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Updated to v3.2.0
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README.md
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README.md
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# BME280 sensor API
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## Introduction
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This package contains the Bosch Sensortec's BME280 pressure sensor driver (sensor API)
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CONTENTS OF THIS FILE
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=======================
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* Introduction
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* Version
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* Integration details
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* Driver files information
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* Supported sensor interface
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* Copyright
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The sensor driver package includes bme280.c, bme280.h and bme280_defs.h files.
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INTRODUCTION
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===============
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- This package contains the Bosch Sensortec MEMS humidity sensor driver(sensor API)
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- The sensor driver package includes bme280.h, bme280.c and bme280_support.c files
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## Version
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File | Version | Date
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-----|---------|-----
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bme280.c | 3.2.0 | 21 Mar 2017
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bme280.h | 3.2.0 | 21 Mar 2017
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bme280_defs.h | 3.2.0 | 21 Mar 2017
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VERSION
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=========
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- Version of bme280 sensor driver is:
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* bme280.c - V2.0.5
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* bme280.h - V2.0.5
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* bme280_support.c - V1.0.6
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## Integration details
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* Integrate bme280.h, bme280_defs.h and bme280.c file in to the project.
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* Include the bme280.h file in your code like below.
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``` c
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#include "bme280.h"
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```
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INTEGRATION DETAILS
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=====================
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- Integrate bme280.h and bme280.c file in to your project.
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- The bme280_support.c file contains only examples for API use cases, so it is not required to integrate into project.
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## File information
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* bme280_defs.h : This header file has the constants, macros and datatype declarations.
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* bme280.h : This header file contains the declarations of the sensor driver APIs.
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* bme280.c : This source file contains the definitions of the sensor driver APIs.
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DRIVER FILES INFORMATION
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===========================
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bme280.h
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-----------
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* This header file has the register address definition, constant definitions, data type definition and supported sensor driver calls declarations.
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## Supported sensor interfaces
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* SPI 4-wire
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* I2C
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bme280.c
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------------
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* This file contains the implementation for the sensor driver APIs.
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SPI 3-wire is currently not supported in the API.
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## Usage guide
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### Initializing the sensor
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To initialize the sensor, user need to create a device structure. User can do this by
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creating an instance of the structure bme280_dev. After creating the device strcuture, user
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need to fill in the various parameters as shown below.
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bme280_support.c
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----------------------
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* This file shall be used as an user guidance, here you can find samples of
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* Initialize the sensor with I2C/SPI communication
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- Add your code to the SPI and/or I2C bus read and bus write functions.
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- Return value can be chosen by yourself
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- API just passes that value to your application code
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- Add your code to the delay function
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- Change I2C address accordingly in bme280.h
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* Power mode configuration of the sensor
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* Get and set functions usage
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* Reading the sensor read out data
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#### Example for SPI 4-Wire
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``` c
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struct bme280_dev dev;
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int8_t rslt = BME280_OK;
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SUPPORTED SENSOR INTERFACE
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====================================
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- This humidity sensor driver supports SPI and I2C interfaces
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/* Sensor_0 interface over SPI with native chip select line */
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dev.id = 0;
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dev.interface = BME280_SPI_INTF;
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dev.read = user_spi_read;
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dev.write = user_spi_write;
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dev.delay_ms = user_delay_ms;
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rslt = bme280_init(&dev);
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```
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#### Example for I2C
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``` c
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struct bme280_dev dev;
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int8_t rslt = BME280_OK;
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COPYRIGHT
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===========
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- Copyright (C) 2013 - 2016 Bosch Sensortec GmbH
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dev.id = BME280_I2C_ADDR_PRIM;
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dev.interface = BME280_I2C_INTF;
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dev.read = user_i2c_read;
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dev.write = user_i2c_write;
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dev.delay_ms = user_delay_ms;
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rslt = bme280_init(&dev);
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```
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Regarding compensation functions for temperature,pressure and humidity we have two implementations.
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1) Double precision floating point version
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2) Integer version
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By default, integer version is used in the API. If user needs double version, user has to
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enable FLOATING_POINT_REPRESENTATION macro in bme280_defs.h file.
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In integer compensation functions, we also have below two implementations for pressure.
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1) For 32 bit machine.
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2) For 64 bit machine.
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By default, 64 bit variant is used in the API. If user wants 32 bit variant, user can disable the
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macro MACHINE_64_BIT in bme280_defs.h file.
