mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-17 05:10:54 +00:00
Support for BME280 added.
new file: dev/bme280/README.bme280 new file: dev/bme280/bme280-sensor.c new file: dev/bme280/bme280-sensor.h new file: dev/bme280/bme280.c new file: dev/bme280/bme280.h
This commit is contained in:
Robert Olsson
Antonio Lignan
parent
1abc95a08e
commit
cfabf0e6a2
26
dev/bme280/README.bme280
Normal file
26
dev/bme280/README.bme280
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@ -0,0 +1,26 @@
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Contiki implementation for Bosch Sensortec BME280 sensor.
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BME280 is compact and fast and includes temp, RH, and pressure.
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Chip uses I2C or SPI. This implementation and follow Contiki
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device API and I2C.
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For better performance, less chip warm up and less I2C transactions
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burst read is recommended. Here all T/RH/P is read in one single
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I2C read and kept the measurements have the same time.
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The burst read is stored in struct bme280_mea which accessible from
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the Contiki. Also note that the full chip resolution is available.
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The variables are overscaled to give the app full controlover resolution.
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See bme280.h
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The pressure can be calculated with 32 or 64. The define BME280_64BIT
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controls this. Typically in your project-conf.h
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Implemented according to datasheet Rev 1.1.
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Limitations:
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Implementation implements Weather Mode which uses forced one-shot
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mode no oversampling nor filters and reads all T/RH/P in one read.
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82
dev/bme280/bme280-sensor.c
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82
dev/bme280/bme280-sensor.c
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/*
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* Copyright (c) 2015, Copyright Robert Olsson
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* All rights reserved.
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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
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|
* are met:
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||||||
|
* 1. 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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||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* 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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|
* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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||||||
|
*
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|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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||||||
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*
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* Author : Robert Olsson rolss@kth.se/robert@radio-sensors.com
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* Created : 2016-09-14
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*/
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#include <stdlib.h>
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#include "contiki.h"
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#include "lib/sensors.h"
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#include "dev/bme280/bme280.h"
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#include "dev/bme280/bme280-sensor.h"
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const struct sensors_sensor bme280_sensor;
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static int
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value(int type)
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{
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/* Read all measurements with one burst read */
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bme280_read(BME280_MODE_WEATHER);
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/* Return a la Contiki API */
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switch(type) {
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case BME280_SENSOR_TEMP:
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return bme280_mea.t_overscale100 / 100;
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case BME280_SENSOR_HUMIDITY:
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return bme280_mea.h_overscale1024>>10;
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case BME280_SENSOR_PRESSURE:
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/* Scale down w. 10 not to overslow the signed int */
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#ifdef BME280_64BIT
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return bme280_mea.p_overscale256/(256*10);
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#else
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return bme280_mea.p/10;
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#endif
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}
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return 0;
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}
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static int
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status(int type)
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{
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return 0;
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}
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static int
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configure(int type, int c)
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{
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bme280_init(BME280_MODE_WEATHER);
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}
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SENSORS_SENSOR(bme280_sensor, "bme280", value, configure, status);
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49
dev/bme280/bme280-sensor.h
Normal file
49
dev/bme280/bme280-sensor.h
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@ -0,0 +1,49 @@
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/*
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* Copyright (c) 2015, Copyright Robert Olsson
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* All rights reserved.
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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
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* are met:
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|
* 1. 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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|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* 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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|
* 3. Neither the name of the Institute nor the names of its contributors
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|
* may be used to endorse or promote products derived from this software
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|
* without specific prior written permission.
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|
*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*
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* Author : Robert Olsson rolss@kth.se/robert@radio-sensors.com
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* Created : 2016-09-14
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*/
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#ifndef BME280_SENSOR_H_
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#define BME280_SENSOR_H_
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#include "lib/sensors.h"
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#include "lib/sensors.h"
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#include "bme280.h"
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extern const struct sensors_sensor bme280_sensor;
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#define BME280_SENSOR_TEMP 0
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#define BME280_SENSOR_HUMIDITY 1
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#define BME280_SENSOR_PRESSURE 2
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#endif /* BME280_SENSOR_H_ */
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272
dev/bme280/bme280.c
Normal file
272
dev/bme280/bme280.c
Normal file
@ -0,0 +1,272 @@
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/*
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* Copyright (c) 2015, Copyright Robert Olsson
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* All rights reserved.
