * in the reg_addr of sensor. + * @param[in] len : No of bytes of data to write + * @param[in,out] dev : Structure instance of bme280_dev + * + * @return Result of API execution status. + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_set_regs(uint8_t *reg_addr, const uint8_t *reg_data, uint32_t len, struct bme280_dev *dev); + +/*! + * \ingroup bme280ApiRegister + * \page bme280_api_bme280_get_regs bme280_get_regs + * \code + * int8_t bme280_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint32_t len, struct bme280_dev *dev); + * \endcode + * @details This API reads the data from the given register address of 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,out] dev : Structure instance of bme280_dev. + * + * @return Result of API execution status. + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint32_t len, struct bme280_dev *dev); + +/** + * \ingroup bme280 + * \defgroup bme280ApiSensorSettings Sensor Settings + * @brief Generic API for accessing sensor settings + */ + +/*! + * \ingroup bme280ApiSensorSettings + * \page bme280_api_bme280_set_sensor_settings bme280_set_sensor_settings + * \code + * int8_t bme280_set_sensor_settings(uint8_t desired_settings, const struct bme280_settings *settings, struct bme280_dev *dev); + * \endcode + * @details This API sets the oversampling, filter and standby duration + * (normal mode) settings in the sensor. + * + * @param[in] desired_settings : Variable used to select the settings which + * are to be set in the sensor. + * @param[in] settings : Structure instance of bme280_settings. + * @param[in] dev : Structure instance of bme280_dev. + * + * @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. + * + *@verbatim + * Macros | Functionality + * -----------------------|---------------------------------------------- + * BME280_SEL_OSR_PRESS | To set pressure oversampling. + * BME280_SEL_OSR_TEMP | To set temperature oversampling. + * BME280_SEL_OSR_HUM | To set humidity oversampling. + * BME280_SEL_FILTER | To set filter setting. + * BME280_SEL_STANDBY | To set standby duration setting. + *@endverbatim + * + * @return Result of API execution status + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_set_sensor_settings(uint8_t desired_settings, + const struct bme280_settings *settings, + struct bme280_dev *dev); + +/*! + * \ingroup bme280ApiSensorSettings + * \page bme280_api_bme280_get_sensor_settings bme280_get_sensor_settings + * \code + * int8_t bme280_get_sensor_settings(struct bme280_settings *settings, struct bme280_dev *dev); + * \endcode + * @details This API gets the oversampling, filter and standby duration + * (normal mode) settings from the sensor. + * + * @param[in] settings : Structure instance of bme280_settings. + * @param[in,out] dev : Structure instance of bme280_dev. + * + * @return Result of API execution status + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_get_sensor_settings(struct bme280_settings *settings, struct bme280_dev *dev); + +/** + * \ingroup bme280 + * \defgroup bme280ApiSensorMode Sensor Mode + * @brief Generic API for configuring sensor power mode + */ + +/*! + * \ingroup bme280ApiSensorMode + * \page bme280_api_bme280_set_sensor_mode bme280_set_sensor_mode + * \code + * int8_t bme280_set_sensor_mode(uint8_t sensor_mode, const struct bme280_dev *dev); + * \endcode + * @details This API sets the power mode of the sensor. + * + * @param[in] sensor_mode : Variable which contains the power mode to be set. + * @param[in] dev : Structure instance of bme280_dev. + * + *@verbatim + * sensor_mode | Macros + * ---------------------|------------------------- + * 0 | BME280_POWERMODE_SLEEP + * 1 | BME280_POWERMODE_FORCED + * 3 | BME280_POWERMODE_NORMAL + *@endverbatim + * + * @return Result of API execution status + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_set_sensor_mode(uint8_t sensor_mode, struct bme280_dev *dev); + +/*! + * \ingroup bme280ApiSensorMode + * \page bme280_api_bme280_get_sensor_mode bme280_get_sensor_mode + * \code + * int8_t bme280_get_sensor_mode(uint8_t *sensor_mode, struct bme280_dev *dev); + * \endcode + * @details This API gets the power mode of the sensor. + * + * @param[out] sensor_mode : Pointer variable to store the power mode. + * @param[in] dev : Structure instance of bme280_dev. + * + *@verbatim + * sensor_mode | Macros + * ---------------------|------------------------- + * 0 | BME280_POWERMODE_SLEEP + * 1 | BME280_POWERMODE_FORCED + * 3 | BME280_POWERMODE_NORMAL + *@endverbatim + * + * @return Result of API execution status + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_get_sensor_mode(uint8_t *sensor_mode, struct bme280_dev *dev); + +/** + * \ingroup bme280 + * \defgroup bme280ApiSystem System + * @brief API that performs system-level operations + */ + +/*! + * \ingroup bme280ApiSystem + * \page bme280_api_bme280_soft_reset bme280_soft_reset + * \code + * int8_t bme280_soft_reset(struct bme280_dev *dev); + * \endcode + * @details This API soft-resets the sensor. + * + * @param[in,out] dev : Structure instance of bme280_dev. + * + * @return Result of API execution status. + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_soft_reset(struct bme280_dev *dev); + +/** + * \ingroup bme280 + * \defgroup bme280ApiSensorData Sensor Data + * @brief Data processing of sensor + */ + +/*! + * \ingroup bme280ApiSensorData + * \page bme280_api_bme280_get_sensor_data bme280_get_sensor_data + * \code + * int8_t bme280_get_sensor_data(uint8_t sensor_comp, struct bme280_data *comp_data, struct bme280_dev *dev); + * \endcode + * @details 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. + * + *@verbatim + * sensor_comp | Macros + * ------------|------------------- + * 1 | BME280_PRESS + * 2 | BME280_TEMP + * 4 | BME280_HUM + * 7 | BME280_ALL + *@endverbatim + * + * @param[out] comp_data : Structure instance of bme280_data. + * @param[in] dev : Structure instance of bme280_dev. + * + * @return Result of API execution status + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_get_sensor_data(uint8_t sensor_comp, struct bme280_data *comp_data, struct bme280_dev *dev); + +/*! + * \ingroup bme280ApiSensorData + * \page bme280_api_bme280_compensate_data bme280_compensate_data + * \code + * 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); + * \endcode + * @details 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 bme280_calib_data + * + * @return Result of API execution status. + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +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); + +/** + * \ingroup bme280 + * \defgroup bme280ApiSensorDelay Sensor Delay + * @brief Generic API for measuring sensor delay + */ + +/*! + * \ingroup bme280ApiSensorDelay + * \page bme280_api_bme280_cal_meas_delay bme280_cal_meas_delay + * \code + * uint32_t bme280_cal_meas_delay(uint32_t *max_delay, const struct bme280_settings *settings); + * \endcode + * + * @details This API is used to calculate the maximum delay in microseconds required for the + * temperature/pressure/humidity(whichever are enabled) measurement to complete. + * The delay depends upon the number of sensors enabled and their oversampling configuration. + * + * @param[out] max_delay : Delay required in microseconds. + * @param[in] settings : Contains the oversampling configurations. + * + * @return Result of API execution status. + * + * @retval 0 -> Success. + * @retval > 0 -> Warning. + * @retval < 0 -> Fail. + * + */ +int8_t bme280_cal_meas_delay(uint32_t *max_delay, const struct bme280_settings *settings); + +#ifdef __cplusplus +} +#endif /* End of CPP guard */ +#endif /* _BME280_H */ +/** @}*/ \ No newline at end of file diff --git a/examples/bme280/bme280_common.c b/examples/bme280/bme280_common.c new file mode 100644 index 000000000..a9aa4990b --- /dev/null +++ b/examples/bme280/bme280_common.c @@ -0,0 +1,164 @@ +/** + * Copyright (C) 2020 Bosch Sensortec GmbH. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include +#include +#include +#include +#include + +#include "bme280.h" +#include "bme280_common.h" + +/******************************************************************************/ +/*! Macros */ + + +/******************************************************************************/ +/*! Static variable definition */ + +/*! Variable that holds the I2C device address or SPI chip selection */ +static uint8_t dev_addr; + +/** + * @brief Timeout for I2C calls + */ + +/******************************************************************************/ +/*! User interface functions */ + +/*! + * I2C read function map to COINES platform + */ +BME280_INTF_RET_TYPE bme280_i2c_read(uint8_t reg_addr, uint8_t *reg_data, uint32_t length, void *intf_ptr) +{ + dev_addr = *(uint8_t*)intf_ptr; + reg_data[0] = reg_addr; + + int status = i2c_master_write_read_sync(dev_addr << 1, reg_data, 1, length); + + + if (status != 0) { + return BME280_E_COMM_FAIL; + } + + return BME280_OK; +} + +/*! + * I2C write function map to COINES platform + */ +BME280_INTF_RET_TYPE bme280_i2c_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr) +{ + dev_addr = *(uint8_t*)intf_ptr; + + int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); + + if (status != 0) { + return BME280_E_COMM_FAIL; + } + + status = i2c_master_write_sync(dev_addr << 1, (uint8_t *) reg_data, length); + + if (status != 0) { + return BME280_E_COMM_FAIL; + } + + return BME280_OK; +} + + + +/*! + * Delay function map to COINES platform + */ +void bme280_delay_us(uint32_t period, void *intf_ptr) +{ + // calculate us to ms + uint32_t period_ms = period / 1000; + + // if no period then set to 1 to ensure delay + if (period_ms == 0) { + period_ms = 1; + } + + // delay + libtocksync_alarm_delay_ms(period_ms); +} + +/*! + * @brief Prints the execution status of the APIs. + */ +void bme280_error_codes_print_result(const char api_name[], int8_t rslt) +{ + if (rslt != BME280_OK) + { + printf("%s\t", api_name); + + switch (rslt) + { + case BME280_E_NULL_PTR: + printf("Error [%d] : Null pointer error.", rslt); + printf("It occurs when the user tries to assign value (not address) to a pointer, which has been initialized to NULL.\r\n"); + break; + + case BME280_E_COMM_FAIL: + printf("Error [%d] : Communication failure error.", rslt); + printf("It occurs due to read/write operation failure and also due to power failure during communication\r\n"); + break; + + case BME280_E_DEV_NOT_FOUND: + printf("Error [%d] : Device not found error. It occurs when the device chip id is incorrectly read\r\n", + rslt); + break; + + case BME280_E_INVALID_LEN: + printf("Error [%d] : Invalid length error. It occurs when write is done with invalid length\r\n", rslt); + break; + + default: + printf("Error [%d] : Unknown error code\r\n", rslt); + break; + } + } +} + +/*! + * @brief Function to select the interface between SPI and I2C. + */ +int8_t bme280_interface_selection(struct bme280_dev *dev, uint8_t intf) +{ + int8_t rslt = BME280_OK; + + if (dev != NULL) + { + /* Bus configuration : I2C */ + if (intf == BME280_I2C_INTF) + { + dev_addr = BME280_I2C_ADDR_SEC; + dev->read = bme280_i2c_read; + dev->write = bme280_i2c_write; + dev->intf = BME280_I2C_INTF; + } + /* Bus configuration : SPI */ + else if (intf == BME280_SPI_INTF) + { + rslt = BME280_E_DEV_NOT_FOUND; + } + + /* Holds the I2C device addr or SPI chip selection */ + dev->intf_ptr = &dev_addr; + + /* Configure delay in microseconds */ + dev->delay_us = bme280_delay_us; + } + else + { + rslt = BME280_E_NULL_PTR; + } + + return rslt; +} \ No newline at end of file diff --git a/examples/bme280/bme280_common.h b/examples/bme280/bme280_common.h new file mode 100644 index 000000000..54fff6d0f --- /dev/null +++ b/examples/bme280/bme280_common.h @@ -0,0 +1,132 @@ +/**\ + * Copyright (c) 2020 Bosch Sensortec GmbH. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + **/ + +#ifndef __BME280_COMMON_H__ +#define __BME280_COMMON_H__ + +/*! CPP guard */ +#ifdef __cplusplus +extern "C" { +#endif + +#include +#include "bme280.h" + +/***************************************************************************/ + +/*! User function prototypes + ****************************************************************************/ + +/*! + * @brief Function for reading the sensor's registers through SPI bus. + * + * @param[in] reg_addr : Register address from which data is read. + * @param[out] reg_data : Pointer to data buffer where read data is stored. + * @param[in] length : Number of bytes of data to be read. + * @param[in, out] intf_ptr : Void pointer that can enable the linking of descriptors + * for interface related call backs. + * + * @return Status of execution + * + * @retval BME280_INTF_RET_SUCCESS -> Success. + * @retval != BME280_INTF_RET_SUCCESS -> Failure. + * + */ +BME280_INTF_RET_TYPE bme280_spi_read(uint8_t reg_addr, uint8_t *reg_data, uint32_t length, void *intf_ptr); + +/*! + * @brief Function for reading the sensor's registers through I2C bus. + * + * @param[in] reg_addr : Register address from which data is read. + * @param[out] reg_data : Pointer to data buffer where read data is stored. + * @param[in] length : Number of bytes of data to be read. + * @param[in, out] intf_ptr : Void pointer that can enable the linking of descriptors + * for interface related call backs. + * + * @return Status of execution + * + * @retval BME280_INTF_RET_SUCCESS -> Success. + * @retval != BME280_INTF_RET_SUCCESS -> Failure. + * + */ +BME280_INTF_RET_TYPE bme280_i2c_read(uint8_t reg_addr, uint8_t *reg_data, uint32_t length, void *intf_ptr); + +/*! + * @brief Function for writing the sensor's registers through SPI bus. + * + * @param[in] reg_addr : Register address to which the data is written. + * @param[in] reg_data : Pointer to data buffer in which data to be written + * is stored. + * @param[in] length : Number of bytes of data to be written. + * @param[in, out] intf_ptr : Void pointer that can enable the linking of descriptors + * for interface related call backs + * + * @return Status of execution + * + * @retval BME280_INTF_RET_SUCCESS -> Success. + * @retval != BME280_INTF_RET_SUCCESS -> Failure. + * + */ +BME280_INTF_RET_TYPE bme280_spi_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr); + +/*! + * @brief Function for writing the sensor's registers through I2C bus. + * + * @param[in] reg_addr : Register address to which the data is written. + * @param[in] reg_data : Pointer to data buffer in which data to be written + * is stored. + * @param[in] length : Number of bytes of data to be written. + * @param[in, out] intf_ptr : Void pointer that can enable the linking of descriptors + * for interface related call backs + * + * @return Status of execution + * + * @retval BME280_INTF_RET_SUCCESS -> Success. + * @retval != BME280_INTF_RET_SUCCESS -> Failure. + * + */ +BME280_INTF_RET_TYPE bme280_i2c_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr); + +/*! + * @brief This function provides the delay for required time (Microsecond) as per the input provided in some of the + * APIs. + * + * @param[in] period_us : The required wait time in microsecond. + * @param[in] intf_ptr : Interface pointer + * + * @return void. + */ +void bme280_delay_us(uint32_t period_us, void *intf_ptr); + +/*! + * @brief This function is to select the interface between SPI and I2C. + * + * @param[in] dev : Structure instance of bme280_dev + * @param[in] intf : Interface selection parameter + * For I2C : BME280_I2C_INTF + * For SPI : BME280_SPI_INTF + * + * @return Status of execution + * @retval 0 -> Success + * @retval < 0 -> Failure + */ +int8_t bme280_interface_selection(struct bme280_dev *dev, uint8_t intf); + +/*! + * @brief This API is used to print the execution status. + * + * @param[in] api_name : Name of the API whose execution status has to be printed. + * @param[in] rslt : Error code returned by the API whose execution status has to be printed. + * + * @return void. + */ +void bme280_error_codes_print_result(const char api_name[], int8_t rslt); + +#ifdef __cplusplus +} +#endif /* End of CPP guard */ + +#endif /* __BME280_COMMON_H__ */ \ No newline at end of file diff --git a/examples/bme280/bme280_defs.h b/examples/bme280/bme280_defs.h new file mode 100644 index 000000000..e7edacdf9 --- /dev/null +++ b/examples/bme280/bme280_defs.h @@ -0,0 +1,494 @@ +/** +* Copyright (c) 2020 Bosch Sensortec GmbH. All rights reserved. +* +* BSD-3-Clause +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions are met: +* +* 1. Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* +* 2. 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. +* +* 3. Neither the name of the copyright holder nor the names of its +* 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 THE +* 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. +* +* @file bme280_defs.h +* @date 2020-12-17 +* @version v3.5.1 +* +*/ + +#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 + +/******************************************************************************/ +/*! @name Compiler switch macros Definitions */ +/******************************************************************************/ +#ifndef BME280_64BIT_ENABLE /*< Check if 64-bit integer (using BME280_64BIT_ENABLE) is enabled */ +#ifndef BME280_32BIT_ENABLE /*< Check if 32-bit integer (using BME280_32BIT_ENABLE) is enabled */ +#ifndef BME280_DOUBLE_ENABLE /*< If any of the integer data types not enabled then enable BME280_DOUBLE_ENABLE */ +#define BME280_DOUBLE_ENABLE +#endif +#endif +#endif + +/******************************************************************************/ +/*! @name General Macro Definitions */ +/******************************************************************************/ +#ifndef TRUE +#define TRUE UINT8_C(1) +#endif +#ifndef FALSE +#define FALSE UINT8_C(0) +#endif + +/*! + * BME280_INTF_RET_TYPE is the read/write interface return type which can be overwritten by the build system. + */ +#ifndef BME280_INTF_RET_TYPE +#define BME280_INTF_RET_TYPE int8_t +#endif + +/*! + * The last error code from read/write interface is stored in the device structure as intf_rslt. + */ +#ifndef BME280_INTF_RET_SUCCESS +#define BME280_INTF_RET_SUCCESS INT8_C(0) +#endif + +/*! @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_COMM_FAIL INT8_C(-2) +#define BME280_E_INVALID_LEN INT8_C(-3) +#define BME280_E_DEV_NOT_FOUND INT8_C(-4) +#define BME280_E_SLEEP_MODE_FAIL INT8_C(-5) +#define BME280_E_NVM_COPY_FAILED INT8_C(-6) + +/*! @name API warning codes */ +#define BME280_W_INVALID_OSR_MACRO INT8_C(1) + +/*! @name BME280 chip identifier */ +#define BME280_CHIP_ID UINT8_C(0x60) + +/*! @name I2C addresses */ +#define BME280_I2C_ADDR_PRIM UINT8_C(0x76) +#define BME280_I2C_ADDR_SEC UINT8_C(0x77) + +/*! @name Register Address */ +#define BME280_REG_CHIP_ID UINT8_C(0xD0) +#define BME280_REG_RESET UINT8_C(0xE0) +#define BME280_REG_TEMP_PRESS_CALIB_DATA UINT8_C(0x88) +#define BME280_REG_HUMIDITY_CALIB_DATA UINT8_C(0xE1) +#define BME280_REG_CTRL_HUM UINT8_C(0xF2) +#define BME280_REG_STATUS UINT8_C(0xF3) +#define BME280_REG_PWR_CTRL UINT8_C(0xF4) +#define BME280_REG_CTRL_MEAS UINT8_C(0xF4) +#define BME280_REG_CONFIG UINT8_C(0xF5) +#define BME280_REG_DATA UINT8_C(0xF7) + +/*! @name Macros related to size */ +#define BME280_LEN_TEMP_PRESS_CALIB_DATA UINT8_C(26) +#define BME280_LEN_HUMIDITY_CALIB_DATA UINT8_C(7) +#define BME280_LEN_P_T_H_DATA UINT8_C(8) + +/*! @name Sensor power modes */ +#define BME280_POWERMODE_SLEEP UINT8_C(0x00) +#define BME280_POWERMODE_FORCED UINT8_C(0x01) +#define BME280_POWERMODE_NORMAL UINT8_C(0x03) + +#define BME280_SENSOR_MODE_MSK UINT8_C(0x03) +#define BME280_SENSOR_MODE_POS UINT8_C(0x00) + +/*! @name Soft reset command */ +#define BME280_SOFT_RESET_COMMAND UINT8_C(0xB6) + +#define BME280_STATUS_IM_UPDATE UINT8_C(0x01) +#define BME280_STATUS_MEAS_DONE UINT8_C(0x08) + +/*! @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_SEL_OSR_PRESS UINT8_C(1) +#define BME280_SEL_OSR_TEMP UINT8_C(1 << 1) +#define BME280_SEL_OSR_HUM UINT8_C(1 << 2) +#define BME280_SEL_FILTER UINT8_C(1 << 3) +#define BME280_SEL_STANDBY UINT8_C(1 << 4) +#define BME280_SEL_ALL_SETTINGS 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) +#define BME280_OVERSAMPLING_MAX UINT8_C(16) + +#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) + +/*! @name Measurement delay calculation macros */ +#define BME280_MEAS_OFFSET UINT16_C(1250) +#define BME280_MEAS_DUR UINT16_C(2300) +#define BME280_PRES_HUM_MEAS_OFFSET UINT16_C(575) +#define BME280_MEAS_SCALING_FACTOR UINT16_C(1000) +#define BME280_STARTUP_DELAY UINT16_C(2000) + +/*! @name Length macros */ +#define BME280_MAX_LEN UINT8_C(10) + +/*! @name Standby duration selection macros */ +#define BME280_STANDBY_TIME_0_5_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) + +#define BME280_STANDBY_MSK UINT8_C(0xE0) +#define BME280_STANDBY_POS UINT8_C(0x05) + +/*! @name Bit shift macros */ +#define BME280_12_BIT_SHIFT UINT8_C(12) +#define BME280_8_BIT_SHIFT UINT8_C(8) +#define BME280_4_BIT_SHIFT UINT8_C(4) + +/*! @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) + +#define BME280_FILTER_MSK UINT8_C(0x1C) +#define BME280_FILTER_POS UINT8_C(0x02) + +/*! @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) + +/*! @name Macro to SET and GET BITS of a register */ +#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)) + +/********************************************************/ + +/*! + * @brief Interface selection Enums + */ +enum bme280_intf { + /*! SPI interface */ + BME280_SPI_INTF, + /*! I2C interface */ + BME280_I2C_INTF +}; + +/******************************************************************************/ +/*! @name Function Pointers */ +/******************************************************************************/ + +/*! + * @brief Bus communication function pointer which should be mapped to + * the platform specific read functions of the user + * + * @param[in] reg_addr : Register address from which data is read. + * @param[out] reg_data : Pointer to data buffer where read data is stored. + * @param[in] len : Number of bytes of data to be read. + * @param[in, out] intf_ptr : Void pointer that can enable the linking of descriptors + * for interface related call backs. + * + * @retval 0 -> Success. + * @retval Non zero value -> Fail. + * + */ +typedef BME280_INTF_RET_TYPE (*bme280_read_fptr_t)(uint8_t reg_addr, uint8_t *reg_data, uint32_t len, void *intf_ptr); + +/*! + * @brief