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### Get sensor data
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#### Get sensor data in forced mode
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``` c
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int8_t get_sensor_data_forced_mode(struct bme280_dev *dev)
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{
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int8_t rslt;
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uint8_t settings_sel;
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struct bme280_data comp_data;
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/* Continuously get the sensor data */
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while (1) {
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dev->settings.osr_h = BME280_OVERSAMPLING_4X;
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dev->settings.osr_p = BME280_OVERSAMPLING_4X;
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dev->settings.osr_t = BME280_OVERSAMPLING_4X;
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settings_sel = BME280_OSR_PRESS_SEL|BME280_OSR_TEMP_SEL|BME280_OSR_HUM_SEL;
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rslt = bme280_set_sensor_settings(settings_sel, dev);
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rslt = bme280_set_sensor_mode(BME280_FORCED_MODE, dev);
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/* Give some delay for the sensor to go into force mode */
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dev->delay_ms(5);
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rslt = bme280_get_sensor_data(BME280_PRESS | BME280_HUM | BME280_TEMP, &comp_data, dev);
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print_sensor_data(&comp_data);
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}
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return rslt;
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}
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void print_sensor_data(struct bme280_data *comp_data)
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{
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#ifdef FLOATING_POINT_REPRESENTATION
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printf("%0.2f\t\t%0.2f\t\t%0.2f\t\n",comp_data->temperature, comp_data->pressure, comp_data->humidity);
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#else
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printf("%ld\t\t%ld\t\t%ld\t\n",comp_data->temperature, comp_data->pressure, comp_data->humidity);
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#endif
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}
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```
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##### Get sensor data in normal mode
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``` c
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int8_t get_sensor_data_normal_mode(struct bme280_dev *dev)
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{
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int8_t rslt;
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uint8_t settings_sel;
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struct bme280_data comp_data;
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dev->settings.osr_h = BME280_OVERSAMPLING_4X;
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dev->settings.osr_p = BME280_OVERSAMPLING_4X;
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dev->settings.osr_t = BME280_OVERSAMPLING_4X;
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settings_sel = BME280_OSR_PRESS_SEL|BME280_OSR_TEMP_SEL|BME280_OSR_HUM_SEL;
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rslt = bme280_set_sensor_settings(settings_sel, dev);
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rslt = bme280_set_sensor_mode(BME280_NORMAL_MODE, dev);
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/* Give some delay for the sensor to go into normal mode */
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dev->delay_ms(5);
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while (1) {
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rslt = bme280_get_sensor_data(BME280_PRESS | BME280_HUM | BME280_TEMP, &comp_data, dev);
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print_sensor_data(&comp_data);
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}
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return rslt;
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}
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void print_sensor_data(struct bme280_data *comp_data)
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{
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#ifdef FLOATING_POINT_REPRESENTATION
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printf("%0.2f\t\t%0.2f\t\t%0.2f\t\n",comp_data->temperature, comp_data->pressure, comp_data->humidity);
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#else
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printf("%ld\t\t%ld\t\t%ld\t\n",comp_data->temperature, comp_data->pressure, comp_data->humidity);
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#endif
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}
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```
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## Copyright (C) 2016 - 2017 Bosch Sensortec GmbH
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372
bme280_defs.h
Normal file
372
bme280_defs.h
Normal file
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/**
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* Copyright (C) 2016 - 2017 Bosch Sensortec GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Neither the name of the copyright holder nor the names of the
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL COPYRIGHT HOLDER
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* OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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* OR CONSEQUENTIAL DAMAGES(INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
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*
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* The information provided is believed to be accurate and reliable.
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* The copyright holder assumes no responsibility
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* for the consequences of use
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* of such information nor for any infringement of patents or
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* other rights of third parties which may result from its use.
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* No license is granted by implication or otherwise under any patent or
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* patent rights of the copyright holder.
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*
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* @file bme280_defs.h
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* @date 21 Mar 2017
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* @version 3.2.0
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* @brief
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*
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*/
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/*! @file bme280_defs.h
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@brief Sensor driver for BME280 sensor */
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/*!
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* @defgroup BME280 SENSOR API
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* @brief
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* @{*/
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#ifndef BME280_DEFS_H_
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#define BME280_DEFS_H_
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/********************************************************/
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/* header includes */
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#ifdef __KERNEL__
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#include <linux/types.h>
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#else
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#include <stdint.h>
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#include <stdio.h>
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#endif
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#ifdef __KERNEL__
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#if (LONG_MAX) > 0x7fffffff
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#define __have_long64 1
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#elif (LONG_MAX) == 0x7fffffff
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#define __have_long32 1
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#endif
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#if !defined(UINT8_C)
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#define INT8_C(x) x
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#if (INT_MAX) > 0x7f
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#define UINT8_C(x) x
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#else
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#define UINT8_C(x) x##U
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#endif
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#endif
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#if !defined(UINT16_C)
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#define INT16_C(x) x
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#if (INT_MAX) > 0x7fff
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#define UINT16_C(x) x
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#else
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#define UINT16_C(x) x##U
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#endif
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#endif
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#if !defined(INT32_C) && !defined(UINT32_C)
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#if __have_long32
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#define INT32_C(x) x##L