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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
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* are met:
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|
* 1. 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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|
* 2. 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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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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|
*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*
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* Author : Robert Olsson rolss@kth.se/robert@radio-sensors.com
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* Created : 2016-09-14
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*/
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/**
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* \file
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* Basic functions for Bosch BME280 based on datasheel Rev 1.1
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*/
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#include "contiki.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include <math.h>
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#include "bme280.h"
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#include "dev/bme280-arch.h"
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static struct {
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unsigned short dig_t1;
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signed short dig_t2;
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signed short dig_t3;
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unsigned short dig_p1;
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signed short dig_p2;
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signed short dig_p3;
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signed short dig_p4;
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signed short dig_p5;
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signed short dig_p6;
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signed short dig_p7;
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signed short dig_p8;
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signed short dig_p9;
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unsigned char dig_h1;
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signed short dig_h2;
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unsigned char dig_h3;
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signed short dig_h4;
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signed short dig_h5;
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signed char dig_h6;
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int32_t t_fine;
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uint8_t mode;
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} bm;
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int32_t
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bme280_t_overscale100(int32_t ut)
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{
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int32_t v1, v2, t;
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v1 = ((((ut >> 3) - ((int32_t)bm.dig_t1 << 1))) *
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((int32_t)bm.dig_t2)) >> 11;
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v2 = (((((ut >> 4) - ((int32_t)bm.dig_t1)) * ((ut >> 4) -
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((int32_t)bm.dig_t1))) >> 12) * ((int32_t)bm.dig_t3)) >> 14;
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bm.t_fine = v1 + v2;
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t = (bm.t_fine * 5 + 128) >> 8;
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return t;
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}
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#ifdef BME280_32BIT
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static uint32_t
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bme280_p(int32_t up)
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{
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int32_t v1, v2;
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uint32_t p;
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v1 = (((int32_t)bm.t_fine) >> 1) - (int32_t)64000;
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v2 = (((v1 >> 2) * (v1 >> 2)) >> 11) * ((int32_t)bm.dig_p6);
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v2 = v2 + ((v1 * ((int32_t)bm.dig_p5)) << 1);
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v2 = (v2 >> 2) + (((int32_t)bm.dig_p4) << 16);
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v1 = (((bm.dig_p3 * (((v1 >> 2) * (v1 >> 2)) >> 13)) >> 3) +
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((((int32_t)bm.dig_p2) * v1) >> 1)) >> 18;
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v1 = ((((32768 + v1)) * ((int32_t)bm.dig_p1)) >> 15);
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if(v1 == 0) {
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return 0;
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}