Bus communication function pointer which should be mapped to + * the platform specific write functions of the user + * + * @param[in] reg_addr : Register address to which the data is written. + * @param[in] reg_data : Pointer to data buffer in which data to be written + * is stored. + * @param[in] len : Number of bytes of data to be written. + * @param[in, out] intf_ptr : Void pointer that can enable the linking of descriptors + * for interface related call backs + * + * @retval 0 -> Success. + * @retval Non zero value -> Fail. + * + */ +typedef BME280_INTF_RET_TYPE (*bme280_write_fptr_t)(uint8_t reg_addr, const uint8_t *reg_data, uint32_t len, + void *intf_ptr); + +/*! + * @brief Delay function pointer which should be mapped to + * delay function of the user + * + * @param[in] period : Delay in microseconds. + * @param[in, out] intf_ptr : Void pointer that can enable the linking of descriptors + * for interface related call backs + * + */ +typedef void (*bme280_delay_us_fptr_t)(uint32_t period, void *intf_ptr); + +/******************************************************************************/ +/*! @name Structure Declarations */ +/******************************************************************************/ + +/*! + * @brief Calibration data + */ +struct bme280_calib_data +{ + /*! Calibration coefficient for the temperature sensor */ + uint16_t dig_t1; + + /*! Calibration coefficient for the temperature sensor */ + int16_t dig_t2; + + /*! Calibration coefficient for the temperature sensor */ + int16_t dig_t3; + + /*! Calibration coefficient for the pressure sensor */ + uint16_t dig_p1; + + /*! Calibration coefficient for the pressure sensor */ + int16_t dig_p2; + + /*! Calibration coefficient for the pressure sensor */ + int16_t dig_p3; + + /*! Calibration coefficient for the pressure sensor */ + int16_t dig_p4; + + /*! Calibration coefficient for the pressure sensor */ + int16_t dig_p5; + + /*! Calibration coefficient for the pressure sensor */ + int16_t dig_p6; + + /*! Calibration coefficient for the pressure sensor */ + int16_t dig_p7; + + /*! Calibration coefficient for the pressure sensor */ + int16_t dig_p8; + + /*! Calibration coefficient for the pressure sensor */ + int16_t dig_p9; + + /*! Calibration coefficient for the humidity sensor */ + uint8_t dig_h1; + + /*! Calibration coefficient for the humidity sensor */ + int16_t dig_h2; + + /*! Calibration coefficient for the humidity sensor */ + uint8_t dig_h3; + + /*! Calibration coefficient for the humidity sensor */ + int16_t dig_h4; + + /*! Calibration coefficient for the humidity sensor */ + int16_t dig_h5; + + /*! Calibration coefficient for the humidity sensor */ + int8_t dig_h6; + + /*! Variable to store the intermediate temperature coefficient */ + int32_t t_fine; +}; + +/*! + * @brief bme280 sensor structure which comprises of temperature, pressure and + * humidity data + */ +#ifdef BME280_DOUBLE_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; + + /*! Interface Selection + * For SPI, intf = BME280_SPI_INTF + * For I2C, intf = BME280_I2C_INTF + */ + enum bme280_intf intf; + + /*! + * The interface pointer is used to enable the user + * to link their interface descriptors for reference during the + * implementation of the read and write interfaces to the + * hardware. + */ + void *intf_ptr; + + /*! Variable to store result of read/write function */ + BME280_INTF_RET_TYPE intf_rslt; + + /*! Read function pointer */ + bme280_read_fptr_t read; + + /*! Write function pointer */ + bme280_write_fptr_t write; + + /*! Delay function pointer */ + bme280_delay_us_fptr_t delay_us; + + /*! Trim data */ + struct bme280_calib_data calib_data; +}; + +#endif /* _BME280_DEFS_H */ \ No newline at end of file diff --git a/examples/bme280/bme280_sensor.c b/examples/bme280/bme280_sensor.c new file mode 100644 index 000000000..5c114c1fa --- /dev/null +++ b/examples/bme280/bme280_sensor.c @@ -0,0 +1,179 @@ +#include "bme280_sensor.h" + +// system includes +#include "sys_app.h" +#include "stm32_systime.h" + +// user includes +#include "bme280_common.h" +#include "transcoder.h" +#include "userConfig.h" +#include "sensor.h" +#include "sensors.h" + +/** + * @brief Required time between measurements + * + * @see BME280Init + */ +static uint32_t period = 0; + +/** + * @brief Device definition + * + * @see BME280Init + */ +static struct bme280_dev dev; + +/** + * @brief Device settings + * + * @see BME280Init + */ +static struct bme280_settings settings; + + +BME280Status BME280Init(void) { + int8_t rslt; + + /* Interface selection is to be updated as parameter + * For I2C : BME280_I2C_INTF + * For SPI : BME280_SPI_INTF + */ + rslt = bme280_interface_selection(&dev, BME280_I2C_INTF); + if (rslt != BME280_OK) { + return rslt; + } + + rslt = bme280_init(&dev); + if (rslt != BME280_OK) { + return rslt; + } + + /* Always read the current settings before writing, especially when all the configuration is not modified */ + rslt = bme280_get_sensor_settings(&settings, &dev); + if (rslt != BME280_OK) { + return rslt; + } + + /* Configuring the over-sampling rate, filter coefficient and standby time */ + /* Overwrite the desired settings */ + settings.filter = BME280_FILTER_COEFF_OFF; + + /* Over-sampling rate for humidity, temperature and pressure */ + settings.osr_h = BME280_OVERSAMPLING_1X; + settings.osr_p = BME280_OVERSAMPLING_1X; + settings.osr_t = BME280_OVERSAMPLING_1X; + + /* Setting the standby time */ + settings.standby_time = BME280_STANDBY_TIME_0_5_MS; + + rslt = bme280_set_sensor_settings(BME280_SEL_ALL_SETTINGS, &settings, &dev); + if (rslt != BME280_OK) { + return rslt; + } + + /* Always set the power mode after setting the configuration */ + rslt = bme280_set_sensor_mode(BME280_POWERMODE_FORCED, &dev); + if (rslt != BME280_OK) { + return rslt; + } + + /* Calculate measurement time in microseconds */ + rslt = bme280_cal_meas_delay(&period, &settings); + if (rslt != BME280_OK) { + return rslt; + } + + return rslt; +} + +BME280Status BME280MeasureAll(BME280Data *data) { + int8_t rslt = BME280_E_NULL_PTR; + uint8_t status_reg; + + // trigger measurement + rslt = bme280_set_sensor_mode(BME280_POWERMODE_FORCED, &dev); + if (rslt != BME280_OK) { + return rslt; + } + + // check the status + rslt = bme280_get_regs(BME280_REG_STATUS, &status_reg, 1, &dev); + if (rslt != BME280_OK) { + return rslt; + } + + if (status_reg & BME280_STATUS_MEAS_DONE) + { + /* Measurement time delay given to read sample */ + dev.delay_us(period, dev.intf_ptr); + + /* Read compensated data */ + rslt = bme280_get_sensor_data(BME280_ALL, data, &dev); + if (rslt != BME280_OK) { + return rslt; + } + } + + // adjust based on defines +#ifndef BME280_DOUBLE_ENABLE +/* + data->temperature = data->temperature / 100; + data->humidity = data->humidity / 1000; + */ + data->temperature = data->temperature; + data->humidity = data->humidity; +#endif + +#ifdef BME280_64BIT_ENABLE + data->pressure = data->pressure / 100; +#endif + + return rslt; +} + +size_t BME280Measure(uint8_t *data, SysTime_t ts, uint32_t idx) { + // read sensor + BME280Data sens_data; + BME280Status status = BME280MeasureAll(&sens_data); + if (status != BME280_STATUS_OK) { + return -1; + } + + const UserConfiguration* cfg = UserConfigGet(); + + // metadata + Metadata meta = Metadata_init_zero; + meta.ts = ts.Seconds; + meta.logger_id = cfg->logger_id; + meta.cell_id = cfg->cell_id; + + SensorStatus sen_status = SENSOR_OK; + size_t data_len = 0; + + // pressure + sen_status = EncodeDoubleMeasurement( + meta, sens_data.pressure, SensorType_BME280_PRESSURE, data, &data_len); + if (sen_status != SENSOR_OK) { + return -1; + } + SensorsAddMeasurement(data, data_len); + + // temperature + sen_status = EncodeDoubleMeasurement( + meta, sens_data.temperature, SensorType_BME280_TEMP, data, &data_len); + if (sen_status != SENSOR_OK) { + return -1; + } + SensorsAddMeasurement(data, data_len); + + // humidity + sen_status = EncodeDoubleMeasurement( + meta, sens_data.humidity, SensorType_BME280_HUMIDITY, data, &data_len); + if (sen_status != SENSOR_OK) { + return -1; + } + + return data_len; +} \ No newline at end of file diff --git a/examples/bme280/bme280_sensor.h b/examples/bme280/bme280_sensor.h new file mode 100644 index 000000000..27e9f5e5c --- /dev/null +++ b/examples/bme280/bme280_sensor.h @@ -0,0 +1,92 @@ +/** + * @file bme280_sensor.h + * @author John Madden (jmadden173@pm.me) + * @brief Sensor interface for the BME280 sensor + * @version 0.1 + * @date 2024-05-17 + * + * @copyright Copyright (c) 2024 + * + * This is the user code file that allows for interaction with the BME280 + * sensor. It provides a function for reading each measurement and a function + * for a function that can be integrated with the sensors api. + * + * @see sensors.h + */ + +#ifndef __BME280_SENSOR_H__ +#define __BME280_SENSOR_H__ + +#include +#include + +#include "i2c.h" +#include "stm32wlxx_hal_i2c.h" +#include "stm32wlxx_hal_def.h" +#include "stm32_systime.h" + +#include "bme280.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** + * @brief Struct to store data from sensor + * + */ +typedef struct bme280_data BME280Data; + +/** + * @brief BME280 error codes + * + * The enum constants are defined to match error codes in bme280_defs.h + */ +typedef enum { + BME280_STATUS_OK = BME280_OK, + BME280_STATUS_NULL_PTR = BME280_E_NULL_PTR, + BME280_STATUS_COMM_FAIL = BME280_E_COMM_FAIL, + BME280_STATUS_INVALID_LEN = BME280_E_INVALID_LEN, + BME280_STATUS_DEV_NOT_FOUND = BME280_E_DEV_NOT_FOUND, + BME280_STATUS_SLEEP_MODE_FAIL = BME280_E_SLEEP_MODE_FAIL, + BME280_STATUS_NVM_COPY_FAILED = BME280_E_NVM_COPY_FAILED, + BME280_STATUS_ERROR = -7 +} BME280Status; + +BME280Status BME280Init(void); + +BME280Status BME280Deinit(void); + +/** + * @brief Measures temperature, pressure, and humidity + * + * If you only need a single measurement channel, take all measurements and only + * take the needed measurement. Internally all channels need to be measured to + * get the value of a single channel. + * + * @param data + * @return Status code + */ +BME280Status BME280MeasureAll(BME280Data *data); + +/** + * @brief BME280 sensor library function + * + * All three measurements (temperature, pressure, humidity) are measured and + * appropriate calibration are applied. Data gets encoded into a serialized + * measurement. + * + * @param data Buffer to store measurement + * @param ts System time of measurement + * @param idx Sensor index + * @return Length of measurement + * + * @see SensorsPrototypeMeasure + */ +size_t BME280Measure(uint8_t *data, SysTime_t ts, uint32_t idx); + +#ifdef __cplusplus +} +#endif + +#endif /* __BME280_H */ \ No newline at end of file diff --git a/examples/bme280/main.c b/examples/bme280/main.c new file mode 100644 index 000000000..a21e75564 --- /dev/null +++ b/examples/bme280/main.c @@ -0,0 +1,24 @@ +#include +#include +#include +#include "bme280_sensor.h" + + +int main(void) { + while (1) { + // Sleep + libtocksync_alarm_delay_ms(DELAY); + + BME280Data data = {}; + + BME280Status status = BME280MeasureAll(&data); + if (status != BME280_STATUS_OK) { + printf("BME280 Error, status: %d\r\n", status); + continue; + } + + printf("Pressure: %u, Temperature: %d, Humidity: %u\r\n", data.pressure, + data.temperature, data.humidity); + } +} + From a753538df7940a7252617ffd15249b102a47f9b7 Mon Sep 17 00:00:00 2001 From: hoi Date: Thu, 12 Feb 2026 16:03:58 -0800 Subject: [PATCH 2/7] minor change --- examples/bme280/bme280_sensor.c | 53 ++------------------------------- examples/bme280/bme280_sensor.h | 23 +++----------- examples/bme280/main.c | 2 +- 3 files changed, 7 insertions(+), 71 deletions(-) diff --git a/examples/bme280/bme280_sensor.c b/examples/bme280/bme280_sensor.c index 5c114c1fa..c8519ac6f 100644 --- a/examples/bme280/bme280_sensor.c +++ b/examples/bme280/bme280_sensor.c @@ -1,15 +1,11 @@ #include "bme280_sensor.h" // system includes -#include "sys_app.h" -#include "stm32_systime.h" + // user includes #include "bme280_common.h" -#include "transcoder.h" -#include "userConfig.h" -#include "sensor.h" -#include "sensors.h" + /** * @brief Required time between measurements @@ -132,48 +128,3 @@ BME280Status BME280MeasureAll(BME280Data *data) { return rslt; } - -size_t BME280Measure(uint8_t *data, SysTime_t ts, uint32_t idx) { - // read sensor - BME280Data sens_data; - BME280Status status = BME280MeasureAll(&sens_data); - if (status != BME280_STATUS_OK) { - return -1; - } - - const UserConfiguration* cfg = UserConfigGet(); - - // metadata - Metadata meta = Metadata_init_zero; - meta.ts = ts.Seconds; - meta.logger_id = cfg->logger_id; - meta.cell_id = cfg->cell_id; - - SensorStatus sen_status = SENSOR_OK; - size_t data_len = 0; - - // pressure - sen_status = EncodeDoubleMeasurement( - meta, sens_data.pressure, SensorType_BME280_PRESSURE, data, &data_len); - if (sen_status != SENSOR_OK) { - return -1; - } - SensorsAddMeasurement(data, data_len); - - // temperature - sen_status = EncodeDoubleMeasurement( - meta, sens_data.temperature, SensorType_BME280_TEMP, data, &data_len); - if (sen_status != SENSOR_OK) { - return -1; - } - SensorsAddMeasurement(data, data_len); - - // humidity - sen_status = EncodeDoubleMeasurement( - meta, sens_data.humidity, SensorType_BME280_HUMIDITY, data, &data_len); - if (sen_status != SENSOR_OK) { - return -1; - } - - return data_len; -} \ No newline at end of file diff --git a/examples/bme280/bme280_sensor.h b/examples/bme280/bme280_sensor.h index 27e9f5e5c..96d32ae4c 100644 --- a/examples/bme280/bme280_sensor.h +++ b/examples/bme280/bme280_sensor.h @@ -20,10 +20,10 @@ #include #include -#include "i2c.h" -#include "stm32wlxx_hal_i2c.h" -#include "stm32wlxx_hal_def.h" -#include "stm32_systime.h" +//#include "i2c.h" +//#include "stm32wlxx_hal_i2c.h" +//#include "stm32wlxx_hal_def.h" +//#include "stm32_systime.h" #include "bme280.h" @@ -69,21 +69,6 @@ BME280Status BME280Deinit(void); */ BME280Status BME280MeasureAll(BME280Data *data); -/** - * @brief BME280 sensor library function - * - * All three measurements (temperature, pressure, humidity) are measured and - * appropriate calibration are applied. Data gets encoded into a serialized - * measurement. - * - * @param data Buffer to store measurement - * @param ts System time of measurement - * @param idx Sensor index - * @return Length of measurement - * - * @see SensorsPrototypeMeasure - */ -size_t BME280Measure(uint8_t *data, SysTime_t ts, uint32_t idx); #ifdef __cplusplus } diff --git a/examples/bme280/main.c b/examples/bme280/main.c index a21e75564..6d695a0ce 100644 --- a/examples/bme280/main.c +++ b/examples/bme280/main.c @@ -7,7 +7,7 @@ int main(void) { while (1) { // Sleep - libtocksync_alarm_delay_ms(DELAY); + libtocksync_alarm_delay_ms(500); BME280Data data = {}; From eb7ca6d826786259f133f714dee537d617abb4ee Mon Sep 17 00:00:00 2001 From: John Madden Date: Fri, 20 Feb 2026 17:24:48 -0800 Subject: [PATCH 3/7] Debugging bme280 --- examples/bme280/bme280_sensor.c | 3 +++ examples/bme280/main.c | 22 ++++++++++++++++++++-- 2 files changed, 23 insertions(+), 2 deletions(-) diff --git a/examples/bme280/bme280_sensor.c b/examples/bme280/bme280_sensor.c index c8519ac6f..74f60ce7b 100644 --- a/examples/bme280/bme280_sensor.c +++ b/examples/bme280/bme280_sensor.c @@ -40,17 +40,20 @@ BME280Status BME280Init(void) { if (rslt != BME280_OK) { return rslt; } + //printf("pass 1"); rslt = bme280_init(&dev); if (rslt != BME280_OK) { return rslt; } + //printf("pass 2"); /* Always read the current settings before writing, especially when all the configuration is not modified */ rslt = bme280_get_sensor_settings(&settings, &dev); if (rslt != BME280_OK) { return rslt; } + //printf("pass 3"); /* Configuring the over-sampling rate, filter coefficient and standby time */ /* Overwrite the desired settings */ diff --git a/examples/bme280/main.c b/examples/bme280/main.c index 6d695a0ce..cefb1d9c6 100644 --- a/examples/bme280/main.c +++ b/examples/bme280/main.c @@ -2,16 +2,34 @@ #include #include #include "bme280_sensor.h" +#include +#include + +char hello[] = "Hello World!\r\n"; + +static void nop( + returncode_t ret __attribute__((unused)), + uint32_t bytes_written __attribute__((unused))) {} int main(void) { - while (1) { + + libtock_console_write((uint8_t*) hello, strlen(hello), nop); + // Because we used the async method (as opposed to something synchronous, + // such as printf), we must explicitly wait for the asynchronous write to complete. + yield(); + // Now we are done. + return 0; + while(1){ + }; + BME280Status status = BME280Init(); + while (1) { // Sleep libtocksync_alarm_delay_ms(500); BME280Data data = {}; - BME280Status status = BME280MeasureAll(&data); + status = BME280MeasureAll(&data); if (status != BME280_STATUS_OK) { printf("BME280 Error, status: %d\r\n", status); continue; From 8a9da8cdd6d90cfb6cafbe10825b2ea4c1e18587 Mon Sep 17 00:00:00 2001 From: hoi Date: Thu, 5 Mar 2026 17:15:32 -0800 Subject: [PATCH 4/7] minor changes --- examples/bme280/Makefile | 5 ++++- examples/bme280/bme280_common.c | 16 +++++++++++++--- examples/bme280/bme280_sensor.c | 6 +++--- examples/bme280/main.c | 9 +-------- 4 files changed, 21 insertions(+), 15 deletions(-) diff --git a/examples/bme280/Makefile b/examples/bme280/Makefile index cfe30ad8e..57796c958 100644 --- a/examples/bme280/Makefile +++ b/examples/bme280/Makefile @@ -8,4 +8,7 @@ C_SRCS := $(wildcard *.c) # Include userland master makefile. Contains rules and flags for actually # building the application. -include $(TOCK_USERLAND_BASE_DIR)/AppMakefile.mk + +override CFLAGS += -DBME280_32BIT_ENABLE + +include $(TOCK_USERLAND_BASE_DIR)/AppMakefile.mk \ No newline at end of file diff --git a/examples/bme280/bme280_common.c b/examples/bme280/bme280_common.c index a9aa4990b..8d7f41cae 100644 --- a/examples/bme280/bme280_common.c +++ b/examples/bme280/bme280_common.c @@ -38,8 +38,16 @@ BME280_INTF_RET_TYPE bme280_i2c_read(uint8_t reg_addr, uint8_t *reg_data, uint32 dev_addr = *(uint8_t*)intf_ptr; reg_data[0] = reg_addr; - int status = i2c_master_write_read_sync(dev_addr << 1, reg_data, 1, length); - + + //printf("read sync before\n"); + //int status = i2c_master_write_read_sync(dev_addr << 1, reg_data, 1, length); + int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); + status = i2c_master_read_sync(dev_addr << 1, reg_data, length); + //printf("read sync after\n"); + for (int i = 0; i < length; i++){ + printf("%d", reg_data[i]); + } + printf("\n"); if (status != 0) { return BME280_E_COMM_FAIL; @@ -51,12 +59,14 @@ BME280_INTF_RET_TYPE bme280_i2c_read(uint8_t reg_addr, uint8_t *reg_data, uint32 /*! * I2C write function map to COINES platform */ + BME280_INTF_RET_TYPE bme280_i2c_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr) { + //printf("I2C write\n"); dev_addr = *(uint8_t*)intf_ptr; int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); - + //printf("i2C write done\n"); if (status != 0) { return BME280_E_COMM_FAIL; } diff --git a/examples/bme280/bme280_sensor.c b/examples/bme280/bme280_sensor.c index 74f60ce7b..026f07ad9 100644 --- a/examples/bme280/bme280_sensor.c +++ b/examples/bme280/bme280_sensor.c @@ -40,20 +40,20 @@ BME280Status BME280Init(void) { if (rslt != BME280_OK) { return rslt; } - //printf("pass 1"); + //printf("pass 1\n"); rslt = bme280_init(&dev); if (rslt != BME280_OK) { return rslt; } - //printf("pass 2"); + //printf("pass 2\n"); /* Always read the current settings before writing, especially when all the configuration is not modified */ rslt = bme280_get_sensor_settings(&settings, &dev); if (rslt != BME280_OK) { return rslt; } - //printf("pass 3"); + //printf("pass 3\n"); /* Configuring the over-sampling rate, filter coefficient and standby time */ /* Overwrite the desired settings */ diff --git a/examples/bme280/main.c b/examples/bme280/main.c index cefb1d9c6..816ed50f0 100644 --- a/examples/bme280/main.c +++ b/examples/bme280/main.c @@ -14,14 +14,7 @@ static void nop( int main(void) { - libtock_console_write((uint8_t*) hello, strlen(hello), nop); - // Because we used the async method (as opposed to something synchronous, - // such as printf), we must explicitly wait for the asynchronous write to complete. - yield(); - // Now we are done. - return 0; - while(1){ - }; + printf("bme280\n"); BME280Status status = BME280Init(); while (1) { // Sleep From 275439d8ab8b93cfc9217313625f48d51294efc1 Mon Sep 17 00:00:00 2001 From: hoi Date: Thu, 12 Mar 2026 15:43:57 -0700 Subject: [PATCH 5/7] formatting --- examples/bme280/bme280.c | 1701 ++++++++++++++----------------- examples/bme280/bme280_common.c | 208 ++-- examples/bme280/bme280_sensor.c | 31 +- examples/bme280/main.c | 13 +- 4 files changed, 896 insertions(+), 1057 deletions(-) diff --git a/examples/bme280/bme280.c b/examples/bme280/bme280.c index 47c8d9e05..8d6af6dbd 100644 --- a/examples/bme280/bme280.c +++ b/examples/bme280/bme280.c @@ -1,40 +1,40 @@ /** -* Copyright (c) 2020 Bosch Sensortec GmbH. All rights reserved. -* -* BSD-3-Clause -* -* Redistribution and use in source and binary forms, with or without -* modification, are permitted provided that the following conditions are met: -* -* 1. Redistributions of source code must retain the above copyright -* notice, this list of conditions and the following disclaimer. -* -* 2. 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. -* -* 3. Neither the name of the copyright holder nor the names of its -* 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 THE -* 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. -* -* @file bme280.c -* @date 2020-12-17 -* @version v3.5.1 -* -*/ + * Copyright (c) 2020 Bosch Sensortec GmbH. All rights reserved. + * + * BSD-3-Clause + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * + * 2. 