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#define UINT32_C(x) x##UL
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#else
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#define INT32_C(x) x
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#define UINT32_C(x) x##U
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#endif
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#endif
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#if !defined(INT64_C) && !defined(UINT64_C)
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#if __have_long64
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#define INT64_C(x) x##L
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#define UINT64_C(x) x##UL
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#else
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#define INT64_C(x) x##LL
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#define UINT64_C(x) x##ULL
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#endif
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#endif
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#endif
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/**@}*/
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/**\name C standard macros */
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#ifndef NULL
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#ifdef __cplusplus
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#define NULL 0
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#else
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#define NULL ((void *) 0)
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#endif
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#endif
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/* #define FLOATING_POINT_REPRESENTATION */
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#define MACHINE_64_BIT
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#ifndef TRUE
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#define TRUE UINT8_C(1)
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#endif
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#ifndef FALSE
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#define FALSE UINT8_C(0)
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#endif
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/**\name I2C addresses */
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#define BME280_I2C_ADDR_PRIM UINT8_C(0x76)
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#define BME280_I2C_ADDR_SEC UINT8_C(0x77)
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/**\name BME280 chip identifier */
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#define BME280_CHIP_ID UINT8_C(0x60)
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/**\name Register Address */
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#define BME280_CHIP_ID_ADDR UINT8_C(0xD0)
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#define BME280_RESET_ADDR UINT8_C(0xE0)
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#define BME280_TEMP_PRESS_CALIB_DATA_ADDR UINT8_C(0x88)
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#define BME280_HUMIDITY_CALIB_DATA_ADDR UINT8_C(0xE1)
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#define BME280_PWR_CTRL_ADDR UINT8_C(0xF4)
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#define BME280_CTRL_HUM_ADDR UINT8_C(0xF2)
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#define BME280_CTRL_MEAS_ADDR UINT8_C(0xF4)
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#define BME280_CONFIG_ADDR UINT8_C(0xF5)
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#define BME280_DATA_ADDR UINT8_C(0xF7)
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/**\name API success code */
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#define BME280_OK INT8_C(0)
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/**\name API error codes */
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#define BME280_E_NULL_PTR INT8_C(-1)
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#define BME280_E_DEV_NOT_FOUND INT8_C(-2)
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#define BME280_E_INVALID_LEN INT8_C(-3)
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#define BME280_E_COMM_FAIL INT8_C(-4)
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#define BME280_E_SLEEP_MODE_FAIL INT8_C(-5)
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/**\name API warning codes */
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#define BME280_W_INVALID_OSR_MACRO UINT8_C(1)
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/**\name Macros related to size */
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#define BME280_TEMP_PRESS_CALIB_DATA_LEN UINT8_C(26)
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#define BME280_HUMIDITY_CALIB_DATA_LEN UINT8_C(7)
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#define BME280_P_T_H_DATA_LEN UINT8_C(8)
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/**\name Sensor power modes */
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#define BME280_SLEEP_MODE UINT8_C(0x00)
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#define BME280_FORCED_MODE UINT8_C(0x01)
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#define BME280_NORMAL_MODE UINT8_C(0x03)
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/**\name Macro to combine two 8 bit data's to form a 16 bit data */
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#define BME280_CONCAT_BYTES(msb, lsb) (((uint16_t)msb << 8) | (uint16_t)lsb)
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#define BME280_SET_BITS(reg_data, bitname, data) \
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((reg_data & ~(bitname##_MSK)) | \
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((data << bitname##_POS) & bitname##_MSK))
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#define BME280_SET_BITS_POS_0(reg_data, bitname, data) \
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((reg_data & ~(bitname##_MSK)) | \
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(data & bitname##_MSK))
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#define BME280_GET_BITS(reg_data, bitname) ((reg_data & (bitname##_MSK)) >> \
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(bitname##_POS))
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#define BME280_GET_BITS_POS_0(reg_data, bitname) (reg_data & (bitname##_MSK))
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/**\name Macros for bit masking */
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#define BME280_SENSOR_MODE_MSK UINT8_C(0x03)
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#define BME280_SENSOR_MODE_POS UINT8_C(0x00)
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#define BME280_CTRL_HUM_MSK UINT8_C(0x07)
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#define BME280_CTRL_HUM_POS UINT8_C(0x00)
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#define BME280_CTRL_PRESS_MSK UINT8_C(0x1C)
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#define BME280_CTRL_PRESS_POS UINT8_C(0x02)
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#define BME280_CTRL_TEMP_MSK UINT8_C(0xE0)
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#define BME280_CTRL_TEMP_POS UINT8_C(0x05)
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#define BME280_FILTER_MSK UINT8_C(0x1C)
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#define BME280_FILTER_POS UINT8_C(0x02)
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#define BME280_STANDBY_MSK UINT8_C(0xE0)
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#define BME280_STANDBY_POS UINT8_C(0x05)
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/**\name Sensor component selection macros
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These values are internal for API implementation. Don't relate this to
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data sheet.*/
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#define BME280_PRESS UINT8_C(1)
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#define BME280_TEMP UINT8_C(1 << 1)
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#define BME280_HUM UINT8_C(1 << 2)
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#define BME280_ALL UINT8_C(0x07)
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/**\name Settings selection macros */
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#define BME280_OSR_PRESS_SEL UINT8_C(1)
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#define BME280_OSR_TEMP_SEL UINT8_C(1 << 1)
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#define BME280_OSR_HUM_SEL UINT8_C(1 << 2)
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#define BME280_FILTER_SEL UINT8_C(1 << 3)
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#define BME280_STANDBY_SEL UINT8_C(1 << 4)
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#define BME280_ALL_SETTINGS_SEL UINT8_C(0x1F)
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/**\name Oversampling macros */
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#define BME280_NO_OVERSAMPLING UINT8_C(0x00)
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#define BME280_OVERSAMPLING_1X UINT8_C(0x01)
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#define BME280_OVERSAMPLING_2X UINT8_C(0x02)
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#define BME280_OVERSAMPLING_4X UINT8_C(0x03)
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#define BME280_OVERSAMPLING_8X UINT8_C(0x04)
|
||||
#define BME280_OVERSAMPLING_16X UINT8_C(0x05)
|
||||
|
||||
/**\name Standby duration selection macros */
|
||||
#define BME280_STANDBY_TIME_1_MS (0x00)
|
||||
#define BME280_STANDBY_TIME_62_5_MS (0x01)
|
||||
#define BME280_STANDBY_TIME_125_MS (0x02)
|
||||
#define BME280_STANDBY_TIME_250_MS (0x03)
|
||||
#define BME280_STANDBY_TIME_500_MS (0x04)
|
||||
#define BME280_STANDBY_TIME_1000_MS (0x05)
|
||||
#define BME280_STANDBY_TIME_10_MS (0x06)
|
||||
#define BME280_STANDBY_TIME_20_MS (0x07)
|
||||
|
||||
/**\name Filter coefficient selection macros */
|
||||
#define BME280_FILTER_COEFF_OFF (0x00)
|
||||
#define BME280_FILTER_COEFF_2 (0x01)
|
||||
#define BME280_FILTER_COEFF_4 (0x02)
|
||||
#define BME280_FILTER_COEFF_8 (0x03)
|
||||
#define BME280_FILTER_COEFF_16 (0x04)
|
||||
|
||||
/*!
