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Martin Chlebovec 2019-03-13 19:49:56 +00:00
parent 0da23f20cd
commit 1ee7492161
5 changed files with 690 additions and 2 deletions
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/***************************************************************************
This is a library for the BMP280 pressure sensor
Designed specifically to work with the Adafruit BMP280 Breakout
----> http://www.adafruit.com/products/2651
These sensors use I2C to communicate, 2 pins are required to interface.
Adafruit invests time and resources providing this open source code,
please support Adafruit andopen-source hardware by purchasing products
from Adafruit!
Written by Kevin Townsend for Adafruit Industries.
BSD license, all text above must be included in any redistribution
***************************************************************************/
#include "Arduino.h"
#include <Wire.h>
#include <SPI.h>
#include "Adafruit_BMP280.h"
/***************************************************************************
PRIVATE FUNCTIONS
***************************************************************************/
Adafruit_BMP280::Adafruit_BMP280()
: _cs(-1), _mosi(-1), _miso(-1), _sck(-1)
{ }
Adafruit_BMP280::Adafruit_BMP280(int8_t cspin)
: _cs(cspin), _mosi(-1), _miso(-1), _sck(-1)
{ }
Adafruit_BMP280::Adafruit_BMP280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin)
: _cs(cspin), _mosi(mosipin), _miso(misopin), _sck(sckpin)
{ }
bool Adafruit_BMP280::begin(uint8_t a, uint8_t chipid) {
_i2caddr = a;
if (_cs == -1) {
// i2c
Wire.begin();
} else {
digitalWrite(_cs, HIGH);
pinMode(_cs, OUTPUT);
if (_sck == -1) {
// hardware SPI
SPI.begin();
} else {
// software SPI
pinMode(_sck, OUTPUT);
pinMode(_mosi, OUTPUT);
pinMode(_miso, INPUT);
}
}
if (read8(BMP280_REGISTER_CHIPID) != chipid)
return false;
readCoefficients();
write8(BMP280_REGISTER_CONTROL, 0x3F);
return true;
}
uint8_t Adafruit_BMP280::spixfer(uint8_t x) {
if (_sck == -1)
return SPI.transfer(x);
// software spi
//Serial.println("Software SPI");
uint8_t reply = 0;
for (int i=7; i>=0; i--) {
reply <<= 1;
digitalWrite(_sck, LOW);
digitalWrite(_mosi, x & (1<<i));
digitalWrite(_sck, HIGH);
if (digitalRead(_miso))
reply |= 1;
}
return reply;
}
/**************************************************************************/
/*!
@brief Writes an 8 bit value over I2C/SPI
*/
/**************************************************************************/
void Adafruit_BMP280::write8(byte reg, byte value)
{
if (_cs == -1) {
Wire.beginTransmission((uint8_t)_i2caddr);
Wire.write((uint8_t)reg);
Wire.write((uint8_t)value);
Wire.endTransmission();
} else {
if (_sck == -1)
SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
digitalWrite(_cs, LOW);
spixfer(reg & ~0x80); // write, bit 7 low
spixfer(value);
digitalWrite(_cs, HIGH);
if (_sck == -1)
SPI.endTransaction(); // release the SPI bus
}
}
/**************************************************************************/
/*!
@brief Reads an 8 bit value over I2C/SPI
*/
/**************************************************************************/
uint8_t Adafruit_BMP280::read8(byte reg)
{
uint8_t value;
if (_cs == -1) {
Wire.beginTransmission((uint8_t)_i2caddr);
Wire.write((uint8_t)reg);
Wire.endTransmission();
Wire.requestFrom((uint8_t)_i2caddr, (byte)1);
value = Wire.read();
} else {
if (_sck == -1)
SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
digitalWrite(_cs, LOW);
spixfer(reg | 0x80); // read, bit 7 high
value = spixfer(0);
digitalWrite(_cs, HIGH);
if (_sck == -1)
SPI.endTransaction(); // release the SPI bus
}
return value;
}
/**************************************************************************/
/*!
