From 73088989833613f9d105a7de73dd3e8fdf4d2681 Mon Sep 17 00:00:00 2001 From: Gunar Schorcht <31932013+gschorcht@users.noreply.github.com> Date: Sat, 30 Sep 2017 20:50:23 +0200 Subject: [PATCH] Delete bme680.c --- extras/bme680/bme680.c | 1105 ---------------------------------------- 1 file changed, 1105 deletions(-) delete mode 100644 extras/bme680/bme680.c diff --git a/extras/bme680/bme680.c b/extras/bme680/bme680.c deleted file mode 100644 index 1b53aa5..0000000 --- a/extras/bme680/bme680.c +++ /dev/null @@ -1,1105 +0,0 @@ -/**\mainpage - * Copyright (C) 2017 - 2018 Bosch Sensortec GmbH - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * Neither the name of the copyright holder nor the names of the - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND - * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED - * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE - * DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER - * OR CONTRIBUTORS BE LIABLE FOR ANY - * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, - * OR CONSEQUENTIAL DAMAGES(INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, - * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS - * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE - * - * The information provided is believed to be accurate and reliable. - * The copyright holder assumes no responsibility - * for the consequences of use - * of such information nor for any infringement of patents or - * other rights of third parties which may result from its use. - * No license is granted by implication or otherwise under any patent or - * patent rights of the copyright holder. - * - * File bme680.c - * @date 5 Jul 2017 - * @version 3.5.1 - * - */ - -/*! @file bme680.c - @brief Sensor driver for BME680 sensor */ -#include "bme680.h" - -/**static variables */ -/**Look up table for the possible gas range values */ -uint32_t lookupTable1[16] = { UINT32_C(2147483647), UINT32_C(2147483647), UINT32_C(2147483647), UINT32_C(2147483647), - UINT32_C(2147483647), UINT32_C(2126008810), UINT32_C(2147483647), UINT32_C(2130303777), UINT32_C(2147483647), - UINT32_C(2147483647), UINT32_C(2143188679), UINT32_C(2136746228), UINT32_C(2147483647), UINT32_C(2126008810), - UINT32_C(2147483647), UINT32_C(2147483647) }; -/**Look up table for the possible gas range values */ -uint32_t lookupTable2[16] = { UINT32_C(4096000000), UINT32_C(2048000000), UINT32_C(1024000000), UINT32_C(512000000), - UINT32_C(255744255), UINT32_C(127110228), UINT32_C(64000000), UINT32_C(32258064), UINT32_C(16016016), UINT32_C( - 8000000), UINT32_C(4000000), UINT32_C(2000000), UINT32_C(1000000), UINT32_C(500000), UINT32_C(250000), - UINT32_C(125000) }; - -/*! - * @brief This internal API is used to read the calibrated data from the sensor. - * - * This function is used to retrieve the calibration - * data from the image registers of the sensor. - * - * @note Registers 89h to A1h for calibration data 1 to 24 - * from bit 0 to 7 - * @note Registers E1h to F0h for calibration data 25 to 40 - * from bit 0 to 7 - * @param[in] dev :Structure instance of bme680_dev. - * - * @return Result of API execution status. - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t get_calib_data(struct bme680_dev *dev); - -/*! - * @brief This internal API is used to set the gas configuration of the sensor. - * - * @param[in] dev :Structure instance of bme680_dev. - * - * @return Result of API execution status. - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t set_gas_config(struct bme680_dev *dev); - -/*! - * @brief This internal API is used to get the gas configuration of the sensor. - * - * @param[in] dev :Structure instance of bme680_dev. - * - * @return Result of API execution status. - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t get_gas_config(struct bme680_dev *dev); - -/*! - * @brief This internal API is used to calculate the Heat duration value. - * - * @param[in] dur :Value of the duration to be shared. - * - * @return uint8_t threshold duration after calculation. - */ -static uint8_t calc_heater_dur(uint16_t dur); - -/*! - * @brief This internal API is used to calculate the temperature value. - * - * @param[in] dev :Structure instance of bme680_dev. - * @param[in] temp_adc :Contains the temperature ADC value . - * - * @return uint32_t calculated temperature. - */ -static int16_t calc_temperature(uint32_t temp_adc, struct bme680_dev *dev); - -/*! - * @brief This internal API is used to calculate the pressure value. - * - * @param[in] dev :Structure instance of bme680_dev. - * @param[in] pres_adc :Contains the pressure ADC value . - * - * @return uint32_t calculated pressure. - */ -static uint32_t calc_pressure(uint32_t pres_adc, const struct bme680_dev *dev); - -/*! - * @brief This internal API is used to calculate the humidity value. - * - * @param[in] dev :Structure instance of bme680_dev. - * @param[in] hum_adc :Contains the humidity ADC value. - * - * @return uint32_t calculated humidity. - */ -static uint32_t calc_humidity(uint16_t hum_adc, const struct bme680_dev *dev); - -/*! - * @brief This internal API is used to calculate the Gas Resistance value. - * - * @param[in] dev :Structure instance of bme680_dev. - * @param[in] gas_res_adc :Contains the Gas Resistance ADC value. - * @param[in] gas_range :Contains the range of gas values. - * - * @return uint32_t calculated gas resistance. - */ -static uint32_t calc_gas_resistance(uint16_t gas_res_adc, uint8_t gas_range, const struct bme680_dev *dev); - -/*! - * @brief This internal API is used to calculate the Heat Resistance value. - * - * @param[in] dev :Structure instance of bme680_dev. - * @param[in] temp :Contains the temporary value. - * - * @return uint8_t calculated heater resistance. - */ -static uint8_t calc_heater_res(uint16_t temp, const struct bme680_dev *dev); - -/*! - * @brief This internal API is used to calculate the field data of sensor. - * - * @param[out] data :Structure instance to hold the data - * @param[in] dev :Structure instance of bme680_dev. - * - * @return int8_t result of the field data from sensor. - */ -static int8_t read_field_data(struct bme680_field_data *data, struct bme680_dev *dev); - -/*! - * @brief This internal API is used to set the memory page - * based on register address. - * - * The value of memory page - * value | Description - * --------|-------------- - * 0 | BME680_PAGE0_SPI - * 1 | BME680_PAGE1_SPI - * - * @param[in] dev :Structure instance of bme680_dev. - * @param[in] reg_addr :Contains the register address array. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t set_mem_page(uint8_t reg_addr, struct bme680_dev *dev); - -/*! - * @brief This internal API is used to get the memory page based - * on register address. - * - * The value of memory page - * value | Description - * --------|-------------- - * 0 | BME680_PAGE0_SPI - * 1 | BME680_PAGE1_SPI - * - * @param[in] dev :Structure instance of bme680_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t get_mem_page(struct bme680_dev *dev); - -/*! - * @brief This internal API is used to validate the device pointer for - * null conditions. - * - * @param[in] dev :Structure instance of bme680_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t null_ptr_check(const struct bme680_dev *dev); - -/*! - * @brief This internal API is used to check the boundary - * conditions. - * - * @param[in] value :pointer to the value. - * @param[in] min :minimum value. - * @param[in] max :maximum value. - * @param[in] dev :Structure instance of bme680_dev. - * - * @return Result of API execution status - * @retval zero -> Success / +ve value -> Warning / -ve value -> Error - */ -static int8_t boundary_check(uint8_t *value, uint8_t min, uint8_t max, struct bme680_dev *dev); - -/****************** Global Function Definitions *******************************/ -/*! - *@brief This API is the entry point. - *It reads the chip-id and calibration data from the sensor. - */ -int8_t bme680_init(struct bme680_dev *dev) -{ - int8_t rslt; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) - { - /* Soft reset to restore it to default values*/ - rslt = bme680_soft_reset(dev); - - if (rslt == BME680_OK) { - rslt = bme680_get_regs(BME680_CHIP_ID_ADDR, &dev->chip_id, 1, dev); - if (rslt == BME680_OK) { - if (dev->chip_id == BME680_CHIP_ID) { - rslt = get_calib_data(dev); - } else { - rslt = BME680_E_DEV_NOT_FOUND; - } - } - } - } - - return rslt; -} - -/*! - * @brief This API reads the data from the given register address of the sensor. - */ -int8_t bme680_get_regs(uint8_t reg_addr, uint8_t *reg_data, uint16_t len, struct bme680_dev *dev) -{ - int8_t rslt; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - if (dev->intf == BME680_SPI_INTF) { - /* Set the memory page */ - rslt = set_mem_page(reg_addr, dev); - if (rslt == BME680_OK) - reg_addr = reg_addr | BME680_SPI_RD_MSK; - } - dev->com_rslt = dev->read(dev->dev_id, reg_addr, reg_data, len); - if (dev->com_rslt != 0) - rslt = BME680_E_COM_FAIL; - } - - return rslt; -} - -/*! - * @brief This API writes the given data to the register address - * of the sensor. - */ -int8_t bme680_set_regs(const uint8_t *reg_addr, const uint8_t *reg_data, uint8_t len, struct bme680_dev *dev) -{ - int8_t rslt; - /* Length of the temporary buffer is 2*(length of register)*/ - uint8_t tmp_buff[BME680_TMP_BUFFER_LENGTH] = { 0 }; - uint16_t index; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - if ((len > 0) && (len < BME680_TMP_BUFFER_LENGTH / 2)) { - /* Interleave the 2 arrays */ - for (index = 0; index < len; index++) { - if (dev->intf == BME680_SPI_INTF) { - /* Set the memory page */ - rslt = set_mem_page(reg_addr[index], dev); - tmp_buff[(2 * index)] = reg_addr[index] & BME680_SPI_WR_MSK; - } else { - tmp_buff[(2 * index)] = reg_addr[index]; - } - tmp_buff[(2 * index) + 1] = reg_data[index]; - } - /* Write the interleaved array */ - if (rslt == BME680_OK) { - dev->com_rslt = dev->write(dev->dev_id, tmp_buff[0], &tmp_buff[1], (2 * len) - 1); - if (dev->com_rslt != 0) - rslt = BME680_E_COM_FAIL; - } - } else { - rslt = BME680_E_INVALID_LENGTH; - } - } - - return rslt; -} - -/*! - * @brief This API performs the soft reset of the sensor. - */ -int8_t bme680_soft_reset(struct bme680_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr = BME680_SOFT_RESET_ADDR; - /* 0xb6 is the soft reset command */ - uint8_t soft_rst_cmd = BME680_SOFT_RESET_CMD; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - if (dev->intf == BME680_SPI_INTF) - rslt = get_mem_page(dev); - - /* Reset the device */ - if (rslt == BME680_OK) { - rslt = bme680_set_regs(®_addr, &soft_rst_cmd, 1, dev); - /* Wait for 5ms */ - dev->delay_ms(BME680_RESET_PERIOD); - - if (rslt == BME680_OK) { - /* After reset get the memory page */ - if (dev->intf == BME680_SPI_INTF) - rslt = get_mem_page(dev); - } - } - } - - return rslt; -} - -/*! - * @brief This API is used to set the oversampling, filter and T,P,H, gas selection - * settings in the sensor. - */ -int8_t bme680_set_sensor_settings(uint16_t desired_settings, struct bme680_dev *dev) -{ - int8_t rslt; - uint8_t reg_addr; - uint8_t data = 0; - uint8_t count = 0; - uint8_t reg_array[BME680_REG_BUFFER_LENGTH] = { 0 }; - uint8_t data_array[BME680_REG_BUFFER_LENGTH] = { 0 }; - uint8_t intended_power_mode = dev->power_mode; /* Save intended power mode */ - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - if (desired_settings & BME680_GAS_MEAS_SEL) - rslt = set_gas_config(dev); - - dev->power_mode = BME680_SLEEP_MODE; - if (rslt == BME680_OK) - rslt = bme680_set_sensor_mode(dev); - - /* Selecting the filter */ - if (desired_settings & BME680_FILTER_SEL) { - rslt = boundary_check(&dev->tph_sett.filter, BME680_FILTER_SIZE_0, BME680_FILTER_SIZE_127, dev); - reg_addr = BME680_CONF_ODR_FILT_ADDR; - - if (rslt == BME680_OK) - rslt = bme680_get_regs(reg_addr, &data, 1, dev); - - if (desired_settings & BME680_FILTER_SEL) - data = BME680_SET_BITS(data, BME680_FILTER, dev->tph_sett.filter); - - reg_array[count] = reg_addr; /* Append configuration */ - data_array[count] = data; - count++; - } - - /* Selecting heater control for the sensor */ - if (desired_settings & BME680_HCNTRL_SEL) { - rslt = boundary_check(&dev->gas_sett.heatr_ctrl, BME680_ENABLE_HEATER, BME680_DISABLE_HEATER, dev); - reg_addr = BME680_CONF_HEAT_CTRL_ADDR; - - if (rslt == BME680_OK) - rslt = bme680_get_regs(reg_addr, &data, 1, dev); - data = BME680_SET_BITS_POS_0(data, BME680_HCTRL, dev->gas_sett.heatr_ctrl); - - reg_array[count] = reg_addr; /* Append configuration */ - data_array[count] = data; - count++; - } - - /* Selecting heater T,P oversampling for the sensor */ - if (desired_settings & (BME680_OST_SEL | BME680_OSP_SEL)) { - rslt = boundary_check(&dev->tph_sett.os_temp, BME680_OS_NONE, BME680_OS_16X, dev); - reg_addr = BME680_CONF_T_P_MODE_ADDR; - - if (rslt == BME680_OK) - rslt = bme680_get_regs(reg_addr, &data, 1, dev); - - if (desired_settings & BME680_OST_SEL) - data = BME680_SET_BITS(data, BME680_OST, dev->tph_sett.os_temp); - - if (desired_settings & BME680_OSP_SEL) - data = BME680_SET_BITS(data, BME680_OSP, dev->tph_sett.os_pres); - - reg_array[count] = reg_addr; - data_array[count] = data; - count++; - } - - /* Selecting humidity oversampling for the sensor */ - if (desired_settings & BME680_OSH_SEL) { - rslt = boundary_check(&dev->tph_sett.os_hum, BME680_OS_NONE, BME680_OS_16X, dev); - reg_addr = BME680_CONF_OS_H_ADDR; - - if (rslt == BME680_OK) - rslt = bme680_get_regs(reg_addr, &data, 1, dev); - data = BME680_SET_BITS_POS_0(data, BME680_OSH, dev->tph_sett.os_hum); - - reg_array[count] = reg_addr; /* Append configuration */ - data_array[count] = data; - count++; - } - - /* Selecting the runGas and NB conversion settings for the sensor */ - if (desired_settings & (BME680_RUN_GAS_SEL | BME680_NBCONV_SEL)) { - rslt = boundary_check(&dev->gas_sett.run_gas, BME680_RUN_GAS_DISABLE, BME680_RUN_GAS_ENABLE, dev); - if (rslt == BME680_OK) - rslt = boundary_check(&dev->gas_sett.nb_conv, BME680_NBCONV_MIN, BME680_NBCONV_MAX, dev); - reg_addr = BME680_CONF_ODR_RUN_GAS_NBC_ADDR; - - if (rslt == BME680_OK) - rslt = bme680_get_regs(reg_addr, &data, 1, dev); - - if (desired_settings & BME680_RUN_GAS_SEL) - data = BME680_SET_BITS(data, BME680_RUN_GAS, dev->gas_sett.run_gas); - - if (desired_settings & BME680_NBCONV_SEL) - data = BME680_SET_BITS_POS_0(data, BME680_NBCONV, dev->gas_sett.nb_conv); - - reg_array[count] = reg_addr; /* Append configuration */ - data_array[count] = data; - count++; - } - - if (rslt == BME680_OK) - rslt = bme680_set_regs(reg_array, data_array, count, dev); - - /* Restore previous intended power mode */ - dev->power_mode = intended_power_mode; - } - - return rslt; -} - -/*! - * @brief This API is used to get the oversampling, filter and T,P,H, gas selection - * settings in the sensor. - */ -int8_t bme680_get_sensor_settings(uint16_t desired_settings, struct bme680_dev *dev) -{ - int8_t rslt; - /* starting address of the register array for burst read*/ - uint8_t reg_addr = BME680_CONF_HEAT_CTRL_ADDR; - uint8_t data_array[BME680_REG_BUFFER_LENGTH] = { 0 }; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - rslt = bme680_get_regs(reg_addr, data_array, BME680_REG_BUFFER_LENGTH, dev); - - if (rslt == BME680_OK) { - if (desired_settings & BME680_GAS_MEAS_SEL) - rslt = get_gas_config(dev); - - /* get the T,P,H ,Filter,ODR settings here */ - if (desired_settings & BME680_FILTER_SEL) - dev->tph_sett.filter = BME680_GET_BITS(data_array[BME680_REG_FILTER_INDEX], BME680_FILTER); - - if (desired_settings & (BME680_OST_SEL | BME680_OSP_SEL)) { - dev->tph_sett.os_temp = BME680_GET_BITS(data_array[BME680_REG_TEMP_INDEX], BME680_OST); - dev->tph_sett.os_pres = BME680_GET_BITS(data_array[BME680_REG_PRES_INDEX], BME680_OSP); - } - - if (desired_settings & BME680_OSH_SEL) - dev->tph_sett.os_hum = BME680_GET_BITS_POS_0(data_array[BME680_REG_HUM_INDEX], BME680_OSH); - - /* get the gas related settings */ - if (desired_settings & BME680_HCNTRL_SEL) - dev->gas_sett.heatr_ctrl = BME680_GET_BITS_POS_0(data_array[BME680_REG_HCTRL_INDEX], BME680_HCTRL); - - if (desired_settings & (BME680_RUN_GAS_SEL | BME680_NBCONV_SEL)) { - dev->gas_sett.nb_conv = BME680_GET_BITS_POS_0(data_array[BME680_REG_NBCONV_INDEX], BME680_NBCONV); - dev->gas_sett.run_gas = BME680_GET_BITS(data_array[BME680_REG_RUN_GAS_INDEX], BME680_RUN_GAS); - } - } - } else { - rslt = BME680_E_NULL_PTR; - } - - return rslt; -} - -/*! - * @brief This API is used to set the power mode of the sensor. - */ -int8_t bme680_set_sensor_mode(struct bme680_dev *dev) -{ - int8_t rslt; - uint8_t tmp_pow_mode; - uint8_t pow_mode = 0; - uint8_t reg_addr = BME680_CONF_T_P_MODE_ADDR; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - /* Call recursively until in sleep */ - do { - rslt = bme680_get_regs(BME680_CONF_T_P_MODE_ADDR, &tmp_pow_mode, 1, dev); - if (rslt == BME680_OK) { - /* Put to sleep before changing mode */ - pow_mode = (tmp_pow_mode & BME680_MODE_MSK); - - if (pow_mode != BME680_SLEEP_MODE) { - tmp_pow_mode = tmp_pow_mode & (~BME680_MODE_MSK); /* Set to sleep */ - rslt = bme680_set_regs(®_addr, &tmp_pow_mode, 1, dev); - dev->delay_ms(BME680_POLL_PERIOD_MS); - } - } - } while (pow_mode != BME680_SLEEP_MODE); - - /* Already in sleep */ - if (dev->power_mode != BME680_SLEEP_MODE) { - tmp_pow_mode = (tmp_pow_mode & ~BME680_MODE_MSK) | (dev->power_mode & BME680_MODE_MSK); - if (rslt == BME680_OK) - rslt = bme680_set_regs(®_addr, &tmp_pow_mode, 1, dev); - } - } - - return rslt; -} - -/*! - * @brief This API is used to get the power mode of the sensor. - */ -int8_t bme680_get_sensor_mode(struct bme680_dev *dev) -{ - int8_t rslt; - uint8_t mode; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - rslt = bme680_get_regs(BME680_CONF_T_P_MODE_ADDR, &mode, 1, dev); - /* Masking the other register bit info*/ - dev->power_mode = mode & BME680_MODE_MSK; - } - - return rslt; -} - -/*! - * @brief This API is used to set the profile duration of the sensor. - */ -void bme680_set_profile_dur(uint16_t duration, struct bme680_dev *dev) -{ - uint32_t tph_dur; /* Calculate in us */ - - /* TPH measurement duration */ - tph_dur = ((uint32_t) (dev->tph_sett.os_temp + dev->tph_sett.os_pres + dev->tph_sett.os_hum) * UINT32_C(1963)); - tph_dur += UINT32_C(477 * 4); /* TPH switching duration */ - tph_dur += UINT32_C(477 * 5); /* Gas measurement duration */ - tph_dur += UINT32_C(500); /* Get it to the closest whole number.*/ - tph_dur /= UINT32_C(1000); /* Convert to ms */ - - tph_dur += UINT32_C(1); /* Wake up duration of 1ms */ - /* The remaining time should be used for heating */ - dev->gas_sett.heatr_dur = duration - (uint16_t) tph_dur; -} - -/*! - * @brief This API is used to get the profile duration of the sensor. - */ -void bme680_get_profile_dur(uint16_t *duration, struct bme680_dev *dev) -{ - uint32_t tph_dur; /* Calculate in us */ - - /* TPH measurement duration */ - tph_dur = ((uint32_t) (dev->tph_sett.os_temp + dev->tph_sett.os_pres + dev->tph_sett.os_hum) * UINT32_C(1963)); - tph_dur += UINT32_C(477 * 4); /* TPH switching duration */ - tph_dur += UINT32_C(477 * 5); /* Gas measurement duration */ - tph_dur += UINT32_C(500); /* Get it to the closest whole number.*/ - tph_dur /= UINT32_C(1000); /* Convert to ms */ - - tph_dur += UINT32_C(1); /* Wake up duration of 1ms */ - /* The remaining time should be used for heating */ - *duration = dev->gas_sett.heatr_dur + (uint16_t) tph_dur; -} - -/*! - * @brief This API reads the pressure, temperature and humidity and gas data - * from the sensor, compensates the data and store it in the bme680_data - * structure instance passed by the user. - */ -int8_t bme680_get_sensor_data(struct bme680_field_data *data, struct bme680_dev *dev) -{ - int8_t rslt; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - /* Reading the sensor data in forced mode only */ - rslt = read_field_data(data, dev); - if (rslt == BME680_OK) { - if (data->status & BME680_NEW_DATA_MSK) - dev->new_fields = 1; - else - dev->new_fields = 0; - } - } - - return rslt; -} - -/*! - * @brief This internal API is used to read the calibrated data from the sensor. - */ -static int8_t get_calib_data(struct bme680_dev *dev) -{ - int8_t rslt; - uint8_t coeff_array[BME680_COEFF_SIZE] = { 0 }; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - rslt = bme680_get_regs(BME680_COEFF_ADDR1, coeff_array, BME680_COEFF_ADDR1_LEN, dev); - /* Append the second half in the same array */ - if (rslt == BME680_OK) - rslt = bme680_get_regs(BME680_COEFF_ADDR2, &coeff_array[BME680_COEFF_ADDR1_LEN], BME680_COEFF_ADDR2_LEN, - dev); - - /* Temperature related coefficients */ - dev->calib.par_t1 = (uint16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_T1_MSB_REG], - coeff_array[BME680_T1_LSB_REG])); - dev->calib.par_t2 = (int16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_T2_MSB_REG], - coeff_array[BME680_T2_LSB_REG])); - dev->calib.par_t3 = (int8_t) (coeff_array[BME680_T3_REG]); - - /* Pressure related coefficients */ - dev->calib.par_p1 = (uint16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_P1_MSB_REG], - coeff_array[BME680_P1_LSB_REG])); - dev->calib.par_p2 = (int16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_P2_MSB_REG], - coeff_array[BME680_P2_LSB_REG])); - dev->calib.par_p3 = (int8_t) coeff_array[BME680_P3_REG]; - dev->calib.par_p4 = (int16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_P4_MSB_REG], - coeff_array[BME680_P4_LSB_REG])); - dev->calib.par_p5 = (int16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_P5_MSB_REG], - coeff_array[BME680_P5_LSB_REG])); - dev->calib.par_p6 = (int8_t) (coeff_array[BME680_P6_REG]); - dev->calib.par_p7 = (int8_t) (coeff_array[BME680_P7_REG]); - dev->calib.par_p8 = (int16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_P8_MSB_REG], - coeff_array[BME680_P8_LSB_REG])); - dev->calib.par_p9 = (int16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_P9_MSB_REG], - coeff_array[BME680_P9_LSB_REG])); - dev->calib.par_p10 = (uint8_t) (coeff_array[BME680_P10_REG]); - - /* Humidity related coefficients */ - dev->calib.par_h1 = (uint16_t) (((uint16_t) coeff_array[BME680_H1_MSB_REG] << BME680_HUM_REG_SHIFT_VAL) - | (coeff_array[BME680_H1_LSB_REG] & BME680_BIT_H1_DATA_MSK)); - dev->calib.par_h2 = (uint16_t) (((uint16_t) coeff_array[BME680_H2_MSB_REG] << BME680_HUM_REG_SHIFT_VAL) - | ((coeff_array[BME680_H2_LSB_REG]) >> BME680_HUM_REG_SHIFT_VAL)); - dev->calib.par_h3 = (int8_t) coeff_array[BME680_H3_REG]; - dev->calib.par_h4 = (int8_t) coeff_array[BME680_H4_REG]; - dev->calib.par_h5 = (int8_t) coeff_array[BME680_H5_REG]; - dev->calib.par_h6 = (uint8_t) coeff_array[BME680_H6_REG]; - dev->calib.par_h7 = (int8_t) coeff_array[BME680_H7_REG]; - - /* Gas heater related coefficients */ - dev->calib.par_gh1 = (int8_t) coeff_array[BME680_GH1_REG]; - dev->calib.par_gh2 = (int16_t) (BME680_CONCAT_BYTES(coeff_array[BME680_GH2_MSB_REG], - coeff_array[BME680_GH2_LSB_REG])); - dev->calib.par_gh3 = (int8_t) coeff_array[BME680_GH3_REG]; - - /* Other coefficients */ - uint8_t temp_var = 0; /* Temporary variable */ - - if (rslt == BME680_OK) { - rslt = bme680_get_regs(BME680_ADDR_RES_HEAT_RANGE_ADDR, &temp_var, 1, dev); - - dev->calib.res_heat_range = ((temp_var & BME680_RHRANGE_MSK) / 16); - if (rslt == BME680_OK) { - rslt = bme680_get_regs(BME680_ADDR_RES_HEAT_VAL_ADDR, &temp_var, 1, dev); - - dev->calib.res_heat_val = (int8_t) temp_var; - if (rslt == BME680_OK) - rslt = bme680_get_regs(BME680_ADDR_RANGE_SW_ERR_ADDR, &temp_var, 1, dev); - } - } - dev->calib.range_sw_err = ((int8_t) temp_var & (int8_t) BME680_RSERROR_MSK) / 16; - } - - return rslt; -} - -/*! - * @brief This internal API is used to set the gas configuration of the sensor. - */ -static int8_t set_gas_config(struct bme680_dev *dev) -{ - int8_t rslt; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - - uint8_t reg_addr[2], reg_data[2]; - - if (dev->power_mode == BME680_FORCED_MODE) { - reg_addr[0] = BME680_RES_HEAT0_ADDR; - reg_data[0] = calc_heater_res(dev->gas_sett.heatr_temp, dev); - reg_addr[1] = BME680_GAS_WAIT0_ADDR; - reg_data[1] = calc_heater_dur(dev->gas_sett.heatr_dur); - dev->gas_sett.nb_conv = 0; - } else { - rslt = BME680_W_DEFINE_PWR_MODE; - } - if (rslt == BME680_OK) - rslt = bme680_set_regs(reg_addr, reg_data, 2, dev); - } - - return rslt; -} - -/*! - * @brief This internal API is used to get the gas configuration of the sensor. - */ -static int8_t get_gas_config(struct bme680_dev *dev) -{ - int8_t rslt; - /* starting address of the register array for burst read*/ - uint8_t reg_addr1 = BME680_ADDR_SENS_CONF_START; - uint8_t reg_addr2 = BME680_ADDR_GAS_CONF_START; - uint8_t data_array[BME680_GAS_HEATER_PROF_LEN_MAX] = { 0 }; - uint8_t index; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - if (BME680_SPI_INTF == dev->intf) { - /* Memory page switch the SPI address*/ - rslt = set_mem_page(reg_addr1, dev); - } - - if (rslt == BME680_OK) { - rslt = bme680_get_regs(reg_addr1, data_array, BME680_GAS_HEATER_PROF_LEN_MAX, dev); - if (rslt == BME680_OK) { - for (index = 0; index < BME680_GAS_HEATER_PROF_LEN_MAX; index++) - dev->gas_sett.heatr_temp = data_array[index]; - } - - rslt = bme680_get_regs(reg_addr2, data_array, BME680_GAS_HEATER_PROF_LEN_MAX, dev); - if (rslt == BME680_OK) { - for (index = 0; index < BME680_GAS_HEATER_PROF_LEN_MAX; index++) - dev->gas_sett.heatr_dur = data_array[index]; - } - } - } - - return rslt; -} - -/*! - * @brief This internal API is used to calculate the temperature value. - */ -static int16_t calc_temperature(uint32_t temp_adc, struct bme680_dev *dev) -{ - int64_t var1; - int64_t var2; - int64_t var3; - int16_t calc_temp; - - var1 = ((int32_t) temp_adc / 8) - ((int32_t) dev->calib.par_t1 * 2); - var2 = (var1 * (int32_t) dev->calib.par_t2) / 2048; - var3 = ((var1 / 2) * (var1 / 2)) / 4096; - var3 = ((var3) * ((int32_t) dev->calib.par_t3 * 16)) / 16384; - dev->calib.t_fine = (int32_t) (var2 + var3); - calc_temp = (int16_t) (((dev->calib.t_fine * 5) + 128) / 256); - - return calc_temp; -} - -/*! - * @brief This internal