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. + * + * 3. Neither the name of the copyright holder nor the names of its + * 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 THE + * 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. + * + * @file bme280.c + * @date 2020-12-17 + * @version v3.5.1 + * + */ /*! @file bme280.c * @brief Sensor driver for BME280 sensor @@ -60,7 +60,7 @@ * @retval < 0 -> Fail. * */ -static int8_t put_device_to_sleep(struct bme280_dev *dev); +static int8_t put_device_to_sleep(struct bme280_dev* dev); /*! * @brief This internal API writes the power mode in the sensor. @@ -75,7 +75,7 @@ static int8_t put_device_to_sleep(struct bme280_dev *dev); * @retval < 0 -> Fail. * */ -static int8_t write_power_mode(uint8_t sensor_mode, struct bme280_dev *dev); +static int8_t write_power_mode(uint8_t sensor_mode, struct bme280_dev* dev); /*! * @brief This internal API is used to validate the device pointer for @@ -90,7 +90,7 @@ static int8_t write_power_mode(uint8_t sensor_mode, struct bme280_dev *dev); * @retval < 0 -> Fail. * */ -static int8_t null_ptr_check(const struct bme280_dev *dev); +static int8_t null_ptr_check(const struct bme280_dev* dev); /*! * @brief This internal API interleaves the register address between the @@ -104,7 +104,7 @@ static int8_t null_ptr_check(const struct bme280_dev *dev); * @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, uint32_t len); +static void interleave_reg_addr(const uint8_t* reg_addr, uint8_t* temp_buff, const uint8_t* reg_data, uint32_t len); /*! * @brief This internal API reads the calibration data from the sensor, parse @@ -119,7 +119,7 @@ static void interleave_reg_addr(const uint8_t *reg_addr, uint8_t *temp_buff, con * @retval < 0 -> Fail. * */ -static int8_t get_calib_data(struct bme280_dev *dev); +static int8_t get_calib_data(struct bme280_dev* dev); /*! * @brief This internal API is used to parse the temperature and @@ -129,7 +129,7 @@ static int8_t get_calib_data(struct bme280_dev *dev); * @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); +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 @@ -139,7 +139,7 @@ static void parse_temp_press_calib_data(const uint8_t *reg_data, struct bme280_d * @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); +static void parse_humidity_calib_data(const uint8_t* reg_data, struct bme280_dev* dev); /*! * @brief This internal API is used to identify the settings which the user @@ -171,7 +171,7 @@ static uint8_t are_settings_changed(uint8_t sub_settings, uint8_t desired_settin * @retval < 0 -> Fail. * */ -static int8_t set_osr_humidity_settings(const struct bme280_settings *settings, struct bme280_dev *dev); +static int8_t set_osr_humidity_settings(const struct bme280_settings* settings, struct bme280_dev* dev); /*! * @brief This internal API sets the oversampling settings for pressure, @@ -190,8 +190,8 @@ static int8_t set_osr_humidity_settings(const struct bme280_settings *settings, * @retval < 0 -> Fail. * */ -static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_settings *settings, - struct bme280_dev *dev); +static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_settings* settings, + struct bme280_dev* dev); /*! * @brief This API sets the pressure and/or temperature oversampling settings @@ -210,9 +210,9 @@ static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_set * @retval < 0 -> Fail. * */ -static int8_t set_osr_press_temp_settings(uint8_t desired_settings, - const struct bme280_settings *settings, - struct bme280_dev *dev); +static int8_t set_osr_press_temp_settings(uint8_t desired_settings, + const struct bme280_settings* settings, + struct bme280_dev* dev); /*! * @brief This internal API fills the pressure oversampling settings provided by @@ -224,7 +224,7 @@ static int8_t set_osr_press_temp_settings(uint8_t desired_settings, * oversampling data provided by the user. * */ -static void fill_osr_press_settings(uint8_t *reg_data, const struct bme280_settings *settings); +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 @@ -236,7 +236,7 @@ static void fill_osr_press_settings(uint8_t *reg_data, const struct bme280_setti * oversampling data provided by the user. * */ -static void fill_osr_temp_settings(uint8_t *reg_data, const struct bme280_settings *settings); +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 @@ -254,9 +254,9 @@ static void fill_osr_temp_settings(uint8_t *reg_data, const struct bme280_settin * @retval < 0 -> Fail. * */ -static int8_t set_filter_standby_settings(uint8_t desired_settings, - const struct bme280_settings *settings, - struct bme280_dev *dev); +static int8_t set_filter_standby_settings(uint8_t desired_settings, + const struct bme280_settings* settings, + struct bme280_dev* dev); /*! * @brief This internal API fills the filter settings provided by the user @@ -268,7 +268,7 @@ static int8_t set_filter_standby_settings(uint8_t desired_settings, * settings data provided by the user. * */ -static void fill_filter_settings(uint8_t *reg_data, const struct bme280_settings *settings); +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 @@ -280,7 +280,7 @@ static void fill_filter_settings(uint8_t *reg_data, const struct bme280_settings * settings data provided by the user. * */ -static void fill_standby_settings(uint8_t *reg_data, const struct bme280_settings *settings); +static void fill_standby_settings(uint8_t* reg_data, const struct bme280_settings* settings); /*! * @brief This internal API parse the oversampling(pressure, temperature @@ -292,7 +292,7 @@ static void fill_standby_settings(uint8_t *reg_data, const struct bme280_setting * @param[in] reg_data : Register data to be parsed. * */ -static void parse_device_settings(const uint8_t *reg_data, struct bme280_settings *settings); +static void parse_device_settings(const uint8_t* reg_data, struct bme280_settings* settings); /*! * @brief This API is used to parse the pressure, temperature and @@ -301,7 +301,7 @@ static void parse_device_settings(const uint8_t *reg_data, struct bme280_setting * @param[in] reg_data : Contains register data which needs to be parsed * @param[out] uncomp_data : Contains the uncompensated pressure, temperature and humidity data */ -static void parse_sensor_data(const uint8_t *reg_data, struct bme280_uncomp_data *uncomp_data); +static void parse_sensor_data(const uint8_t* reg_data, struct bme280_uncomp_data* uncomp_data); /*! * @brief This internal API reloads the already existing device settings in the @@ -318,7 +318,7 @@ static void parse_sensor_data(const uint8_t *reg_data, struct bme280_uncomp_data * @retval < 0 -> Fail. * */ -static int8_t reload_device_settings(const struct bme280_settings *settings, struct bme280_dev *dev); +static int8_t reload_device_settings(const struct bme280_settings* settings, struct bme280_dev* dev); #ifdef BME280_DOUBLE_ENABLE @@ -332,8 +332,8 @@ static int8_t reload_device_settings(const struct bme280_settings *settings, str * @return Compensated pressure data in double. * */ -static double compensate_pressure(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data); +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 @@ -345,8 +345,8 @@ static double compensate_pressure(const struct bme280_uncomp_data *uncomp_data, * @return Compensated humidity data in double. * */ -static double compensate_humidity(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data); +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 @@ -358,8 +358,8 @@ static double compensate_humidity(const struct bme280_uncomp_data *uncomp_data, * @return Compensated temperature data in double. * */ -static double compensate_temperature(const struct bme280_uncomp_data *uncomp_data, - struct bme280_calib_data *calib_data); +static double compensate_temperature(const struct bme280_uncomp_data* uncomp_data, + struct bme280_calib_data* calib_data); #else @@ -373,8 +373,8 @@ static double compensate_temperature(const struct bme280_uncomp_data *uncomp_dat * @return Compensated temperature data in integer. * */ -static int32_t compensate_temperature(const struct bme280_uncomp_data *uncomp_data, - struct bme280_calib_data *calib_data); +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 @@ -386,8 +386,8 @@ static int32_t compensate_temperature(const struct bme280_uncomp_data *uncomp_da * @return Compensated pressure data in integer. * */ -static uint32_t compensate_pressure(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data); +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 @@ -399,8 +399,8 @@ static uint32_t compensate_pressure(const struct bme280_uncomp_data *uncomp_data * @return Compensated humidity data in integer. * */ -static uint32_t compensate_humidity(const struct bme280_uncomp_data *uncomp_data, - const struct bme280_calib_data *calib_data); +static uint32_t compensate_humidity(const struct bme280_uncomp_data* uncomp_data, + const struct bme280_calib_data* calib_data); #endif @@ -410,301 +410,251 @@ static uint32_t compensate_humidity(const struct bme280_uncomp_data *uncomp_data * @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; - uint8_t chip_id = 0; - - /* Read the chip-id of bme280 sensor */ - rslt = bme280_get_regs(BME280_REG_CHIP_ID, &chip_id, 1, dev); - - /* Check for chip id validity */ - if (rslt == BME280_OK) - { - if (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); - } - } - else - { - rslt = BME280_E_DEV_NOT_FOUND; - } +int8_t bme280_init(struct bme280_dev* dev) { + int8_t rslt; + uint8_t chip_id = 0; + + /* Read the chip-id of bme280 sensor */ + rslt = bme280_get_regs(BME280_REG_CHIP_ID, &chip_id, 1, dev); + + /* Check for chip id validity */ + if (rslt == BME280_OK) { + if (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); + } + } else { + rslt = BME280_E_DEV_NOT_FOUND; } + } - return rslt; + 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, uint32_t len, struct bme280_dev *dev) -{ - int8_t rslt; +int8_t bme280_get_regs(uint8_t reg_addr, uint8_t* reg_data, uint32_t len, struct bme280_dev* dev) { + int8_t rslt; - /* Check for null pointer in the device structure */ - rslt = null_ptr_check(dev); + /* Check for null pointer in the device structure */ + rslt = null_ptr_check(dev); - if ((rslt == BME280_OK) && (reg_data != NULL)) - { - /* If interface selected is SPI */ - if (dev->intf != BME280_I2C_INTF) - { - reg_addr = reg_addr | 0x80; - } + if ((rslt == BME280_OK) && (reg_data != NULL)) { + /* If interface selected is SPI */ + if (dev->intf != BME280_I2C_INTF) { + reg_addr = reg_addr | 0x80; + } - /* Read the data */ - dev->intf_rslt = dev->read(reg_addr, reg_data, len, dev->intf_ptr); + /* Read the data */ + dev->intf_rslt = dev->read(reg_addr, reg_data, len, dev->intf_ptr); - /* Check for communication error */ - if (dev->intf_rslt != BME280_INTF_RET_SUCCESS) - { - rslt = BME280_E_COMM_FAIL; - } - } - else - { - rslt = BME280_E_NULL_PTR; + /* Check for communication error */ + if (dev->intf_rslt != BME280_INTF_RET_SUCCESS) { + rslt = BME280_E_COMM_FAIL; } + } else { + rslt = BME280_E_NULL_PTR; + } - return rslt; + 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, uint32_t len, struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t temp_buff[20]; /* Typically not to write more than 10 registers */ - uint32_t temp_len; - uint32_t reg_addr_cnt; - - if (len > BME280_MAX_LEN) - { - len = BME280_MAX_LEN; - } - - /* 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; - } - - dev->intf_rslt = dev->write(reg_addr[0], temp_buff, temp_len, dev->intf_ptr); - - /* Check for communication error */ - if (dev->intf_rslt != BME280_INTF_RET_SUCCESS) - { - rslt = BME280_E_COMM_FAIL; - } +int8_t bme280_set_regs(uint8_t* reg_addr, const uint8_t* reg_data, uint32_t len, struct bme280_dev* dev) { + int8_t rslt; + uint8_t temp_buff[20]; /* Typically not to write more than 10 registers */ + uint32_t temp_len; + uint32_t