Merge branch 'master' of https://github.com/osdomotics/osd-contiki
This commit is contained in:
Harald Pichler
commit
2137a12971
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@ -1,502 +0,0 @@
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/***************************************************************************
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This is a library for the BME280 humidity, temperature & pressure sensor
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||||||
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||||||
Designed specifically to work with the Adafruit BME280 Breakout
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||||||
----> http://www.adafruit.com/products/2650
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||||||
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||||||
These sensors use I2C or SPI to communicate, 2 or 4 pins are required
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||||||
to interface.
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||||||
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||||||
Adafruit invests time and resources providing this open source code,
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||||||
please support Adafruit andopen-source hardware by purchasing products
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||||||
from Adafruit!
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||||||
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|
||||||
Written by Limor Fried & Kevin Townsend for Adafruit Industries.
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||||||
BSD license, all text above must be included in any redistribution
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||||||
***************************************************************************/
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|
||||||
#include "Arduino.h"
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||||||
#include <Wire.h>
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|
||||||
#include <SPI.h>
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|
||||||
#include "Adafruit_BME280.h"
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|
||||||
/***************************************************************************
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||||||
PRIVATE FUNCTIONS
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|
||||||
***************************************************************************/
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|
||||||
Adafruit_BME280::Adafruit_BME280()
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|
||||||
: _cs(-1), _mosi(-1), _miso(-1), _sck(-1)
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|
||||||
{ }
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|
||||||
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|
||||||
Adafruit_BME280::Adafruit_BME280(int8_t cspin)
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|
||||||
: _cs(cspin), _mosi(-1), _miso(-1), _sck(-1)
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|
||||||
{ }
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|
||||||
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|
||||||
Adafruit_BME280::Adafruit_BME280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin)
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|
||||||
: _cs(cspin), _mosi(mosipin), _miso(misopin), _sck(sckpin)
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|
||||||
{ }
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||||||
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|
||||||
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|
||||||
/**************************************************************************/
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|
||||||
/*!
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|
||||||
@brief Initialise sensor with given parameters / settings
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|
||||||
*/
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|
||||||
/**************************************************************************/
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|
||||||
bool Adafruit_BME280::begin(uint8_t addr)
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|
||||||
{
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|
||||||
_i2caddr = addr;
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|
||||||
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|
||||||
// init I2C or SPI sensor interface
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|
||||||
if (_cs == -1) {
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|
||||||
// I2C
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|
||||||
Wire.begin();
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|
||||||
} else {
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|
||||||
digitalWrite(_cs, HIGH);
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|
||||||
pinMode(_cs, OUTPUT);
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|
||||||
if (_sck == -1) {
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|
||||||
// hardware SPI
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|
||||||
SPI.begin();
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|
||||||
} else {
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|
||||||
// software SPI
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|
||||||
pinMode(_sck, OUTPUT);
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|
||||||
pinMode(_mosi, OUTPUT);
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|
||||||
pinMode(_miso, INPUT);
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|
||||||
}
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|
||||||
}
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|
||||||
|
|
||||||
// check if sensor, i.e. the chip ID is correct
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|
||||||
if (read8(BME280_REGISTER_CHIPID) != 0x60)
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|
||||||
return false;
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|
||||||
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|
||||||
// reset the device using soft-reset
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|
||||||
// this makes sure the IIR is off, etc.
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|
||||||
write8(BME280_REGISTER_SOFTRESET, 0xB6);
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|
||||||
|
|
||||||
// wait for chip to wake up.
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|
||||||
delay(300);
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|
||||||
|
|
||||||
// if chip is still reading calibration, delay
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|
||||||
while (isReadingCalibration())
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|
||||||
delay(100);
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|
||||||
|
|
||||||
readCoefficients(); // read trimming parameters, see DS 4.2.2
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|
||||||
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|
||||||
setSampling(); // use defaults
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|
||||||
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|
||||||
return true;
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|
||||||
}
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|
||||||
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|
||||||
/**************************************************************************/
|
|
||||||
/*!
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|
||||||
@brief setup sensor with given parameters / settings
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|
||||||
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|
||||||
This is simply a overload to the normal begin()-function, so SPI users
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|
||||||
don't get confused about the library requiring an address.
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|
||||||
*/
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|
||||||
/**************************************************************************/
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|
||||||
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|
||||||
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|
||||||
void Adafruit_BME280::setSampling(sensor_mode mode,
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sensor_sampling tempSampling,
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||||||
sensor_sampling pressSampling,
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|
||||||
sensor_sampling humSampling,
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|
||||||
sensor_filter filter,
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|
||||||
standby_duration duration) {
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|
||||||
_measReg.mode = mode;
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|
||||||
_measReg.osrs_t = tempSampling;
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|
||||||
_measReg.osrs_p = pressSampling;
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|
||||||
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|
||||||
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|
||||||
_humReg.osrs_h = humSampling;
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|
||||||
_configReg.filter = filter;
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|
||||||
_configReg.t_sb = duration;
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|
||||||
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|
||||||
|
|
||||||
// you must make sure to also set REGISTER_CONTROL after setting the
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|
||||||
// CONTROLHUMID register, otherwise the values won't be applied (see DS 5.4.3)
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|
||||||
write8(BME280_REGISTER_CONTROLHUMID, _humReg.get());
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|
||||||
write8(BME280_REGISTER_CONFIG, _configReg.get());
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|
||||||
write8(BME280_REGISTER_CONTROL, _measReg.get());
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|
||||||
}
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|
||||||
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|
||||||
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|
||||||
/**************************************************************************/
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|
||||||
/*!
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|
||||||
@brief Encapsulate hardware and software SPI transfer into one function
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|
||||||
*/
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|
||||||
/**************************************************************************/
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|
||||||
uint8_t Adafruit_BME280::spixfer(uint8_t x) {
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|
||||||
// hardware SPI
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|
||||||
if (_sck == -1)
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|
||||||
return SPI.transfer(x);
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|
||||||
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|
||||||
// software SPI
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|
||||||
uint8_t reply = 0;
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|
||||||
for (int i=7; i>=0; i--) {
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|
||||||
reply <<= 1;
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|
||||||
digitalWrite(_sck, LOW);
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|
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digitalWrite(_mosi, x & (1<<i));
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|
||||||
digitalWrite(_sck, HIGH);
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|
||||||
if (digitalRead(_miso))
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|
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reply |= 1;
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|
||||||
}
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|
||||||
return reply;
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|
||||||
}
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|
||||||
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|
||||||
/**************************************************************************/
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|
||||||
/*!
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|
||||||
@brief Writes an 8 bit value over I2C or SPI
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|
||||||
*/
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|
||||||
/**************************************************************************/
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|
||||||
void Adafruit_BME280::write8(byte reg, byte value) {
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|
||||||
if (_cs == -1) {
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|
||||||
Wire.beginTransmission((uint8_t)_i2caddr);
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|
||||||
Wire.write((uint8_t)reg);
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|
||||||
Wire.write((uint8_t)value);
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||||||
Wire.endTransmission();
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|
||||||
} else {
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|
||||||
if (_sck == -1)
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|
||||||
SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
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|
||||||
digitalWrite(_cs, LOW);
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|
||||||
spixfer(reg & ~0x80); // write, bit 7 low
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|
||||||
spixfer(value);
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|
||||||
digitalWrite(_cs, HIGH);
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|
||||||
if (_sck == -1)
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|
||||||
SPI.endTransaction(); // release the SPI bus
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|
||||||
}
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|
||||||
}
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|
||||||
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|
||||||
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|
||||||
/**************************************************************************/
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|
||||||
/*!
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|
||||||
@brief Reads an 8 bit value over I2C or SPI
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|
||||||
*/
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|
||||||
/**************************************************************************/
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|
||||||
uint8_t Adafruit_BME280::read8(byte reg) {
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|
||||||
uint8_t value;
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|
||||||
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|
||||||
if (_cs == -1) {
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|
||||||
Wire.beginTransmission((uint8_t)_i2caddr);
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|
||||||
Wire.write((uint8_t)reg);
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|
||||||
Wire.endTransmission();
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|
||||||
Wire.requestFrom((uint8_t)_i2caddr, (byte)1);
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|
||||||
value = Wire.read();
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|
||||||
} else {
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|
||||||
if (_sck == -1)
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|
||||||
SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
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|
||||||
digitalWrite(_cs, LOW);
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|
||||||
spixfer(reg | 0x80); // read, bit 7 high
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|
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value = spixfer(0);
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|
||||||
digitalWrite(_cs, HIGH);
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|
||||||
if (_sck == -1)
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|
||||||
SPI.endTransaction(); // release the SPI bus
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|
||||||
}
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|
||||||
return value;
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|
||||||
}
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|
||||||
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|
||||||
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|
||||||
/**************************************************************************/
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|
||||||
/*!
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|
||||||
@brief Reads a 16 bit value over I2C or SPI
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|
||||||
*/
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|
||||||
/**************************************************************************/
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|
||||||
uint16_t Adafruit_BME280::read16(byte reg)
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|
||||||
{
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|
||||||
uint16_t value;
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||||||
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|
||||||
if (_cs == -1) {
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|
||||||
Wire.beginTransmission((uint8_t)_i2caddr);
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|
||||||
Wire.write((uint8_t)reg);
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|
||||||
Wire.endTransmission();
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|
||||||
Wire.requestFrom((uint8_t)_i2caddr, (byte)2);
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|
||||||
value = (Wire.read() << 8) | Wire.read();
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|
||||||
} else {
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|
||||||
if (_sck == -1)
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|
||||||
SPI.beginTransaction(SPISettings(500000, MSBFIRST, SPI_MODE0));
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|
||||||
digitalWrite(_cs, LOW);
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|
||||||
spixfer(reg | 0x80); // read, bit 7 high
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|
||||||
value = (spixfer(0) << 8) | spixfer(0);
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|
||||||
digitalWrite(_cs, HIGH);
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|
||||||
if (_sck == -1)
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|
||||||
SPI.endTransaction(); // release the SPI bus
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|
||||||
}
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|
||||||
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|
||||||
return value;
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|
||||||
}
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|
||||||
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|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
|
|
||||||
*/
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|
||||||
/**************************************************************************/
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|
||||||
uint16_t Adafruit_BME280::read16_LE(byte reg) {
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|
||||||
uint16_t temp = read16(reg);
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|
||||||
return (temp >> 8) | (temp << 8);
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|
||||||
}
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|
||||||
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|
||||||
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|
||||||
/**************************************************************************/
|
|
||||||
/*!