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p = (((uint32_t)(((int32_t)1048576) - up) - (v2 >> 12))) * 3125;
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if(p < 0x80000000) {
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p = (p << 1) / ((uint32_t)v1);
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} else {
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p = (p / (uint32_t)v1) * 2;
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}
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v1 = (((int32_t)bm.dig_p9) * ((int32_t)(((p >> 3) * (p >> 3)) >> 13))) >> 12;
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v2 = (((int32_t)(p >> 2)) * ((int32_t)bm.dig_p8)) >> 13;
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p = (uint32_t)((int32_t)p + ((v1 + v2 + bm.dig_p7) >> 4));
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return p;
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}
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#else
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static uint32_t
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bme280_p_overscale256(int32_t up)
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{
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int64_t v1, v2, p;
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v1 = ((int64_t)bm.t_fine) - 128000;
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v2 = v1 * v1 * (int64_t)bm.dig_p6;
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v2 = v2 + ((v1 * (int64_t)bm.dig_p5) << 17);
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v2 = v2 + (((int64_t)bm.dig_p4) << 35);
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v1 = ((v1 * v1 * (int64_t)bm.dig_p3) >> 8) + ((v1 * (int64_t)bm.dig_p2) << 12);
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v1 = (((((int64_t)1) << 47) + v1)) * ((int64_t)bm.dig_p1) >> 33;
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if(v1 == 0) {
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return 0;
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}
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p = 1048576 - up;
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p = (((p << 31) - v2) * 3125) / v1;
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v1 = (((int64_t)bm.dig_p9) * (p >> 13) * (p >> 13)) >> 25;
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v2 = (((int64_t)bm.dig_p8) * p) >> 19;
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p = (((p + v1 + v2) >> 8) + (((int64_t)bm.dig_p7) << 4));
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return (uint32_t)p;
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}
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#endif
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static uint32_t
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bme280_h_overscale1024(int32_t uh)
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|
{
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int32_t v1;
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|
v1 = (bm.t_fine - ((int32_t)76800));
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v1 = (((((uh << 14) - (((int32_t)bm.dig_h4) << 20) - (((int32_t)bm.dig_h5) * v1)) + ((int32_t)16384)) >> 15)
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* (((((((v1 * ((int32_t)bm.dig_h6)) >> 10) * (((v1 * ((int32_t)bm.dig_h3)) >> 11) + ((int32_t)32768)))
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>> 10) + ((int32_t)2097152)) * ((int32_t)bm.dig_h2) + 8192) >> 14));
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v1 = (v1 - (((((v1 >> 15) * (v1 >> 15)) >> 7) * ((int32_t)bm.dig_h1)) >> 4));
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v1 = (v1 < 0 ? 0 : v1);
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v1 = (v1 > 419430400 ? 419430400 : v1);
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return (uint32_t)(v1 >> 12);
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}
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void
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bme280_init(uint8_t mode)
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{
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uint8_t buf[26];
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/* Do not mess with other chips */
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i2c_read_mem(BME280_ADDR, 0xD0, buf, 1);
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if(buf[0] != BME280_CHIP_ID) {
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|
return;
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|
}
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|
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i2c_write_mem(BME280_ADDR, BME280_CNTL_RESET, 0xB6);
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clock_delay_msec(BME280_MAX_WAIT);
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|
memset(buf, 0, sizeof(buf));
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|
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/* Burst read of all calibration part 1 */
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|
i2c_read_mem(BME280_ADDR, BME280_DIG_T1_ADDR, buf, sizeof(buf));
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bm.dig_t1 = ((uint16_t)buf[1] << 8) | (uint16_t)buf[0];
