52 lines
1.0 KiB
C++
52 lines
1.0 KiB
C++
/*
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Copyright 2014 Marcus Sorensen <marcus@electron14.com>
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This program is licensed under the GNU GPL v2
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*/
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#ifndef si7021_h
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#define si7021_h
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#if (ARDUINO >= 100)
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#endif
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#ifdef __AVR_ATtiny85__
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#include "TinyWireM.h"
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#define Wire TinyWireM
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#else
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#include <avr/pgmspace.h>
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#include <Wire.h>
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#endif
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typedef struct si7021_env {
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int celsiusHundredths;
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int fahrenheitHundredths;
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unsigned int humidityPercent;
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} si7021_env;
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class SI7021
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{
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public:
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SI7021();
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bool begin();
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bool sensorExists();
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int getFahrenheitHundredths();
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int getCelsiusHundredths();
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unsigned int getHumidityPercent();
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unsigned int getHumidityBasisPoints();
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struct si7021_env getHumidityAndTemperature();
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int getSerialBytes(byte * buf);
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int getDeviceId();
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void setHeater(bool on);
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private:
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void _command(byte * cmd, byte * buf );
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void _writeReg(byte * reg, int reglen);
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int _readReg(byte * reg, int reglen);
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int _getCelsiusPostHumidity();
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};
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#endif
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