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|
||||||
@brief Reads a signed 16 bit value over I2C or SPI
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|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
int16_t Adafruit_BME280::readS16(byte reg)
|
|
||||||
{
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|
||||||
return (int16_t)read16(reg);
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|
||||||
}
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|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
|
|
||||||
*/
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|
||||||
/**************************************************************************/
|
|
||||||
int16_t Adafruit_BME280::readS16_LE(byte reg)
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|
||||||
{
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|
||||||
return (int16_t)read16_LE(reg);
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|
||||||
}
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|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
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|
||||||
@brief Reads a 24 bit value over I2C
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|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
uint32_t Adafruit_BME280::read24(byte reg)
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|
||||||
{
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|
||||||
uint32_t value;
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|
||||||
|
|
||||||
if (_cs == -1) {
|
|
||||||
Wire.beginTransmission((uint8_t)_i2caddr);
|
|
||||||
Wire.write((uint8_t)reg);
|
|
||||||
Wire.endTransmission();
|
|
||||||
Wire.requestFrom((uint8_t)_i2caddr, (byte)3);
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|
||||||
|
|
||||||
value = Wire.read();
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|
||||||
value <<= 8;
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|
||||||
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 Take a new measurement (only possible in forced mode)
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
void Adafruit_BME280::takeForcedMeasurement()
|
|
||||||
{
|
|
||||||
// If we are in forced mode, the BME sensor goes back to sleep after each
|
|
||||||
// measurement and we need to set it to forced mode once at this point, so
|
|
||||||
// it will take the next measurement and then return to sleep again.
|
|
||||||
// In normal mode simply does new measurements periodically.
|
|
||||||
if (_measReg.mode == MODE_FORCED) {
|
|
||||||
// set to forced mode, i.e. "take next measurement"
|
|
||||||
write8(BME280_REGISTER_CONTROL, _measReg.get());
|
|
||||||
// wait until measurement has been completed, otherwise we would read
|
|
||||||
// the values from the last measurement
|
|
||||||
while (read8(BME280_REGISTER_STATUS) & 0x08)
|
|
||||||
delay(1);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Reads the factory-set coefficients
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
void Adafruit_BME280::readCoefficients(void)
|
|
||||||
{
|
|
||||||
_bme280_calib.dig_T1 = read16_LE(BME280_REGISTER_DIG_T1);
|
|
||||||
_bme280_calib.dig_T2 = readS16_LE(BME280_REGISTER_DIG_T2);
|
|
||||||
_bme280_calib.dig_T3 = readS16_LE(BME280_REGISTER_DIG_T3);
|
|
||||||
|
|
||||||
_bme280_calib.dig_P1 = read16_LE(BME280_REGISTER_DIG_P1);
|
|
||||||
_bme280_calib.dig_P2 = readS16_LE(BME280_REGISTER_DIG_P2);
|
|
||||||
_bme280_calib.dig_P3 = readS16_LE(BME280_REGISTER_DIG_P3);
|
|
||||||
_bme280_calib.dig_P4 = readS16_LE(BME280_REGISTER_DIG_P4);
|
|
||||||
_bme280_calib.dig_P5 = readS16_LE(BME280_REGISTER_DIG_P5);
|
|
||||||
_bme280_calib.dig_P6 = readS16_LE(BME280_REGISTER_DIG_P6);
|
|
||||||
_bme280_calib.dig_P7 = readS16_LE(BME280_REGISTER_DIG_P7);
|
|
||||||
_bme280_calib.dig_P8 = readS16_LE(BME280_REGISTER_DIG_P8);
|
|
||||||
_bme280_calib.dig_P9 = readS16_LE(BME280_REGISTER_DIG_P9);
|
|
||||||
|
|
||||||
_bme280_calib.dig_H1 = read8(BME280_REGISTER_DIG_H1);
|
|
||||||
_bme280_calib.dig_H2 = readS16_LE(BME280_REGISTER_DIG_H2);
|
|
||||||
_bme280_calib.dig_H3 = read8(BME280_REGISTER_DIG_H3);
|
|
||||||
_bme280_calib.dig_H4 = (read8(BME280_REGISTER_DIG_H4) << 4) | (read8(BME280_REGISTER_DIG_H4+1) & 0xF);
|
|
||||||
_bme280_calib.dig_H5 = (read8(BME280_REGISTER_DIG_H5+1) << 4) | (read8(BME280_REGISTER_DIG_H5) >> 4);
|
|
||||||
_bme280_calib.dig_H6 = (int8_t)read8(BME280_REGISTER_DIG_H6);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief return true if chip is busy reading cal data
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
bool Adafruit_BME280::isReadingCalibration(void)
|
|
||||||
{
|
|
||||||
uint8_t const rStatus = read8(BME280_REGISTER_STATUS);
|
|
||||||
|
|
||||||
return (rStatus & (1 << 0)) != 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Returns the temperature from the sensor
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::readTemperature(void)
|
|
||||||
{
|
|
||||||
int32_t var1, var2;
|
|
||||||
|
|
||||||
int32_t adc_T = read24(BME280_REGISTER_TEMPDATA);
|
|
||||||
if (adc_T == 0x800000) // value in case temp measurement was disabled
|
|
||||||
return NAN;
|
|
||||||
adc_T >>= 4;
|
|
||||||
|
|
||||||
var1 = ((((adc_T>>3) - ((int32_t)_bme280_calib.dig_T1 <<1))) *
|
|
||||||
((int32_t)_bme280_calib.dig_T2)) >> 11;
|
|
||||||
|
|
||||||
var2 = (((((adc_T>>4) - ((int32_t)_bme280_calib.dig_T1)) *
|
|
||||||
((adc_T>>4) - ((int32_t)_bme280_calib.dig_T1))) >> 12) *
|
|
||||||
((int32_t)_bme280_calib.dig_T3)) >> 14;
|
|
||||||
|
|
||||||
t_fine = var1 + var2;
|
|
||||||
|
|
||||||
float T = (t_fine * 5 + 128) >> 8;
|
|
||||||
return T/100;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Returns the temperature from the sensor
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::readPressure(void) {
|
|
||||||
int64_t var1, var2, p;
|
|
||||||
|
|
||||||
readTemperature(); // must be done first to get t_fine
|
|
||||||
|
|
||||||
int32_t adc_P = read24(BME280_REGISTER_PRESSUREDATA);
|
|
||||||
if (adc_P == 0x800000) // value in case pressure measurement was disabled
|
|
||||||
return NAN;
|
|
||||||
adc_P >>= 4;
|
|
||||||
|
|
||||||
var1 = ((int64_t)t_fine) - 128000;
|
|
||||||
var2 = var1 * var1 * (int64_t)_bme280_calib.dig_P6;
|
|
||||||
var2 = var2 + ((var1*(int64_t)_bme280_calib.dig_P5)<<17);
|
|
||||||
var2 = var2 + (((int64_t)_bme280_calib.dig_P4)<<35);
|
|
||||||
var1 = ((var1 * var1 * (int64_t)_bme280_calib.dig_P3)>>8) +
|
|
||||||
((var1 * (int64_t)_bme280_calib.dig_P2)<<12);
|
|
||||||
var1 = (((((int64_t)1)<<47)+var1))*((int64_t)_bme280_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)_bme280_calib.dig_P9) * (p>>13) * (p>>13)) >> 25;
|
|
||||||
var2 = (((int64_t)_bme280_calib.dig_P8) * p) >> 19;
|
|
||||||
|
|
||||||
p = ((p + var1 + var2) >> 8) + (((int64_t)_bme280_calib.dig_P7)<<4);
|
|
||||||
return (float)p/256;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Returns the humidity from the sensor
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::readHumidity(void) {
|
|
||||||
readTemperature(); // must be done first to get t_fine
|
|
||||||
|
|
||||||
int32_t adc_H = read16(BME280_REGISTER_HUMIDDATA);
|
|
||||||
if (adc_H == 0x8000) // value in case humidity measurement was disabled
|
|
||||||
return NAN;
|
|
||||||
|
|
||||||
int32_t v_x1_u32r;
|
|
||||||
|
|
||||||
v_x1_u32r = (t_fine - ((int32_t)76800));
|
|
||||||
|
|
||||||
v_x1_u32r = (((((adc_H << 14) - (((int32_t)_bme280_calib.dig_H4) << 20) -
|
|
||||||
(((int32_t)_bme280_calib.dig_H5) * v_x1_u32r)) + ((int32_t)16384)) >> 15) *
|
|
||||||
(((((((v_x1_u32r * ((int32_t)_bme280_calib.dig_H6)) >> 10) *
|
|
||||||
(((v_x1_u32r * ((int32_t)_bme280_calib.dig_H3)) >> 11) + ((int32_t)32768))) >> 10) +
|
|
||||||
((int32_t)2097152)) * ((int32_t)_bme280_calib.dig_H2) + 8192) >> 14));
|
|
||||||
|
|
||||||
v_x1_u32r = (v_x1_u32r - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7) *
|
|
||||||
((int32_t)_bme280_calib.dig_H1)) >> 4));
|
|
||||||
|
|
||||||
v_x1_u32r = (v_x1_u32r < 0) ? 0 : v_x1_u32r;
|
|
||||||
v_x1_u32r = (v_x1_u32r > 419430400) ? 419430400 : v_x1_u32r;
|
|
||||||
float h = (v_x1_u32r>>12);
|
|
||||||
return h / 1024.0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
Calculates the altitude (in meters) from the specified atmospheric
|
|
||||||
pressure (in hPa), and sea-level pressure (in hPa).
|
|
||||||
|
|
||||||
@param seaLevel Sea-level pressure in hPa
|
|
||||||
@param atmospheric Atmospheric pressure in hPa
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::readAltitude(float seaLevel)
|
|
||||||
{
|
|
||||||
// Equation taken from BMP180 datasheet (page 16):
|
|
||||||
// http://www.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf
|
|
||||||
|
|
||||||
// Note that using the equation from wikipedia can give bad results
|
|
||||||
// at high altitude. See this thread for more information:
|
|
||||||
// http://forums.adafruit.com/viewtopic.php?f=22&t=58064
|
|
||||||
|
|
||||||
float atmospheric = readPressure() / 100.0F;
|
|
||||||
return 44330.0 * (1.0 - pow(atmospheric / seaLevel, 0.1903));
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
Calculates the pressure at sea level (in hPa) from the specified altitude
|
|
||||||
(in meters), and atmospheric pressure (in hPa).
|
|
||||||
@param altitude Altitude in meters
|
|
||||||
@param atmospheric Atmospheric pressure in hPa
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::seaLevelForAltitude(float altitude, float atmospheric)
|
|
||||||
{
|
|
||||||
// Equation taken from BMP180 datasheet (page 17):
|
|
||||||
// http://www.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf
|
|
||||||
|
|
||||||
// Note that using the equation from wikipedia can give bad results
|
|
||||||
// at high altitude. See this thread for more information:
|
|
||||||
// http://forums.adafruit.com/viewtopic.php?f=22&t=58064
|
|
||||||
|
|
||||||
return atmospheric / pow(1.0 - (altitude/44330.0), 5.255);
|
|
||||||
}
|
|
||||||
|
|
@ -1,290 +0,0 @@
|
||||||
/***************************************************************************
|
|
||||||
This is a library for the BME280 humidity, temperature & pressure sensor
|
|
||||||
|
|
||||||
Designed specifically to work with the Adafruit BME280 Breakout
|
|
||||||
----> http://www.adafruit.com/products/2650
|
|
||||||
|
|
||||||
These sensors use I2C or SPI to communicate, 2 or 4 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 Limor Fried & Kevin Townsend for Adafruit Industries.