@brief Reads a 16 bit value over I2C/SPI
*/
/**************************************************************************/
uint16_t Adafruit_BMP280::read16(byte reg)
{
uint16_t value;
if (_cs == -1) {
Wire.beginTransmission((uint8_t)_i2caddr);
Wire.write((uint8_t)reg);
Wire.endTransmission();
Wire.requestFrom((uint8_t)_i2caddr, (byte)2);
value = (Wire.read() << 8) | Wire.read();
} else {
if (_sck == -1)
SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
digitalWrite(_cs, LOW);
spixfer(reg | 0x80); // read, bit 7 high
value = (spixfer(0) << 8) | spixfer(0);
digitalWrite(_cs, HIGH);
if (_sck == -1)
SPI.endTransaction(); // release the SPI bus
}
return value;
}
uint16_t Adafruit_BMP280::read16_LE(byte reg) {
uint16_t temp = read16(reg);
return (temp >> 8) | (temp << 8);
}
/**************************************************************************/
/*!
@brief Reads a signed 16 bit value over I2C/SPI
*/
/**************************************************************************/
int16_t Adafruit_BMP280::readS16(byte reg)
{
return (int16_t)read16(reg);
}
int16_t Adafruit_BMP280::readS16_LE(byte reg)
{
return (int16_t)read16_LE(reg);
}
/**************************************************************************/
/*!
@brief Reads a 24 bit value over I2C/SPI
*/
/**************************************************************************/
uint32_t Adafruit_BMP280::read24(byte reg)
{
uint32_t value;
if (_cs == -1) {
Wire.beginTransmission((uint8_t)_i2caddr);
Wire.write((uint8_t)reg);
Wire.endTransmission();
Wire.requestFrom((uint8_t)_i2caddr, (byte)3);
value = Wire.read();
value <<= 8;
value |= Wire.read();
value <<= 8;
value |= Wire.read();
} else {
if (_sck == -1)
SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
digitalWrite(_cs, LOW);
spixfer(reg | 0x80); // read, bit 7 high
value = spixfer(0);
value <<= 8;
value |= spixfer(0);
value <<= 8;
value |= spixfer(0);
digitalWrite(_cs, HIGH);
if (_sck == -1)
SPI.endTransaction(); // release the SPI bus
}
return value;
}
/**************************************************************************/
/*!
@brief Reads the factory-set coefficients
*/
/**************************************************************************/
void Adafruit_BMP280::readCoefficients(void)
{
_bmp280_calib.dig_T1 = read16_LE(BMP280_REGISTER_DIG_T1);
_bmp280_calib.dig_T2 = readS16_LE(BMP280_REGISTER_DIG_T2);
_bmp280_calib.dig_T3 = readS16_LE(BMP280_REGISTER_DIG_T3);
_bmp280_calib.dig_P1 = read16_LE(BMP280_REGISTER_DIG_P1);
_bmp280_calib.dig_P2 = readS16_LE(BMP280_REGISTER_DIG_P2);
_bmp280_calib.dig_P3 = readS16_LE(BMP280_REGISTER_DIG_P3);
_bmp280_calib.dig_P4 = readS16_LE(BMP280_REGISTER_DIG_P4);
_bmp280_calib.dig_P5 = readS16_LE(BMP280_REGISTER_DIG_P5);
_bmp280_calib.dig_P6 = readS16_LE(BMP280_REGISTER_DIG_P6);
_bmp280_calib.dig_P7 = readS16_LE(BMP280_REGISTER_DIG_P7);
_bmp280_calib.dig_P8 = readS16_LE(BMP280_REGISTER_DIG_P8);
_bmp280_calib.dig_P9 = readS16_LE(BMP280_REGISTER_DIG_P9);
}
/**************************************************************************/
/*!