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bm.dig_t2 = ((int16_t)buf[3] << 8) | (uint16_t)buf[2];
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bm.dig_t3 = ((int16_t)buf[5] << 8) | (uint16_t)buf[4];
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||||||
|
bm.dig_p1 = ((uint16_t)buf[7] << 8) | (uint16_t)buf[6];
|
||||||
|
bm.dig_p2 = ((int16_t)buf[9] << 8) | (uint16_t)buf[8];
|
||||||
|
bm.dig_p3 = ((int16_t)buf[11] << 8) | (uint16_t)buf[10];
|
||||||
|
bm.dig_p4 = ((int16_t)buf[13] << 8) | (uint16_t)buf[12];
|
||||||
|
bm.dig_p5 = ((int16_t)buf[15] << 8) | (uint16_t)buf[14];
|
||||||
|
bm.dig_p6 = ((int16_t)buf[17] << 8) | (uint16_t)buf[16];
|
||||||
|
bm.dig_p7 = ((int16_t)buf[19] << 8) | (uint16_t)buf[18];
|
||||||
|
bm.dig_p8 = ((int16_t)buf[21] << 8) | (uint16_t)buf[20];
|
||||||
|
bm.dig_p9 = ((int16_t)buf[23] << 8) | (uint16_t)buf[22];
|
||||||
|
/* A0 not used */
|
||||||
|
bm.dig_h1 = (unsigned char)buf[25];
|
||||||
|
|
||||||
|
/* Burst read of all calibration part 2 */
|
||||||
|
i2c_read_mem(BME280_ADDR, BME280_DIG_H2_ADDR, buf, 8);
|
||||||
|
bm.dig_h2 = ((int16_t)buf[1] << 8) | (uint16_t)buf[0];
|
||||||
|
bm.dig_h3 = (unsigned char)buf[2];
|
||||||
|
bm.dig_h4 = ((int16_t)buf[3] << 4) | (((uint16_t)buf[4]) & 0xF);
|
||||||
|
bm.dig_h5 = ((int16_t)buf[6] << 4) | (((uint16_t)buf[5]) & 0xF);
|
||||||
|
bm.dig_h6 = (unsigned char)buf[7];
|
||||||
|
|
||||||
|
bm.mode = mode;
|
||||||
|
}
|
||||||
|
void
|
||||||
|
bme280_read(uint8_t mode)
|
||||||
|
{
|
||||||
|
int32_t ut, uh, up;
|
||||||
|
uint8_t buf[8], sleep;
|
||||||
|
uint16_t i;
|
||||||
|
memset(buf, 0, sizeof(buf));
|
||||||
|
|
||||||
|
/* Are we initilized and in the right mode? */
|
||||||
|
if(mode == BME280_MODE_NONE || mode != bm.mode) {
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
|
ut = uh = up = 0;
|
||||||
|
|
||||||
|
/* Weather mode. See sectiom 3.5 Datasheet */
|
||||||
|
if(mode == BME280_MODE_WEATHER) {
|
||||||
|
/* Humidity oversampling *1 */
|
||||||
|
i2c_write_mem(BME280_ADDR, BME280_CNTL_HUM, 0x01);
|
||||||
|
|
||||||
|
/* 00100111 0x27 oversampling *1 for t and p plus normal mode */
|
||||||
|
/* 0.5 ms -- no filter -- no SPI */
|
||||||
|
i2c_write_mem(BME280_ADDR, BME280_CONTROL, 0x00);
|
||||||
|
|
||||||
|
/* 00100110 0x26 oversampling *1 for t and p plus forced mode */
|
||||||
|
/* Trigger measurement needed for every time in forced mode */
|
||||||
|
i2c_write_mem(BME280_ADDR, BME280_CNTL_MEAS, 0x26);
|
||||||
|
/* Wait to get into sleep mode == measurement done */
|
||||||
|
for(i = 0; i < BME280_MAX_WAIT; i++) {
|
||||||
|
i2c_read_mem(BME280_ADDR, BME280_CNTL_MEAS, &sleep, 1);
|
||||||
|
sleep = sleep& 0x03;
|
||||||
|
if(sleep== 0) {
|
||||||
|
break;
|
||||||
|
} else {
|
||||||
|
clock_delay_msec(1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(i == BME280_MAX_WAIT) {
|
||||||
|
return; /* error wait*/
|
||||||
|
}
|
||||||
|
} else { /* if(mode == BME280_MODE_WEATHER) */
|
||||||
|
return; /* error mode*/
|
||||||
|
}
|
||||||
|
|
||||||
|
/* Burst read of all measurements */
|
||||||
|
i2c_read_mem(BME280_ADDR, BME280_PRESS, buf, 8);
|
||||||
|
ut = (uint32_t)(buf[3]) << 12 | (uint32_t)(buf[4]) << 4 | (uint32_t)buf[5] >> 4;
|
||||||
|
up = (uint32_t)(buf[0]) << 12 | (uint32_t)(buf[1]) << 4 | (uint32_t)buf[2] >> 4;
|
||||||
|
uh = (uint32_t)(buf[6]) << 8 | (uint32_t)buf[7];
|
||||||
|
|
||||||
|
bme280_mea.t_overscale100 = bme280_t_overscale100(ut);
|
||||||
|
bme280_mea.h_overscale1024 = bme280_h_overscale1024(uh);
|
||||||
|
#ifdef BME280_64BIT
|
||||||
|
bme280_mea.p_overscale256 = bme280_p_overscale256(up);
|
||||||
|
#else
|
||||||
|
bme280_mea.p = bme280_p(up);
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if TEST
|
||||||
|
printf("T_BME280=%5.2f", (double)bme280_mea.t_overscale100 / 100.);
|
||||||
|
printf(" RH_BME280=%5.2f ", (double)bme280_mea.h_overscale1024 / 1024.);
|
||||||
|
#ifdef BME280_64BIT
|
||||||
|
printf(" P_BME280=%5.2f\n", (double)bme280_mea.p_overscale256 / 256.);
|
||||||
|
#else
|
||||||
|
printf(" P_BME280=%5.2f\n", (double)bme280_mea.p);
|
||||||
|
#endif
|
||||||
|
#endif
|
||||||
|
}
|
||||||
106
dev/bme280/bme280.h
Normal file
106
dev/bme280/bme280.h
Normal file
@ -0,0 +1,106 @@
|
|||||||
|
/*
|
||||||
|
* Copyright (c) 2015, Copyright Robert Olsson
|
||||||
|
* All rights reserved.
|
||||||
|
*
|
||||||
|
* Redistribution and use in source and binary forms, with or without
|
||||||
|
* modification, are permitted provided that the following conditions
|
||||||
|
* are met:
|
||||||
|
* 1. Redistributions of source code must retain the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer.
|
||||||
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||||||
|
* notice, this list of conditions and the following disclaimer in the
|
||||||
|
* documentation and/or other materials provided with the distribution.
|
||||||
|
* 3. Neither the name of the Institute nor the names of its contributors
|
||||||
|
* may be used to endorse or promote products derived from this software
|
||||||
|
* without specific prior written permission.
|
||||||
|
*
|
||||||
|
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
|
||||||
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||||
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||||
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE 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.