|
||||
* @brief Interface selection Enums
|
||||
*/
|
||||
enum bme280_intf {
|
||||
/*! SPI interface */
|
||||
BME280_SPI_INTF,
|
||||
/*! I2C interface */
|
||||
BME280_I2C_INTF
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief Type definitions
|
||||
*/
|
||||
typedef int8_t (*bme280_com_fptr_t)(uint8_t dev_id, uint8_t reg_addr,
|
||||
uint8_t *data, uint16_t len);
|
||||
|
||||
typedef void (*bme280_delay_fptr_t)(uint32_t period);
|
||||
|
||||
/*!
|
||||
* @brief Calibration data
|
||||
*/
|
||||
struct bme280_calib_data {
|
||||
/**
|
||||
* @ Trim Variables
|
||||
*/
|
||||
/**@{*/
|
||||
uint16_t dig_T1;
|
||||
int16_t dig_T2;
|
||||
int16_t dig_T3;
|
||||
uint16_t dig_P1;
|
||||
int16_t dig_P2;
|
||||
int16_t dig_P3;
|
||||
int16_t dig_P4;
|
||||
int16_t dig_P5;
|
||||
int16_t dig_P6;
|
||||
int16_t dig_P7;
|
||||
int16_t dig_P8;
|
||||
int16_t dig_P9;
|
||||
uint8_t dig_H1;
|
||||
int16_t dig_H2;
|
||||
uint8_t dig_H3;
|
||||
int16_t dig_H4;
|
||||
int16_t dig_H5;
|
||||
int8_t dig_H6;
|
||||
int32_t t_fine;
|
||||
/**@}*/
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief bme280 sensor structure which comprises of temperature, pressure and
|
||||
* humidity data
|
||||
*/
|
||||
#ifdef FLOATING_POINT_REPRESENTATION
|
||||
struct bme280_data {
|
||||
/*! Compensated pressure */
|
||||
double pressure;
|
||||
/*! Compensated temperature */
|
||||
double temperature;
|
||||
/*! Compensated humidity */
|
||||
double humidity;
|
||||
};
|
||||
#else
|
||||
struct bme280_data {
|
||||
/*! Compensated pressure */
|
||||
uint32_t pressure;
|
||||
/*! Compensated temperature */
|
||||
int32_t temperature;
|
||||
/*! Compensated humidity */
|
||||
uint32_t humidity;
|
||||
};
|
||||
#endif /* BME280_USE_FLOATING_POINT */
|
||||
|
||||
/*!
|
||||
* @brief bme280 sensor structure which comprises of uncompensated temperature,
|
||||
* pressure and humidity data
|
||||
*/
|
||||
struct bme280_uncomp_data {
|
||||
/*! un-compensated pressure */
|
||||
uint32_t pressure;
|
||||
/*! un-compensated temperature */
|
||||
uint32_t temperature;
|
||||
/*! un-compensated humidity */
|
||||
uint32_t humidity;
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief bme280 sensor settings structure which comprises of mode,
|
||||
* oversampling and filter settings.
|
||||
*/
|
||||
struct bme280_settings {
|
||||
/*! pressure oversampling */
|
||||
uint8_t osr_p;
|
||||
/*! temperature oversampling */
|
||||
uint8_t osr_t;
|
||||
/*! humidity oversampling */
|
||||
uint8_t osr_h;
|
||||
/*! filter coefficient */
|
||||
uint8_t filter;
|
||||
/*! standby time */
|
||||
uint8_t standby_time;
|
||||
};
|
||||
|
||||
/*!
|
||||
* @brief bme280 device structure
|
||||
*/
|
||||
struct bme280_dev {
|
||||
/*! Chip Id */
|
||||
uint8_t chip_id;
|
||||
/*! Device Id */
|
||||
uint8_t id;
|
||||
/*! SPI/I2C interface */
|
||||
enum bme280_intf interface;
|
||||
/*! Read function pointer */
|
||||
bme280_com_fptr_t read;
|
||||
/*! Write function pointer */
|
||||
bme280_com_fptr_t write;
|
||||
/*! Delay function pointer */
|
||||
bme280_delay_fptr_t delay_ms;
|
||||
/*! Trim data */
|
||||
struct bme280_calib_data calib_data;
|
||||
/*! Sensor settings */
|
||||
struct bme280_settings settings;
|
||||
};
|
||||
|
||||
#endif /* BME280_DEFS_H_ */
|
||||
/** @}*/
|
||||
/** @}*/
|
||||
464
bme280_support.c
464
bme280_support.c
@ -1,464 +0,0 @@
|
||||
/*
|
||||
****************************************************************************
|
||||
* Copyright (C) 2015 - 2016 Bosch Sensortec GmbH
|
||||
*
|
||||
* bme280_support.c
|
||||
* Date: 2016/07/04
|
||||
* Revision: 1.0.6 $
|
||||
*
|
||||
* Usage: Sensor Driver support file for BME280 sensor
|
||||
*
|
||||
****************************************************************************
|
||||
* License:
|
||||
*
|
||||
* 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.