|
|
||||||
BSD license, all text above must be included in any redistribution
|
|
||||||
***************************************************************************/
|
|
||||||
#ifndef __BME280_H__
|
|
||||||
#define __BME280_H__
|
|
||||||
|
|
||||||
#include "Arduino.h"
|
|
||||||
#include <Adafruit_Sensor.h>
|
|
||||||
#include <Wire.h>
|
|
||||||
|
|
||||||
/*=========================================================================
|
|
||||||
I2C ADDRESS/BITS
|
|
||||||
-----------------------------------------------------------------------*/
|
|
||||||
#define BME280_ADDRESS (0x77)
|
|
||||||
/*=========================================================================*/
|
|
||||||
|
|
||||||
/*=========================================================================
|
|
||||||
REGISTERS
|
|
||||||
-----------------------------------------------------------------------*/
|
|
||||||
enum
|
|
||||||
{
|
|
||||||
BME280_REGISTER_DIG_T1 = 0x88,
|
|
||||||
BME280_REGISTER_DIG_T2 = 0x8A,
|
|
||||||
BME280_REGISTER_DIG_T3 = 0x8C,
|
|
||||||
|
|
||||||
BME280_REGISTER_DIG_P1 = 0x8E,
|
|
||||||
BME280_REGISTER_DIG_P2 = 0x90,
|
|
||||||
BME280_REGISTER_DIG_P3 = 0x92,
|
|
||||||
BME280_REGISTER_DIG_P4 = 0x94,
|
|
||||||
BME280_REGISTER_DIG_P5 = 0x96,
|
|
||||||
BME280_REGISTER_DIG_P6 = 0x98,
|
|
||||||
BME280_REGISTER_DIG_P7 = 0x9A,
|
|
||||||
BME280_REGISTER_DIG_P8 = 0x9C,
|
|
||||||
BME280_REGISTER_DIG_P9 = 0x9E,
|
|
||||||
|
|
||||||
BME280_REGISTER_DIG_H1 = 0xA1,
|
|
||||||
BME280_REGISTER_DIG_H2 = 0xE1,
|
|
||||||
BME280_REGISTER_DIG_H3 = 0xE3,
|
|
||||||
BME280_REGISTER_DIG_H4 = 0xE4,
|
|
||||||
BME280_REGISTER_DIG_H5 = 0xE5,
|
|
||||||
BME280_REGISTER_DIG_H6 = 0xE7,
|
|
||||||
|
|
||||||
BME280_REGISTER_CHIPID = 0xD0,
|
|
||||||
BME280_REGISTER_VERSION = 0xD1,
|
|
||||||
BME280_REGISTER_SOFTRESET = 0xE0,
|
|
||||||
|
|
||||||
BME280_REGISTER_CAL26 = 0xE1, // R calibration stored in 0xE1-0xF0
|
|
||||||
|
|
||||||
BME280_REGISTER_CONTROLHUMID = 0xF2,
|
|
||||||
BME280_REGISTER_STATUS = 0XF3,
|
|
||||||
BME280_REGISTER_CONTROL = 0xF4,
|
|
||||||
BME280_REGISTER_CONFIG = 0xF5,
|
|
||||||
BME280_REGISTER_PRESSUREDATA = 0xF7,
|
|
||||||
BME280_REGISTER_TEMPDATA = 0xFA,
|
|
||||||
BME280_REGISTER_HUMIDDATA = 0xFD
|
|
||||||
};
|
|
||||||
|
|
||||||
/*=========================================================================*/
|
|
||||||
|
|
||||||
/*=========================================================================
|
|
||||||
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;
|
|
||||||
} bme280_calib_data;
|
|
||||||
/*=========================================================================*/
|
|
||||||
|
|
||||||
/*
|
|
||||||
class Adafruit_BME280_Unified : public Adafruit_Sensor
|
|
||||||
{
|
|
||||||
public:
|
|
||||||
Adafruit_BME280_Unified(int32_t sensorID = -1);
|
|
||||||
|
|
||||||
bool begin(uint8_t addr = BME280_ADDRESS);
|
|
||||||
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_BME280 {
|
|
||||||
public:
|
|
||||||
enum sensor_sampling {
|
|
||||||
SAMPLING_NONE = 0b000,
|
|
||||||
SAMPLING_X1 = 0b001,
|
|
||||||
SAMPLING_X2 = 0b010,
|
|
||||||
SAMPLING_X4 = 0b011,
|
|
||||||
SAMPLING_X8 = 0b100,
|
|
||||||
SAMPLING_X16 = 0b101
|
|
||||||
};
|
|
||||||
|
|
||||||
enum sensor_mode {
|
|
||||||
MODE_SLEEP = 0b00,
|
|
||||||
MODE_FORCED = 0b01,
|
|
||||||
MODE_NORMAL = 0b11
|
|
||||||
};
|
|
||||||
|
|
||||||
enum sensor_filter {
|
|
||||||
FILTER_OFF = 0b000,
|
|
||||||
FILTER_X2 = 0b001,
|
|
||||||
FILTER_X4 = 0b010,
|
|
||||||
FILTER_X8 = 0b011,
|
|
||||||
FILTER_X16 = 0b100
|
|
||||||
};
|
|
||||||
|
|
||||||
// standby durations in ms
|
|
||||||
enum standby_duration {
|
|
||||||
STANDBY_MS_0_5 = 0b000,
|
|
||||||
STANDBY_MS_10 = 0b110,
|
|
||||||
STANDBY_MS_20 = 0b111,
|
|
||||||
STANDBY_MS_62_5 = 0b001,
|
|
||||||
STANDBY_MS_125 = 0b010,
|
|
||||||
STANDBY_MS_250 = 0b011,
|
|
||||||
STANDBY_MS_500 = 0b100,
|
|
||||||
STANDBY_MS_1000 = 0b101
|
|
||||||
};
|
|
||||||
|
|
||||||
// constructors
|
|
||||||
Adafruit_BME280(void);
|
|
||||||
Adafruit_BME280(int8_t cspin);
|
|
||||||
Adafruit_BME280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin);
|
|
||||||
|
|
||||||
bool begin(uint8_t addr = BME280_ADDRESS);
|
|
||||||
|
|
||||||
void setSampling(sensor_mode mode = MODE_NORMAL,
|
|
||||||
sensor_sampling tempSampling = SAMPLING_X16,
|
|
||||||
sensor_sampling pressSampling = SAMPLING_X16,
|
|
||||||
sensor_sampling humSampling = SAMPLING_X16,
|
|
||||||
sensor_filter filter = FILTER_OFF,
|
|
||||||
standby_duration duration = STANDBY_MS_0_5
|
|
||||||
);
|
|
||||||
|
|
||||||
void takeForcedMeasurement();
|
|
||||||
float readTemperature(void);
|
|
||||||
float readPressure(void);
|
|
||||||
float readHumidity(void);
|
|
||||||
|
|
||||||
float readAltitude(float seaLevel);
|
|
||||||
float seaLevelForAltitude(float altitude, float pressure);
|
|
||||||
|
|
||||||
|
|
||||||
private:
|
|
||||||
void readCoefficients(void);
|
|
||||||
bool isReadingCalibration(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;
|
|
||||||
|
|
||||||
bme280_calib_data _bme280_calib;
|
|
||||||
|
|
||||||
// The config register
|
|
||||||
struct config {
|
|
||||||
// inactive duration (standby time) in normal mode
|
|
||||||
// 000 = 0.5 ms
|
|
||||||
// 001 = 62.5 ms
|
|
||||||
// 010 = 125 ms
|
|
||||||
// 011 = 250 ms
|
|
||||||
// 100 = 500 ms
|
|
||||||
// 101 = 1000 ms
|
|
||||||
// 110 = 10 ms
|
|
||||||
// 111 = 20 ms
|
|
||||||
unsigned int t_sb : 3;
|
|
||||||
|
|
||||||
// filter settings
|
|
||||||
// 000 = filter off
|
|
||||||
// 001 = 2x filter
|
|
||||||
// 010 = 4x filter
|
|
||||||
// 011 = 8x filter
|
|
||||||
// 100 and above = 16x filter
|
|
||||||
unsigned int filter : 3;
|
|
||||||
|
|
||||||
// unused - don't set
|
|
||||||
unsigned int none : 1;
|
|
||||||
unsigned int spi3w_en : 1;
|
|
||||||
|
|
||||||
unsigned int get() {
|
|
||||||
return (t_sb << 5) | (filter << 3) | spi3w_en;
|
|
||||||
}
|
|
||||||
};
|
|
||||||
config _configReg;
|
|
||||||
|
|
||||||
|
|
||||||
// The ctrl_meas register
|
|
||||||
struct ctrl_meas {
|
|
||||||
// temperature oversampling
|
|
||||||
// 000 = skipped
|
|
||||||
// 001 = x1
|
|
||||||
// 010 = x2
|
|
||||||
// 011 = x4
|
|
||||||
// 100 = x8
|
|
||||||
// 101 and above = x16
|
|
||||||
unsigned int osrs_t : 3;
|
|
||||||
|
|
||||||
// pressure oversampling
|
|
||||||
// 000 = skipped
|
|
||||||
// 001 = x1
|
|
||||||
// 010 = x2
|
|
||||||
// 011 = x4
|
|
||||||
// 100 = x8
|
|
||||||
// 101 and above = x16
|
|
||||||
unsigned int osrs_p : 3;
|
|
||||||
|
|
||||||
// device mode
|
|
||||||
// 00 = sleep
|
|
||||||
// 01 or 10 = forced
|
|
||||||
// 11 = normal
|
|
||||||
unsigned int mode : 2;
|
|
||||||
|
|
||||||
unsigned int get() {
|
|
||||||
return (osrs_t << 5) | (osrs_p << 3) | mode;
|
|
||||||
}
|
|
||||||
};
|
|
||||||
ctrl_meas _measReg;
|
|
||||||
|
|
||||||
|
|
||||||
// The ctrl_hum register
|
|
||||||
struct ctrl_hum {
|
|
||||||
// unused - don't set
|
|
||||||
unsigned int none : 5;
|
|
||||||
|
|
||||||
// pressure oversampling
|
|
||||||
// 000 = skipped
|
|
||||||
// 001 = x1
|
|
||||||
// 010 = x2
|
|
||||||
// 011 = x4
|
|
||||||
// 100 = x8
|
|
||||||
// 101 and above = x16
|
|
||||||
unsigned int osrs_h : 3;
|
|
||||||
|
|
||||||
unsigned int get() {
|
|
||||||
return (osrs_h);
|
|
||||||
}
|
|
||||||
};
|
|
||||||
ctrl_hum _humReg;
|
|
||||||
};
|
|
||||||
|
|
||||||
#endif
|
|
||||||
325
examples/osd/arduino-bmp280/Adafruit_BMP280.cpp
Normal file
325
examples/osd/arduino-bmp280/Adafruit_BMP280.cpp
Normal file
|
|
@ -0,0 +1,325 @@
|
||||||
|
/***************************************************************************
|
||||||
|
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;
|
||||||
|
}
|
||||||
153
examples/osd/arduino-bmp280/Adafruit_BMP280.h
Normal file
153
examples/osd/arduino-bmp280/Adafruit_BMP280.h
Normal file
|
|
@ -0,0 +1,153 @@
|
||||||
|
/***************************************************************************
|
||||||
|
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__
|
||||||
|
|
||||||
|
#include "Arduino.h"
|
||||||
|
#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 (0x77)
|
||||||
|
#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
|
||||||
46
examples/osd/arduino-bmp280/Adafruit_BMP280_Library-master/.github/ISSUE_TEMPLATE.md
vendored
Normal file
46
examples/osd/arduino-bmp280/Adafruit_BMP280_Library-master/.github/ISSUE_TEMPLATE.md
vendored
Normal file
|
|
@ -0,0 +1,46 @@
|
||||||
|
Thank you for opening an issue on an Adafruit Arduino library repository. To
|
||||||
|
improve the speed of resolution please review the following guidelines and
|
||||||
|
common troubleshooting steps below before creating the issue:
|
||||||
|
|
||||||
|
- **Do not use GitHub issues for troubleshooting projects and issues.** Instead use
|
||||||
|
the forums at http://forums.adafruit.com to ask questions and troubleshoot why
|
||||||
|
something isn't working as expected. In many cases the problem is a common issue
|
||||||
|
that you will more quickly receive help from the forum community. GitHub issues
|
||||||
|
are meant for known defects in the code. If you don't know if there is a defect
|
||||||
|
in the code then start with troubleshooting on the forum first.