|
||||||
|
*
|
||||||
|
* This file is part of the Contiki operating system.
|
||||||
|
*
|
||||||
|
*
|
||||||
|
* Author : Robert Olsson rolss@kth.se/robert@radio-sensors.com
|
||||||
|
*
|
||||||
|
* Created : 2016-09-14
|
||||||
|
*/
|
||||||
|
|
||||||
|
/**
|
||||||
|
* \file
|
||||||
|
* Definitions for the Bosch BME280 based on datasheel Rev 1.1
|
||||||
|
*/
|
||||||
|
|
||||||
|
#ifndef BME280_H
|
||||||
|
#define BME280_H
|
||||||
|
|
||||||
|
#ifndef BME280_32BIT
|
||||||
|
#define BME280_64BIT
|
||||||
|
#endif
|
||||||
|
|
||||||
|
void bme280_init(uint8_t mode);
|
||||||
|
void bme280_read(uint8_t mode);
|
||||||
|
|
||||||
|
#define BME280_ADDR (0x77 << 1) /* Alternative 0x76 */
|
||||||
|
|
||||||
|
/* Diffrent BOSCH chip id's */
|
||||||
|
#define BMP085_CHIP_ID 0x55 /* And also BMP180 */
|
||||||
|
#define BMP280_CHIP_ID 0x58
|
||||||
|
#define BME280_CHIP_ID 0x60
|
||||||
|
|
||||||
|
/* Address map */
|
||||||
|
#define BME280_DIG_T1_ADDR 0x88
|
||||||
|
#define BME280_DIG_T2_ADDR 0x8A
|
||||||
|
#define BME280_DIG_T3_ADDR 0x8C
|
||||||
|
#define BME280_DIG_P1_ADDR 0x8E
|
||||||
|
#define BME280_DIG_P2_ADDR 0x90
|
||||||
|
#define BME280_DIG_P3_ADDR 0x92
|
||||||
|
#define BME280_DIG_P4_ADDR 0x94
|
||||||
|
#define BME280_DIG_P5_ADDR 0x96
|
||||||
|
#define BME280_DIG_P6_ADDR 0x98
|
||||||
|
#define BME280_DIG_P7_ADDR 0x9A
|
||||||
|
#define BME280_DIG_P8_ADDR 0x9C
|
||||||
|
#define BME280_DIG_P9_ADDR 0x9E
|
||||||
|
#define BME280_DIG_H1_ADDR 0xA1
|
||||||
|
#define BMP_CHIP_ID_ADDR 0xD0
|
||||||
|
#define BME280_CNTL_RESET 0xE0
|
||||||
|
#define BME280_DIG_H2_ADDR 0xE1
|
||||||
|
#define BME280_DIG_H3_ADDR 0xE3
|
||||||
|
#define BME280_DIG_H4_ADDR 0xE4
|
||||||
|
#define BME280_DIG_H5_ADDR 0xE5
|
||||||
|
#define BME280_DIG_H6_ADDR 0xE7
|
||||||
|
#define BME280_CNTL_HUM 0xF2
|
||||||
|
#define BME280_STATUS 0xF3
|
||||||
|
#define BME280_CNTL_MEAS 0xF4
|
||||||
|
#define BME280_CONTROL 0xF5
|
||||||
|
#define BME280_PRESS 0xF7
|
||||||
|
|
||||||
|
/* Function modes outlined in datasheet */
|
||||||
|
#define BME280_MODE_NONE 0
|
||||||
|
#define BME280_MODE_WEATHER 1
|
||||||
|
#define BME280_MODE_HUMIDITY 2
|
||||||
|
#define BME280_MODE_INDOOR_NAVIGATION 3
|
||||||
|
#define BME280_MODE_GAMING 4
|
||||||
|
|
||||||
|
#define BME280_MAX_WAIT 300 /* ms. Forced mode max wait */
|
||||||
|
#define BME280_STARTUP_TIME 2 /* ms */
|
||||||
|
|
||||||
|
struct {
|
||||||
|
int32_t t_overscale100;
|
||||||
|
uint32_t h_overscale1024;
|
||||||
|
#ifdef BME280_64BIT
|
||||||
|
uint32_t p_overscale256;
|
||||||
|
#else
|
||||||
|
uint32_t p;
|
||||||
|
#endif
|
||||||
|
} bme280_mea;
|
||||||
|
|
||||||
|
#endif /* BME280_H */
|
||||||
Loading…
Reference in New Issue
Block a user