|
||||
**************************************************************************/
|
||||
/*---------------------------------------------------------------------------*/
|
||||
/* Includes*/
|
||||
/*---------------------------------------------------------------------------*/
|
||||
#include "bme280.h"
|
||||
|
||||
#define BME280_API
|
||||
/*Enable the macro BME280_API to use this support file */
|
||||
/*----------------------------------------------------------------------------*
|
||||
* The following functions are used for reading and writing of
|
||||
* sensor data using I2C or SPI communication
|
||||
*----------------------------------------------------------------------------*/
|
||||
#ifdef BME280_API
|
||||
/* \Brief: The function is used as I2C bus read
|
||||
* \Return : Status of the I2C read
|
||||
* \param dev_addr : The device address of the sensor
|
||||
* \param reg_addr : Address of the first register, will data is going to be read
|
||||
* \param reg_data : This data read from the sensor, which is hold in an array
|
||||
* \param cnt : The no of byte of data to be read
|
||||
*/
|
||||
s8 BME280_I2C_bus_read(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt);
|
||||
/* \Brief: The function is used as I2C bus write
|
||||
* \Return : Status of the I2C write
|
||||
* \param dev_addr : The device address of the sensor
|
||||
* \param reg_addr : Address of the first register, will data is going to be written
|
||||
* \param reg_data : It is a value hold in the array,
|
||||
* will be used for write the value into the register
|
||||
* \param cnt : The no of byte of data to be write
|
||||
*/
|
||||
s8 BME280_I2C_bus_write(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt);
|
||||
/* \Brief: The function is used as SPI bus write
|
||||
* \Return : Status of the SPI write
|
||||
* \param dev_addr : The device address of the sensor
|
||||
* \param reg_addr : Address of the first register, will data is going to be written
|
||||
* \param reg_data : It is a value hold in the array,
|
||||
* will be used for write the value into the register
|
||||
* \param cnt : The no of byte of data to be write
|
||||
*/
|
||||
s8 BME280_SPI_bus_write(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt);
|
||||
/* \Brief: The function is used as SPI bus read
|
||||
* \Return : Status of the SPI read
|
||||
* \param dev_addr : The device address of the sensor
|
||||
* \param reg_addr : Address of the first register, will data is going to be read
|
||||
* \param reg_data : This data read from the sensor, which is hold in an array
|
||||
* \param cnt : The no of byte of data to be read */
|
||||
s8 BME280_SPI_bus_read(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt);
|
||||
/*
|
||||
* \Brief: SPI/I2C init routine
|
||||
*/
|
||||
s8 I2C_routine(void);
|
||||
s8 SPI_routine(void);
|
||||
#endif
|
||||
/********************End of I2C/SPI function declarations***********************/
|
||||
/* Brief : The delay routine
|
||||
* \param : delay in ms
|
||||
*/
|
||||
void BME280_delay_msek(u32 msek);
|
||||
/* This function is an example for reading sensor data
|
||||
* \param: None
|
||||
* \return: communication result
|
||||
*/
|
||||
s32 bme280_data_readout_template(void);
|
||||
/*----------------------------------------------------------------------------*
|
||||
* struct bme280_t parameters can be accessed by using bme280
|
||||
* bme280_t having the following parameters
|
||||
* Bus write function pointer: BME280_WR_FUNC_PTR
|
||||
* Bus read function pointer: BME280_RD_FUNC_PTR
|
||||
* Delay function pointer: delay_msec
|
||||
* I2C address: dev_addr
|
||||
* Chip id of the sensor: chip_id
|
||||
*---------------------------------------------------------------------------*/
|
||||
struct bme280_t bme280;
|
||||
/* This function is an example for reading sensor data
|
||||
* \param: None
|
||||
* \return: communication result
|
||||
*/
|
||||
s32 bme280_data_readout_template(void)
|
||||
{
|
||||
/* The variable used to assign the standby time*/
|
||||
u8 v_stand_by_time_u8 = BME280_INIT_VALUE;
|
||||
/* The variable used to read uncompensated temperature*/
|
||||
s32 v_data_uncomp_temp_s32 = BME280_INIT_VALUE;
|
||||
/* The variable used to read uncompensated pressure*/
|
||||
s32 v_data_uncomp_pres_s32 = BME280_INIT_VALUE;
|
||||
/* The variable used to read uncompensated pressure*/
|
||||
s32 v_data_uncomp_hum_s32 = BME280_INIT_VALUE;
|
||||
/* The variable used to read compensated temperature*/
|
||||
s32 v_comp_temp_s32[2] = {BME280_INIT_VALUE, BME280_INIT_VALUE};
|
||||
/* The variable used to read compensated pressure*/
|
||||
u32 v_comp_press_u32[2] = {BME280_INIT_VALUE, BME280_INIT_VALUE};
|
||||
/* The variable used to read compensated humidity*/
|
||||
u32 v_comp_humidity_u32[2] = {BME280_INIT_VALUE, BME280_INIT_VALUE};
|
||||
|
||||
/* result of communication results*/
|
||||
s32 com_rslt = ERROR;
|
||||
|
||||
|
||||
|
||||
/*********************** START INITIALIZATION ************************/
|
||||
/* Based on the user need configure I2C or SPI interface.
|
||||
* It is example code to explain how to use the bme280 API*/
|
||||
#ifdef BME280_API
|
||||
I2C_routine();
|
||||
/*SPI_routine();*/
|
||||
#endif
|
||||
/*--------------------------------------------------------------------------*
|
||||
* This function used to assign the value/reference of
|
||||
* the following parameters
|
||||
* I2C address
|
||||
* Bus Write
|
||||
* Bus read
|
||||
* Chip id
|
||||
*-------------------------------------------------------------------------*/
|
||||
com_rslt = bme280_init(&bme280);
|
||||
|
||||
/* For initialization it is required to set the mode of
|
||||
* the sensor as "NORMAL"
|
||||
* data acquisition/read/write is possible in this mode
|
||||
* by using the below API able to set the power mode as NORMAL*/
|
||||
/* Set the power mode as NORMAL*/
|
||||
com_rslt += bme280_set_power_mode(BME280_NORMAL_MODE);
|
||||
/* For reading the pressure, humidity and temperature data it is required to
|
||||
* set the OSS setting of humidity, pressure and temperature
|
||||
* The "BME280_CTRLHUM_REG_OSRSH" register sets the humidity
|
||||
* data acquisition options of the device.