|
||||||
|
|
||||||
|
- **If following a tutorial or guide be sure you didn't miss a step.** Carefully
|
||||||
|
check all of the steps and commands to run have been followed. Consult the
|
||||||
|
forum if you're unsure or have questions about steps in a guide/tutorial.
|
||||||
|
|
||||||
|
- **For Arduino projects check these very common issues to ensure they don't apply**:
|
||||||
|
|
||||||
|
- For uploading sketches or communicating with the board make sure you're using
|
||||||
|
a **USB data cable** and **not** a **USB charge-only cable**. It is sometimes
|
||||||
|
very hard to tell the difference between a data and charge cable! Try using the
|
||||||
|
cable with other devices or swapping to another cable to confirm it is not
|
||||||
|
the problem.
|
||||||
|
|
||||||
|
- **Be sure you are supplying adequate power to the board.** Check the specs of
|
||||||
|
your board and plug in an external power supply. In many cases just
|
||||||
|
plugging a board into your computer is not enough to power it and other
|
||||||
|
peripherals.
|
||||||
|
|
||||||
|
- **Double check all soldering joints and connections.** Flakey connections
|
||||||
|
cause many mysterious problems. See the [guide to excellent soldering](https://learn.adafruit.com/adafruit-guide-excellent-soldering/tools) for examples of good solder joints.
|
||||||
|
|
||||||
|
- **Ensure you are using an official Arduino or Adafruit board.** We can't
|
||||||
|
guarantee a clone board will have the same functionality and work as expected
|
||||||
|
with this code and don't support them.
|
||||||
|
|
||||||
|
If you're sure this issue is a defect in the code and checked the steps above
|
||||||
|
please fill in the following fields to provide enough troubleshooting information.
|
||||||
|
You may delete the guideline and text above to just leave the following details:
|
||||||
|
|
||||||
|
- Arduino board: **INSERT ARDUINO BOARD NAME/TYPE HERE**
|
||||||
|
|
||||||
|
- Arduino IDE version (found in Arduino -> About Arduino menu): **INSERT ARDUINO
|
||||||
|
VERSION HERE**
|
||||||
|
|
||||||
|
- List the steps to reproduce the problem below (if possible attach a sketch or
|
||||||
|
copy the sketch code in too): **LIST REPRO STEPS BELOW**
|
||||||
26
examples/osd/arduino-bmp280/Adafruit_BMP280_Library-master/.github/PULL_REQUEST_TEMPLATE.md
vendored
Normal file
26
examples/osd/arduino-bmp280/Adafruit_BMP280_Library-master/.github/PULL_REQUEST_TEMPLATE.md
vendored
Normal file
|
|
@ -0,0 +1,26 @@
|
||||||
|
Thank you for creating a pull request to contribute to Adafruit's GitHub code!
|
||||||
|
Before you open the request please review the following guidelines and tips to
|
||||||
|
help it be more easily integrated:
|
||||||
|
|
||||||
|
- **Describe the scope of your change--i.e. what the change does and what parts
|
||||||
|
of the code were modified.** This will help us understand any risks of integrating
|
||||||
|
the code.
|
||||||
|
|
||||||
|
- **Describe any known limitations with your change.** For example if the change
|
||||||
|
doesn't apply to a supported platform of the library please mention it.
|
||||||
|
|
||||||
|
- **Please run any tests or examples that can exercise your modified code.** We
|
||||||
|
strive to not break users of the code and running tests/examples helps with this
|
||||||
|
process.
|
||||||
|
|
||||||
|
Thank you again for contributing! We will try to test and integrate the change
|
||||||
|
as soon as we can, but be aware we have many GitHub repositories to manage and
|
||||||
|
can't immediately respond to every request. There is no need to bump or check in
|
||||||
|
on a pull request (it will clutter the discussion of the request).
|
||||||
|
|
||||||
|
Also don't be worried if the request is closed or not integrated--sometimes the
|
||||||
|
priorities of Adafruit's GitHub code (education, ease of use) might not match the
|
||||||
|
priorities of the pull request. Don't fret, the open source community thrives on
|
||||||
|
forks and GitHub makes it easy to keep your changes in a forked repo.
|
||||||
|
|
||||||
|
After reviewing the guidelines above you can delete this text from the pull request.
|
||||||
|
|
@ -0,0 +1,325 @@
|
||||||
|
/***************************************************************************
|
||||||
|
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;
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,158 @@
|
||||||
|
/***************************************************************************
|
||||||
|
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 (0x77)
|
||||||
|
#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
|
||||||
|
|
@ -1,30 +1,17 @@
|
||||||
This is a library for the Adafruit BME280 Humidity, Barometric Pressure + Temp sensor
|
#Adafruit BMP280 Driver (Barometric Pressure Sensor) #
|
||||||
|
|
||||||
Designed specifically to work with the Adafruit BME280 Breakout
|
This driver is for the Adafruit BMP280 Breakout (http://www.adafruit.com/products/2651)
|
||||||
* http://www.adafruit.com/products/2652
|
|
||||||
|
|
||||||
These sensors use I2C or SPI to communicate, up to 4 pins are required to interface
|
## About the BMP280 ##
|
||||||
|
|
||||||
Use of this library also requires [Adafruit_Sensor](https://github.com/adafruit/Adafruit_Sensor)
|
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!
|
||||||
to be installed on your local system.
|
|
||||||
|
|
||||||
Adafruit invests time and resources providing this open source code,
|
## About this Driver ##
|
||||||
please support Adafruit and open-source hardware by purchasing
|
|
||||||
products from Adafruit!
|
|
||||||
|
|
||||||
Check out the links above for our tutorials and wiring diagrams
|
Adafruit invests time and resources providing this open source code. Please support Adafruit and open-source hardware by purchasing products from Adafruit!
|
||||||
|
|
||||||
Written by Limor Fried/Ladyada for Adafruit Industries.
|
Written by Kevin (KTOWN) Townsend for Adafruit Industries.
|
||||||
BSD license, all text above must be included in any redistribution
|
|
||||||
|
|
||||||
To download. click the DOWNLOAD ZIP button, rename the uncompressed folder Adafruit_BME280.
|
|
||||||
Check that the Adafruit_BME280 folder contains Adafruit_BME280.cpp and Adafruit_BME280.h
|
|
||||||
|
|
||||||
Place the Adafruit_BME280 library folder your arduinosketchfolder/libraries/ folder.
|
|
||||||
You may need to create the libraries subfolder if its your first library. Restart the IDE.
|
|
||||||
|
|
||||||
We also have a great tutorial on Arduino library installation at:
|
|
||||||
http://learn.adafruit.com/adafruit-all-about-arduino-libraries-install-use
|
|
||||||
<!-- START COMPATIBILITY TABLE -->
|
<!-- START COMPATIBILITY TABLE -->
|
||||||
|
|
||||||
## Compatibility
|
## Compatibility
|
||||||
|
|
@ -0,0 +1,57 @@
|
||||||
|
/***************************************************************************
|
||||||
|
This is a library for the BMP280 humidity, temperature & pressure sensor
|
||||||
|
|
||||||
|
Designed specifically to work with the Adafruit BMEP280 Breakout
|
||||||
|
----> http://www.adafruit.com/products/2651
|
||||||
|
|
||||||
|
These sensors use I2C or SPI to communicate, 2 or 4 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 Limor Fried & Kevin Townsend for Adafruit Industries.
|
||||||
|
BSD license, all text above must be included in any redistribution
|
||||||
|
***************************************************************************/
|
||||||
|
|
||||||
|
#include <Wire.h>
|
||||||
|
#include <SPI.h>
|
||||||
|
#include <Adafruit_Sensor.h>
|
||||||
|
#include <Adafruit_BMP280.h>
|
||||||
|
|
||||||
|
#define BMP_SCK 13
|
||||||
|
#define BMP_MISO 12
|
||||||
|
#define BMP_MOSI 11
|
||||||
|
#define BMP_CS 10
|
||||||
|
|
||||||
|
Adafruit_BMP280 bme; // I2C
|
||||||
|
//Adafruit_BMP280 bme(BMP_CS); // hardware SPI
|
||||||
|
//Adafruit_BMP280 bme(BMP_CS, BMP_MOSI, BMP_MISO, BMP_SCK);
|
||||||
|
|
||||||
|
void setup() {
|
||||||
|
Serial.begin(9600);
|
||||||
|
Serial.println(F("BMP280 test"));
|
||||||
|
|
||||||
|
if (!bme.begin()) {
|
||||||
|
Serial.println(F("Could not find a valid BMP280 sensor, check wiring!"));
|
||||||
|
while (1);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void loop() {
|
||||||
|
Serial.print(F("Temperature = "));
|
||||||
|
Serial.print(bme.readTemperature());
|
||||||
|
Serial.println(" *C");
|
||||||
|
|
||||||
|
Serial.print(F("Pressure = "));
|
||||||
|
Serial.print(bme.readPressure());
|
||||||
|
Serial.println(" Pa");
|
||||||
|
|
||||||
|
Serial.print(F("Approx altitude = "));
|
||||||
|
Serial.print(bme.readAltitude(1013.25)); // this should be adjusted to your local forcase
|
||||||
|
Serial.println(" m");
|
||||||
|
|
||||||
|
Serial.println();
|
||||||
|
delay(2000);
|
||||||
|
}
|
||||||
|
|
@ -0,0 +1,9 @@
|
||||||
|
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=*
|
||||||
|
|
@ -1,502 +0,0 @@
|
||||||
/***************************************************************************
|
|
||||||
This is a library for the BME280 humidity, temperature & pressure sensor
|
|
||||||
|
|
||||||
Designed specifically to work with the Adafruit BME280 Breakout
|
|
||||||
----> http://www.adafruit.com/products/2650
|
|
||||||
|
|
||||||
These sensors use I2C or SPI to communicate, 2 or 4 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 Limor Fried & 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_BME280.h"
|
|
||||||
|
|
||||||
/***************************************************************************
|
|
||||||
PRIVATE FUNCTIONS
|
|
||||||
***************************************************************************/
|
|
||||||
Adafruit_BME280::Adafruit_BME280()
|
|
||||||
: _cs(-1), _mosi(-1), _miso(-1), _sck(-1)
|
|
||||||
{ }
|
|
||||||
|
|
||||||
Adafruit_BME280::Adafruit_BME280(int8_t cspin)
|
|
||||||
: _cs(cspin), _mosi(-1), _miso(-1), _sck(-1)
|
|
||||||
{ }
|
|
||||||
|
|
||||||
Adafruit_BME280::Adafruit_BME280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin)
|
|
||||||
: _cs(cspin), _mosi(mosipin), _miso(misopin), _sck(sckpin)
|
|
||||||
{ }
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Initialise sensor with given parameters / settings
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
bool Adafruit_BME280::begin(uint8_t addr)
|
|
||||||
{
|
|
||||||
_i2caddr = addr;
|
|
||||||
|
|
||||||
// init I2C or SPI sensor interface
|
|
||||||
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);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
// check if sensor, i.e. the chip ID is correct
|
|
||||||
if (read8(BME280_REGISTER_CHIPID) != 0x60)
|
|
||||||
return false;
|
|
||||||
|
|
||||||
// reset the device using soft-reset
|
|
||||||
// this makes sure the IIR is off, etc.