API is used to calculate the pressure value. - */ -static uint32_t calc_pressure(uint32_t pres_adc, const struct bme680_dev *dev) -{ - int32_t var1; - int32_t var2; - int32_t var3; - int32_t calc_pres; - - var1 = (((int32_t) dev->calib.t_fine) / 2) - 64000; - var2 = ((var1 / 4) * (var1 / 4)) / 2048; - var2 = ((var2) * (int32_t) dev->calib.par_p6) / 4; - var2 = var2 + ((var1 * (int32_t) dev->calib.par_p5) * 2); - var2 = (var2 / 4) + ((int32_t) dev->calib.par_p4 * 65536); - var1 = ((var1 / 4) * (var1 / 4)) / 8192; - var1 = (((var1) * ((int32_t) dev->calib.par_p3 * 32)) / 8) + (((int32_t) dev->calib.par_p2 * var1) / 2); - var1 = var1 / 262144; - var1 = ((32768 + var1) * (int32_t) dev->calib.par_p1) / 32768; - calc_pres = (int32_t) (1048576 - pres_adc); - calc_pres = (int32_t) ((calc_pres - (var2 / 4096)) * (3125)); - calc_pres = ((calc_pres / var1) * 2); - var1 = ((int32_t) dev->calib.par_p9 * (int32_t) (((calc_pres / 8) * (calc_pres / 8)) / 8192)) / 4096; - var2 = ((int32_t) (calc_pres / 4) * (int32_t) dev->calib.par_p8) / 8192; - var3 = ((int32_t) (calc_pres / 256) * (int32_t) (calc_pres / 256) * (int32_t) (calc_pres / 256) - * (int32_t) dev->calib.par_p10) / 131072; - calc_pres = (int32_t) (calc_pres) + ((var1 + var2 + var3 + ((int32_t) dev->calib.par_p7 * 128)) / 16); - - return (uint32_t) calc_pres; -} - -/*! - * @brief This internal API is used to calculate the humidity value. - */ -static uint32_t calc_humidity(uint16_t hum_adc, const struct bme680_dev *dev) -{ - int32_t var1; - int32_t var2; - int32_t var3; - int32_t var4; - int32_t var5; - int32_t var6; - int32_t temp_scaled; - int32_t calc_hum; - - temp_scaled = (((int32_t) dev->calib.t_fine * 5) + 128) / 256; - var1 = (int32_t) (hum_adc - ((int32_t) ((int32_t) dev->calib.par_h1 * 16))) - - (((temp_scaled * (int32_t) dev->calib.par_h3) / ((int32_t) 100)) / 2); - var2 = ((int32_t) dev->calib.par_h2 - * (((temp_scaled * (int32_t) dev->calib.par_h4) / ((int32_t) 100)) - + (((temp_scaled * ((temp_scaled * (int32_t) dev->calib.par_h5) / ((int32_t) 100))) / 64) - / ((int32_t) 100)) + (int32_t) (1 * 16384))) / 1024; - var3 = var1 * var2; - var4 = (int32_t) dev->calib.par_h6 * 128; - var4 = ((var4) + ((temp_scaled * (int32_t) dev->calib.par_h7) / ((int32_t) 100))) / 16; - var5 = ((var3 / 16384) * (var3 / 16384)) / 1024; - var6 = (var4 * var5) / 2; - calc_hum = (((var3 + var6) / 1024) * ((int32_t) 1000)) / 4096; - - if (calc_hum > 100000) /* Cap at 100%rH */ - calc_hum = 100000; - else if (calc_hum < 0) - calc_hum = 0; - - return (uint32_t) calc_hum; -} - -/*! - * @brief This internal API is used to calculate the Gas Resistance value. - */ -static uint32_t calc_gas_resistance(uint16_t gas_res_adc, uint8_t gas_range, const struct bme680_dev *dev) -{ - int64_t var1; - uint64_t var2; - int64_t var3; - uint32_t calc_gas_res; - - var1 = (int64_t) ((1340 + (5 * (int64_t) dev->calib.range_sw_err)) * ((int64_t) lookupTable1[gas_range])) / 65536; - var2 = (((int64_t) ((int64_t) gas_res_adc * 32768) - (int64_t) (16777216)) + var1); - var3 = (((int64_t) lookupTable2[gas_range] * (int64_t) var1) / 512); - calc_gas_res = (uint32_t) ((var3 + ((int64_t) var2 / 2)) / (int64_t) var2); - - return calc_gas_res; -} - -/*! - * @brief This internal API is used to calculate the Heat Resistance value. - */ -static uint8_t calc_heater_res(uint16_t temp, const struct bme680_dev *dev) -{ - uint8_t heatr_res; - int32_t var1; - int32_t var2; - int32_t var3; - int32_t var4; - int32_t var5; - int32_t heatr_res_x100; - - if (temp < 200) /* Cap temperature */ - temp = 200; - else if (temp > 400) - temp = 400; - - var1 = (((int32_t) dev->amb_temp * dev->calib.par_gh3) / 1000) * 256; - var2 = (dev->calib.par_gh1 + 784) * (((((dev->calib.par_gh2 + 154009) * temp * 5) / 100) + 3276800) / 10); - var3 = var1 + (var2 / 2); - var4 = (var3 / (dev->calib.res_heat_range + 4)); - var5 = (131 * dev->calib.res_heat_val) + 65536; - heatr_res_x100 = (int32_t) (((var4 / var5) - 250) * 34); - heatr_res = (uint8_t) ((heatr_res_x100 + 50) / 100); - - return heatr_res; -} - -/*! - * @brief This internal API is used to calculate the Heat duration value. - */ -static uint8_t calc_heater_dur(uint16_t dur) -{ - uint8_t factor = 0; - uint8_t durval; - - if (dur >= 0xfc0) { - durval = 0xff; /* Max duration*/ - } else { - while (dur > 0x3F) { - dur = dur / 4; - factor += 