|
||||
* changes to this registers only become effective after a write operation to
|
||||
* "BME280_CTRLMEAS_REG" register.
|
||||
* In the code automated reading and writing of "BME280_CTRLHUM_REG_OSRSH"
|
||||
* register first set the "BME280_CTRLHUM_REG_OSRSH" and then read and write
|
||||
* the "BME280_CTRLMEAS_REG" register in the function*/
|
||||
com_rslt += bme280_set_oversamp_humidity(BME280_OVERSAMP_1X);
|
||||
|
||||
/* set the pressure oversampling*/
|
||||
com_rslt += bme280_set_oversamp_pressure(BME280_OVERSAMP_2X);
|
||||
/* set the temperature oversampling*/
|
||||
com_rslt += bme280_set_oversamp_temperature(BME280_OVERSAMP_4X);
|
||||
/*--------------------------------------------------------------------------*/
|
||||
/*------------------------------------------------------------------------*
|
||||
************************* START GET and SET FUNCTIONS DATA ****************
|
||||
*---------------------------------------------------------------------------*/
|
||||
/* This API used to Write the standby time of the sensor input
|
||||
* value have to be given
|
||||
* Normal mode comprises an automated perpetual cycling between an (active)
|
||||
* Measurement period and an (inactive) standby period.
|
||||
* The standby time is determined by the contents of the register t_sb.
|
||||
* Standby time can be set using BME280_STANDBYTIME_125_MS.
|
||||
* Usage Hint : bme280_set_standbydur(BME280_STANDBYTIME_125_MS)*/
|
||||
|
||||
com_rslt += bme280_set_standby_durn(BME280_STANDBY_TIME_1_MS);
|
||||
|
||||
/* This API used to read back the written value of standby time*/
|
||||
com_rslt += bme280_get_standby_durn(&v_stand_by_time_u8);
|
||||
/*-----------------------------------------------------------------*
|
||||
************************* END GET and SET FUNCTIONS ****************
|
||||
*------------------------------------------------------------------*/
|
||||
|
||||
/************************* END INITIALIZATION *************************/
|
||||
|
||||
/*------------------------------------------------------------------*
|
||||
************ START READ UNCOMPENSATED PRESSURE, TEMPERATURE
|
||||
AND HUMIDITY DATA ********
|
||||
*---------------------------------------------------------------------*/
|
||||
/* API is used to read the uncompensated temperature*/
|
||||
com_rslt += bme280_read_uncomp_temperature(&v_data_uncomp_temp_s32);
|
||||
|
||||
/* API is used to read the uncompensated pressure*/
|
||||
com_rslt += bme280_read_uncomp_pressure(&v_data_uncomp_pres_s32);
|
||||
|
||||
/* API is used to read the uncompensated humidity*/
|
||||
com_rslt += bme280_read_uncomp_humidity(&v_data_uncomp_hum_s32);
|
||||
|
||||
/* API is used to read the uncompensated temperature,pressure
|
||||
and humidity data */
|
||||
com_rslt += bme280_read_uncomp_pressure_temperature_humidity(
|
||||
&v_data_uncomp_temp_s32, &v_data_uncomp_pres_s32, &v_data_uncomp_hum_s32);
|
||||
/*--------------------------------------------------------------------*
|
||||
************ END READ UNCOMPENSATED PRESSURE AND TEMPERATURE********
|
||||
*-------------------------------------------------------------------------*/
|
||||
|
||||
/*------------------------------------------------------------------*
|
||||
************ START READ COMPENSATED PRESSURE, TEMPERATURE
|
||||
AND HUMIDITY DATA ********
|
||||
*---------------------------------------------------------------------*/
|
||||
/* API is used to compute the compensated temperature*/
|
||||
v_comp_temp_s32[0] = bme280_compensate_temperature_int32(
|
||||
v_data_uncomp_temp_s32);
|
||||
|
||||
/* API is used to compute the compensated pressure*/
|
||||
v_comp_press_u32[0] = bme280_compensate_pressure_int32(
|
||||
v_data_uncomp_pres_s32);
|
||||
|
||||
/* API is used to compute the compensated humidity*/
|
||||
v_comp_humidity_u32[0] = bme280_compensate_humidity_int32(
|
||||
v_data_uncomp_hum_s32);
|
||||
|
||||
/* API is used to read the compensated temperature, humidity and pressure*/
|
||||
com_rslt += bme280_read_pressure_temperature_humidity(
|
||||
&v_comp_press_u32[1], &v_comp_temp_s32[1], &v_comp_humidity_u32[1]);
|
||||
/*--------------------------------------------------------------------*
|
||||
************ END READ COMPENSATED PRESSURE, TEMPERATURE AND HUMIDITY ********
|
||||
*-------------------------------------------------------------------------*/
|
||||
|
||||
/*-----------------------------------------------------------------------*
|
||||
************************* START DE-INITIALIZATION ***********************
|
||||
*-------------------------------------------------------------------------*/
|
||||
/* For de-initialization it is required to set the mode of
|
||||
* the sensor as "SLEEP"
|
||||
* the device reaches the lowest power consumption only
|
||||
* In SLEEP mode no measurements are performed
|
||||
* All registers are accessible
|
||||
* by using the below API able to set the power mode as SLEEP*/
|
||||
/* Set the power mode as SLEEP*/
|
||||
com_rslt += bme280_set_power_mode(BME280_SLEEP_MODE);
|
||||
/*---------------------------------------------------------------------*
|
||||