|
|
||||||
write8(BME280_REGISTER_SOFTRESET, 0xB6);
|
|
||||||
|
|
||||||
// wait for chip to wake up.
|
|
||||||
delay(300);
|
|
||||||
|
|
||||||
// if chip is still reading calibration, delay
|
|
||||||
while (isReadingCalibration())
|
|
||||||
delay(100);
|
|
||||||
|
|
||||||
readCoefficients(); // read trimming parameters, see DS 4.2.2
|
|
||||||
|
|
||||||
setSampling(); // use defaults
|
|
||||||
|
|
||||||
return true;
|
|
||||||
}
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief setup sensor with given parameters / settings
|
|
||||||
|
|
||||||
This is simply a overload to the normal begin()-function, so SPI users
|
|
||||||
don't get confused about the library requiring an address.
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
|
|
||||||
|
|
||||||
void Adafruit_BME280::setSampling(sensor_mode mode,
|
|
||||||
sensor_sampling tempSampling,
|
|
||||||
sensor_sampling pressSampling,
|
|
||||||
sensor_sampling humSampling,
|
|
||||||
sensor_filter filter,
|
|
||||||
standby_duration duration) {
|
|
||||||
_measReg.mode = mode;
|
|
||||||
_measReg.osrs_t = tempSampling;
|
|
||||||
_measReg.osrs_p = pressSampling;
|
|
||||||
|
|
||||||
|
|
||||||
_humReg.osrs_h = humSampling;
|
|
||||||
_configReg.filter = filter;
|
|
||||||
_configReg.t_sb = duration;
|
|
||||||
|
|
||||||
|
|
||||||
// you must make sure to also set REGISTER_CONTROL after setting the
|
|
||||||
// CONTROLHUMID register, otherwise the values won't be applied (see DS 5.4.3)
|
|
||||||
write8(BME280_REGISTER_CONTROLHUMID, _humReg.get());
|
|
||||||
write8(BME280_REGISTER_CONFIG, _configReg.get());
|
|
||||||
write8(BME280_REGISTER_CONTROL, _measReg.get());
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Encapsulate hardware and software SPI transfer into one function
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
uint8_t Adafruit_BME280::spixfer(uint8_t x) {
|
|
||||||
// hardware SPI
|
|
||||||
if (_sck == -1)
|
|
||||||
return SPI.transfer(x);
|
|
||||||
|
|
||||||
// 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 or SPI
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
void Adafruit_BME280::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 or SPI
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
uint8_t Adafruit_BME280::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 or SPI
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
uint16_t Adafruit_BME280::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_BME280::read16_LE(byte reg) {
|
|
||||||
uint16_t temp = read16(reg);
|
|
||||||
return (temp >> 8) | (temp << 8);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Reads a signed 16 bit value over I2C or SPI
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
int16_t Adafruit_BME280::readS16(byte reg)
|
|
||||||
{
|
|
||||||
return (int16_t)read16(reg);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
int16_t Adafruit_BME280::readS16_LE(byte reg)
|
|
||||||
{
|
|
||||||
return (int16_t)read16_LE(reg);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Reads a 24 bit value over I2C
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
uint32_t Adafruit_BME280::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 Take a new measurement (only possible in forced mode)
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
void Adafruit_BME280::takeForcedMeasurement()
|
|
||||||
{
|
|
||||||
// If we are in forced mode, the BME sensor goes back to sleep after each
|
|
||||||
// measurement and we need to set it to forced mode once at this point, so
|
|
||||||
// it will take the next measurement and then return to sleep again.
|
|
||||||
// In normal mode simply does new measurements periodically.
|
|
||||||
if (_measReg.mode == MODE_FORCED) {
|
|
||||||
// set to forced mode, i.e. "take next measurement"
|
|
||||||
write8(BME280_REGISTER_CONTROL, _measReg.get());
|
|
||||||
// wait until measurement has been completed, otherwise we would read
|
|
||||||
// the values from the last measurement
|
|
||||||
while (read8(BME280_REGISTER_STATUS) & 0x08)
|
|
||||||
delay(1);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Reads the factory-set coefficients
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
void Adafruit_BME280::readCoefficients(void)
|
|
||||||
{
|
|
||||||
_bme280_calib.dig_T1 = read16_LE(BME280_REGISTER_DIG_T1);
|
|
||||||
_bme280_calib.dig_T2 = readS16_LE(BME280_REGISTER_DIG_T2);
|
|
||||||
_bme280_calib.dig_T3 = readS16_LE(BME280_REGISTER_DIG_T3);
|
|
||||||
|
|
||||||
_bme280_calib.dig_P1 = read16_LE(BME280_REGISTER_DIG_P1);
|
|
||||||
_bme280_calib.dig_P2 = readS16_LE(BME280_REGISTER_DIG_P2);
|
|
||||||
_bme280_calib.dig_P3 = readS16_LE(BME280_REGISTER_DIG_P3);
|
|
||||||
_bme280_calib.dig_P4 = readS16_LE(BME280_REGISTER_DIG_P4);
|
|
||||||
_bme280_calib.dig_P5 = readS16_LE(BME280_REGISTER_DIG_P5);
|
|
||||||
_bme280_calib.dig_P6 = readS16_LE(BME280_REGISTER_DIG_P6);
|
|
||||||
_bme280_calib.dig_P7 = readS16_LE(BME280_REGISTER_DIG_P7);
|
|
||||||
_bme280_calib.dig_P8 = readS16_LE(BME280_REGISTER_DIG_P8);
|
|
||||||
_bme280_calib.dig_P9 = readS16_LE(BME280_REGISTER_DIG_P9);
|
|
||||||
|
|
||||||
_bme280_calib.dig_H1 = read8(BME280_REGISTER_DIG_H1);
|
|
||||||
_bme280_calib.dig_H2 = readS16_LE(BME280_REGISTER_DIG_H2);
|
|
||||||
_bme280_calib.dig_H3 = read8(BME280_REGISTER_DIG_H3);
|
|
||||||
_bme280_calib.dig_H4 = (read8(BME280_REGISTER_DIG_H4) << 4) | (read8(BME280_REGISTER_DIG_H4+1) & 0xF);
|
|
||||||
_bme280_calib.dig_H5 = (read8(BME280_REGISTER_DIG_H5+1) << 4) | (read8(BME280_REGISTER_DIG_H5) >> 4);
|
|
||||||
_bme280_calib.dig_H6 = (int8_t)read8(BME280_REGISTER_DIG_H6);
|
|
||||||
}
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief return true if chip is busy reading cal data
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
bool Adafruit_BME280::isReadingCalibration(void)
|
|
||||||
{
|
|
||||||
uint8_t const rStatus = read8(BME280_REGISTER_STATUS);
|
|
||||||
|
|
||||||
return (rStatus & (1 << 0)) != 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Returns the temperature from the sensor
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::readTemperature(void)
|
|
||||||
{
|
|
||||||
int32_t var1, var2;
|
|
||||||
|
|
||||||
int32_t adc_T = read24(BME280_REGISTER_TEMPDATA);
|
|
||||||
if (adc_T == 0x800000) // value in case temp measurement was disabled
|
|
||||||
return NAN;
|
|
||||||
adc_T >>= 4;
|
|
||||||
|
|
||||||
var1 = ((((adc_T>>3) - ((int32_t)_bme280_calib.dig_T1 <<1))) *
|
|
||||||
((int32_t)_bme280_calib.dig_T2)) >> 11;
|
|
||||||
|
|
||||||
var2 = (((((adc_T>>4) - ((int32_t)_bme280_calib.dig_T1)) *
|
|
||||||
((adc_T>>4) - ((int32_t)_bme280_calib.dig_T1))) >> 12) *
|
|
||||||
((int32_t)_bme280_calib.dig_T3)) >> 14;
|
|
||||||
|
|
||||||
t_fine = var1 + var2;
|
|
||||||
|
|
||||||
float T = (t_fine * 5 + 128) >> 8;
|
|
||||||
return T/100;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Returns the temperature from the sensor
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::readPressure(void) {
|
|
||||||
int64_t var1, var2, p;
|
|
||||||
|
|
||||||
readTemperature(); // must be done first to get t_fine
|
|
||||||
|
|
||||||
int32_t adc_P = read24(BME280_REGISTER_PRESSUREDATA);
|
|
||||||
if (adc_P == 0x800000) // value in case pressure measurement was disabled
|
|
||||||
return NAN;
|
|
||||||
adc_P >>= 4;
|
|
||||||
|
|
||||||
var1 = ((int64_t)t_fine) - 128000;
|
|
||||||
var2 = var1 * var1 * (int64_t)_bme280_calib.dig_P6;
|
|
||||||
var2 = var2 + ((var1*(int64_t)_bme280_calib.dig_P5)<<17);
|
|
||||||
var2 = var2 + (((int64_t)_bme280_calib.dig_P4)<<35);
|
|
||||||
var1 = ((var1 * var1 * (int64_t)_bme280_calib.dig_P3)>>8) +
|
|
||||||
((var1 * (int64_t)_bme280_calib.dig_P2)<<12);
|
|
||||||
var1 = (((((int64_t)1)<<47)+var1))*((int64_t)_bme280_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)_bme280_calib.dig_P9) * (p>>13) * (p>>13)) >> 25;
|
|
||||||
var2 = (((int64_t)_bme280_calib.dig_P8) * p) >> 19;
|
|
||||||
|
|
||||||
p = ((p + var1 + var2) >> 8) + (((int64_t)_bme280_calib.dig_P7)<<4);
|
|
||||||
return (float)p/256;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
@brief Returns the humidity from the sensor
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::readHumidity(void) {
|
|
||||||
readTemperature(); // must be done first to get t_fine
|
|
||||||
|
|
||||||
int32_t adc_H = read16(BME280_REGISTER_HUMIDDATA);
|
|
||||||
if (adc_H == 0x8000) // value in case humidity measurement was disabled
|
|
||||||
return NAN;
|
|
||||||
|
|
||||||
int32_t v_x1_u32r;
|
|
||||||
|
|
||||||
v_x1_u32r = (t_fine - ((int32_t)76800));
|
|
||||||
|
|
||||||
v_x1_u32r = (((((adc_H << 14) - (((int32_t)_bme280_calib.dig_H4) << 20) -
|
|
||||||
(((int32_t)_bme280_calib.dig_H5) * v_x1_u32r)) + ((int32_t)16384)) >> 15) *
|
|
||||||
(((((((v_x1_u32r * ((int32_t)_bme280_calib.dig_H6)) >> 10) *
|
|
||||||
(((v_x1_u32r * ((int32_t)_bme280_calib.dig_H3)) >> 11) + ((int32_t)32768))) >> 10) +
|
|
||||||
((int32_t)2097152)) * ((int32_t)_bme280_calib.dig_H2) + 8192) >> 14));
|
|
||||||
|
|
||||||
v_x1_u32r = (v_x1_u32r - (((((v_x1_u32r >> 15) * (v_x1_u32r >> 15)) >> 7) *
|
|
||||||
((int32_t)_bme280_calib.dig_H1)) >> 4));
|
|
||||||
|
|
||||||
v_x1_u32r = (v_x1_u32r < 0) ? 0 : v_x1_u32r;
|
|
||||||
v_x1_u32r = (v_x1_u32r > 419430400) ? 419430400 : v_x1_u32r;
|
|
||||||
float h = (v_x1_u32r>>12);
|
|
||||||
return h / 1024.0;
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
Calculates the altitude (in meters) from the specified atmospheric
|
|
||||||
pressure (in hPa), and sea-level pressure (in hPa).