*/
/**************************************************************************/
float Adafruit_BMP280::readTemperature(void)
{
int32_t var1, var2;
int32_t adc_T = read24(BMP280_REGISTER_TEMPDATA);
adc_T >>= 4;
var1 = ((((adc_T>>3) - ((int32_t)_bmp280_calib.dig_T1 <<1))) *
((int32_t)_bmp280_calib.dig_T2)) >> 11;
var2 = (((((adc_T>>4) - ((int32_t)_bmp280_calib.dig_T1)) *
((adc_T>>4) - ((int32_t)_bmp280_calib.dig_T1))) >> 12) *
((int32_t)_bmp280_calib.dig_T3)) >> 14;
t_fine = var1 + var2;
float T = (t_fine * 5 + 128) >> 8;
return T/100;
}
/**************************************************************************/
/*!
*/
/**************************************************************************/
float Adafruit_BMP280::readPressure(void) {
int64_t var1, var2, p;
// Must be done first to get the t_fine variable set up
readTemperature();
int32_t adc_P = read24(BMP280_REGISTER_PRESSUREDATA);
adc_P >>= 4;
var1 = ((int64_t)t_fine) - 128000;
var2 = var1 * var1 * (int64_t)_bmp280_calib.dig_P6;
var2 = var2 + ((var1*(int64_t)_bmp280_calib.dig_P5)<<17);
var2 = var2 + (((int64_t)_bmp280_calib.dig_P4)<<35);
var1 = ((var1 * var1 * (int64_t)_bmp280_calib.dig_P3)>>8) +
((var1 * (int64_t)_bmp280_calib.dig_P2)<<12);
var1 = (((((int64_t)1)<<47)+var1))*((int64_t)_bmp280_calib.dig_P1)>>33;
if (var1 == 0) {
return 0; // avoid exception caused by division by zero
}
p = 1048576 - adc_P;
p = (((p<<31) - var2)*3125) / var1;
var1 = (((int64_t)_bmp280_calib.dig_P9) * (p>>13) * (p>>13)) >> 25;
var2 = (((int64_t)_bmp280_calib.dig_P8) * p) >> 19;
p = ((p + var1 + var2) >> 8) + (((int64_t)_bmp280_calib.dig_P7)<<4);
return (float)p/256;
}
float Adafruit_BMP280::readAltitude(float seaLevelhPa) {
float altitude;
float pressure = readPressure(); // in Si units for Pascal
pressure /= 100;
altitude = 44330 * (1.0 - pow(pressure / seaLevelhPa, 0.1903));
return altitude;
}

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/***************************************************************************
This is a library for the BMP280 pressure sensor
Designed specifically to work with the Adafruit BMP280 Breakout
----> http://www.adafruit.com/products/2651
These sensors use I2C to communicate, 2 pins are required to interface.
Adafruit invests time and resources providing this open source code,
please support Adafruit andopen-source hardware by purchasing products
from Adafruit!
Written by Kevin Townsend for Adafruit Industries.