************************* END DE-INITIALIZATION **********************
|
||||
*---------------------------------------------------------------------*/
|
||||
return com_rslt;
|
||||
}
|
||||
|
||||
#ifdef BME280_API
|
||||
#define SPI_READ 0x80
|
||||
#define SPI_WRITE 0x7F
|
||||
#define BME280_DATA_INDEX 1
|
||||
#define BME280_ADDRESS_INDEX 2
|
||||
/*--------------------------------------------------------------------------*
|
||||
* The following function is used to map the I2C bus read, write, delay and
|
||||
* device address with global structure bme280
|
||||
*-------------------------------------------------------------------------*/
|
||||
s8 I2C_routine(void) {
|
||||
/*--------------------------------------------------------------------------*
|
||||
* By using bme280 the following structure parameter can be accessed
|
||||
* Bus write function pointer: BME280_WR_FUNC_PTR
|
||||
* Bus read function pointer: BME280_RD_FUNC_PTR
|
||||
* Delay function pointer: delay_msec
|
||||
* I2C address: dev_addr
|
||||
*--------------------------------------------------------------------------*/
|
||||
bme280.bus_write = BME280_I2C_bus_write;
|
||||
bme280.bus_read = BME280_I2C_bus_read;
|
||||
bme280.dev_addr = BME280_I2C_ADDRESS2;
|
||||
bme280.delay_msec = BME280_delay_msek;
|
||||
|
||||
return BME280_INIT_VALUE;
|
||||
}
|
||||
|
||||
/*---------------------------------------------------------------------------*
|
||||
* The following function is used to map the SPI bus read, write and delay
|
||||
* with global structure bme280
|
||||
*--------------------------------------------------------------------------*/
|
||||
s8 SPI_routine(void) {
|
||||
/*--------------------------------------------------------------------------*
|
||||
* By using bme280 the following structure parameter can be accessed
|
||||
* Bus write function pointer: BME280_WR_FUNC_PTR
|
||||
* Bus read function pointer: BME280_RD_FUNC_PTR
|
||||
* Delay function pointer: delay_msec
|
||||
*--------------------------------------------------------------------------*/
|
||||
|
||||
bme280.bus_write = BME280_SPI_bus_write;
|
||||
bme280.bus_read = BME280_SPI_bus_read;
|
||||
bme280.delay_msec = BME280_delay_msek;
|
||||
|
||||
return BME280_INIT_VALUE;
|
||||
}
|
||||
|
||||
/************** I2C/SPI buffer length ******/
|
||||
#define I2C_BUFFER_LEN 8
|
||||
#define SPI_BUFFER_LEN 5
|
||||
|
||||
/*-------------------------------------------------------------------*
|
||||
* This is a sample code for read and write the data by using I2C/SPI
|
||||
* Use either I2C or SPI based on your need
|
||||
* The device address defined in the bme280.h file
|
||||
*-----------------------------------------------------------------------*/
|
||||
/* \Brief: The function is used as I2C bus write
|
||||
* \Return : Status of the I2C write
|
||||
* \param dev_addr : The device address of the sensor
|
||||
* \param reg_addr : Address of the first register, will data is going to be written
|
||||
* \param reg_data : It is a value hold in the array,
|
||||
* will be used for write the value into the register
|
||||
* \param cnt : The no of byte of data to be write
|
||||
*/
|
||||
s8 BME280_I2C_bus_write(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt)
|
||||
{
|
||||
s32 iError = BME280_INIT_VALUE;
|
||||
u8 array[I2C_BUFFER_LEN];
|
||||
u8 stringpos = BME280_INIT_VALUE;
|
||||
array[BME280_INIT_VALUE] = reg_addr;
|
||||
for (stringpos = BME280_INIT_VALUE; stringpos < cnt; stringpos++) {
|
||||
array[stringpos + BME280_DATA_INDEX] = *(reg_data + stringpos);
|
||||
}
|
||||
/*
|
||||
* Please take the below function as your reference for
|
||||
* write the data using I2C communication
|
||||
* "IERROR = I2C_WRITE_STRING(DEV_ADDR, array, cnt+1)"
|
||||
* add your I2C write function here
|
||||
* iError is an return value of I2C read function
|
||||
* Please select your valid return value
|
||||
* In the driver SUCCESS defined as 0
|
||||
* and FAILURE defined as -1
|
||||
* Note :
|
||||
* This is a full duplex operation,
|
||||
* The first read data is discarded, for that extra write operation
|
||||
* have to be initiated. For that cnt+1 operation done in the I2C write string function
|
||||
* For more information please refer data sheet SPI communication:
|
||||
*/
|
||||
return (s8)iError;
|
||||
}
|
||||
|
||||
/* \Brief: The function is used as I2C bus read
|
||||
* \Return : Status of the I2C read
|
||||
* \param dev_addr : The device address of the sensor
|
||||
* \param reg_addr : Address of the first register, will data is going to be read
|
||||
* \param reg_data : This data read from the sensor, which is hold in an array
|
||||
* \param cnt : The no of data byte of to be read
|
||||
*/
|
||||
s8 BME280_I2C_bus_read(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt)
|
||||
{
|
||||
s32 iError = BME280_INIT_VALUE;
|
||||
u8 array[I2C_BUFFER_LEN] = {BME280_INIT_VALUE};
|
||||
u8 stringpos = BME280_INIT_VALUE;
|
||||
array[BME280_INIT_VALUE] = reg_addr;
|
||||
/* Please take the below function as your reference
|
||||
* for read the data using I2C communication
|
||||
* add your I2C rad function here.