|
|
||||||
|
|
||||||
@param seaLevel Sea-level pressure in hPa
|
|
||||||
@param atmospheric Atmospheric pressure in hPa
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::readAltitude(float seaLevel)
|
|
||||||
{
|
|
||||||
// Equation taken from BMP180 datasheet (page 16):
|
|
||||||
// http://www.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf
|
|
||||||
|
|
||||||
// Note that using the equation from wikipedia can give bad results
|
|
||||||
// at high altitude. See this thread for more information:
|
|
||||||
// http://forums.adafruit.com/viewtopic.php?f=22&t=58064
|
|
||||||
|
|
||||||
float atmospheric = readPressure() / 100.0F;
|
|
||||||
return 44330.0 * (1.0 - pow(atmospheric / seaLevel, 0.1903));
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
/**************************************************************************/
|
|
||||||
/*!
|
|
||||||
Calculates the pressure at sea level (in hPa) from the specified altitude
|
|
||||||
(in meters), and atmospheric pressure (in hPa).
|
|
||||||
@param altitude Altitude in meters
|
|
||||||
@param atmospheric Atmospheric pressure in hPa
|
|
||||||
*/
|
|
||||||
/**************************************************************************/
|
|
||||||
float Adafruit_BME280::seaLevelForAltitude(float altitude, float atmospheric)
|
|
||||||
{
|
|
||||||
// Equation taken from BMP180 datasheet (page 17):
|
|
||||||
// http://www.adafruit.com/datasheets/BST-BMP180-DS000-09.pdf
|
|
||||||
|
|
||||||
// Note that using the equation from wikipedia can give bad results
|
|
||||||
// at high altitude. See this thread for more information:
|
|
||||||
// http://forums.adafruit.com/viewtopic.php?f=22&t=58064
|
|
||||||
|
|
||||||
return atmospheric / pow(1.0 - (altitude/44330.0), 5.255);
|
|
||||||
}
|
|
||||||
|
|
@ -1,295 +0,0 @@
|
||||||
/***************************************************************************
|
|
||||||
This is a library for the BME280 humidity, temperature & pressure sensor
|
|
||||||
|
|
||||||
Designed specifically to work with the Adafruit BME280 Breakout
|
|
||||||
----> http://www.adafruit.com/products/2650
|
|
||||||
|
|
||||||
These sensors use I2C or SPI to communicate, 2 or 4 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 Limor Fried & Kevin Townsend for Adafruit Industries.
|
|
||||||
BSD license, all text above must be included in any redistribution
|
|
||||||
***************************************************************************/
|
|
||||||
#ifndef __BME280_H__
|
|
||||||
#define __BME280_H__
|
|
||||||
|
|
||||||
#if (ARDUINO >= 100)
|
|
||||||
#include "Arduino.h"
|
|
||||||
#else
|
|
||||||
#include "WProgram.h"
|
|
||||||
#endif
|
|
||||||
|
|
||||||
#include <Adafruit_Sensor.h>
|
|
||||||
#include <Wire.h>
|
|
||||||
|
|
||||||
/*=========================================================================
|
|
||||||
I2C ADDRESS/BITS
|
|
||||||
-----------------------------------------------------------------------*/
|
|
||||||
#define BME280_ADDRESS (0x77)
|
|
||||||
/*=========================================================================*/
|
|
||||||
|
|
||||||
/*=========================================================================
|
|
||||||
REGISTERS
|
|
||||||
-----------------------------------------------------------------------*/
|
|
||||||
enum
|
|
||||||
{
|
|
||||||
BME280_REGISTER_DIG_T1 = 0x88,
|
|
||||||
BME280_REGISTER_DIG_T2 = 0x8A,
|
|
||||||
BME280_REGISTER_DIG_T3 = 0x8C,
|
|
||||||
|
|
||||||
BME280_REGISTER_DIG_P1 = 0x8E,
|
|
||||||
BME280_REGISTER_DIG_P2 = 0x90,
|
|
||||||
BME280_REGISTER_DIG_P3 = 0x92,
|
|
||||||
BME280_REGISTER_DIG_P4 = 0x94,
|
|
||||||
BME280_REGISTER_DIG_P5 = 0x96,
|
|
||||||
BME280_REGISTER_DIG_P6 = 0x98,
|
|
||||||
BME280_REGISTER_DIG_P7 = 0x9A,
|
|
||||||
BME280_REGISTER_DIG_P8 = 0x9C,
|
|
||||||
BME280_REGISTER_DIG_P9 = 0x9E,
|
|
||||||
|
|
||||||
BME280_REGISTER_DIG_H1 = 0xA1,
|
|
||||||
BME280_REGISTER_DIG_H2 = 0xE1,
|
|
||||||
BME280_REGISTER_DIG_H3 = 0xE3,
|
|
||||||
BME280_REGISTER_DIG_H4 = 0xE4,
|
|
||||||
BME280_REGISTER_DIG_H5 = 0xE5,
|
|
||||||
BME280_REGISTER_DIG_H6 = 0xE7,
|
|
||||||
|
|
||||||
BME280_REGISTER_CHIPID = 0xD0,
|
|
||||||
BME280_REGISTER_VERSION = 0xD1,
|
|
||||||
BME280_REGISTER_SOFTRESET = 0xE0,
|
|
||||||
|
|
||||||
BME280_REGISTER_CAL26 = 0xE1, // R calibration stored in 0xE1-0xF0
|
|
||||||
|
|
||||||
BME280_REGISTER_CONTROLHUMID = 0xF2,
|
|
||||||
BME280_REGISTER_STATUS = 0XF3,
|
|
||||||
BME280_REGISTER_CONTROL = 0xF4,
|
|
||||||
BME280_REGISTER_CONFIG = 0xF5,
|
|
||||||
BME280_REGISTER_PRESSUREDATA = 0xF7,
|
|
||||||
BME280_REGISTER_TEMPDATA = 0xFA,
|
|
||||||
BME280_REGISTER_HUMIDDATA = 0xFD
|
|
||||||
};
|
|
||||||
|
|
||||||
/*=========================================================================*/
|
|
||||||
|
|
||||||
/*=========================================================================
|
|
||||||
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;
|
|
||||||
} bme280_calib_data;
|
|
||||||
/*=========================================================================*/
|
|
||||||
|
|
||||||
/*
|
|
||||||
class Adafruit_BME280_Unified : public Adafruit_Sensor
|
|
||||||
{
|
|
||||||
public:
|
|
||||||
Adafruit_BME280_Unified(int32_t sensorID = -1);
|
|
||||||
|
|
||||||
bool begin(uint8_t addr = BME280_ADDRESS);
|
|
||||||
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_BME280 {
|
|
||||||
public:
|
|
||||||
enum sensor_sampling {
|
|
||||||
SAMPLING_NONE = 0b000,
|
|
||||||
SAMPLING_X1 = 0b001,
|
|
||||||
SAMPLING_X2 = 0b010,
|
|
||||||
SAMPLING_X4 = 0b011,
|
|
||||||
SAMPLING_X8 = 0b100,
|
|
||||||
SAMPLING_X16 = 0b101
|
|
||||||
};
|
|
||||||
|
|
||||||
enum sensor_mode {
|
|
||||||
MODE_SLEEP = 0b00,
|
|
||||||
MODE_FORCED = 0b01,
|
|
||||||
MODE_NORMAL = 0b11
|
|
||||||
};
|
|
||||||
|
|
||||||
enum sensor_filter {
|
|
||||||
FILTER_OFF = 0b000,
|
|
||||||
FILTER_X2 = 0b001,
|
|
||||||
FILTER_X4 = 0b010,
|
|
||||||
FILTER_X8 = 0b011,
|
|
||||||
FILTER_X16 = 0b100
|
|
||||||
};
|
|
||||||
|
|
||||||
// standby durations in ms
|
|
||||||
enum standby_duration {
|
|
||||||
STANDBY_MS_0_5 = 0b000,
|
|
||||||
STANDBY_MS_10 = 0b110,
|
|
||||||
STANDBY_MS_20 = 0b111,
|
|
||||||
STANDBY_MS_62_5 = 0b001,
|
|
||||||
STANDBY_MS_125 = 0b010,
|
|
||||||
STANDBY_MS_250 = 0b011,
|
|
||||||
STANDBY_MS_500 = 0b100,
|
|
||||||
STANDBY_MS_1000 = 0b101
|
|
||||||
};
|
|
||||||
|
|
||||||
// constructors
|
|
||||||
Adafruit_BME280(void);
|
|
||||||
Adafruit_BME280(int8_t cspin);
|
|
||||||
Adafruit_BME280(int8_t cspin, int8_t mosipin, int8_t misopin, int8_t sckpin);
|
|
||||||
|
|
||||||
bool begin(uint8_t addr = BME280_ADDRESS);
|
|
||||||
|
|
||||||
void setSampling(sensor_mode mode = MODE_NORMAL,
|
|
||||||
sensor_sampling tempSampling = SAMPLING_X16,
|
|
||||||
sensor_sampling pressSampling = SAMPLING_X16,
|
|
||||||
sensor_sampling humSampling = SAMPLING_X16,
|
|
||||||
sensor_filter filter = FILTER_OFF,
|
|
||||||
standby_duration duration = STANDBY_MS_0_5
|
|
||||||
);
|
|
||||||
|
|
||||||
void takeForcedMeasurement();
|
|
||||||
float readTemperature(void);
|
|
||||||
float readPressure(void);
|
|
||||||
float readHumidity(void);
|
|
||||||
|
|
||||||
float readAltitude(float seaLevel);
|
|
||||||
float seaLevelForAltitude(float altitude, float pressure);
|
|
||||||
|
|
||||||
|
|
||||||
private:
|
|
||||||
void readCoefficients(void);
|
|
||||||
bool isReadingCalibration(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;
|
|
||||||
|
|
||||||
bme280_calib_data _bme280_calib;
|
|
||||||
|
|
||||||
// The config register
|
|
||||||
struct config {
|
|
||||||
