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ATtinyBME280.h
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ATtinyBME280.h
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/******************************************************************************
SparkFunBME280.h
BME280 Arduino and Teensy Driver
Marshall Taylor @ SparkFun Electronics
May 20, 2015
https://github.com/sparkfun/BME280_Breakout
Resources:
Uses Wire.h for i2c operation
Uses SPI.h for SPI operation
Development environment specifics:
Arduino IDE 1.6.4
Teensy loader 1.23
This code is released under the [MIT License](http://opensource.org/licenses/MIT).
Please review the LICENSE.md file included with this example. If you have any questions
or concerns with licensing, please contact [email protected].
Distributed as-is; no warranty is given.
******************************************************************************/
// Test derived class for base class SparkFunIMU
#ifndef __BME280_H__
#define __BME280_H__
#include <Arduino.h>
#include "Pins.h"
//Register names:
#define BME280_DIG_P2_LSB_REG 0x90
#define BME280_DIG_P2_MSB_REG 0x91
#define BME280_DIG_P5_LSB_REG 0x96
#define BME280_DIG_P5_MSB_REG 0x97
#define BME280_DIG_P6_LSB_REG 0x98
#define BME280_DIG_P6_MSB_REG 0x99
#define BME280_DIG_P8_LSB_REG 0x9C
#define BME280_DIG_P8_MSB_REG 0x9D
#define BME280_CHIP_ID_REG 0xD0 //Chip ID
#define BME280_RST_REG 0xE0 //Softreset Reg
#define BME280_CTRL_HUMIDITY_REG 0xF2 //Ctrl Humidity Reg
#define BME280_STAT_REG 0xF3 //Status Reg
#define BME280_CTRL_MEAS_REG 0xF4 //Ctrl Measure Reg
#define BME280_CONFIG_REG 0xF5 //Configuration Reg
#define BME280_PRESSURE_MSB_REG 0xF7 //Pressure MSB
#define BME280_PRESSURE_LSB_REG 0xF8 //Pressure LSB
#define BME280_PRESSURE_XLSB_REG 0xF9 //Pressure XLSB
#define BME280_TEMPERATURE_MSB_REG 0xFA //Temperature MSB
#define BME280_TEMPERATURE_LSB_REG 0xFB //Temperature LSB
#define BME280_TEMPERATURE_XLSB_REG 0xFC //Temperature XLSB
#define BME280_HUMIDITY_MSB_REG 0xFD //Humidity MSB
#define BME280_HUMIDITY_LSB_REG 0xFE //Humidity LSB
// calibration values from the register hardcoded
#define DIG_T1 28500
#define DIG_T2 26420
#define DIG_T3 50
#define DIG_P1 37988
#define DIG_P3 3024
#define DIG_P4 10752
#define DIG_P7 9900
#define DIG_P9 4285
#define DIG_H1 75
#define DIG_H2 361
#define DIG_H3 0
#define DIG_H4 321
#define DIG_H5 50
#define DIG_H6 30
//Settings and configuration
#define NORMAL_MODE 0x03 // Normal mode
#define FILTER 0x00 // filter off
#define STANDBY 0x00 // 0.5ms
#define TEMP_OVERSAMPLE 0x01 // 1 * oversampling
#define PRESS_OVERSAMPLE 0x01 // 1 * oversampling
#define HUMID_OVERSAMPLE 0x01 // 1 * oversampling
//This is the man operational class of the driver.
class BME280
{
public:
int32_t t_fine;
//This also gets the SensorCalibration constants
void begin( void );
// force reading an go to sleep
void forceRead( void );
//Returns the values.
unsigned int readPressure( void );
unsigned char readHumidity( void );
int readTempC( void );
//Reads one register
uint8_t readRegister(uint8_t);
//Writes a byte;
void writeRegister(uint8_t, uint8_t);
};
#endif