BSD license, all text above must be included in any redistribution
***************************************************************************/
#ifndef __BMP280_H__
#define __BMP280_H__
#if (ARDUINO >= 100)
#include "Arduino.h"
#else
#include "WProgram.h"
#endif
#include <Adafruit_Sensor.h>
#ifdef __AVR_ATtiny85__
#include "TinyWireM.h"
#define Wire TinyWireM
#else
#include <Wire.h>
#endif
/*=========================================================================
I2C ADDRESS/BITS/SETTINGS
-----------------------------------------------------------------------*/
#define BMP280_ADDRESS (0x76)
#define BMP280_CHIPID (0x58)
/*=========================================================================*/
/*=========================================================================
REGISTERS
-----------------------------------------------------------------------*/
enum
{
BMP280_REGISTER_DIG_T1 = 0x88,
BMP280_REGISTER_DIG_T2 = 0x8A,
BMP280_REGISTER_DIG_T3 = 0x8C,
BMP280_REGISTER_DIG_P1 = 0x8E,
BMP280_REGISTER_DIG_P2 = 0x90,
BMP280_REGISTER_DIG_P3 = 0x92,
BMP280_REGISTER_DIG_P4 = 0x94,
BMP280_REGISTER_DIG_P5 = 0x96,
BMP280_REGISTER_DIG_P6 = 0x98,
BMP280_REGISTER_DIG_P7 = 0x9A,
BMP280_REGISTER_DIG_P8 = 0x9C,
BMP280_REGISTER_DIG_P9 = 0x9E,
BMP280_REGISTER_CHIPID = 0xD0,
BMP280_REGISTER_VERSION = 0xD1,
BMP280_REGISTER_SOFTRESET = 0xE0,
BMP280_REGISTER_CAL26 = 0xE1, // R calibration stored in 0xE1-0xF0
BMP280_REGISTER_CONTROL = 0xF4,
BMP280_REGISTER_CONFIG = 0xF5,
BMP280_REGISTER_PRESSUREDATA = 0xF7,
BMP280_REGISTER_TEMPDATA = 0xFA,
};
/*=========================================================================*/
/*=========================================================================
CALIBRATION DATA
-----------------------------------------------------------------------*/
typedef struct
{
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;
} bmp280_calib_data;
/*=========================================================================*/
/*
class Adafruit_BMP280_Unified : public Adafruit_Sensor
{
public:
Adafruit_BMP280_Unified(int32_t sensorID = -1);
bool begin(uint8_t addr = BMP280_ADDRESS, uint8_t chipid = BMP280_CHIPID);
void getTemperature(float *temp);
void getPressure(float *pressure);
float pressureToAltitude(float seaLevel, float atmospheric, float temp);
float seaLevelForAltitude(float altitude, float atmospheric, float temp);
void getEvent(sensors_event_t*);
void getSensor(sensor_t*);
private:
uint8_t _i2c_addr;
int32_t _sensorID;
};
*/
class Adafruit_BMP280
{
public:
Adafruit_BMP280();
Adafruit_BMP280(int8_t cspin);
Adafruit_BMP280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin);
bool begin(uint8_t addr = BMP280_ADDRESS, uint8_t chipid = BMP280_CHIPID);
float readTemperature(void);
float readPressure(void);
float readAltitude(float seaLevelhPa = 1013.25);
private:
void readCoefficients(void);
uint8_t spixfer(uint8_t x);
void write8(byte reg, byte value);
uint8_t read8(byte reg);
uint16_t read16(byte reg);
uint32_t read24(byte reg);
int16_t readS16(byte reg);
uint16_t read16_LE(byte reg); // little endian
int16_t readS16_LE(byte reg); // little endian
uint8_t _i2caddr;
int32_t _sensorID;
int32_t t_fine;
int8_t _cs, _mosi, _miso, _sck;
bmp280_calib_data _bmp280_calib;
};
#endif

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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software< /span>
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* Update by K. Townsend (Adafruit Industries) for lighter typedefs, and
* extended sensor support to include color, voltage and current */
#ifndef _ADAFRUIT_SENSOR_H