reg_addr_cnt; + + if (len > BME280_MAX_LEN) { + len = BME280_MAX_LEN; + } + + /* 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; } - else - { - rslt = BME280_E_INVALID_LEN; - } - } - else - { - rslt = BME280_E_NULL_PTR; + } + + /* 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; + } + + dev->intf_rslt = dev->write(reg_addr[0], temp_buff, temp_len, dev->intf_ptr); + + /* Check for communication error */ + if (dev->intf_rslt != BME280_INTF_RET_SUCCESS) { + rslt = BME280_E_COMM_FAIL; + } + } else { + rslt = BME280_E_INVALID_LEN; } + } else { + rslt = BME280_E_NULL_PTR; + } - return rslt; + 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_settings *settings, - struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t sensor_mode; - - if (settings != NULL) - { - rslt = bme280_get_sensor_mode(&sensor_mode, dev); +int8_t bme280_set_sensor_settings(uint8_t desired_settings, + const struct bme280_settings* settings, + struct bme280_dev* dev) { + int8_t rslt; + uint8_t sensor_mode; - if ((rslt == BME280_OK) && (sensor_mode != BME280_POWERMODE_SLEEP)) - { - rslt = put_device_to_sleep(dev); - } + if (settings != NULL) { + rslt = bme280_get_sensor_mode(&sensor_mode, 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, 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, settings, dev); - } - } + if ((rslt == BME280_OK) && (sensor_mode != BME280_POWERMODE_SLEEP)) { + rslt = put_device_to_sleep(dev); } - else - { - rslt = BME280_E_NULL_PTR; + + 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, 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, settings, dev); + } } + } else { + rslt = BME280_E_NULL_PTR; + } - return rslt; + 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_settings *settings, struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_data[4]; +int8_t bme280_get_sensor_settings(struct bme280_settings* settings, struct bme280_dev* dev) { + int8_t rslt; + uint8_t reg_data[4]; - if (settings != NULL) - { - rslt = bme280_get_regs(BME280_REG_CTRL_HUM, reg_data, 4, dev); + if (settings != NULL) { + rslt = bme280_get_regs(BME280_REG_CTRL_HUM, reg_data, 4, dev); - if (rslt == BME280_OK) - { - parse_device_settings(reg_data, settings); - } - } - else - { - rslt = BME280_E_NULL_PTR; + if (rslt == BME280_OK) { + parse_device_settings(reg_data, settings); } + } else { + rslt = BME280_E_NULL_PTR; + } - return rslt; + return rslt; } /*! * @brief This API sets the power mode of the sensor. */ -int8_t bme280_set_sensor_mode(uint8_t sensor_mode, struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t last_set_mode; +int8_t bme280_set_sensor_mode(uint8_t sensor_mode, struct bme280_dev* dev) { + int8_t rslt; + uint8_t last_set_mode; - rslt = bme280_get_sensor_mode(&last_set_mode, dev); + 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_POWERMODE_SLEEP)) - { - rslt = put_device_to_sleep(dev); - } + /* If the sensor is not in sleep mode put the device to sleep + * mode + */ + if ((rslt == BME280_OK) && (last_set_mode != BME280_POWERMODE_SLEEP)) { + rslt = put_device_to_sleep(dev); + } - /* Set the power mode */ - if (rslt == BME280_OK) - { - rslt = write_power_mode(sensor_mode, dev); - } + /* Set the power mode */ + if (rslt == BME280_OK) { + rslt = write_power_mode(sensor_mode, dev); + } - return rslt; + return rslt; } /*! * @brief This API gets the power mode of the sensor. */ -int8_t bme280_get_sensor_mode(uint8_t *sensor_mode, struct bme280_dev *dev) -{ - int8_t rslt; +int8_t bme280_get_sensor_mode(uint8_t* sensor_mode, struct bme280_dev* dev) { + int8_t rslt; - if (sensor_mode != NULL) - { - /* Read the power mode register */ - rslt = bme280_get_regs(BME280_REG_PWR_CTRL, sensor_mode, 1, dev); + if (sensor_mode != NULL) { + /* Read the power mode register */ + rslt = bme280_get_regs(BME280_REG_PWR_CTRL, sensor_mode, 1, dev); - /* Assign the power mode to variable */ - *sensor_mode = BME280_GET_BITS_POS_0(*sensor_mode, BME280_SENSOR_MODE); - } - else - { - rslt = BME280_E_NULL_PTR; - } + /* Assign the power mode to variable */ + *sensor_mode = BME280_GET_BITS_POS_0(*sensor_mode, BME280_SENSOR_MODE); + } else { + rslt = BME280_E_NULL_PTR; + } - return rslt; + return rslt; } /*! * @brief This API performs the soft reset of the sensor. */ -int8_t bme280_soft_reset(struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_REG_RESET; - uint8_t status_reg = 0; - uint8_t try_run = 5; +int8_t bme280_soft_reset(struct bme280_dev* dev) { + int8_t rslt; + uint8_t reg_addr = BME280_REG_RESET; + uint8_t status_reg = 0; + uint8_t try_run = 5; - /* 0xB6 is the soft reset command */ - uint8_t soft_rst_cmd = BME280_SOFT_RESET_COMMAND; + /* 0xB6 is the soft reset command */ + uint8_t soft_rst_cmd = BME280_SOFT_RESET_COMMAND; - /* Write the soft reset command in the sensor */ - rslt = bme280_set_regs(®_addr, &soft_rst_cmd, 1, dev); + /* Write the soft reset command in the sensor */ + rslt = bme280_set_regs(®_addr, &soft_rst_cmd, 1, dev); - if (rslt == BME280_OK) + if (rslt == BME280_OK) { + /* If NVM not copied yet, Wait for NVM to copy */ + do { - /* If NVM not copied yet, Wait for NVM to copy */ - do - { - /* As per data sheet - Table 1, startup time is 2 ms. */ - dev->delay_us(BME280_STARTUP_DELAY, dev->intf_ptr); - rslt = bme280_get_regs(BME280_REG_STATUS, &status_reg, 1, dev); - - } while ((rslt == BME280_OK) && (try_run--) && (status_reg & BME280_STATUS_IM_UPDATE)); - - if (status_reg & BME280_STATUS_IM_UPDATE) - { - rslt = BME280_E_NVM_COPY_FAILED; - } + /* As per data sheet - Table 1, startup time is 2 ms. */ + dev->delay_us(BME280_STARTUP_DELAY, dev->intf_ptr); + rslt = bme280_get_regs(BME280_REG_STATUS, &status_reg, 1, dev); + } while ((rslt == BME280_OK) && (try_run--) && (status_reg & BME280_STATUS_IM_UPDATE)); + + if (status_reg & BME280_STATUS_IM_UPDATE) { + rslt = BME280_E_NVM_COPY_FAILED; } + } - return rslt; + return rslt; } /*! @@ -712,38 +662,33 @@ int8_t bme280_soft_reset(struct bme280_dev *dev) * 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_LEN_P_T_H_DATA] = { 0 }; - struct bme280_uncomp_data uncomp_data = { 0 }; - - if (comp_data != NULL) - { - /* Read the pressure and temperature data from the sensor */ - rslt = bme280_get_regs(BME280_REG_DATA, reg_data, BME280_LEN_P_T_H_DATA, dev); - - if (rslt == BME280_OK) - { - /* Parse the read data from the sensor */ - 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; +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_LEN_P_T_H_DATA] = { 0 }; + struct bme280_uncomp_data uncomp_data = { 0 }; + + if (comp_data != NULL) { + /* Read the pressure and temperature data from the sensor */ + rslt = bme280_get_regs(BME280_REG_DATA, reg_data, BME280_LEN_P_T_H_DATA, dev); + + if (rslt == BME280_OK) { + /* Parse the read data from the sensor */ + 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; + return rslt; } /*! @@ -751,102 +696,82 @@ int8_t bme280_get_sensor_data(uint8_t sensor_comp, struct bme280_data *comp_data * 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); - } +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_HUM) - { - /* Compensate the humidity data */ - comp_data->humidity = compensate_humidity(uncomp_data, calib_data); - } + if (sensor_comp & BME280_PRESS) { + /* Compensate the pressure data */ + comp_data->pressure = compensate_pressure(uncomp_data, calib_data); } - else - { - rslt = BME280_E_NULL_PTR; + + 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; + return rslt; } /*! * @brief This API is used to calculate the maximum delay in milliseconds required for the * temperature/pressure/humidity(whichever are enabled) measurement to complete. */ -int8_t bme280_cal_meas_delay(uint32_t *max_delay, const struct bme280_settings *settings) -{ - int8_t rslt = BME280_OK; - uint8_t temp_osr; - uint8_t pres_osr; - uint8_t hum_osr; - - /* Array to map OSR config register value to actual OSR */ - uint8_t osr_sett_to_act_osr[] = { 0, 1, 2, 4, 8, 16 }; - - if ((settings != NULL) && (max_delay != NULL)) - { - /* Mapping osr settings to the actual osr values e.g. 0b101 -> osr X16 */ - if (settings->osr_t <= BME280_OVERSAMPLING_16X) - { - temp_osr = osr_sett_to_act_osr[settings->osr_t]; - } - else - { - temp_osr = BME280_OVERSAMPLING_MAX; - } - - if (settings->osr_p <= BME280_OVERSAMPLING_16X) - { - pres_osr = osr_sett_to_act_osr[settings->osr_p]; - } - else - { - pres_osr = BME280_OVERSAMPLING_MAX; - } - - if (settings->osr_h <= BME280_OVERSAMPLING_16X) - { - hum_osr = osr_sett_to_act_osr[settings->osr_h]; - } - else - { - hum_osr = BME280_OVERSAMPLING_MAX; - } +int8_t bme280_cal_meas_delay(uint32_t* max_delay, const struct bme280_settings* settings) { + int8_t rslt = BME280_OK; + uint8_t temp_osr; + uint8_t pres_osr; + uint8_t hum_osr; + + /* Array to map OSR config register value to actual OSR */ + uint8_t osr_sett_to_act_osr[] = { 0, 1, 2, 4, 8, 16 }; + + if ((settings != NULL) && (max_delay != NULL)) { + /* Mapping osr settings to the actual osr values e.g. 0b101 -> osr X16 */ + if (settings->osr_t <= BME280_OVERSAMPLING_16X) { + temp_osr = osr_sett_to_act_osr[settings->osr_t]; + } else { + temp_osr = BME280_OVERSAMPLING_MAX; + } - (*max_delay) = - (uint32_t)((BME280_MEAS_OFFSET + (BME280_MEAS_DUR * temp_osr) + - ((BME280_MEAS_DUR * pres_osr) + BME280_PRES_HUM_MEAS_OFFSET) + - ((BME280_MEAS_DUR * hum_osr) + BME280_PRES_HUM_MEAS_OFFSET))); + if (settings->osr_p <= BME280_OVERSAMPLING_16X) { + pres_osr = osr_sett_to_act_osr[settings->osr_p]; + } else { + pres_osr = BME280_OVERSAMPLING_MAX; } - else - { - rslt = BME280_E_NULL_PTR; + + if (settings->osr_h <= BME280_OVERSAMPLING_16X) { + hum_osr = osr_sett_to_act_osr[settings->osr_h]; + } else { + hum_osr = BME280_OVERSAMPLING_MAX; } - return rslt; + (*max_delay) = + (uint32_t)((BME280_MEAS_OFFSET + (BME280_MEAS_DUR * temp_osr) + + ((BME280_MEAS_DUR * pres_osr) + BME280_PRES_HUM_MEAS_OFFSET) + + ((BME280_MEAS_DUR * hum_osr) + BME280_PRES_HUM_MEAS_OFFSET))); + } else { + rslt = BME280_E_NULL_PTR; + } + + return rslt; } /****************************************************************************/ @@ -856,155 +781,138 @@ int8_t bme280_cal_meas_delay(uint32_t *max_delay, const struct bme280_settings * * @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, struct bme280_dev *dev) -{ - int8_t rslt = BME280_W_INVALID_OSR_MACRO; +static int8_t set_osr_settings(uint8_t desired_settings, const struct bme280_settings* settings, + struct bme280_dev* dev) { + int8_t rslt = BME280_W_INVALID_OSR_MACRO; - if (desired_settings & BME280_SEL_OSR_HUM) - { - rslt = set_osr_humidity_settings(settings, dev); - } + if (desired_settings & BME280_SEL_OSR_HUM) { + rslt = set_osr_humidity_settings(settings, dev); + } - if (desired_settings & (BME280_SEL_OSR_PRESS | BME280_SEL_OSR_TEMP)) - { - rslt = set_osr_press_temp_settings(desired_settings, settings, dev); - } + if (desired_settings & (BME280_SEL_OSR_PRESS | BME280_SEL_OSR_TEMP)) { + rslt = set_osr_press_temp_settings(desired_settings, settings, dev); + } - return rslt; + 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, struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t ctrl_hum; - uint8_t ctrl_meas; - uint8_t reg_addr = BME280_REG_CTRL_HUM; - - 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_REG_CTRL_MEAS; - rslt = bme280_get_regs(reg_addr, &ctrl_meas, 1, dev); - - if (rslt == BME280_OK) - { - rslt = bme280_set_regs(®_addr, &ctrl_meas, 1, dev); - } +static int8_t set_osr_humidity_settings(const struct bme280_settings* settings, struct bme280_dev* dev) { + int8_t rslt; + uint8_t ctrl_hum; + uint8_t ctrl_meas; + uint8_t reg_addr = BME280_REG_CTRL_HUM; + + 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_REG_CTRL_MEAS; + 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; + 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, - struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_REG_CTRL_MEAS; - uint8_t reg_data; - - rslt = bme280_get_regs(reg_addr, ®_data, 1, dev); - - if (rslt == BME280_OK) - { - if (desired_settings & BME280_SEL_OSR_PRESS) - { - fill_osr_press_settings(®_data, settings); - } - - if (desired_settings & BME280_SEL_OSR_TEMP) - { - fill_osr_temp_settings(®_data, settings); - } +static int8_t set_osr_press_temp_settings(uint8_t desired_settings, + const struct bme280_settings* settings, + struct bme280_dev* dev) { + int8_t rslt; + uint8_t reg_addr = BME280_REG_CTRL_MEAS; + uint8_t reg_data; + + rslt = bme280_get_regs(reg_addr, ®_data, 1, dev); + + if (rslt == BME280_OK) { + if (desired_settings & BME280_SEL_OSR_PRESS) { + fill_osr_press_settings(®_data, settings); + } - /* Write the oversampling settings in the register */ - rslt = bme280_set_regs(®_addr, ®_data, 1, dev); + if (desired_settings & BME280_SEL_OSR_TEMP) { + fill_osr_temp_settings(®_data, settings); } - return rslt; + /* 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, - struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_REG_CONFIG; - uint8_t reg_data; - - rslt = bme280_get_regs(reg_addr, ®_data, 1, dev); - - if (rslt == BME280_OK) - { - if (desired_settings & BME280_SEL_FILTER) - { - fill_filter_settings(®_data, settings); - } - - if (desired_settings & BME280_SEL_STANDBY) - { - fill_standby_settings(®_data, settings); - } +static int8_t set_filter_standby_settings(uint8_t desired_settings, + const struct bme280_settings* settings, + struct bme280_dev* dev) { + int8_t rslt; + uint8_t reg_addr = BME280_REG_CONFIG; + uint8_t reg_data; + + rslt = bme280_get_regs(reg_addr, ®_data, 1, dev); + + if (rslt == BME280_OK) { + if (desired_settings & BME280_SEL_FILTER) { + fill_filter_settings(®_data, settings); + } - /* Write the oversampling settings in the register */ - rslt = bme280_set_regs(®_addr, ®_data, 1, dev); + if (desired_settings & BME280_SEL_STANDBY) { + fill_standby_settings(®_data, settings); } - return rslt; + /* 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); +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); +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); +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); +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); } /*! @@ -1012,111 +920,102 @@ static void fill_osr_temp_settings(uint8_t *reg_data, const struct bme280_settin * and humidity), filter and standby duration settings and store in the * bme280_settings 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); +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 API is used to parse the pressure, temperature and * humidity data and store it in the bme280_uncomp_data structure instance. */ -static void 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] << BME280_12_BIT_SHIFT; - data_lsb = (uint32_t)reg_data[1] << BME280_4_BIT_SHIFT; - data_xlsb = (uint32_t)reg_data[2] >> BME280_4_BIT_SHIFT; - uncomp_data->pressure = data_msb | data_lsb | data_xlsb; - - /* Store the parsed register values for temperature data */ - data_msb = (uint32_t)reg_data[3] << BME280_12_BIT_SHIFT; - data_lsb = (uint32_t)reg_data[4] << BME280_4_BIT_SHIFT; - data_xlsb = (uint32_t)reg_data[5] >> BME280_4_BIT_SHIFT; - uncomp_data->temperature = data_msb | data_lsb | data_xlsb; - - /* Store the parsed register values for humidity data */ - data_msb = (uint32_t)reg_data[6] << BME280_8_BIT_SHIFT; - data_lsb = (uint32_t)reg_data[7]; - uncomp_data->humidity = data_msb | data_lsb; +static void 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] << BME280_12_BIT_SHIFT; + data_lsb = (uint32_t)reg_data[1] << BME280_4_BIT_SHIFT; + data_xlsb = (uint32_t)reg_data[2] >> BME280_4_BIT_SHIFT; + uncomp_data->pressure = data_msb | data_lsb | data_xlsb; + + /* Store the parsed register values for temperature data */ + data_msb = (uint32_t)reg_data[3] << BME280_12_BIT_SHIFT; + data_lsb = (uint32_t)reg_data[4] << BME280_4_BIT_SHIFT; + data_xlsb = (uint32_t)reg_data[5] >> BME280_4_BIT_SHIFT; + uncomp_data->temperature = data_msb | data_lsb | data_xlsb; + + /* Store the parsed register values for humidity data */ + data_msb = (uint32_t)reg_data[6] << BME280_8_BIT_SHIFT; + data_lsb = (uint32_t)reg_data[7]; + uncomp_data->humidity = data_msb | data_lsb; } /*! * @brief This internal API writes the power mode in the sensor. */ -static int8_t write_power_mode(uint8_t sensor_mode, struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME280_REG_PWR_CTRL; +static int8_t write_power_mode(uint8_t sensor_mode, struct bme280_dev* dev) { + int8_t rslt; + uint8_t reg_addr = BME280_REG_PWR_CTRL; - /* Variable to store the value read from power mode register */ - uint8_t sensor_mode_reg_val; + /* 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); + /* 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); + /* 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); - } + /* Write the power mode in the register */ + rslt = bme280_set_regs(®_addr, &sensor_mode_reg_val, 1, dev); + } - return rslt; + return rslt; } /*! * @brief This internal API puts the device to sleep mode. */ -static int8_t put_device_to_sleep(struct bme280_dev *dev) -{ - int8_t rslt; - uint8_t reg_data[4]; - struct bme280_settings settings; +static int8_t put_device_to_sleep(struct bme280_dev* dev) { + int8_t rslt; + uint8_t reg_data[4]; + struct bme280_settings settings; - rslt = bme280_get_regs(BME280_REG_CTRL_HUM, reg_data, 4, dev); + rslt = bme280_get_regs(BME280_REG_CTRL_HUM, reg_data, 4, dev); - if (rslt == BME280_OK) - { - parse_device_settings(reg_data, &settings); - rslt = bme280_soft_reset(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); - } + if (rslt == BME280_OK) { + rslt = reload_device_settings(&settings, dev); } + } - return rslt; + 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, struct bme280_dev *dev) -{ - int8_t rslt; +static int8_t reload_device_settings(const struct bme280_settings* settings, struct bme280_dev* dev) { + int8_t rslt; - rslt = set_osr_settings(BME280_SEL_ALL_SETTINGS, settings, dev); + rslt = set_osr_settings(BME280_SEL_ALL_SETTINGS, settings, dev); - if (rslt == BME280_OK) - { - rslt = set_filter_standby_settings(BME280_SEL_ALL_SETTINGS, settings, dev); - } + if (rslt == BME280_OK) { + rslt = set_filter_standby_settings(BME280_SEL_ALL_SETTINGS, settings, dev); + } - return rslt; + return rslt; } #ifdef BME280_DOUBLE_ENABLE @@ -1125,117 +1024,103 @@ static int8_t reload_device_settings(const struct bme280_settings *settings, str * @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; +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 > (0.0)) - { - 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; +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 > (0.0)) { + 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; + 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; +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 @@ -1244,33 +1129,30 @@ static double compensate_humidity(const struct bme280_uncomp_data *uncomp_data, * @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; +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; } + #ifndef BME280_32BIT_ENABLE /* 64 bit compensation for pressure data */ /*! @@ -1278,294 +1160,263 @@ static int32_t compensate_temperature(const struct bme280_uncomp_data *uncomp_da * 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 * INT64_C(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; +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 * INT64_C(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; + return pressure; } + #else /* 32 bit compensation for pressure data */ /*! * @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; - } +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)); + 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; + if (pressure < pressure_min) { + pressure = pressure_min; + } else if (pressure > pressure_max) { + pressure = pressure_max; } + } else { + pressure = pressure_min; + } - return pressure; + 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; +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_REG_TEMP_PRESS_CALIB_DATA; +static int8_t get_calib_data(struct bme280_dev* dev) { + int8_t rslt; + uint8_t reg_addr = BME280_REG_TEMP_PRESS_CALIB_DATA; - /* Array to store calibration data */ - uint8_t calib_data[BME280_LEN_TEMP_PRESS_CALIB_DATA] = { 0 }; + /* Array to store calibration data */ + uint8_t calib_data[BME280_LEN_TEMP_PRESS_CALIB_DATA] = { 0 }; - /* Read the calibration data from the sensor */ - rslt = bme280_get_regs(reg_addr, calib_data, BME280_LEN_TEMP_PRESS_CALIB_DATA, dev); + /* Read the calibration data from the sensor */ + rslt = bme280_get_regs(reg_addr, calib_data, BME280_LEN_TEMP_PRESS_CALIB_DATA, 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_REG_HUMIDITY_CALIB_DATA; - - /* Read the humidity calibration data from the sensor */ - rslt = bme280_get_regs(reg_addr, calib_data, BME280_LEN_HUMIDITY_CALIB_DATA, dev); - - if (rslt == BME280_OK) - { - /* Parse humidity calibration data and store it in - * device structure - */ - parse_humidity_calib_data(calib_data, 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_REG_HUMIDITY_CALIB_DATA; + + /* Read the humidity calibration data from the sensor */ + rslt = bme280_get_regs(reg_addr, calib_data, BME280_LEN_HUMIDITY_CALIB_DATA, dev); + + if (rslt == BME280_OK) { + /* Parse humidity calibration data and store it in + * device structure + */ + parse_humidity_calib_data(calib_data, dev); } + } - return rslt; + 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, uint32_t len) -{ - uint32_t index; +static void interleave_reg_addr(const uint8_t* reg_addr, uint8_t* temp_buff, const uint8_t* reg_data, uint32_t len) { + uint32_t index; - for (index = 1; index < len; index++) - { - temp_buff[(index * 2) - 1] = reg_addr[index]; - temp_buff[index * 2] = reg_data[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]; +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]; +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; +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_us == NULL)) - { - /* Device structure pointer is not valid */ - rslt = BME280_E_NULL_PTR; - } - else - { - /* Device structure is fine */ - rslt = BME280_OK; - } - - return rslt; -} \ No newline at end of file +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_us == 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/examples/bme280/bme280_common.c b/examples/bme280/bme280_common.c index 8d7f41cae..34f78c732 100644 --- a/examples/bme280/bme280_common.c +++ b/examples/bme280/bme280_common.c @@ -5,10 +5,11 @@ */ #include -#include #include -#include +#include + #include +#include #include "bme280.h" #include "bme280_common.h" @@ -33,142 +34,129 @@ static uint8_t dev_addr; /*! * I2C read function map to COINES platform */ -BME280_INTF_RET_TYPE bme280_i2c_read(uint8_t reg_addr, uint8_t *reg_data, uint32_t length, void *intf_ptr) -{ - dev_addr = *(uint8_t*)intf_ptr; - reg_data[0] = reg_addr; - - - //printf("read sync before\n"); - //int status = i2c_master_write_read_sync(dev_addr << 1, reg_data, 1, length); - int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); - status = i2c_master_read_sync(dev_addr << 1, reg_data, length); - //printf("read sync after\n"); - for (int i = 0; i < length; i++){ - printf("%d", reg_data[i]); - } - printf("\n"); - - if (status != 0) { - return BME280_E_COMM_FAIL; - } - - return BME280_OK; +BME280_INTF_RET_TYPE bme280_i2c_read(uint8_t reg_addr, uint8_t* reg_data, uint32_t length, void* intf_ptr) { + dev_addr = *(uint8_t*)intf_ptr; + reg_data[0] = reg_addr; + + // printf("read sync before\n"); + // int status = i2c_master_write_read_sync(dev_addr << 1, reg_data, 1, length); + int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); + status = i2c_master_read_sync(dev_addr << 1, reg_data, length); + // printf("read sync after\n"); + for (int i = 0; i < length; i++) { + printf("%d", reg_data[i]); + } + printf("\n"); + + if (status != 0) { + return BME280_E_COMM_FAIL; + } + + return BME280_OK; } /*! * I2C write function map to COINES platform */ -BME280_INTF_RET_TYPE bme280_i2c_write(uint8_t reg_addr, const uint8_t *reg_data, uint32_t length, void *intf_ptr) -{ - //printf("I2C write\n"); - dev_addr = *(uint8_t*)intf_ptr; +BME280_INTF_RET_TYPE bme280_i2c_write(uint8_t reg_addr, const uint8_t* reg_data, uint32_t length, void* intf_ptr) { + // printf("I2C write\n"); + dev_addr = *(uint8_t*)intf_ptr; - int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); - //printf("i2C write done\n"); - if (status != 0) { - return BME280_E_COMM_FAIL; - } + int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); + // printf("i2C write done\n"); + if (status != 0) { + return BME280_E_COMM_FAIL; + } - status = i2c_master_write_sync(dev_addr << 1, (uint8_t *) reg_data, length); + status = i2c_master_write_sync(dev_addr << 1, (uint8_t*) reg_data, length); - if (status != 0) { - return BME280_E_COMM_FAIL; - } + if (status != 0) { + return BME280_E_COMM_FAIL; + } - return BME280_OK; + return BME280_OK; } - /*! * Delay function map to COINES platform */ -void bme280_delay_us(uint32_t period, void *intf_ptr) -{ - // calculate us to ms - uint32_t period_ms = period / 1000; - - // if no period then set to 1 to ensure delay - if (period_ms == 0) { - period_ms = 1; - } +void bme280_delay_us(uint32_t period, void* intf_ptr) { + // calculate us to ms + uint32_t period_ms = period / 1000; - // delay - libtocksync_alarm_delay_ms(period_ms); + // if no period then set to 1 to ensure delay + if (period_ms == 0) { + period_ms = 1; + } + + // delay + libtocksync_alarm_delay_ms(period_ms); } /*! * @brief Prints the execution status of the APIs. */ -void bme280_error_codes_print_result(const char api_name[], int8_t rslt) -{ - if (rslt != BME280_OK) - { - printf("%s\t", api_name); - - switch (rslt) - { - case BME280_E_NULL_PTR: - printf("Error [%d] : Null pointer error.", rslt); - printf("It occurs when the user tries to assign value (not address) to a pointer, which has been initialized to NULL.\r\n"); - break; - - case BME280_E_COMM_FAIL: - printf("Error [%d] : Communication failure error.", rslt); - printf("It occurs due to read/write operation failure and also due to power failure during communication\r\n"); - break; - - case BME280_E_DEV_NOT_FOUND: - printf("Error [%d] : Device not found error. It occurs when the device chip id is incorrectly read\r\n", - rslt); - break; - - case BME280_E_INVALID_LEN: - printf("Error [%d] : Invalid length error. It occurs when write is done with invalid length\r\n", rslt); - break; - - default: - printf("Error [%d] : Unknown error code\r\n", rslt); - break; - } +void bme280_error_codes_print_result(const char api_name[], int8_t rslt) { + if (rslt != BME280_OK) { + printf("%s\t", api_name); + + switch (rslt) { + case BME280_E_NULL_PTR: + printf("Error [%d] : Null pointer error.", rslt); + printf( + "It occurs when the user tries to assign value (not address) to a pointer, which has been initialized to NULL.\r\n"); + break; + + case BME280_E_COMM_FAIL: + printf("Error [%d] : Communication failure error.", rslt); + printf("It occurs due to read/write operation failure and also due to power failure during communication\r\n"); + break; + + case BME280_E_DEV_NOT_FOUND: + printf("Error [%d] : Device not found error. It occurs when the device chip id is incorrectly read\r\n", + rslt); + break; + + case BME280_E_INVALID_LEN: + printf("Error [%d] : Invalid length error. It occurs when write is done with invalid length\r\n", rslt); + break; + + default: + printf("Error [%d] : Unknown error code\r\n", rslt); + break; } + } } /*! * @brief Function to select the interface between SPI and I2C. */ -int8_t bme280_interface_selection(struct bme280_dev *dev, uint8_t intf) -{ - int8_t rslt = BME280_OK; - - if (dev != NULL) - { - /* Bus configuration : I2C */ - if (intf == BME280_I2C_INTF) - { - dev_addr = BME280_I2C_ADDR_SEC; - dev->read = bme280_i2c_read; - dev->write = bme280_i2c_write; - dev->intf = BME280_I2C_INTF; - } - /* Bus configuration : SPI */ - else if (intf == BME280_SPI_INTF) - { - rslt = BME280_E_DEV_NOT_FOUND; - } - - /* Holds the I2C device addr or SPI chip selection */ - dev->intf_ptr = &dev_addr; - - /* Configure delay in microseconds */ - dev->delay_us = bme280_delay_us; +int8_t bme280_interface_selection(struct bme280_dev* dev, uint8_t intf) { + int8_t rslt = BME280_OK; + + if (dev != NULL) { + /* Bus configuration : I2C */ + if (intf == BME280_I2C_INTF) { + dev_addr = BME280_I2C_ADDR_SEC; + dev->read = bme280_i2c_read; + dev->write = bme280_i2c_write; + dev->intf = BME280_I2C_INTF; } - else - { - rslt = BME280_E_NULL_PTR; + /* Bus configuration : SPI */ + else if (intf == BME280_SPI_INTF) { + rslt = BME280_E_DEV_NOT_FOUND; } - return rslt; -} \ No newline at end of file + /* Holds the I2C device addr or SPI chip selection */ + dev->intf_ptr = &dev_addr; + + /* Configure delay in microseconds */ + dev->delay_us = bme280_delay_us; + } else { + rslt = BME280_E_NULL_PTR; + } + + return rslt; +} diff --git a/examples/bme280/bme280_sensor.c b/examples/bme280/bme280_sensor.c index 026f07ad9..600b8cdef 100644 --- a/examples/bme280/bme280_sensor.c +++ b/examples/bme280/bme280_sensor.c @@ -9,21 +9,21 @@ /** * @brief Required time between measurements - * + * * @see BME280Init */ static uint32_t period = 0; /** * @brief Device definition - * + * * @see BME280Init */ static struct bme280_dev dev; /** * @brief Device settings - * + * * @see BME280Init */ static struct bme280_settings settings; @@ -40,20 +40,20 @@ BME280Status BME280Init(void) { if (rslt != BME280_OK) { return rslt; } - //printf("pass 1\n"); + // printf("pass 1\n"); rslt = bme280_init(&dev); if (rslt != BME280_OK) { return rslt; } - //printf("pass 2\n"); + // printf("pass 2\n"); /* Always read the current settings before writing, especially when all the configuration is not modified */ rslt = bme280_get_sensor_settings(&settings, &dev); if (rslt != BME280_OK) { return rslt; } - //printf("pass 3\n"); + // printf("pass 3\n"); /* Configuring the over-sampling rate, filter coefficient and standby time */ /* Overwrite the desired settings */ @@ -87,10 +87,10 @@ BME280Status BME280Init(void) { return rslt; } -BME280Status BME280MeasureAll(BME280Data *data) { +BME280Status BME280MeasureAll(BME280Data* data) { int8_t rslt = BME280_E_NULL_PTR; uint8_t status_reg; - + // trigger measurement rslt = bme280_set_sensor_mode(BME280_POWERMODE_FORCED, &dev); if (rslt != BME280_OK) { @@ -103,8 +103,7 @@ BME280Status BME280MeasureAll(BME280Data *data) { return rslt; } - if (status_reg & BME280_STATUS_MEAS_DONE) - { + if (status_reg & BME280_STATUS_MEAS_DONE) { /* Measurement time delay given to read sample */ dev.delay_us(period, dev.intf_ptr); @@ -118,14 +117,14 @@ BME280Status BME280MeasureAll(BME280Data *data) { // adjust based on defines #ifndef BME280_DOUBLE_ENABLE /* - data->temperature = data->temperature / 100; - data->humidity = data->humidity / 1000; - */ + data->temperature = data->temperature / 100; + data->humidity = data->humidity / 1000; + */ data->temperature = data->temperature; - data->humidity = data->humidity; + data->humidity = data->humidity; #endif - -#ifdef BME280_64BIT_ENABLE + +#ifdef BME280_64BIT_ENABLE data->pressure = data->pressure / 100; #endif diff --git a/examples/bme280/main.c b/examples/bme280/main.c index 816ed50f0..120d42fe9 100644 --- a/examples/bme280/main.c +++ b/examples/bme280/main.c @@ -1,9 +1,11 @@ -#include -#include #include -#include "bme280_sensor.h" #include + +#include #include +#include + +#include "bme280_sensor.h" char hello[] = "Hello World!\r\n"; @@ -13,7 +15,7 @@ static void nop( int main(void) { - + printf("bme280\n"); BME280Status status = BME280Init(); while (1) { @@ -29,7 +31,6 @@ int main(void) { } printf("Pressure: %u, Temperature: %d, Humidity: %u\r\n", data.pressure, - data.temperature, data.humidity); + data.temperature, data.humidity); } } - From a58bbf9c203d70f10a9d2c3ec36a70200f4f5e47 Mon Sep 17 00:00:00 2001 From: hoi Date: Thu, 12 Mar 2026 16:29:01 -0700 Subject: [PATCH 6/7] changes --- examples/bme280/bme280_common.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/examples/bme280/bme280_common.c b/examples/bme280/bme280_common.c index 34f78c732..5df0f0107 100644 --- a/examples/bme280/bme280_common.c +++ b/examples/bme280/bme280_common.c @@ -43,7 +43,7 @@ BME280_INTF_RET_TYPE bme280_i2c_read(uint8_t reg_addr, uint8_t* reg_data, uint32 int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); status = i2c_master_read_sync(dev_addr << 1, reg_data, length); // printf("read sync after\n"); - for (int i = 0; i < length; i++) { + for (uint32_tt i = 0; i < length; i++) { printf("%d", reg_data[i]); } printf("\n"); @@ -83,6 +83,8 @@ BME280_INTF_RET_TYPE bme280_i2c_write(uint8_t reg_addr, const uint8_t* reg_data, * Delay function map to COINES platform */ void bme280_delay_us(uint32_t period, void* intf_ptr) { + + (void)intf_ptr; // calculate us to ms uint32_t period_ms = period / 1000; From fb81f12e4fc64eb43b9f5a51710633d1d9421230 Mon Sep 17 00:00:00 2001 From: hoi Date: Thu, 12 Mar 2026 16:46:19 -0700 Subject: [PATCH 7/7] minor change --- examples/bme280/bme280_common.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/examples/bme280/bme280_common.c b/examples/bme280/bme280_common.c index 5df0f0107..7f12f60c3 100644 --- a/examples/bme280/bme280_common.c +++ b/examples/bme280/bme280_common.c @@ -43,7 +43,7 @@ BME280_INTF_RET_TYPE bme280_i2c_read(uint8_t reg_addr, uint8_t* reg_data, uint32 int status = i2c_master_write_sync(dev_addr << 1, ®_addr, 1); status = i2c_master_read_sync(dev_addr << 1, reg_data, length); // printf("read sync after\n"); - for (uint32_tt i = 0; i < length; i++) { + for (uint32_t i = 0; i < length; i++) { printf("%d", reg_data[i]); } printf("\n");