1; - } - durval = (uint8_t) (dur + (factor * 64)); - } - - return durval; -} - -/*! - * @brief This internal API is used to calculate the field data of sensor. - */ -static int8_t read_field_data(struct bme680_field_data *data, struct bme680_dev *dev) -{ - int8_t rslt; - uint8_t buff[BME680_FIELD_LENGTH] = { 0 }; - uint8_t gas_range; - uint32_t adc_temp; - uint32_t adc_pres; - uint16_t adc_hum; - uint16_t adc_gas_res; - uint8_t tries = 10; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - do { - if (rslt == BME680_OK) { - rslt = bme680_get_regs(((uint8_t) (BME680_FIELD0_ADDR)), buff, (uint16_t) BME680_FIELD_LENGTH, dev); - - data->status = buff[0] & BME680_NEW_DATA_MSK; - data->gas_index = buff[0] & BME680_GAS_INDEX_MSK; - data->meas_index = buff[1]; - - /* read the raw data from the sensor */ - adc_pres = (uint32_t) (((uint32_t) buff[2] * 4096) | ((uint32_t) buff[3] * 16) | ((uint32_t) buff[4] / 16)); - adc_temp = (uint32_t) (((uint32_t) buff[5] * 4096) | ((uint32_t) buff[6] * 16) | ((uint32_t) buff[7] / 16)); - adc_hum = (uint16_t) (((uint32_t) buff[8] * 256) | (uint32_t) buff[9]); - adc_gas_res = (uint16_t) ((uint32_t) buff[13] * 4 | (((uint32_t) buff[14]) / 64)); - gas_range = buff[14] & BME680_GAS_RANGE_MSK; - - data->status |= buff[14] & BME680_GASM_VALID_MSK; - data->status |= buff[14] & BME680_HEAT_STAB_MSK; - - if (data->status & BME680_NEW_DATA_MSK) { - data->temperature = calc_temperature(adc_temp, dev); - data->pressure = calc_pressure(adc_pres, dev); - data->humidity = calc_humidity(adc_hum, dev); - data->gas_resistance = calc_gas_resistance(adc_gas_res, gas_range, dev); - break; - } else { - dev->delay_ms(BME680_POLL_PERIOD_MS); - } - } - tries--; - } while (tries); - - if (!tries) - rslt = BME680_W_NO_NEW_DATA; - - return rslt; -} - -/*! - * @brief This internal API is used to set the memory page based on register address. - */ -static int8_t set_mem_page(uint8_t reg_addr, struct bme680_dev *dev) -{ - int8_t rslt; - uint8_t reg; - uint8_t mem_page; - - /* Check for null pointers in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - if (reg_addr > 0x7f) - mem_page = BME680_MEM_PAGE1; - else - mem_page = BME680_MEM_PAGE0; - - if (mem_page != dev->mem_page) { - dev->mem_page = mem_page; - - dev->com_rslt = dev->read(dev->dev_id, BME680_MEM_PAGE_ADDR | BME680_SPI_RD_MSK, ®, 1); - if (dev->com_rslt != 0) - rslt = BME680_E_COM_FAIL; - - if (rslt == BME680_OK) { - reg = reg & (~BME680_MEM_PAGE_MSK); - reg = reg | (dev->mem_page & BME680_MEM_PAGE_MSK); - - dev->com_rslt = dev->write(dev->dev_id, BME680_MEM_PAGE_ADDR & BME680_SPI_WR_MSK, ®, 1); - if (dev->com_rslt != 0) - rslt = BME680_E_COM_FAIL; - } - } - } - - return rslt; -} - -/*! - * @brief This internal API is used to get the memory page based on register address. - */ -static int8_t get_mem_page(struct bme680_dev *dev) -{ - int8_t rslt; - uint8_t reg; - - /* Check for null pointer in the device structure*/ - rslt = null_ptr_check(dev); - if (rslt == BME680_OK) { - dev->com_rslt = dev->read(dev->dev_id, BME680_MEM_PAGE_ADDR | BME680_SPI_RD_MSK, ®, 1); - if (dev->com_rslt != 0) - rslt = BME680_E_COM_FAIL; - else - dev->mem_page = reg & BME680_MEM_PAGE_MSK; - } - - return rslt; -} - -/*! - * @brief This internal API is used to validate the boundary - * conditions. - */ -static int8_t boundary_check(uint8_t *value, uint8_t min, uint8_t max, struct bme680_dev *dev) -{ - int8_t rslt = BME680_OK; - - if (value != NULL) { - /* Check if value is below minimum value */ - if (*value < min) { - /* Auto correct the invalid value to minimum value */ - *value = min; - dev->info_msg |= BME680_I_MIN_CORRECTION; - } - /* Check if value is above maximum value */ - if (*value > max) { - /* Auto correct the invalid value to maximum value */ - *value = max; - dev->info_msg |= BME680_I_MAX_CORRECTION; - } - } else { - rslt = BME680_E_NULL_PTR; - } - - return rslt; -} - -/*! - * @brief This internal API is used to validate the device structure pointer for - * null conditions. - */ -static int8_t null_ptr_check(const struct bme680_dev *dev) -{ - int8_t rslt; - - if ((dev == NULL) || (dev->read == NULL) || (dev->write == NULL) || (dev->delay_ms == NULL)) { - /* Device structure pointer is not valid */ - rslt = BME680_E_NULL_PTR; - } else { - /* Device structure is fine */ - rslt = BME680_OK; - } - - return rslt; -}