#define _ADAFRUIT_SENSOR_H
#if ARDUINO >= 100
#include "Arduino.h"
#include "Print.h"
#else
#include "WProgram.h"
#endif
/* Intentionally modeled after sensors.h in the Android API:
* https://github.com/android/platform_hardware_libhardware/blob/master/include/hardware/sensors.h */
/* Constants */
#define SENSORS_GRAVITY_EARTH (9.80665F) /**< Earth's gravity in m/s^2 */
#define SENSORS_GRAVITY_MOON (1.6F) /**< The moon's gravity in m/s^2 */
#define SENSORS_GRAVITY_SUN (275.0F) /**< The sun's gravity in m/s^2 */
#define SENSORS_GRAVITY_STANDARD (SENSORS_GRAVITY_EARTH)
#define SENSORS_MAGFIELD_EARTH_MAX (60.0F) /**< Maximum magnetic field on Earth's surface */
#define SENSORS_MAGFIELD_EARTH_MIN (30.0F) /**< Minimum magnetic field on Earth's surface */
#define SENSORS_PRESSURE_SEALEVELHPA (1013.25F) /**< Average sea level pressure is 1013.25 hPa */
#define SENSORS_DPS_TO_RADS (0.017453293F) /**< Degrees/s to rad/s multiplier */
#define SENSORS_GAUSS_TO_MICROTESLA (100) /**< Gauss to micro-Tesla multiplier */
/** Sensor types */
typedef enum
{
SENSOR_TYPE_ACCELEROMETER = (1), /**< Gravity + linear acceleration */
SENSOR_TYPE_MAGNETIC_FIELD = (2),
SENSOR_TYPE_ORIENTATION = (3),
SENSOR_TYPE_GYROSCOPE = (4),
SENSOR_TYPE_LIGHT = (5),
SENSOR_TYPE_PRESSURE = (6),
SENSOR_TYPE_PROXIMITY = (8),
SENSOR_TYPE_GRAVITY = (9),
SENSOR_TYPE_LINEAR_ACCELERATION = (10), /**< Acceleration not including gravity */
SENSOR_TYPE_ROTATION_VECTOR = (11),
SENSOR_TYPE_RELATIVE_HUMIDITY = (12),
SENSOR_TYPE_AMBIENT_TEMPERATURE = (13),
SENSOR_TYPE_VOLTAGE = (15),
SENSOR_TYPE_CURRENT = (16),
SENSOR_TYPE_COLOR = (17)
} sensors_type_t;
/** struct sensors_vec_s is used to return a vector in a common format. */
typedef struct {
union {
float v[3];
struct {
float x;
float y;
float z;
};
/* Orientation sensors */
struct {
float roll; /**< Rotation around the longitudinal axis (the plane body, 'X axis'). Roll is positive and increasing when moving downward. -90°<=roll<=90° */
float pitch; /**< Rotation around the lateral axis (the wing span, 'Y axis'). Pitch is positive and increasing when moving upwards. -180°<=pitch<=180°) */
float heading; /**< Angle between the longitudinal axis (the plane body) and magnetic north, measured clockwise when viewing from the top of the device. 0-359° */
};
};
int8_t status;
uint8_t reserved[3];
} sensors_vec_t;
/** struct sensors_color_s is used to return color data in a common format. */
typedef struct {
union {
float c[3];
/* RGB color space */
struct {
float r; /**< Red component */
float g; /**< Green component */
float b; /**< Blue component */
};
};
uint32_t rgba; /**< 24-bit RGBA value */
} sensors_color_t;
/* Sensor event (36 bytes) */
/** struct sensor_event_s is used to provide a single sensor event in a common format. */
typedef struct
{
int32_t version; /**< must be sizeof(struct sensors_event_t) */
int32_t sensor_id; /**< unique sensor identifier */
int32_t type; /**< sensor type */
int32_t reserved0; /**< reserved */
int32_t timestamp; /**< time is in milliseconds */
union
{
float data[4];
sensors_vec_t acceleration; /**< acceleration values are in meter per second per second (m/s^2) */
sensors_vec_t magnetic; /**< magnetic vector values are in micro-Tesla (uT) */
sensors_vec_t orientation; /**< orientation values are in degrees */
sensors_vec_t gyro; /**< gyroscope values are in rad/s */
float temperature; /**< temperature is in degrees centigrade (Celsius) */
float distance; /**< distance in centimeters */
float light; /**< light in SI lux units */
float pressure; /**< pressure in hectopascal (hPa) */
