mirror of
https://github.com/RobTillaart/Arduino.git
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140 lines
3.9 KiB
C++
140 lines
3.9 KiB
C++
#pragma once
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//
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// FILE: MS5611.h
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// AUTHOR: Rob Tillaart
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// Erni - testing/fixes
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// VERSION: 0.4.0
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// PURPOSE: Arduino library for MS5611 temperature and pressure sensor
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// URL: https://github.com/RobTillaart/MS5611
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#include "Arduino.h"
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#include "Wire.h"
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// BREAKOUT MS5611 aka GY63 - see datasheet
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//
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// SPI I2C
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// +--------+
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// VCC VCC | o |
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// GND GND | o |
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// SCL | o |
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// SDI SDA | o |
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// CSO | o |
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// SDO | o L | L = led
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// PS | o O | O = opening PS = protocol select
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// +--------+
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//
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// PS to VCC ==> I2C (GY-63 board has internal pull up, so not needed)
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// PS to GND ==> SPI
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// CS to VCC ==> 0x76
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// CS to GND ==> 0x77
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#define MS5611_LIB_VERSION (F("0.4.0"))
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#ifndef MS5611_DEFAULT_ADDRESS
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#define MS5611_DEFAULT_ADDRESS 0x77
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#endif
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#define MS5611_READ_OK 0
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#define MS5611_ERROR_2 2 // low level I2C error
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#define MS5611_NOT_READ -999
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enum osr_t
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{
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OSR_ULTRA_HIGH = 12, // 10 millis
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OSR_HIGH = 11, // 5 millis
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OSR_STANDARD = 10, // 3 millis
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OSR_LOW = 9, // 2 millis
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OSR_ULTRA_LOW = 8 // 1 millis Default = backwards compatible
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};
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class MS5611
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{
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public:
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explicit MS5611(uint8_t deviceAddress = MS5611_DEFAULT_ADDRESS, TwoWire *wire = &Wire);
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bool begin();
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bool isConnected();
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// reset command + get constants
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// mathMode = 0 (default), 1 = factor 2 fix.
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// returns false if ROM constants are 0;
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bool reset(uint8_t mathMode = 0);
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// the actual reading of the sensor;
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// returns MS5611_READ_OK upon success
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int read(uint8_t bits);
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// wrapper, uses the preset oversampling rate.
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inline int read() { return read( (uint8_t) _samplingRate); };
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// sets oversampling to a value between 8 and 12
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void setOversampling(osr_t samplingRate);
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// oversampling rate is in osr_t
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osr_t getOversampling() const { return (osr_t) _samplingRate; };
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// temperature is in ²C
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float getTemperature() const;
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// pressure is in mBar
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float getPressure() const;
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// OFFSET - 0.3.6
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void setPressureOffset(float offset = 0) { _pressureOffset = offset; };
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float getPressureOffset() { return _pressureOffset; };
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void setTemperatureOffset(float offset = 0) { _temperatureOffset = offset; };
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float getTemperatureOffset() { return _temperatureOffset; };
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// to check for failure
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int getLastResult() const { return _result; };
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// last time in millis() when the sensor has been read.
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uint32_t lastRead() const { return _lastRead; };
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// _deviceID is a SHIFT XOR merge of 7 PROM registers, reasonable unique
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uint32_t getDeviceID() const { return _deviceID; };
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void setCompensation(bool flag = true) { _compensation = flag; };
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bool getCompensation() { return _compensation; };
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// develop functions.
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/*
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void setAddress(uint8_t address) { _address = address; }; // RANGE CHECK + isConnected() !
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uint8_t getAddress() const { return _address; };
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uint8_t detectAddress() { todo }; // works with only one on the bus?
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*/
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// EXPERIMENTAL
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uint16_t getManufacturer();
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uint16_t getSerialCode();
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protected:
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void convert(const uint8_t addr, uint8_t bits);
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uint32_t readADC();
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uint16_t readProm(uint8_t reg);
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int command(const uint8_t command);
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void initConstants(uint8_t mathMode);
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uint8_t _address;
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uint8_t _samplingRate;
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int32_t _temperature;
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int32_t _pressure;
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float _pressureOffset;
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float _temperatureOffset;
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int _result;
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float C[7];
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uint32_t _lastRead;
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uint32_t _deviceID;
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bool _compensation;
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TwoWire * _wire;
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};
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// -- END OF FILE --
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