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https://github.com/RobTillaart/Arduino.git
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86 lines
2.0 KiB
C++
86 lines
2.0 KiB
C++
#pragma once
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//
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// FILE: DS1821.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.3.6
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// DATE: 2014-10-05
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// PURPOSE: Arduino library for DS1821 temperature sensor
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// URL: https://github.com/RobTillaart/DS1821
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//
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//
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// BOTTOM VIEW
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//
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// PIN MEANING
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// /---+
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// / o | 1 GND
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// | o | 2 DATA
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// \ o | 3 VCC
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// \---+
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#include "Arduino.h"
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#include "OneWire.h"
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#define DS1821_H_LIB_VERSION (F("0.3.6"))
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#define DS1821_RESET_OK 0
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#define DS1821_RESET_ERROR -999
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class DS1821
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{
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public:
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DS1821(OneWire* ow);
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// THERMOMETER MODE
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int requestTemperature();
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int requestContinuous();
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int stopContinuous();
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int conversionReady();
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float readTemperature();
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int error() { int e = _error; _error = 0; return e; };
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// High and low temperature 'alarm' flags.
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int setLow(int8_t lo);
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int getLow();
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int setHigh(int8_t hi);
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int getHigh();
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// flags in configuration register => 1 = triggered since clear
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int getHighFlag();
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int clrHighFlag();
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int getLowFlag();
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int clrLowFlag();
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// THERMOSTAT CONFIG
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// - be sure to read datasheet first!
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// - check the example
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// - DQ pin must be same the oneWire pin!
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int setOneWireMode(uint8_t VDD, uint8_t DQ);
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int setPolarity(int activeState); // HIGH or LOW
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int getPolarity();
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int setThermostatMode();
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private:
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OneWire * _oneWire;
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int _error;
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int _reset() { _error = _oneWire->reset(); return _error; };
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void _command(uint8_t cmd) { _oneWire->write(cmd); };
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uint8_t _readByte() { return _oneWire->read(); };
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uint8_t _waitForNVB();
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int _getConfigFlag(uint8_t flag);
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int _setConfigFlag(uint8_t flag);
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int _clrConfigFlag(uint8_t flag);
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int _readConfig();
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int _writeConfig(uint8_t val);
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uint8_t _VDD;
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uint8_t _DQ;
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};
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// -- END OF FILE --
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