|
||||
* "IERROR = I2C_WRITE_READ_STRING(DEV_ADDR, ARRAY, ARRAY, 1, CNT)"
|
||||
* iError is an return value of SPI write function
|
||||
* Please select your valid return value
|
||||
* In the driver SUCCESS defined as 0
|
||||
* and FAILURE defined as -1
|
||||
*/
|
||||
for (stringpos = BME280_INIT_VALUE; stringpos < cnt; stringpos++) {
|
||||
*(reg_data + stringpos) = array[stringpos];
|
||||
}
|
||||
return (s8)iError;
|
||||
}
|
||||
|
||||
/* \Brief: The function is used as SPI bus read
|
||||
* \Return : Status of the SPI read
|
||||
* \param dev_addr : The device address of the sensor
|
||||
* \param reg_addr : Address of the first register, will data is going to be read
|
||||
* \param reg_data : This data read from the sensor, which is hold in an array
|
||||
* \param cnt : The no of byte of data to be read
|
||||
*/
|
||||
s8 BME280_SPI_bus_read(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt)
|
||||
{
|
||||
s32 iError=BME280_INIT_VALUE;
|
||||
u8 array[SPI_BUFFER_LEN]={0,};
|
||||
u8 stringpos;
|
||||
/* For the SPI mode only 7 bits of register addresses are used.
|
||||
The MSB of register address is declared the bit what functionality it is
|
||||
read/write (read as 1/write as BME280_INIT_VALUE)*/
|
||||
array[BME280_INIT_VALUE] = reg_addr|SPI_READ;/*read routine is initiated register address is mask with 0x80*/
|
||||
/*
|
||||
* Please take the below function as your reference for
|
||||
* read the data using SPI communication
|
||||
* " IERROR = SPI_READ_WRITE_STRING(ARRAY, ARRAY, CNT+1)"
|
||||
* add your SPI read function here
|
||||
* iError is an return value of SPI read function
|
||||
* Please select your valid return value
|
||||
* In the driver SUCCESS defined as 0
|
||||
* and FAILURE defined as -1
|
||||
* Note :
|
||||
* This is a full duplex operation,
|
||||
* The first read data is discarded, for that extra write operation
|
||||
* have to be initiated. For that cnt+1 operation done in the SPI read
|
||||
* and write string function
|
||||
* For more information please refer data sheet SPI communication:
|
||||
*/
|
||||
for (stringpos = BME280_INIT_VALUE; stringpos < cnt; stringpos++) {
|
||||
*(reg_data + stringpos) = array[stringpos+BME280_DATA_INDEX];
|
||||
}
|
||||
return (s8)iError;
|
||||
}
|
||||
|
||||
/* \Brief: The function is used as SPI bus write
|
||||
* \Return : Status of the SPI write
|
||||
* \param dev_addr : The device address of the sensor
|
||||
* \param reg_addr : Address of the first register, where data is to be written
|
||||
* \param reg_data : It is a value hold in the array,
|
||||
* will be used for write the value into the register
|
||||
* \param cnt : The no of byte of data to be write
|
||||
*/
|
||||
s8 BME280_SPI_bus_write(u8 dev_addr, u8 reg_addr, u8 *reg_data, u8 cnt)
|
||||
{
|
||||
s32 iError = BME280_INIT_VALUE;
|
||||
u8 array[SPI_BUFFER_LEN * BME280_ADDRESS_INDEX];
|
||||
u8 stringpos = BME280_INIT_VALUE;
|
||||
u8 index = BME280_INIT_VALUE;
|
||||
for (stringpos = BME280_INIT_VALUE; stringpos < cnt; stringpos++) {
|
||||
/* the operation of (reg_addr++)&0x7F done as per the
|
||||
SPI communication protocol specified in the data sheet*/
|
||||
index = stringpos * BME280_ADDRESS_INDEX;
|
||||
array[index] = (reg_addr++) & SPI_WRITE;
|
||||
array[index + BME280_DATA_INDEX] = *(reg_data + stringpos);
|
||||
}
|
||||
/* Please take the below function as your reference
|
||||
* for write the data using SPI communication
|
||||
* add your SPI write function here.
|
||||
* "IERROR = SPI_WRITE_STRING(ARRAY, CNT*2)"
|
||||
* iError is an return value of SPI write function
|
||||
* Please select your valid return value
|
||||
* In the driver SUCCESS defined as 0
|
||||
* and FAILURE defined as -1
|
||||
*/
|
||||
return (s8)iError;
|
||||
}
|
||||
|
||||
/* Brief : The delay routine
|
||||
* \param : delay in ms
|
||||
*/
|
||||
void BME280_delay_msek(u32 msek)
|
||||
{
|
||||
/*Here you can write your own delay routine*/
|
||||
}
|
||||
#endif
|
||||
25
changelog.md
Normal file
25
changelog.md
Normal file
@ -0,0 +1,25 @@
|
||||
# Change Log
|
||||
All notable changes to BME280 Sensor API will be documented in this file.
|
||||
|
||||
## v3.2.0, 21 Mar 2017
|
||||
### Changed
|
||||
- API for putting sensor into sleep mode changed.
|
||||
- Pressure, Temperature out of range data clipped.
|
||||
- 64 bit pressure compensation changed.
|
||||
## v3.1.0, 8 Mar 2017
|
||||
### Added
|
||||
- Device settings APIs.
|
||||
- Compensations functions, double datatype for Pressure, Temperature and Humidity.
|
||||
- Compensations functions, integer datatype 64bit for Pressure.
|
||||
### Changed
|
||||
- Internal functions related to power mode.
|
||||
|
||||
## v3.0.0, 17 Feb 2017
|
||||
### Added
|
||||
Below functionalities are supported
|
||||
- Init.
|
||||
- Soft reset.
|
||||
- Power mode.
|
||||
- Compensated functions, integer datatype for Pressure, Temperature and Humidity.
|
||||
- Get sensor data.
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user