// inactive duration (standby time) in normal mode
|
|
||||||
// 000 = 0.5 ms
|
|
||||||
// 001 = 62.5 ms
|
|
||||||
// 010 = 125 ms
|
|
||||||
// 011 = 250 ms
|
|
||||||
// 100 = 500 ms
|
|
||||||
// 101 = 1000 ms
|
|
||||||
// 110 = 10 ms
|
|
||||||
// 111 = 20 ms
|
|
||||||
unsigned int t_sb : 3;
|
|
||||||
|
|
||||||
// filter settings
|
|
||||||
// 000 = filter off
|
|
||||||
// 001 = 2x filter
|
|
||||||
// 010 = 4x filter
|
|
||||||
// 011 = 8x filter
|
|
||||||
// 100 and above = 16x filter
|
|
||||||
unsigned int filter : 3;
|
|
||||||
|
|
||||||
// unused - don't set
|
|
||||||
unsigned int none : 1;
|
|
||||||
unsigned int spi3w_en : 1;
|
|
||||||
|
|
||||||
unsigned int get() {
|
|
||||||
return (t_sb << 5) | (filter << 3) | spi3w_en;
|
|
||||||
}
|
|
||||||
};
|
|
||||||
config _configReg;
|
|
||||||
|
|
||||||
|
|
||||||
// The ctrl_meas register
|
|
||||||
struct ctrl_meas {
|
|
||||||
// temperature oversampling
|
|
||||||
// 000 = skipped
|
|
||||||
// 001 = x1
|
|
||||||
// 010 = x2
|
|
||||||
// 011 = x4
|
|
||||||
// 100 = x8
|
|
||||||
// 101 and above = x16
|
|
||||||
unsigned int osrs_t : 3;
|
|
||||||
|
|
||||||
// pressure oversampling
|
|
||||||
// 000 = skipped
|
|
||||||
// 001 = x1
|
|
||||||
// 010 = x2
|
|
||||||
// 011 = x4
|
|
||||||
// 100 = x8
|
|
||||||
// 101 and above = x16
|
|
||||||
unsigned int osrs_p : 3;
|
|
||||||
|
|
||||||
// device mode
|
|
||||||
// 00 = sleep
|
|
||||||
// 01 or 10 = forced
|
|
||||||
// 11 = normal
|
|
||||||
unsigned int mode : 2;
|
|
||||||
|
|
||||||
unsigned int get() {
|
|
||||||
return (osrs_t << 5) | (osrs_p << 3) | mode;
|
|
||||||
}
|
|
||||||
};
|
|
||||||
ctrl_meas _measReg;
|
|
||||||
|
|
||||||
|
|
||||||
// The ctrl_hum register
|
|
||||||
struct ctrl_hum {
|
|
||||||
// unused - don't set
|
|
||||||
unsigned int none : 5;
|
|
||||||
|
|
||||||
// pressure oversampling
|
|
||||||
// 000 = skipped
|
|
||||||
// 001 = x1
|
|
||||||
// 010 = x2
|
|
||||||
// 011 = x4
|
|
||||||
// 100 = x8
|
|
||||||
// 101 and above = x16
|
|
||||||
unsigned int osrs_h : 3;
|
|
||||||
|
|
||||||
unsigned int get() {
|
|
||||||
return (osrs_h);
|
|
||||||
}
|
|
||||||
};
|
|
||||||
ctrl_hum _humReg;
|
|
||||||
};
|
|
||||||
|
|
||||||
#endif
|
|
||||||
|
|
@ -1,157 +0,0 @@
|
||||||
/***************************************************************************
|
|
||||||
This is a library for the BME280 humidity, temperature & pressure sensor
|
|
||||||
|
|
||||||
Designed specifically to work with the Adafruit BME280 Breakout
|
|
||||||
----> http://www.adafruit.com/products/2650
|
|
||||||
|
|
||||||
These sensors use I2C or SPI to communicate, 2 or 4 pins are required
|
|
||||||
to interface. The device's I2C address is either 0x76 or 0x77.
|
|
||||||
|
|
||||||
Adafruit invests time and resources providing this open source code,
|
|
||||||
please support Adafruit andopen-source hardware by purchasing products
|
|
||||||
from Adafruit!
|
|
||||||
|
|
||||||
Written by Limor Fried & Kevin Townsend for Adafruit Industries.
|
|
||||||
BSD license, all text above must be included in any redistribution
|
|
||||||
***************************************************************************/
|
|
||||||
|
|
||||||
#include <Wire.h>
|
|
||||||
#include <SPI.h>
|
|
||||||
#include <Adafruit_Sensor.h>
|
|
||||||
#include <Adafruit_BME280.h>
|
|
||||||
|
|
||||||
#define BME_SCK 13
|
|
||||||
#define BME_MISO 12
|
|
||||||
#define BME_MOSI 11
|
|
||||||
#define BME_CS 10
|
|
||||||
|
|
||||||
#define SEALEVELPRESSURE_HPA (1013.25)
|
|
||||||
|
|
||||||
Adafruit_BME280 bme; // I2C
|
|
||||||
//Adafruit_BME280 bme(BME_CS); // hardware SPI
|
|
||||||
//Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
|
|
||||||
|
|
||||||
unsigned long delayTime;
|
|
||||||
|
|
||||||
void setup() {
|
|
||||||
Serial.begin(9600);
|
|
||||||
Serial.println(F("BME280 test"));
|
|
||||||
|
|
||||||
if (! bme.begin()) {
|
|
||||||
Serial.println("Could not find a valid BME280 sensor, check wiring!");
|
|
||||||
while (1);
|
|
||||||
}
|
|
||||||
|
|
||||||
Serial.println("-- Default Test --");
|
|
||||||
Serial.println("normal mode, 16x oversampling for all, filter off,");
|
|
||||||
Serial.println("0.5ms standby period");
|
|
||||||
delayTime = 5000;
|
|
||||||
|
|
||||||
|
|
||||||
// For more details on the following scenarious, see chapter
|
|
||||||
// 3.5 "Recommended modes of operation" in the datasheet
|
|
||||||
|
|
||||||
/*
|
|
||||||
// weather monitoring
|
|
||||||
Serial.println("-- Weather Station Scenario --");
|
|
||||||
Serial.println("forced mode, 1x temperature / 1x humidity / 1x pressure oversampling,");
|
|
||||||
Serial.println("filter off");
|
|
||||||
bme.setSampling(Adafruit_BME280::MODE_FORCED,
|
|
||||||
Adafruit_BME280::SAMPLING_X1, // temperature
|
|
||||||
Adafruit_BME280::SAMPLING_X1, // pressure
|
|
||||||
Adafruit_BME280::SAMPLING_X1, // humidity
|
|
||||||
Adafruit_BME280::FILTER_OFF );
|
|
||||||
|
|
||||||
// suggested rate is 1/60Hz (1m)
|
|
||||||
delayTime = 60000; // in milliseconds
|
|
||||||
*/
|
|
||||||
|
|
||||||
/*
|
|
||||||
// humidity sensing
|
|
||||||
Serial.println("-- Humidity Sensing Scenario --");
|
|
||||||
Serial.println("forced mode, 1x temperature / 1x humidity / 0x pressure oversampling");
|
|
||||||
Serial.println("= pressure off, filter off");
|
|
||||||
bme.setSampling(Adafruit_BME280::MODE_FORCED,
|
|
||||||
Adafruit_BME280::SAMPLING_X1, // temperature
|
|
||||||
Adafruit_BME280::SAMPLING_NONE, // pressure
|
|
||||||
Adafruit_BME280::SAMPLING_X1, // humidity
|
|
||||||
Adafruit_BME280::FILTER_OFF );
|
|
||||||
|
|
||||||
// suggested rate is 1Hz (1s)
|
|
||||||
delayTime = 1000; // in milliseconds
|
|
||||||
*/
|
|
||||||
|
|
||||||
/*
|
|
||||||
// indoor navigation
|
|
||||||
Serial.println("-- Indoor Navigation Scenario --");
|
|
||||||
Serial.println("normal mode, 16x pressure / 2x temperature / 1x humidity oversampling,");
|
|
||||||
Serial.println("0.5ms standby period, filter 16x");
|
|
||||||
bme.setSampling(Adafruit_BME280::MODE_NORMAL,
|
|
||||||
Adafruit_BME280::SAMPLING_X2, // temperature
|
|
||||||
Adafruit_BME280::SAMPLING_X16, // pressure
|
|
||||||
Adafruit_BME280::SAMPLING_X1, // humidity
|
|
||||||
Adafruit_BME280::FILTER_X16,
|
|
||||||
Adafruit_BME280::STANDBY_MS_0_5 );
|
|
||||||
|
|
||||||
// suggested rate is 25Hz
|
|
||||||
// 1 + (2 * T_ovs) + (2 * P_ovs + 0.5) + (2 * H_ovs + 0.5)
|
|
||||||
// T_ovs = 2
|
|
||||||
// P_ovs = 16
|
|
||||||
// H_ovs = 1
|
|
||||||
// = 40ms (25Hz)
|
|
||||||
// with standby time that should really be 24.16913... Hz
|
|
||||||
delayTime = 41;
|
|
||||||
|
|
||||||
/*
|
|
||||||
// gaming
|
|
||||||
Serial.println("-- Gaming Scenario --");
|
|
||||||
Serial.println("normal mode, 4x pressure / 1x temperature / 0x humidity oversampling,");
|
|
||||||
Serial.println("= humidity off, 0.5ms standby period, filter 16x");
|
|
||||||
bme.setSampling(Adafruit_BME280::MODE_NORMAL,
|
|
||||||
Adafruit_BME280::SAMPLING_X1, // temperature
|
|
||||||
Adafruit_BME280::SAMPLING_X4, // pressure
|
|
||||||
Adafruit_BME280::SAMPLING_NONE, // humidity
|
|
||||||
Adafruit_BME280::FILTER_X16,
|
|
||||||
Adafruit_BME280::STANDBY_MS_0_5 );
|
|
||||||
|
|
||||||
// Suggested rate is 83Hz
|
|
||||||
// 1 + (2 * T_ovs) + (2 * P_ovs + 0.5)
|
|
||||||
// T_ovs = 1
|
|
||||||
// P_ovs = 4
|
|
||||||
// = 11.5ms + 0.5ms standby
|
|
||||||
delayTime = 12;
|
|
||||||
*/
|
|
||||||
|
|
||||||
Serial.println();
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
void loop() {
|
|
||||||
// Only needed in forced mode! In normal mode, you can remove the next line.