float relative_humidity; /**< relative humidity in percent */
float current; /**< current in milliamps (mA) */
float voltage; /**< voltage in volts (V) */
sensors_color_t color; /**< color in RGB component values */
};
} sensors_event_t;
/* Sensor details (40 bytes) */
/** struct sensor_s is used to describe basic information about a specific sensor. */
typedef struct
{
char name[12]; /**< sensor name */
int32_t version; /**< version of the hardware + driver */
int32_t sensor_id; /**< unique sensor identifier */
int32_t type; /**< this sensor's type (ex. SENSOR_TYPE_LIGHT) */
float max_value; /**< maximum value of this sensor's value in SI units */
float min_value; /**< minimum value of this sensor's value in SI units */
float resolution; /**< smallest difference between two values reported by this sensor */
int32_t min_delay; /**< min delay in microseconds between events. zero = not a constant rate */
} sensor_t;
class Adafruit_Sensor {
public:
// Constructor(s)
Adafruit_Sensor() {}
virtual ~Adafruit_Sensor() {}
// These must be defined by the subclass
virtual void enableAutoRange(bool enabled) {};
virtual bool getEvent(sensors_event_t*) = 0;
virtual void getSensor(sensor_t*) = 0;
private:
bool _autoRange;
};
#endif

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README.md
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# BMP280-Tester-ESP32 #Adafruit BMP280 Driver (Barometric Pressure Sensor) #
Testovací program pre ESP32, alebo inú dosku pod ArduinoIDE pre testovanie BMP280 senzora. This driver is for the Adafruit BMP280 Breakout (http://www.adafruit.com/products/2651)
## About the BMP280 ##
This precision sensor from Bosch is the best low-cost sensing solution for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter!
## About this Driver ##
Adafruit invests time and resources providing this open source code. Please support Adafruit and open-source hardware by purchasing products from Adafruit!
Written by Kevin (KTOWN) Townsend for Adafruit Industries.
<!-- START COMPATIBILITY TABLE -->
## Compatibility
MCU | Tested Works | Doesn't Work | Not Tested | Notes
------------------ | :----------: | :----------: | :---------: | -----
Atmega328 @ 16MHz | X | | |
Atmega328 @ 12MHz | X | | |
Atmega32u4 @ 16MHz | X | | | Use SDA/SCL on pins D2 &amp; D3
Atmega32u4 @ 8MHz | X | | | Use SDA/SCL on pins D2 &amp; D3
ESP8266 | X | | | SDA/SCL default to pins 4 &amp; 5 but any two pins can be assigned as SDA/SCL using Wire.begin(SDA,SCL)
Atmega2560 @ 16MHz | X | | | Use SDA/SCL on pins 20 &amp; 21
ATSAM3X8E | X | | | Use SDA/SCL on pins 20 &amp; 21
ATSAM21D | X | | |
ATtiny85 @ 16MHz | | X | |
ATtiny85 @ 8MHz | | X | |
Intel Curie @ 32MHz | | | X |
STM32F2 | | | X |
* ATmega328 @ 16MHz : Arduino UNO, Adafruit Pro Trinket 5V, Adafruit Metro 328, Adafruit Metro Mini
* ATmega328 @ 12MHz : Adafruit Pro Trinket 3V
* ATmega32u4 @ 16MHz : Arduino Leonardo, Arduino Micro, Arduino Yun, Teensy 2.0
* ATmega32u4 @ 8MHz : Adafruit Flora, Bluefruit Micro
* ESP8266 : Adafruit Huzzah
* ATmega2560 @ 16MHz : Arduino Mega
* ATSAM3X8E : Arduino Due
* ATSAM21D : Arduino Zero, M0 Pro
* ATtiny85 @ 16MHz : Adafruit Trinket 5V
* ATtiny85 @ 8MHz : Adafruit Gemma, Arduino Gemma, Adafruit Trinket 3V
<!-- END COMPATIBILITY TABLE -->

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name=Adafruit BMP280 Library
version=1.0.2
author=Adafruit
maintainer=Adafruit <info@adafruit.com>
sentence=Arduino library for BMP280 sensors.
paragraph=Arduino library for BMP280 pressure and altitude sensors.
category=Sensors
url=https://github.com/adafruit/Adafruit_BMP280_Library
architectures=*