|
|
||||||
bme.takeForcedMeasurement(); // has no effect in normal mode
|
|
||||||
|
|
||||||
printValues();
|
|
||||||
delay(delayTime);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
void printValues() {
|
|
||||||
Serial.print("Temperature = ");
|
|
||||||
Serial.print(bme.readTemperature());
|
|
||||||
Serial.println(" *C");
|
|
||||||
|
|
||||||
Serial.print("Pressure = ");
|
|
||||||
|
|
||||||
Serial.print(bme.readPressure() / 100.0F);
|
|
||||||
Serial.println(" hPa");
|
|
||||||
|
|
||||||
Serial.print("Approx. Altitude = ");
|
|
||||||
Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
|
|
||||||
Serial.println(" m");
|
|
||||||
|
|
||||||
Serial.print("Humidity = ");
|
|
||||||
Serial.print(bme.readHumidity());
|
|
||||||
Serial.println(" %");
|
|
||||||
|
|
||||||
Serial.println();
|
|
||||||
}
|
|
||||||
|
|
@ -1,81 +0,0 @@
|
||||||
/***************************************************************************
|
|
||||||
This is a library for the BME280 humidity, temperature & pressure sensor
|
|
||||||
|
|
||||||
Designed specifically to work with the Adafruit BME280 Breakout
|
|
||||||
----> http://www.adafruit.com/products/2650
|
|
||||||
|
|
||||||
These sensors use I2C or SPI to communicate, 2 or 4 pins are required
|
|
||||||
to interface. The device's I2C address is either 0x76 or 0x77.
|
|
||||||
|
|
||||||
Adafruit invests time and resources providing this open source code,
|
|
||||||
please support Adafruit andopen-source hardware by purchasing products
|
|
||||||
from Adafruit!
|
|
||||||
|
|
||||||
Written by Limor Fried & Kevin Townsend for Adafruit Industries.
|
|
||||||
BSD license, all text above must be included in any redistribution
|
|
||||||
***************************************************************************/
|
|
||||||
|
|
||||||
#include <Wire.h>
|
|
||||||
#include <SPI.h>
|
|
||||||
#include <Adafruit_Sensor.h>
|
|
||||||
#include <Adafruit_BME280.h>
|
|
||||||
|
|
||||||
#define BME_SCK 13
|
|
||||||
#define BME_MISO 12
|
|
||||||
#define BME_MOSI 11
|
|
||||||
#define BME_CS 10
|
|
||||||
|
|
||||||
#define SEALEVELPRESSURE_HPA (1013.25)
|
|
||||||
|
|
||||||
Adafruit_BME280 bme; // I2C
|
|
||||||
//Adafruit_BME280 bme(BME_CS); // hardware SPI
|
|
||||||
//Adafruit_BME280 bme(BME_CS, BME_MOSI, BME_MISO, BME_SCK); // software SPI
|
|
||||||
|
|
||||||
unsigned long delayTime;
|
|
||||||
|
|
||||||
void setup() {
|
|
||||||
Serial.begin(9600);
|
|
||||||
Serial.println(F("BME280 test"));
|
|
||||||
|
|
||||||
bool status;
|
|
||||||
|
|
||||||
// default settings
|
|
||||||
status = bme.begin();
|
|
||||||
if (!status) {
|
|
||||||
Serial.println("Could not find a valid BME280 sensor, check wiring!");
|
|
||||||
while (1);
|
|
||||||
}
|
|
||||||
|
|
||||||
Serial.println("-- Default Test --");
|
|
||||||
delayTime = 1000;
|
|
||||||
|
|
||||||
Serial.println();
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
void loop() {
|
|
||||||
printValues();
|
|
||||||
delay(delayTime);
|
|
||||||
}
|
|
||||||
|
|
||||||
|
|
||||||
void printValues() {
|
|
||||||
Serial.print("Temperature = ");
|
|
||||||
Serial.print(bme.readTemperature());
|
|
||||||
Serial.println(" *C");
|
|
||||||
|
|
||||||
Serial.print("Pressure = ");
|
|
||||||
|
|
||||||
Serial.print(bme.readPressure() / 100.0F);
|
|
||||||
Serial.println(" hPa");
|
|
||||||
|
|
||||||
Serial.print("Approx. Altitude = ");
|
|
||||||
Serial.print(bme.readAltitude(SEALEVELPRESSURE_HPA));
|
|
||||||
Serial.println(" m");
|
|
||||||
|
|
||||||
Serial.print("Humidity = ");
|
|
||||||
Serial.print(bme.readHumidity());
|
|
||||||
Serial.println(" %");
|
|
||||||
|
|
||||||
Serial.println();
|
|
||||||
}
|
|
||||||
|
|
@ -12,7 +12,7 @@ CONTIKI_WITH_IPV6 = 1
|
||||||
CFLAGS += -DPROJECT_CONF_H=\"project-conf.h\"
|
CFLAGS += -DPROJECT_CONF_H=\"project-conf.h\"
|
||||||
LFLAGS += -lm
|
LFLAGS += -lm
|
||||||
|
|
||||||
PROJECT_SOURCEFILES += ${SKETCH}.cpp Adafruit_BME280.cpp
|
PROJECT_SOURCEFILES += ${SKETCH}.cpp Adafruit_BMP280.cpp
|
||||||
|
|
||||||
# automatically build RESTful resources
|
# automatically build RESTful resources
|
||||||
REST_RESOURCES_DIR = ./resources
|
REST_RESOURCES_DIR = ./resources
|
||||||
|
|
|
||||||
|
|
@ -12,7 +12,7 @@
|
||||||
|
|
||||||
#include <Wire.h>
|
#include <Wire.h>
|
||||||
#include <Adafruit_Sensor.h>
|
#include <Adafruit_Sensor.h>
|
||||||
#include <Adafruit_BME280.h>
|
#include <Adafruit_BMP280.h>
|
||||||
|
|
||||||
extern "C" {
|
extern "C" {
|
||||||
#include "arduino-process.h"
|
#include "arduino-process.h"
|
||||||
|
|
@ -24,31 +24,28 @@ float bmptemp;
|
||||||
float bmppress;
|
float bmppress;
|
||||||
float bmpatm;
|
float bmpatm;
|
||||||
float bmpalt;
|
float bmpalt;
|
||||||
float bmphum;
|
|
||||||
char bmptemp_s[8];
|
char bmptemp_s[8];
|
||||||
char bmppress_s[8];
|
char bmppress_s[10];
|
||||||
char bmpatm_s[8];
|
char bmpatm_s[8];
|
||||||
char bmpalt_s[8];
|
char bmpalt_s[8];;
|
||||||
char bmphum_s[8];
|
|
||||||
|
|
||||||
#define SEALEVELPRESSURE_HPA (1013.25)
|
#define SEALEVELPRESSURE_HPA (1013.25)
|
||||||
Adafruit_BME280 bme; // I2C
|
Adafruit_BMP280 bme; // I2C
|
||||||
|
|
||||||
#define LED_PIN 4
|
#define LED_PIN 4
|
||||||
}
|
}
|
||||||
|
|
||||||
void setup (void)
|
void setup (void)
|
||||||
{
|
{
|
||||||
|
bool status;
|
||||||
|
|
||||||
// switch off the led
|
// switch off the led
|
||||||
pinMode(LED_PIN, OUTPUT);
|
pinMode(LED_PIN, OUTPUT);
|
||||||
digitalWrite(LED_PIN, HIGH);
|
digitalWrite(LED_PIN, HIGH);
|
||||||
|
|
||||||
bool status;
|
|
||||||
|
|
||||||
// default settings
|
// default settings
|
||||||
status = bme.begin(0x77);
|
status = bme.begin(0x76);
|
||||||
if (!status) {
|
if (!status) {
|
||||||
printf("Could not find a valid BME280 sensor, check wiring!");
|
printf("Could not find a valid BMP280 sensor, check wiring!");
|
||||||
}
|
}
|
||||||
// init coap resourcen
|
// init coap resourcen
|
||||||
rest_init_engine ();
|
rest_init_engine ();
|
||||||
|
|
@ -69,13 +66,12 @@ void loop (void)
|
||||||
bmppress = bme.readPressure();
|
bmppress = bme.readPressure();
|
||||||
bmpalt = bme.readAltitude(SEALEVELPRESSURE_HPA);
|
bmpalt = bme.readAltitude(SEALEVELPRESSURE_HPA);
|
||||||
bmpatm = bme.readPressure() / 100.0F;
|
bmpatm = bme.readPressure() / 100.0F;
|
||||||
bmphum = bme.readHumidity();
|
|
||||||
|
|
||||||
dtostrf(bmptemp , 6, 2, bmptemp_s );
|
dtostrf(bmptemp , 6, 2, bmptemp_s );
|
||||||
dtostrf(bmppress , 6, 2, bmppress_s );
|
dtostrf(bmppress , 6, 2, bmppress_s );
|
||||||
dtostrf(bmpalt , 6, 2, bmpalt_s );
|
dtostrf(bmpalt , 6, 2, bmpalt_s );
|
||||||
dtostrf(bmpatm , 6, 2, bmpatm_s );
|
dtostrf(bmpatm , 6, 2, bmpatm_s );
|
||||||
dtostrf(bmphum , 6, 2, bmphum_s );
|
|
||||||
|
|
||||||
// remove space
|
// remove space
|
||||||
if(bmptemp_s[0]==' '){
|
if(bmptemp_s[0]==' '){
|
||||||
|
|
@ -90,14 +86,10 @@ void loop (void)
|
||||||
if(bmpatm_s[0]==' '){
|
if(bmpatm_s[0]==' '){
|
||||||
memcpy (bmpatm_s,bmpatm_s+1,strlen(bmpatm_s)+1);
|
memcpy (bmpatm_s,bmpatm_s+1,strlen(bmpatm_s)+1);
|
||||||
}
|
}
|
||||||
if(bmphum_s[0]==' '){
|
|
||||||
memcpy (bmphum_s,bmphum_s+1,strlen(bmphum_s)+1);
|
|
||||||
}
|
|
||||||
|
|
||||||
// Debug Print
|
// Debug Print
|
||||||
printf("Temp: %s\n",bmptemp_s);
|
printf("Temp: %s\n",bmptemp_s);
|
||||||
printf("Press: %s\n",bmppress_s);
|
printf("Press: %s\n",bmppress_s);
|
||||||
printf("Altitude: %s\n",bmpalt_s);
|
printf("Altitude: %s\n",bmpalt_s);
|
||||||
printf("atm: %s\n",bmpatm_s);
|
printf("atm: %s\n",bmpatm_s);
|
||||||
printf("hum: %s\n",bmphum_s);
|
|
||||||
}
|
}
|
||||||
|
|
|
||||||
Loading…
Reference in a new issue